WO2018130192A1

WO2018130192A1 - Rubber composite, aging-resistant rubber product applying same, and manufacturing method

Info

Publication number: WO2018130192A1
Application number: PCT/CN2018/072361
Authority: WO
Inventors: 徐涛; 傅智盛; 吴安洋
Original assignee: 杭州星庐科技有限公司
Priority date: 2017-01-13
Filing date: 2018-01-12
Publication date: 2018-07-19

Abstract

A rubber composite, a processing method, an aging-resistant rubber product applying the rubber composite, and a manufacturing method. The rubber composite comprises : a rubber substrate and essential components. The rubber substrate comprises : branched polyethylene, the content thereof being a : 0 < a ≤ 100 parts, ethylene propylene monomer rubber and ethylene propylene diene monomer rubber of the content of b : 0 ≤ b < 100 parts. The essential components comprise : a crosslinking agent 1.5-10 parts, a reinforcing filler 30-200 parts, and a plasticizer 5-250 parts. The beneficial effects are such that the rubber composite has great processing performance, is applicable in manufacturing rubber products having high requirements on the performance of aging resistance and on the performance of resistance against permanent deformation under compression.

Description

Rubber composition, and anti-aging rubber product and production method thereof

Technical field

The invention belongs to the technical field of rubber, and particularly relates to a rubber composition and a processing method thereof, and an anti-aging product and a production method using the rubber composition.

Background technique

Ethylene-propylene rubber is widely used in various applications where high resistance to aging and/or compression set is required due to its excellent aging resistance and good compression set resistance. Sulfur vulcanization and peroxide vulcanization are two conventional vulcanization methods for ethylene-propylene rubber. In order to obtain better aging resistance and compression set resistance, a peroxide crosslinking system is now gradually being used. However, the mechanical strength of peroxide-vulcanized ethylene-propylene rubber will be lower than that of sulfur-vulcanized ethylene-propylene rubber, which will lead to an increase in the risk of damage to the product during actual use, so at the same time improve the aging resistance and mechanics of ethylene-propylene rubber. Strength is a technical problem that needs to be solved urgently.

Ethylene-propylene rubber is a synthetic rubber with saturated molecular chain. It can be divided into two major categories: ethylene-propylene rubber and EPDM rubber. Both of them have good aging resistance. They are commonly used in ethylene-propylene rubber products. It is EPDM rubber, but because EPDM rubber contains a third monomer, the molecular chain contains double bonds, and the ethylene-propylene rubber molecular chain is completely saturated, so the ethylene-propylene rubber has more excellent resistance to aging. Sex, therefore, in the case of high requirements for aging resistance, it is a common technical solution to improve the aging resistance of EPDM by using ethylene propylene diene rubber together. However, the mechanical strength of the binary ethylene propylene rubber is low, which will affect the overall physical and mechanical properties.

Diethylene propylene rubber is a copolymer of ethylene and propylene and belongs to the copolymer of ethylene and α-olefin. Ethylene and α-olefin copolymers are polymers containing only hydrocarbon elements and saturated molecular chains. The common types of carbon atoms in such polymers are generally classified into primary, secondary and tertiary carbons, while tertiary carbons are the most It is easy to be trapped by hydrogen to form free radicals, so the ratio of tertiary carbon atoms to all carbon atoms is generally considered to be a major factor affecting the aging resistance of ethylene and α-olefin copolymers. The lower the ratio, the better the aging resistance. The ratio can be expressed by the degree of branching. For example, a diethylene propylene rubber having a propylene content of 60% by weight can be calculated to contain 200 propylene units per 1000 carbon atoms, that is, 200 tertiary carbon atoms or 200. One methyl branch, so its degree of branching is 200 branches / 1000 carbons. Ethylene ethylene propylene rubber generally has a weight percentage of 40% to 65% or 40% to 60%, so its branching degree is generally 117 to 200 branches/1000 carbons or 133 to 200 branches/ This degree of branching can be considered to be higher than other common ethylene and alpha-olefin copolymers in the 1000 carbon range.

In the prior art, the α-olefin in the common ethylene and α-olefin copolymer may be an α-olefin having a carbon number of not less than 4 in addition to propylene, and may be selected from a C ₄ - C ₂₀ α-olefin. It is usually selected from the group consisting of 1-butene, 1-hexene and 1-octene. If the degree of branching of the copolymer of ethylene and α-olefin is too low, the melting point and crystallinity are too high, and it is not suitable for use as a rubber component. If the degree of branching is high, the content of α-olefin is high, which may result in Process difficulty and raw material cost are high, and operability and economy are low. In the prior art, a polyolefin obtained by copolymerizing ethylene with 1-butene or ethylene and 1-octene may be referred to as a polyolefin plastomer or a polyolefin elastomer according to the degree of crystallinity and melting point, and a part of the polyolefin is elastic. Due to its proper crystallinity and melting point, it can be used well with ethylene propylene rubber and has a low degree of branching. It is considered to be an ideal material for improving the aging resistance of ethylene propylene rubber. It can replace ethylene propylene rubber to a certain extent. use. Since the molecular chain of ethylene and 1-octene copolymer is softer, more rubbery and has good physical and mechanical properties relative to the copolymer of ethylene and 1-butene, the polyolefin elastomer commonly used in rubber products is generally ethylene. And the copolymer of 1-octene, the octene weight percentage is generally not higher than 45%, more commonly not higher than 40%, the corresponding degree of branching is generally not higher than 56 branches / 1000 carbon, The more commonly used degree of branching is not higher than 50 branches/1000 carbons, which is much lower than the degree of branching of ethylene dipropylene rubber, so it has excellent aging resistance and good physical and mechanical properties.

The rubber generally needs to be used after cross-linking. In the cross-linking mode commonly used for ethylene-propylene rubber, the copolymer of ethylene and α-olefin may be peroxide cross-linking or irradiation cross-linking, both of which are mainly obtained by capturing tertiary carbon. a hydrogen atom forms a tertiary carbon radical, and then forms a carbon-carbon crosslink by radical bonding, but a copolymer of ethylene and 1-octene (hereinafter referred to as POE) has fewer tertiary carbon atoms and is attached to a tertiary carbon atom. Chain length, large steric hindrance, difficulty in radical reaction, resulting in difficulty in crosslinking, affecting processing efficiency and product performance, such as compression set resistance is unsatisfactory.

Therefore, there is a need for a better technical solution that can improve the aging resistance of ethylene propylene rubber, and at the same time, it can have better physical and mechanical properties and cross-linking performance, and is expected to be specific to the functional indexes required for rubber products (such as anti- Compression, permanent deformation, etc.) have a good performance.

Summary of the invention

The present invention provides a novel rubber composition and the ethylene-propylene rubber which is present in the prior art is easily aged by sulfur vulcanization, and the peroxide is vulcanized to make the ethylene-propylene rubber have a tear strength lower than that of the sulfur vulcanized ethylene-propylene rubber. The processing method also provides an application and processing method for processing an anti-aging rubber product by the rubber composition.

In order to achieve the above object, the present invention adopts the following technical solution: a rubber composition is provided, wherein the rubber composition comprises, in parts by weight, a rubber matrix and a necessary component, the rubber matrix comprising: a branched polymer The content of ethylene a: 0 < a ≤ 100 parts, the content of ethylene propylene rubber b: 0 ≤ b < 100 parts, based on 100 parts by weight of the rubber matrix, the necessary components include: 1.5 to 10 parts of a crosslinking agent, 30-200 parts of strong filler, 5~250 parts of plasticizer, wherein the branching degree of branched polyethylene is not less than 50 branches/1000 carbons, the weight average molecular weight is not less than 50,000, Mooney viscosity ML (1+4) 125 ° C is not less than 2.

"Branched polyethylene" in the prior art means, in addition to a branched ethylene homopolymer, a branched saturated vinyl copolymer, such as an ethylene-α-olefin copolymer, which may be POE, although POE performs well in physical and mechanical properties and aging resistance, but cross-linking performance is not good, although the branched polyethylene of the present invention can contain both branched ethylene homopolymer and POE, but a better choice It is a branched polyethylene having a high proportion of branched polyethylene or a branched ethylene homopolymer. In a preferred embodiment of the invention, the branched polyethylene contains only branched ethylene homopolymer.

In the further elaboration of the technical solution of the present invention, the branched polyethylene used is a branched ethylene homopolymer unless otherwise specified.

The branched polyethylene used in the present invention is a kind of ethylene homopolymer having a branching degree of not less than 50 branches/1000 carbons, and can be called Branched Polyethylene or Branched PE. Currently, the synthesis method is mainly composed of a late transition metal catalyst. The homopolymerization of ethylene is catalyzed by a "chain walking mechanism", and the preferred late transition metal catalyst may be one of (α-diimine) nickel/palladium catalysts. The nature of the chain walking mechanism refers to the late transition metal catalyst. For example, the (α-diimine) nickel/palladium catalyst is more likely to undergo β-hydrogen elimination reaction and re-insertion reaction in the process of catalyzing olefin polymerization, thereby causing branching. Branched chains of such branched polyethylenes may have different numbers of carbon atoms, specifically 1 to 6, or more carbon atoms.

The production cost of the (α-diimine) nickel catalyst is significantly lower than that of the (α-diimine) palladium catalyst, and the (α-diimine) nickel catalyst catalyzes the high rate of ethylene polymerization and high activity, and is more suitable for industrial applications. Therefore, the branched polyethylene prepared by the ethylene polymerization of the (α-diimine) nickel catalyst is preferred in the present invention.

The degree of branching of the branched polyethylene used in the present invention is preferably 50 to 130 branches/1000 carbons, further preferably 60 to 130 branches/1000 carbons, further preferably 60 to 116 branches/1000. A carbon, the degree of branching between POE and ethylene-propylene rubber, is a new technical solution that is different from the prior art, and can have excellent aging resistance and good cross-linking performance.

Cross-linking performance includes factors such as crosslink density and cross-linking rate, which is the specific performance of the cross-linking ability of the rubber matrix during processing.

The branched polyethylene used in the present invention preferably has a methyl branch content of 40% or more or 50% or more, and has a certain similarity with the structure of the ethylene propylene diene rubber. In terms of cross-linking ability, the degree of branching (tertiary carbon atom content) and the steric hindrance around the tertiary carbon atom are the two main factors affecting the cross-linking ability of the saturated polyolefin. The branched polyethylene used in the present invention is low in degree of branching relative to the ethylene propylene rubber, and since the branched polyethylene has a branch having a carbon number of not less than 2, the branched polycondensation used in the present invention The steric hindrance around the tertiary carbon atom of ethylene is theoretically larger than that of ethylene propylene rubber. It can be judged by combining two factors that the crosslinking ability of the branched polyethylene used in the present invention should be weaker than that of the ethylene propylene rubber. In EPDM rubber. However, the actual cross-linking ability of the partially branched polyethylene used in the present invention is close to that of EPDM rubber, and may even be equal to or better than EPDM rubber. This means that the rubber composition of the present invention can obtain a good aging resistance, can also not weaken the crosslinking ability, and can even have excellent crosslinking performance to achieve an unexpected beneficial effect.

This may be explained by the fact that there may be an appropriate number of secondary branched structures on the branched polyethylene used in the preferred embodiment of the present invention, and the so-called secondary branched structure refers to a structure in which branches are further branched. This is also known as "branch-on-branch" during chain walking. Because of the low steric hindrance around the tertiary carbon atoms of the secondary branches, cross-linking reactions are more likely to occur. Having a secondary branched structure is a distinct distinction between the branched polyethylene used in the preferred embodiment of the invention and the prior art ethylene dipropylene rubber or the conventional ethylene-α-olefin copolymer.

It is a new technical solution to improve the cross-linking ability of saturated polyolefin elastomer by using the secondary steric structure with lower steric hindrance. Under the technical solution of the present invention, it is also considered to be within the technical protection of the present invention to include a vinyl copolymer having a secondary branched structure or other saturated hydrocarbon polymer in the rubber matrix. The vinyl copolymer refers to a copolymer of ethylene and a branched α-olefin, and has a secondary branched structure, wherein the branched α-olefin may be selected from the group consisting of isobutylene and 3-methyl-1- Butylene, 4-methyl-1-pentene, 3-methyl-1-pentene, 2-methyl-1-heptene, 3-methyl-1-heptene, 4-methyl-1- The heptene, 5-methyl-1-heptene, 6-methyl-1-heptene, and the like, the comonomer may also contain a common linear alpha-olefin.

It is generally believed in the prior art that the branched polyethylene prepared by the (α-diimine) nickel catalyst is difficult to exist in the secondary branched structure, and at least it is difficult to sufficiently distinguish it. The technical solution of the present invention is also to analyze the branched polycondensation. The structure of ethylene provides a new idea.

Compared with ethylene propylene rubber, when the branched polyethylene has an appropriate number of secondary branched structures, the cross-linking point of the branched polyethylene can be generated on the tertiary chain of the main chain during the peroxide crosslinking process. It can also be produced on the branched tertiary carbon of the secondary structure, so the rubber network formed by the cross-linking of the branched polyethylene has a richer CC connecting segment between the main chains than the ethylene-propylene rubber. The length can effectively avoid stress concentration and help to obtain better mechanical properties, including tear strength. On the other hand, better cross-linking ability can effectively increase the cross-linking density, and the molecular weight distribution of the branched polyethylene is close to 2, which is narrower than that of the general ethylene-propylene rubber, so that it is also expected to obtain better compression set resistance.

Further, the rubber composition comprises, in parts by weight, a rubber matrix comprising 100 parts of branched polyethylene, and the necessary components, wherein the necessary components are included in 100 parts by weight of the rubber matrix. 2 to 7 parts of the crosslinking agent, 30 to 200 parts of the reinforcing filler, and 8 to 150 parts of the plasticizer.

Further, the crosslinking agent includes at least one of a peroxide crosslinking agent and sulfur, and the peroxide crosslinking agent includes di-tert-butyl peroxide, dicumyl peroxide, and tert-butyl group. Cumyl peroxide, 1,1-di-tert-butyl peroxide-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-di(tert-butylperoxide) Hexane, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne-3, bis(tert-butylperoxyisopropyl)benzene, 2,5-dimethyl- At least one of 2,5-bis(benzoyl peroxy)hexane, tert-butyl peroxybenzoate, and t-butylperoxy-2-ethylhexyl carbonate.

In a further aspect, the reinforcing filler comprises at least one of carbon black, white carbon black, calcium carbonate, talc, calcined clay, magnesium silicate, and magnesium carbonate.

Further, the plasticizer comprises at least at least of pine tar, motor oil, naphthenic oil, paraffin oil, coumarone, RX-80, stearic acid, paraffin, liquid polyisobutylene, fatty acid derivatives, and mixtures thereof. One. The plasticizer is further preferably used in an amount of 15 to 120 parts by weight. Among them, stearic acid can also act as an active agent in sulfur-sulfur-based systems, and can form soluble salts with some metal oxides, thereby increasing the activation of metal oxides on promoters. The rational use of plasticizers can increase the flexibility of the compound and the plasticity suitable for process operation. In order to increase the viscosity, it is also preferred to use an adhesion promoter such as pine tar, coumarone, RX-80, liquid polyisobutylene or the like.

In a further aspect, the rubber composition further comprises an auxiliary component, wherein the auxiliary component comprises: 0.2 to 10 parts of a co-crosslinking agent, 0.5 to 3 parts of a stabilizer, and a metal oxide 2 to 1 part by weight of the rubber matrix. 15 parts, vulcanization accelerator 0 to 3 parts.

Further, the co-crosslinking agent comprises triallyl cyanurate, triallyl isocyanurate, ethylene glycol dimethacrylate, ethyl dimethacrylate, dimethyl Triethylene glycol acrylate, triallyl trimellitate, trimethylolpropane trimethacrylate, ethylene glycol dimethacrylate, N, N'-m-phenylene bismaleimide, At least one of N,N'-bis-indenyl acetonide, 1,2-polybutadiene, p-nonane, sulphur, and a metal salt of an unsaturated carboxylic acid. The unsaturated carboxylic acid metal salt contains at least one of zinc acrylate, zinc methacrylate, magnesium methacrylate, calcium methacrylate, and aluminum methacrylate.

In a further aspect, the metal oxide is at least one of zinc oxide, magnesium oxide, calcium oxide, lead monoxide, and lead tetraoxide.

In a further embodiment, the stabilizer comprises 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD), 6-ethoxy-2,2,4-trimethyl- At least one of 1,2-dihydroquinoline (AW) and 2-mercaptobenzimidazole (MB).

Further, the vulcanization accelerator comprises 2-thiol benzothiazole, dibenzothiazole disulfide, tetramethylthiuram monosulfide, tetramethylthiuram disulfide, tetraethyl disulfide Of thiuram, N-cyclohexyl-2-benzothiazolyl sulfenamide, N,N-dicyclohexyl-2-phenylthiazolyl sulfenamide, bismaleimide, ethylene thiourea At least one.

A further solution is that the selected ethylene-propylene rubber and ethylene propylene diene rubber have a Mooney viscosity ML (1+4) of 20 to 80 at 125 ° C and an ethylene content of 45% to 70%.

Further, the content of the branched polyethylene in the 100 parts by weight of the rubber matrix is a: 10 ≤ a ≤ 100 parts; the total content of the binary ethylene propylene rubber and the EPDM rubber is b: 0 ≤ b ≤ 90 The branched polyethylene is characterized by being an ethylene homopolymer having a degree of branching of 60 to 130 branches/1000 carbons, a weight average molecular weight of 66,000 to 518,000, and a Mooney viscosity ML (1+). 4) 125 ° C is 6 to 102.

A further technical solution is that the content of the branched polyethylene in the 100 parts by weight of the rubber matrix is a: 10 ≤ a ≤ 100 parts; the content of the binary ethylene propylene rubber and the ethylene propylene diene rubber is b: 0 ≤ b ≤ 90 The branched polyethylene is an ethylene homopolymer having a degree of branching of 70 to 116 branches/1000 carbons, a weight average molecular weight of 201,000 to 436,000, and a Mooney viscosity of ML(1+4)125. °C is 23-101;

A further technical solution is that the content of the branched polyethylene in the 100 parts by weight of the rubber matrix is a: 10 ≤ a ≤ 100 parts; the content of the binary ethylene propylene rubber and the ethylene propylene diene rubber is b: 0 ≤ b ≤ 90 The branched polyethylene is an ethylene homopolymer having a degree of branching of 80 to 105 branches/1000 carbons, a weight average molecular weight of 250,000 to 400,000, and a Mooney viscosity of ML (1+4) 125. °C is 40 to 95.

A further technical solution is that the content of the branched polyethylene in the 100 parts by weight of the rubber matrix is a: 10 ≤ a ≤ 100 parts; the content of the binary ethylene propylene rubber and the ethylene propylene diene rubber is b: 0 ≤ b ≤ 90 The branched polyethylene is an ethylene homopolymer having a degree of branching of 80 to 105 branches/1000 carbons, a weight average molecular weight of 268,000 to 356,000, and a Mooney viscosity of ML (1+4) 125. °C is 42-80.

In a further aspect, the third monomer of the ethylene propylene diene monomer is preferably a diene monomer, specifically selected from the group consisting of 5-ethylidene-2-norbornene and 5-vinyl-2-norbornene. Alkene, dicyclopentadiene, 1,4-hexadiene, 1,5-hexadiene, 1,4-pentadiene, 2-methyl-1,4-pentadiene, 3-methyl-1 , 4-hexadiene, 4-methyl-1,4-hexadiene, 1,9-decadiene, 5-methylene-2-norbornene, 5-pentylene-2-norborn Alkene, 1,5-cyclooctadiene, 1,4-cyclooctadiene, and the like. Specifically, the ethylene propylene rubber may contain two or more kinds of diene monomers at the same time, such as 5-ethylidene-2-norbornene and 5-vinyl-2-norbornene. The functional group of the diene monomer can play the same role as the intrinsic co-crosslinking agent in the peroxide vulcanization, thereby improving the crosslinking efficiency. This helps to reduce the amount and residual amount of crosslinker and co-crosslinker required and the cost of adding them. The weight specific gravity of the diene monomer to the ethylene propylene rubber is preferably from 1% to 14%, more preferably from 3% to 10%, still more preferably from 4% to 7%.

In an embodiment of the present invention, in order to improve the viscosity of the rubber compound, the rubber composition may further comprise a tackifier, wherein the plasticizer is pine tar, coumarone resin, RX-80, and liquid polyisobutylene. The role of the adhesive, wherein the liquid coumarone resin has a better viscosity-increasing effect than the solid coumarone resin, and the tackifier may also be selected from the group consisting of C5 petroleum resin, C9 petroleum resin, hydrogenated rosin, terpene resin, alkyl group. A commonly used tackifier such as a phenol resin, a modified alkyl phenol resin, or an alkyl phenol-acetylene resin, and the tackifier is generally not more than 30 parts by weight, further preferably not more than 10 parts by weight, based on 100 parts by weight of the rubber base. It is further preferably not more than 5 parts by weight.

The crosslinking agent, the co-crosslinking agent and the vulcanization accelerator involved in the rubber composition provided by the present invention all belong to a crosslinking system.

The rubber composition of the present invention may be present in the form of an uncrosslinked rubber compound, and may be present in the form of a vulcanized rubber after further crosslinking reaction. Vulcanized rubber can also be referred to simply as vulcanizate.

The present invention also provides a method of processing the above rubber composition, comprising the steps of:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, and sequentially adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, and discharging the rubber after mixing. , the rubber compound is thinly passed through the open mill and parked, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator;

(2) Vulcanization: The bottled rubber after filling is filled into the cavity of the preheating mold, and subjected to high temperature pressure vulcanization. After the vulcanization is completed, the vulcanized rubber is obtained by demoulding. In order to improve the compression set resistance of the vulcanizate, it is further possible to carry out vulcanization using a two-stage vulcanization process.

The present invention also provides a bridge plate type rubber support comprising a steel sheet and a rubber sheet layer, wherein the rubber sheet layer comprises the above rubber composition.

The present invention also provides a bridge plate type rubber support comprising a steel sheet, a polytetrafluoroethylene sheet and a rubber sheet layer, wherein the rubber sheet layer comprises the above rubber composition.

The invention also provides a method for producing a bridge plate rubber bearing, which is formed by pressing and vulcanizing a rubber sheet between each layer and a steel plate and a polytetrafluoroethylene plate by a coating adhesive, and then bonding the whole into a whole. The steps involved in its production method are as follows:

(1) Rubber mixing process: setting the temperature of the internal mixer and the rotation speed of the rotor, and sequentially adding the components other than the crosslinking system in the rubber composition used for the rubber sheet layer to the internal mixer for mixing; then adding a crosslinking system, After the mixing, the rubber is discharged in the open machine, parked and tested. After numbering, refining and calendering, the film is punched into a semi-finished film of the required specifications for use in the vulcanization process. The crosslinking system comprises a crosslinking agent, and may further comprise at least one of a co-crosslinking agent and a vulcanization accelerator;

(2) Vulcanization process: the film and the surface-treated and coated adhesive steel plate and the polytetrafluoroethylene plate are sequentially stacked according to the process requirements, and then loaded into the preheated mold, and then vulcanized into the flat vulcanizing machine. forming;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the finished rubber bearing is taken out, cooled, parked and trimmed to obtain the finished product.

The present invention also provides a basin type rubber support, the rubber pressure receiving plate comprising the above rubber composition.

The invention also provides a method for producing a basin rubber bearing, wherein the basin rubber bearing comprises an upper support plate, a stainless steel plate, a polytetrafluoroethylene plate, an intermediate steel plate, a sealing ring, a rubber bearing plate and a lower branch. The seat plate and the anchor bolt are assembled, and the production method includes the following steps:

(1) Rubber mixing process: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition used for the rubber bearing plate to the internal mixer for mixing; then adding the crosslinking system After the mixing, the rubber is discharged, and the rubber compound is thinly passed through the open mill, and is parked and tested. The crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator. .

(2) Vulcanization molding process: the film is loaded into a preheated mold, and then vulcanized into a flat vulcanizer;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the finished rubber bearing is taken out, cooled and parked and trimmed to obtain a rubber bearing plate;

(4) Assembly: The rubber bearing plate is assembled with other components to obtain a basin rubber bearing.

The present invention also provides a bridge rubber expansion device, the rubber expansion body comprising the above rubber composition.

The invention also provides a method for producing a bridge rubber expansion device, wherein the rubber expansion body adopts an extrusion method and the steps included in the production method are as follows:

(1) Rubber mixing process: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, after mixing Discharging, laminating the rubber in the open mill, parking and testing, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator;

(2) Extrusion and vulcanization: The extrusion vulcanization process should adopt a vacuum extruder, and after the extrusion, a salt bath vulcanization process is adopted, and the vulcanizate is obtained by spraying, dipping, dipping, and cooling;

(3) After trimming, inspection, and obtaining the finished product.

The invention also provides a method for producing a bridge rubber expansion device, wherein the rubber expansion body adopts the molding method and comprises the following steps, as follows:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, adding the components other than the crosslinking system in the rubber composition to the internal mixer, and then adding the crosslinking system and mixing. After the rubber is glued, the rubber compound is thinned in the open mill, parked and tested, and the film is re-smelted and weighed. The cross-linking system contains a crosslinking agent, and may also contain a crosslinking agent and vulcanization promotion. At least one of the agents;

(2) Molding vulcanization: the formed rubber compound is placed in a mold and vulcanized by a high temperature steam vulcanization process;

(3) Cooling, trimming, inspection, and obtaining finished products.

The present invention also provides a rubber steel plate combined type expansion and contraction device, wherein the rubber expandable body comprises the above rubber composition.

The invention also provides a method for producing a bridge rubber expansion device, the production method comprising the following steps:

(2) vulcanization process: the film and the surface treated and coated adhesive steel plate are laminated according to the process requirements, and then loaded into the preheated mold, and then enter the flat vulcanizing machine to heat and press vulcanize;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the product is taken out, cooled, parked and trimmed to obtain a finished product.

The present invention also provides a rubber sleeper pad comprising the rubber composition of the above claims.

The invention also provides a method for producing a rubber sleeper pad, the production method comprising the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading Rear glue. After being parked and tested, it is subjected to hot-smelting, and then discharged according to the required thickness, and cut into a desired shape for use in a vulcanization process, wherein the cross-linking system contains a crosslinking agent, and may also include a co-crosslinking agent and a vulcanization accelerator. At least one of them.

(2) vulcanization: put the cut rubber into the mold, put the mold into the flat vulcanizing machine, heat and pressure vulcanization;

The present invention also provides a rubber fender comprising the above rubber composition.

The present invention also provides a method of producing a rubber fender, the production method comprising the steps of:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, adding the components other than the crosslinking system in the rubber composition to the internal mixer, and then adding the crosslinking system, mixing and arranging a glue, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator;

(2) Molding and vulcanization: The mixing rubber is put into the cavity, and then the mold is closed, the rubber is fully flowed, exhausted, closed, and vulcanized.

(3) Open the mold, take out the product, trim, inspect, and obtain the finished product.

The present invention also provides a rubber waterstop tape comprising the above rubber composition.

The invention also provides a method for producing a rubber waterstop, the production method comprising the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading After the rubber is glued, the rubber compound is thinned in the open mill, parked and tested, and the film is re-smelted and weighed. The cross-linking system contains a crosslinking agent, and may also contain a crosslinking agent and vulcanization promotion. At least one of the agents;

The present invention also provides a steel belt rubber waterstop tape, the rubber compound used comprising the above rubber composition.

The invention also provides a method for producing a steel belt rubber waterstop, the production method comprising the following steps:

(2) vulcanization: the film and the surface-treated and coated adhesive sheet are laminated according to the process requirements, and then loaded into the preheated mold, and then into the flat vulcanizing machine at high temperature and high pressure vulcanization;

The present invention also provides a shock absorbing mount for a vehicle, the rubber compound used comprising the above rubber composition.

The invention also provides a method for producing a shock absorber support for a vehicle, the production method comprising the following steps:

(2) vulcanization: the film and the surface-treated and coated metal parts are laminated according to the process requirements, and then loaded into the preheated mold, and then enter the flat vulcanizing machine at high temperature and high pressure vulcanization;

The present invention also provides a rubber roller comprising the above rubber composition.

The invention also provides a method for producing a rubber roller, the production method comprising the following steps:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, mixing and arranging a glue, the rubber compound is thinly passed through the open mill, parked and tested, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator;

(2) Wrap-wrapping: Put the rubber mixture into the screw extruder, and the film of thickness and width required by the extrusion process. After the film is uniform, start the rotating wrapping machine and wrap the film on the prepared metal roll core. , wrapping the rubber layer by layer until the thickness of the rubberized single side reaches a predetermined thickness, and then winding 2 to 3 layers of nylon water cloth on the rubber surface to obtain a rubberized rubber roll;

(3) vulcanization tank vulcanization, the rubberized rubber roller is sent to the vulcanization tank, after closing the tank door, steam is vulcanized into the vulcanization tank, and the compressed air valve is opened while steam is introduced, and the compressed air is passed to vulcanize. The pressure in the tank reaches 4.5 to 5 atmospheres in 0.5 hours; the vulcanization procedure is: firstly heat up to 70-80 ° C, keep warm for 2 hours; then heat up to 100-110 ° C, keep warm for 0.5 hours; then heat up to 120-130 ° C, keep warm 0.5 hours; further heating to 135 ~ 140 ° C, holding 8 ~ 10 hours, the end of vulcanization, open the exhaust valve, the pressure drops, when the pressure gauge pointer points to zero, open the insurance pin, and the steam hole in the pin hole, half Open the vulcanization tank and let the temperature drop. When the temperature inside the tank is lower than 60 ° C or equivalent to the room temperature, the rubber roller is pulled out;

(4) Post-treatment: the vulcanized rubber roller is rough-processed on a lathe, and then finished on a grinding machine for inspection and inspection to obtain a finished product;

The present invention also provides a high temperature resistant V-ribbed belt comprising a compression layer and a buffer layer, the buffer layer compound comprising the above rubber composition.

The invention also provides a method for producing a high temperature resistant V-ribbed belt, the production method comprising the following steps:

(1) Rubber kneading: wherein the mixing of the buffer layer rubber is: setting the temperature of the internal mixer and the rotation speed of the rotor, and sequentially adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; Then, the crosslinking system is added, the rubber is mixed after the mixing, and the rubber mixture is thinly passed through the open mill, and is parked and tested. The crosslinking system contains a crosslinking agent, and may also include a crosslinking agent and a vulcanization accelerator. At least one of them;

(2) Molding: The reverse molding method is adopted. First, hang the optical mold on the molding machine, clean the mold, apply a small amount of release agent, and after it is volatilized, wrap the V-ribbed top cloth on the optical mold, and then wrap the buffer layer rubber to correct the tension of the rope. After winding the strength layer, the buffer rubber is applied, and finally the wedge rubber is wrapped to the outer circumference required by the molding process to obtain a strip;

(3) Vulcanization: The vulcanized vulcanization process is used to feed the strip into the vulcanization tank for vulcanization. The vulcanization temperature is 155-175 ° C, the internal pressure is 0.45-0.55 MPa, the external pressure is 1.0-1.2 MPa, and the vulcanization time is 25-30. minute;

(4) Post-treatment: After the end of vulcanization, the mold is cooled and cooled, and the belt is fed into the cutting process, and cut according to the required width. Grinding the back, grinding the wedge, and trimming the product to obtain the finished product.

The present invention also provides a wiper strip comprising the above rubber composition.

The invention also provides a method for producing a wiper strip, the production method comprising the following steps:

(2) vulcanization: the rubber compound is injected into the cavity and vulcanized under high temperature and high pressure;

(3) Post-treatment: The vulcanized product is subjected to surface treatment and inspection to obtain a finished product.

The present invention also provides a seal ring comprising a rubber composition as described above.

The invention also provides a method for producing a sealing ring, the production method comprising the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading After the rubber is glued, the rubber compound is thinly passed through the open mill, the physical property is detected, the rubber is refining, and then the semi-finished product is obtained by extrusion. The cross-linking system contains a crosslinking agent, and may also contain a crosslinking agent. And at least one of a vulcanization accelerator;

(2) Vulcanization: one-stage compression vulcanization: temperature is 155-170 ° C, vulcanization time is 20-25 minutes; second-stage oven vulcanization: temperature 145-155 ° C, time 40-80 minutes.

The present invention also provides a waterproofing membrane comprising the above rubber composition.

The invention also provides a method for producing a waterproof coil, the production method comprising the following steps:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, mixing and arranging Glue, the kneaded rubber is fully thinned and kneaded in the open mill to obtain a uniformly mixed rubber flakes, cooled to below 50 ° C to be discharged and stacked, wherein the cross-linking system contains a crosslinking agent, and may also contain a cross-linking agent. At least one of a agent and a vulcanization accelerator;

(2) Hot-smelting: the uniformly mixed rubber flakes are heat-treated on the open mill until the rubber sheet is smooth and evenly rolled up;

(3) calendering: the rubber sheet which has been preliminarily rolled into a roll is placed on a calender, and the roll pitch is adjusted according to the thickness requirement of the finished product to obtain a semi-finished coil material meeting the requirements of the thickness specification of the finished product;

(4) Winding: According to the specification length requirements of the finished coil, the isolation liner layer is sandwiched, and the semi-finished coil is consolidated into a roll;

(5) vulcanization: the rolled material is placed in a nitrogen-containing vulcanization kettle for vulcanization treatment, the temperature of the vulcanization kettle is controlled between 155 and 165 ° C, the pressure is between 20 and 25 MPa, and the vulcanization is for 25 to 30 minutes;

(6) Rewinding: re-opening the vulcanized coil, taking out the release liner layer, and then rewinding and packaging into a product.

The present invention also provides a weather strip comprising the above rubber composition. The rubber sealing strip provided by the invention can be used as a radiator plate rubber seal of an engine cooling system.

The present invention also provides a method of producing a weather strip using a process of compression vulcanization and stage vulcanization, comprising the steps of:

(2) The rubber compound after passing the test is extruded through an extruder, cut off, placed in a mold of a vulcanization apparatus, and subjected to a vulcanization under high temperature and high pressure. The pressure is preferably 14 to 16 MPa, the temperature is preferably 170 to 185 ° C, and the curing time is preferably 2 to 3 minutes;

(3) trimming the vulcanized product;

(4) The trimmed product is subjected to two-stage vulcanization at a high temperature. The temperature is preferably 165 to 175 ° C, and the time is preferably 25 to 35 minutes;

(5) Inspect the product and put it into storage after passing the test.

The present invention also provides an inner tube characterized in that the rubber used for the carcass comprises the above rubber composition.

The invention also provides a method for producing a inner tube, comprising the steps of: first kneading rubber, filtering and parking; then extruding through an extruder, cutting according to the length required by the process, sticking the valve, splicing After parking; then inflated and shaped, steam vulcanized, cooled, inspected, trimmed to get the finished product.

The invention has the beneficial effects of providing a new rubber composition, partially or completely replacing ethylene propylene rubber with branched polyethylene, and applying it to high requirements for aging resistance and/or compression set resistance. On the rubber product, it can obtain good heat resistance, compression set resistance and mechanical strength under the peroxide vulcanization system. The principle is that the molecular structure of the branched polyethylene is completely saturated, the heat aging resistance is similar to that of the ethylene propylene rubber, and it is superior to the EPDM rubber, and both can be vulcanized using a peroxide system. Moreover, since the molecular structure of the branched polyethylene has more branches, and the length of the branch has a certain length and length distribution, when the branched polyethylene has an appropriate number of secondary branched structures, the peroxide cross-linking process In the middle, the crosslinking point of the branched polyethylene may be generated on the tertiary carbon of the main chain, or may be generated on the branched tertiary carbon of the secondary structure, so the rubber network formed by crosslinking the branched polyethylene through peroxide is Compared with ethylene-propylene rubber, the main chain has a richer CC chain segment length, similar to the polysulfide bond distribution in the sulfur vulcanization system, which can effectively avoid stress concentration and facilitate better mechanical properties.

The compression set property is related to the molecular weight distribution of the rubber material. The rubber with narrow molecular weight distribution has relatively low compression set. The molecular weight distribution of ethylene propylene rubber is mostly between 3 and 5, and the highest is 8-9. The partial ethylene propylene rubber has a molecular weight distribution close to 2 and is convenient to process, but the cost is high. Since the molecular weight distribution of the branched polyethylene is narrow, generally less than 2.5, which is significantly smaller than the molecular weight distribution of the ordinary ethylene propylene rubber, the rubber composition of the present invention It has a lower compression set after vulcanization.

detailed description

The following examples are given to further illustrate the present invention, but are not intended to limit the scope of the present invention, and some non-essential improvements and adjustments made by those skilled in the art based on the present invention remain within the scope of the present invention. .

A specific embodiment of the rubber composition provided by the present invention is

Provided is a rubber composition comprising, in parts by weight, a rubber matrix and a necessary component, wherein the rubber matrix comprises: a content of branched polyethylene a: 0 < a ≤ 100 parts, content of ethylene propylene rubber b : 0 ≤ b < 100 parts, the necessary components include: 1.5 to 10 parts of a crosslinking agent, 30 to 200 parts of a reinforcing filler, and 5 to 250 parts of a plasticizer. The branching degree of the branched polyethylene is not less than 50 branches/1000 carbons, the weight average molecular weight is not less than 50,000, and the Mooney viscosity ML (1+4) is not lower than 2 at 125 °C.

In a preferred embodiment, the rubber composition comprises, in parts by weight, a rubber matrix comprising 100 parts of branched polyethylene, and 100 parts by weight of the rubber matrix, the necessary components including 2 to 7 parts of the crosslinking agent, 30 to 200 parts of the reinforcing filler, and 8 to 150 parts of the plasticizer.

In the present embodiment, the crosslinking agent includes at least one of a peroxide crosslinking agent and sulfur, and the peroxide crosslinking agent includes di-tert-butyl peroxide, dicumyl peroxide, and t-butyl Base peroxide, 1,1-di-tert-butyl peroxide-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-di(tert-butylperoxide) Hexane, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne-3, bis(tert-butylperoxyisopropyl)benzene, 2,5-dimethyl-2 At least one of 5-di(benzoyl peroxide)hexane, tert-butyl peroxybenzoate, and t-butylperoxy-2-ethylhexyl carbonate. The reinforcing filler includes at least one of carbon black, white carbon black, calcium carbonate, talc, calcined clay, magnesium silicate, and magnesium carbonate. The plasticizer includes at least one of pine tar, motor oil, naphthenic oil, paraffin oil, coumarone, RX-80, stearic acid, paraffin, liquid polyisobutylene, fatty acid derivatives, and mixtures thereof.

The rubber composition further includes an auxiliary component comprising 0.2 to 10 parts of a co-crosslinking agent, 0.5 to 3 parts of a stabilizer, 2 to 15 parts of a metal oxide, and 0 to 3 parts of a vulcanization accelerator. Wherein, the co-crosslinking agent comprises triallyl cyanurate, triallyl isocyanurate, ethylene glycol dimethacrylate, ethyl dimethacrylate, triethylene glycol dimethacrylate , triallyl trimellitate, trimethylolpropane trimethacrylate, ethylene glycol dimethacrylate, N, N'-m-phenylene bismaleimide, N, N'- At least one of bis-indenyl acetonide, 1,2-polybutadiene, p-quinone quinone, sulfur, zinc acrylate, zinc methacrylate, magnesium methacrylate, calcium methacrylate, and aluminum methacrylate.

Pine tar

The metal oxide is at least one of zinc oxide, magnesium oxide, calcium oxide, lead monoxide, and lead tetraoxide.

Stabilizers include 2,2,4-trimethyl-1,2-dihydroquinoline (RD), 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline At least one of porphyrin (AW) and 2-mercaptobenzimidazole (MB). The vulcanization accelerator comprises 2-thiol benzothiazole, dibenzothiazole disulfide, tetramethylthiuram monosulfide, tetramethylthiuram disulfide, tetraethylthiuram disulfide, N-ring At least one of hexyl-2-benzothiazolylsulfenamide, N,N-dicyclohexyl-2-phenylthiazolylsulfenamide, bismaleimide, and ethylenethiourea.

The crosslinking system comprises a crosslinking agent, which may further comprise at least one of a co-crosslinking agent and a vulcanization accelerator.

The Mooney viscosity ML (1+4) of the ethylene propylene rubber used is preferably 20 to 50 at 125 ° C, and the ethylene content is preferably 45% to 60%.

The Mooney viscosity ML (1+4) of the ethylene propylene diene rubber used is preferably 20 to 100, more preferably 20 to 80, the ethylene content is preferably 50% to 75%, and the third monomer is 5-ethylene-2. - norbornene, 5-vinyl-2-norbornene or dicyclopentadiene, the third monomer content being from 1% to 7%.

The branched polyethylene used can be obtained by catalyzing the homopolymerization of ethylene by a (α-diimine) nickel catalyst under the action of a cocatalyst. The structure, synthesis method and method for preparing branched polyethylene by using the (α-diimine) nickel catalyst are disclosed in the prior art, and can be used but are not limited to the following documents: CN102827312A, CN101812145A, CN101531725A, CN104926962A, US6103658, US6660677.

The characteristics of branched polyethylene are: branching degree is 60-130 branches/1000 carbons, weight average molecular weight is 66,000-518,000, Mooney viscosity ML(1+4) 125°C is 6-102, wherein The degree of branching is measured by nuclear magnetic resonance spectroscopy, and the molar percentages of various branches are measured by nuclear magnetic carbon spectroscopy.

The details are as follows:

Rubber performance test method:

1. Hardness test: According to the national standard GB/T 531.1-2008, the test is carried out with a hardness tester, and the test temperature is room temperature;

2, tensile strength, elongation at break performance test: in accordance with the national standard GB/T528-2009, using an electronic tensile testing machine for testing, the tensile speed is 500mm / min, the test temperature is 23 ± 2 ° C, the sample is type 2 Dumbbell sample

3, tear strength test: in accordance with the national standard GB/T529-2008, using an electronic tensile test machine for testing, the tensile speed is 500mm / min, the test temperature is 23 ± 2 ° C, the sample is a rectangular sample;

4, compression permanent deformation test: in accordance with the national standard GB/T7759-1996, using a compression permanent deformation device for testing, type B, the compression is 25%, the test temperature is 70 ° C;

5, Mooney viscosity test: in accordance with the national standard GB/T1232.1-2000, with Mooney viscosity meter for testing, the test temperature is 125 ° C, preheat 1 minute, test 4 minutes;

6, hot air accelerated aging test: in accordance with the national standard GB/T3512-2001, in the heat aging test chamber, the test conditions are 150 ° C × 72h;

7. Positive curing time Tc90 test: According to the national standard GB/T16584-1996, it is carried out in a rotorless vulcanizer, and the test temperature is 160 °C.

The vulcanization conditions of the following Examples 1 to 29 and Comparative Examples 1 to 6 were uniform: temperature: 160 ° C; pressure: 16 MPa; time was Tc90 + 2 min.

A partial field of application in which the rubber composition of the present invention can be used will be disclosed in the following examples, and the vulcanizate properties of the rubber composition are tested and analyzed.

Example 1:

The branched polyethylene used was numbered PER-6.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 50 rpm, add 50 parts of ethylene propylene diene rubber and 50 parts of branched polyethylene for 90 seconds; then add 5 parts of oxidation. Zinc and 1 part stearic acid, mixing for 1 minute; adding 50 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP), 5 parts The cross-linking agent zinc methacrylate and 0.2 parts of the cross-linking agent sulfur were mixed for 2 minutes, and the rubber was discharged, and the mixture was thinly passed on an open mill with a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm. Park for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

The rubber composition of this embodiment can be used for the rubber sheet of the plate bridge support.

Example 2:

The number of branched polyethylene is PER-6.

The rubber composition processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 50 rpm, and add 100 parts of branched polyethylene for pre-pressing and kneading for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 50 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP), 5 parts of cross-linking agent zinc methacrylate And 0.2 parts of the cross-linking agent sulfur, mixing for 2 minutes and then discharging the glue. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Comparative Example 1:

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 50 rpm, and add 100 parts of EPDM rubber for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. , mixing for 1 minute; adding 50 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP), 5 parts of cross-linking agent methacrylic acid Zinc and 0.2 parts of the crosslinking agent sulfur, after 2 minutes of mixing, the rubber was discharged, and the mixture was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 3:

The branched polyethylene was numbered PER-5.

The rubber composition processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 50 rpm, add 70 parts of ethylene propylene diene rubber and 30 parts of branched polyethylene for 90 seconds; then add 5 parts of oxidation. Zinc and 1 part stearic acid, mixing for 1 minute; adding 65 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP) and 1 part The cross-linking agent, triallyl isocyanurate (TAIC), was kneaded for 2 minutes, and the rubber was discharged on a mill with a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm. Park for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 4:

The branched polyethylene was numbered PER-5.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the mixer to 90 ° C, the rotor speed to 50 rpm, add 20 parts of ethylene propylene diene rubber, 30 parts of ethylene propylene diene monomer and 50 parts of prepolymerized polyethylene. 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid, mix for 1 minute; add 65 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR2280, mix for 3 minutes; finally add 3 parts of cross-linking agent Propylene (DCP) and 1 part of the cross-linking agent, triallyl isocyanurate (TAIC), after 2 minutes of mixing, the rubber was discharged, and the mixture was thinned on an open mill with a roll temperature of 60 ° C. A sheet having a thickness of about 2.5 mm was obtained and parked for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 5:

The branched polyethylene was numbered PER-5.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the mixer to 90 ° C, the rotor speed to 50 rpm, add 30 parts of EPDM rubber and 70 parts of branched polyethylene for 90 seconds; then add 5 parts of oxidation. Zinc and 1 part stearic acid, mixing for 1 minute; adding 65 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP) and 1 part The cross-linking agent, triallyl isocyanurate (TAIC), was kneaded for 2 minutes, and the rubber was discharged on a mill with a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm. Park for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Comparative Example 2:

EPDM rubber is used as the rubber matrix.

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 50 rpm, and add 100 parts of EPDM rubber for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. , mixing for 1 minute; adding 65 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP) and 1 part of cross-linking agent triene The base isocyanurate (TAIC) was degreased after 2 minutes of kneading, and the kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

The performance test data of Examples 1 to 5 and Comparative Examples 1 and 2 are as follows:

Example 6

The bridge rubber expansion device produced by the extrusion method uses ethylene propylene diene monomer and branched polyethylene as the rubber base, and the branched polyethylene is PER-10.

The processing steps of the rubber expansion compound are as follows:

(1) Mixing: set the temperature of the mixer to 90 ° C, the rotor speed to 50 rpm, add 90 parts of EPDM rubber and 10 parts of branched polyethylene for 90 seconds; then add 5 parts of oxidation. Zinc, 7 parts of calcium oxide and 1 part of stearic acid, mixing for 1 minute; adding 90 parts of carbon black N550, 15 parts of calcium carbonate and 60 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent peroxidation Diisopropylbenzene (DCP) and 0.3 parts of cross-linking agent sulfur, after 2 minutes of mixing, the rubber is discharged, and the rubber compound is thinly passed on an open mill with a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm. 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 7

The branched polyethylene was numbered PER-9.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 50 rpm, add 70 parts of ethylene propylene diene rubber and 30 parts of branched polyethylene for 90 seconds; then add 5 parts of oxidation. Zinc, 7 parts of calcium oxide and 1 part of stearic acid, mixing for 1 minute; adding 90 parts of carbon black N550, 15 parts of calcium carbonate and 60 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent peroxidation Diisopropylbenzene (DCP) and 0.3 parts of cross-linking agent sulfur, after 2 minutes of mixing, the rubber is discharged, and the rubber compound is thinly passed on an open mill with a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm. 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 8

The branched polyethylene was numbered PER-5.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 50 rpm, and add 100 parts of branched polyethylene pre-pressed for 90 seconds; then add 5 parts of zinc oxide, 7 parts of calcium oxide and 1 Stearic acid, mixing for 1 minute; adding 90 parts of carbon black N550, 15 parts of calcium carbonate and 60 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP) and 0.3 parts of the crosslinking agent sulfur was mixed, and the rubber was discharged after 2 minutes of kneading. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Comparative Example 3:

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 50 rpm, add 100 parts of EPDM rubber and pre-press and knead for 90 seconds; then add 5 parts of zinc oxide, 7 parts of calcium oxide and 1 part stearic acid, mixing for 1 minute; adding 90 parts of carbon black N550, 15 parts of calcium carbonate and 60 parts of paraffin oil SUNPAR2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP) And 0.3 parts of the cross-linking agent sulfur, after 2 minutes of kneading, the rubber was discharged, and the kneaded rubber was thinly passed on an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 9

The branched polyethylene was numbered PER-4.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, add 80 parts of ethylene propylene diene rubber and 20 parts of branched polyethylene for 90 seconds; then add 5 parts of oxidation. Zinc, 1 part stearic acid and 2 parts of antioxidant 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD), kneaded for 1 minute; added 50 parts of carbon black N330, 10 parts Calcium carbonate, 5 parts of paraffin oil SUNPAR2280 and 4 parts of coumarone resin, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP) and 0.3 parts of cross-linking agent sulfur, mixing for 2 minutes After the rubber was dispensed, the rubber compound was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 10:

The branched polyethylene was numbered PER-4.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, add 50 parts of ethylene propylene diene rubber and 50 parts of branched polyethylene for 90 seconds; then add 5 parts of oxidation. Zinc, 1 part stearic acid and 2 parts of antioxidant RD, mixing for 1 minute; adding 50 parts of carbon black N330, 10 parts of calcium carbonate, 5 parts of paraffin oil SUNPAR 2280 and 4 parts of coumarone resin, mixing for 3 minutes; Add 3 parts of cross-linking agent dicumyl peroxide (DCP) and 0.3 parts of cross-linking agent sulfur, knead for 2 minutes, then drain the rubber, and the mixture is thinned on an open mill with a roll temperature of 60 ° C. A sheet of thickness of about 2.5 mm is parked for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 11

The branched polyethylene was numbered PER-4.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide, 1 part of stearic acid and 2 parts of antioxidant RD, mixing for 1 minute; adding 50 parts of carbon black N330, 10 parts of calcium carbonate, 5 parts of paraffin oil SUNPAR 2280 and 4 parts of coumarone resin, mixing for 3 minutes; finally adding 3 parts of cross-linking agent peroxidation Diisopropylbenzene (DCP) and 0.3 parts of cross-linking agent sulfur, after 2 minutes of mixing, the rubber is discharged, and the rubber compound is thinly passed on an open mill with a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm. 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 12

The branched polyethylenes were numbered PER-1 and PER-7.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, add 30 parts of PER-1 and 70 parts of PER-7 pre-pressure mixing for 90 seconds; then add 5 parts of zinc oxide, 1 Stearic acid and 2 parts of antioxidant RD, mixing for 1 minute; adding 50 parts of carbon black N330, 10 parts of calcium carbonate, 5 parts of paraffin oil SUNPAR 2280 and 4 parts of coumarone resin, mixing for 3 minutes; finally adding 3 parts The cross-linking agent dicumyl peroxide (DCP) and 0.3 parts of the cross-linking agent sulfur, after 2 minutes of mixing, the rubber is discharged, and the rubber compound is thinned on the open mill with a roll temperature of 60 ° C to obtain about 2.5 mm. The thickness of the sheet is parked for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Comparative Example 4:

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, add 100 parts of EPDM rubber for 90 seconds, and then add 5 parts of zinc oxide and 1 part of stearic acid. Mix with 2 parts of antioxidant RD for 1 minute; add 50 parts of carbon black N330, 10 parts of calcium carbonate, 5 parts of paraffin oil SUNPAR 2280 and 4 parts of coumarone resin, mix for 3 minutes; finally add 3 parts of crosslinker Dicumyl oxide (DCP) and 0.3 parts of co-crosslinking agent sulfur, after 2 minutes of mixing, the rubber was discharged, and the rubber compound was thinly passed through an open mill with a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm. Park for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

The performance test data of Examples 6 to 12 and Comparative Examples 3 and 4 are as follows:

Example 13

The branched polyethylene was numbered PER-8.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, add 50 parts of ethylene propylene diene rubber and 50 parts of branched polyethylene for 90 seconds; then add 5 parts of oxidation. Zinc and 1 part stearic acid, mixing for 1 minute; adding 75 parts of carbon black N330 and 20 parts of hydrogenated rosin, mixing for 3 minutes; finally adding 3.5 parts of cross-linking agent dicumyl peroxide (DCP), 3 parts of N , N'-m-phenylene bismaleimide and 1 part of a cross-linking agent for the ruthenium dioxime, after 2 minutes of mixing, the rubber is discharged, and the rubber mixture is thinned on an open mill with a roll temperature of 60 ° C. A sheet having a thickness of about 2.5 mm was obtained and parked for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

The rubber composition can be used to produce a rubber sleeper pad.

Example 14

The branched polyethylenes used were numbered PER-2 and PER-8.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, add 80 parts of PER-8 and 20 parts of PER-2 pre-pressed for 90 seconds; then add 5 parts of zinc oxide and 1 Stearic acid, mixing for 1 minute; adding 75 parts of carbon black N330 and 20 parts of hydrogenated rosin, mixing for 3 minutes; finally adding 3.5 parts of cross-linking agent dicumyl peroxide (DCP), 3 parts N, N' - m-phenylene bismaleimide and 1 part of a co-crosslinking agent for the ruthenium dioxime, after 2 minutes of kneading, the rubber is discharged, and the kneaded rubber is thinly passed on an open mill having a roll temperature of 60 ° C to obtain 2.5 mm. The left and right thickness sheets are parked for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Comparative Example 5:

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, add 100 parts of EPDM rubber for 90 seconds, and then add 5 parts of zinc oxide and 1 part of stearic acid. , mixing for 1 minute; adding 75 parts of carbon black N330 and 20 parts of hydrogenated rosin, mixing for 3 minutes; finally adding 3.5 parts of cross-linking agent dicumyl peroxide (DCP), 3 parts of N, N'-m-phenylene The bismaleimide and 1 part of the co-crosslinking agent are used to disperse the bismuth, and the rubber is discharged after 2 minutes of kneading. The kneaded rubber is thinly passed on an open mill with a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm. , park for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 15

The branched polyethylene used was numbered PER-7.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 125 parts of carbon black N330, 80 parts of paraffin oil SUNPAR 2280 and 5 parts of polyethylene wax, mixing for 3 minutes; finally adding 4 parts of cross-linking agent dicumyl peroxide (DCP) and 1 part of help The combined triallyl isocyanurate (TAIC), after 2 minutes of mixing, the rubber is discharged, and the rubber mixture is thinly passed on an open mill with a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and parked 20 hour.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 16:

The branched polyethylene used was numbered PER-4.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 45 parts of carbon black N330, 5 parts of paraffin oil SUNPAR 2280 and 3 parts of coumarone resin, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP), 1 part of help The cross-linking agent, triallyl isocyanurate (TAIC), and 0.3 parts of the cross-linking agent, sulfur, were mixed for 2 minutes and then discharged. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 17

The branched polyethylene used was numbered PER-6.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 10 parts of zinc oxide, 1 part of antioxidant RD and 1 part stearic acid, mixing for 1 minute; adding 80 parts of carbon black N550 and 100 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP), 0.5 parts of N- Cyclohexyl-2-benzothiazole sulfenamide (CZ), 1.25 parts of tetramethylthiuram disulfide (TT) and 0.3 parts of a cross-linking agent sulphur were mixed for 2 minutes and then degreased. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 18

The branched polyethylene used was numbered PER-6.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 65 parts of carbon black N330 and 45 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP) and 2 parts of cross-linking agent dimethacrylic acid Ethylene glycol ester, glued after 2 minutes of mixing. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 19

The branched polyethylene used was numbered PER-3.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 60 parts of carbon black N550, 80 parts of calcium carbonate and 120 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 1 part of cross-linking agent dicumyl peroxide (DCP), 0.3 parts of cross-linking Triallyl isocyanurate (TAIC), 0.5 part crosslinker sulfur, 1 part N-cyclohexyl-2-benzothiazole sulfenamide (CZ) and 0.8 part tetramethyl quaternary ammonium disulfide (TMTD), after 2 minutes of kneading, the rubber was discharged, and the rubber mixture was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 20

The branched polyethylene used was numbered PER-5.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 50 parts of carbon black N330, 60 parts of carbon black N550 and 240 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 8 parts of cross-linking agent dicumyl peroxide (DCP), 2 parts of help The combined triallyl isocyanurate (TAIC) and 8 parts of the cross-linking agent 1,2-polybutadiene were mixed for 2 minutes and then discharged. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

The performance test data of Examples 13-20 and Comparative Example 5 are as follows:

Example 21:

The branched polyethylene used was numbered PER-4.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, add 100 parts of branched polyethylene and 1 part of stearic acid pre-pressed for 90 seconds; then add 30 parts of carbon black N550 Mix with 5 parts of paraffin oil SUNPAR2280 for 3 minutes; finally add 4 parts of cross-linking dicumyl peroxide (DCP), mix for 2 minutes and then drain. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 22

The branched polyethylene used was numbered PER-4.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 120 parts of carbon black N550, 80 parts of calcium carbonate and 180 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 10 parts of cross-linking agent dicumyl peroxide (DCP), 3 parts of cross-linking The triallyl isocyanurate (TAIC) and 7 parts of the cross-linking agent 1,2-polybutadiene were mixed for 2 minutes and then discharged. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 23

The branched polyethylene used was numbered PER-7.

The processing steps of the rubber composition are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 30 parts of carbon black N330, 50 parts of carbon black N550 and 5 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 3.5 parts of cross-linking dicumyl peroxide (DCP), mixing for 2 minutes Rear glue. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 24:

The branched polyethylene used was numbered PER-6.

The processing steps are as follows:

(1) Mixing: set the temperature of the mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene pre-pressed for 90 seconds; then add 6 parts of zinc oxide, 2 parts of antioxidant RD and 1 part stearic acid, mixing for 1 minute; adding 55 parts of carbon black N330, 5 parts of paraffin oil SUNPAR 2280 and 5 parts of coumarone resin, mixing for 3 minutes; finally adding 4 parts of cross-linking agent dicumyl peroxide ( DCP), 1.5 parts of the cross-linking agent triallyl isocyanurate (TAIC), 8 parts of the cross-linking agent zinc methacrylate and 0.3 parts of the cross-linking agent sulfur, and the mixture was degreased after 2 minutes of mixing. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 25

The branched polyethylene used was numbered PER-5.

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 100 parts of carbon black N550 and 75 parts of paraffin oil SUNPAR 2280, mixing for 3 minutes; finally adding 2 parts of cross-linking agent dicumyl peroxide (DCP), 1 part of cross-linking agent triallyl Isocyanurate (TAIC) and 0.2 parts of the cross-linking agent sulfur were mixed and mixed for 2 minutes. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 26:

The branched polyethylene used was numbered PER-4.

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 50 parts of carbon black N550 and 5 parts of polyethylene wax, mixing for 3 minutes; finally adding 3.5 parts of cross-linking agent dicumyl peroxide (DCP), 1 part of cross-linking agent triallyl Isocyanurate (TAIC), glued after 2 minutes of mixing. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

The performance test data of Examples 21 to 26 are as follows:

Example 27:

The branched polyethylene used was numbered PER-5.

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 70 parts of carbon black N330, 30 parts of carbon black N550, 40 parts of paraffin oil SUNPAR 2280 and 5 parts of coumarone resin, mixing for 3 minutes; finally adding 4 parts of cross-linking agent dicumyl peroxide ( DCP), 1 part of the cross-linking agent triallyl isocyanurate (TAIC) and 0.3 parts of the cross-linking agent sulfur, which were mixed for 2 minutes and then discharged. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Example 28

The branched polyethylene used was numbered PER-5.

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 120 parts of carbon black N330, 30 parts of talc and 105 paraffin oil SUNPAR2280, mixed for 3 minutes; finally added 5 parts of cross-linking agent dicumyl peroxide (DCP) and 2 parts of cross-linking agent triallyl isocyanurate (TAIC), mixing 2 Dispense after a minute. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

Comparative Example 6:

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, add 100 parts of EPDM rubber for 90 seconds, and then add 5 parts of zinc oxide and 1 part of stearic acid. , mixing for 1 minute; adding 70 parts of carbon black N330, 30 parts of carbon black N550, 40 parts of paraffin oil SUNPAR 2280 and 5 parts of coumarone resin, mixing for 3 minutes; finally adding 4 parts of cross-linking agent dicumyl peroxide (DCP), 1 part of the cross-linking agent triallyl isocyanurate (TAIC) and 0.3 parts of the cross-linking agent sulfur, which were mixed for 2 minutes and then discharged. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

The performance test data of Examples 27, 28 and Comparative Example 6 are as follows:

Example 29

The branched polyethylene used was numbered PER-4.

The processing steps are as follows:

(1) Mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed to 40 rpm, and add 100 parts of branched polyethylene to pre-press and knead for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid. Mixing for 1 minute; adding 40 parts of carbon black N330, 60 parts of barium sulfate, 10 parts of paraffin oil SUNPAR 2280 and 8 parts of polyethylene wax, mixing for 3 minutes; finally adding 7 parts of cross-linking dicumyl peroxide (DCP) After 2 minutes of mixing, the glue is discharged. The kneaded rubber was thinly passed through an open mill having a roll temperature of 60 ° C to obtain a sheet having a thickness of about 2.5 mm, and was left to stand for 20 hours.

(2) After the vulcanization, the test was carried out for 16 hours.

The invention also provides various applications of the above rubber composition, such as the production and processing of bridge rubber expansion device, rubber sleeper pad, bridge plate rubber bearing, basin rubber bearing, rubber steel plate combined telescopic device, rubber fender , rubber water stop belt, vehicle shock absorption bearing, rubber roller, kind of high temperature resistant V-ribbed belt, wiper strip, sealing ring, waterproof coil, etc., the specific implementation is as follows:

Example 30:

The processing steps of a bridge plate rubber bearing are as follows:

The bridge plate rubber bearing comprises a steel plate and a rubber sheet layer, and each layer of the rubber sheet and the steel plate are pressed and vulcanized by a coating adhesive to be bonded together, and the rubber composition used in the rubber sheet layer in the embodiment is pressed. The composition and ratio described in Example 2 were weighed and kneaded:

(1) Rubber mixing process: set the temperature of the mixer to 90 ° C, the rotor speed is 50 rpm, add 100 parts of branched polyethylene pre-pressed for 90 seconds; then add 5 parts of zinc oxide and 1 part of stearin Acid, knead for 1 minute; add 50 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR2280, mix for 3 minutes; finally add 3 parts of cross-linking agent dicumyl peroxide (DCP), 5 parts of cross-linking agent methyl Zinc acrylate and 0.2 parts of the cross-linking agent sulphur were mixed for 2 minutes and then discharged. The open mill is thinned, parked and tested. After numbering, refining, and calendering, the semi-finished film is punched into the required specifications for use in the vulcanization process;

(2) Vulcanization process: the film and the surface-treated and coated adhesive steel plate are laminated and synthesized according to the process requirements, and then loaded into the preheated mold, and then vulcanized into a flat vulcanizing machine, and the vulcanization temperature is 160 ° C. , steam pressure 0.6MPa, time is 25 minutes;

Example 31:

The processing steps of a bridge plate rubber bearing are as follows:

The bridge plate rubber bearing comprises a steel plate, a polytetrafluoroethylene plate and a rubber sheet layer, and each layer of the rubber sheet is pressed and vulcanized by a coating adhesive between the steel plate and the polytetrafluoroethylene plate to be bonded into one whole. The rubber composition for the rubber sheet layer in this example was weighed and kneaded according to the composition and ratio described in Example 2:

(1) Rubber mixing process: set the temperature of the internal mixer to 90 ° C, the rotor speed is 50 rpm, add 100 parts of branched polyethylene PER-6 pre-pressure mixing for 90 seconds; then add 5 parts of zinc oxide and 1 Stearic acid, mixing for 1 minute; adding 50 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR2280, mixing for 3 minutes; finally adding 3 parts of cross-linking agent dicumyl peroxide (DCP), 5 parts of cross-linking The zinc methacrylate and 0.2 parts of the crosslinking agent sulfur were mixed and the rubber was discharged after 2 minutes. The open mill is thinned, parked and tested. After numbering, refining, and calendering, the semi-finished film is punched into the required specifications for use in the vulcanization process;

(2) Vulcanization process: the film and the surface-treated and coated adhesive steel plate and the polytetrafluoroethylene plate are sequentially laminated according to the process requirements, and then loaded into the preheated mold, and then vulcanized into the flat vulcanizing machine. , the vulcanization temperature is 160 ° C, the steam pressure is 0.6 MPa, and the time is 25 minutes;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the finished rubber bearing is taken out, cooled and parked and trimmed, and a rubber bearing for a simple bridge suitable for a large span structure is obtained.

Example 32:

The basin type rubber support in this embodiment comprises an upper support plate, a stainless steel plate, a polytetrafluoroethylene plate, an intermediate steel plate, a seal ring, a rubber bearing plate, a lower support plate and a support anchor. The rubber bearing plate in this embodiment is the same rubber composition as in Example 5, and the processing steps are as follows:

(1) Rubber mixing process: set the temperature of the internal mixer to 90 ° C, the rotor speed is 50 rpm, add 30 parts of EPDM rubber and 70 parts of branched polyethylene PER-5 pre-pressure mixing for 90 seconds; Then add 5 parts of zinc oxide and 1 part of stearic acid, mix for 1 minute; add 65 parts of carbon black N330 and 5 parts of paraffin oil SUNPAR 2280, mix for 3 minutes; finally add 3 parts of cross-linking agent dicumyl peroxide ( DCP) and 1 part of the cross-linking agent, triallyl isocyanurate (TAIC), after 2 minutes of mixing, the rubber is discharged, and the open mill is thinned, placed, and tested;

(2) vulcanization process: using mold vulcanization, vulcanization temperature 160 ° C, steam pressure 0.6 MPa, vulcanization time 25 minutes;

(3) Cooling parking, trimming and finishing to obtain a rubber bearing plate.

The rubber bearing plate is assembled with other components to obtain a basin rubber bearing.

Example 33:

A rubber expansion body for a bridge rubber expansion device is obtained by an extrusion production process, and the specific steps are as follows:

(1) Kneading: The rubber elastic body described in the present embodiment was the rubber composition described in Example 8, and the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 50 rpm, and 100 parts of branched polyethylene PER was added. -5 pre-compression mixing for 90 seconds; then adding 5 parts of zinc oxide, 7 parts of calcium oxide and 1 part of stearic acid, mixing for 1 minute; adding 90 parts of carbon black N550, 15 parts of calcium carbonate and 60 parts of paraffin oil SUNPAR 2280, The mixture was kneaded for 3 minutes; finally, 3 parts of cross-linking agent dicumyl peroxide (DCP) and 0.3 parts of the cross-linking agent sulfur were added, and the mixture was kneaded for 2 minutes and then discharged. The open mill is thinned, parked and tested;

(2) Extrusion and vulcanization: The extrusion vulcanization process should adopt vacuum pumping extruder. The temperature of the extruder is set to 90~100 °C, the screw temperature is 70-80 °C, and the head pressure should be controlled at 15-20 MPa. The output speed is 25~30 rev/min, and the salt bath vulcanization process is adopted. The temperature of the spray section is 250 °C, the temperature of the dipping section is 220 °C, the temperature of the immersion section is 220 °C, the transmission speed is 35~45 m/min, and the cooling section Temperature 25 ~ 30 ° C;

(3) Cooling, trimming, inspection, and obtaining finished products.

Example 34:

A rubber expansion body for a bridge rubber expansion device is obtained by a molding process, and the specific steps are as follows:

(1) Kneading and molding: The rubber elastic body described in the present embodiment was the rubber composition described in Example 11, and the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 40 rpm, and 100 parts of branched polyg were added. Ethylene PER-4 pre-compression mixing for 90 seconds; then adding 5 parts of zinc oxide, 1 part of stearic acid and 2 parts of antioxidant RD, mixing for 1 minute; adding 50 parts of carbon black N330, 10 parts of calcium carbonate, 5 parts of paraffin The oil SUNPAR 2280 and 4 parts of coumarone resin were mixed for 3 minutes; finally, 3 parts of cross-linking agent dicumyl peroxide (DCP) and 0.3 parts of cross-linking agent sulfur were added, and the mixture was mixed for 2 minutes and then discharged. The open mill is thinned, parked and tested. Refining the film and weighing it.

(2) Molding vulcanization: vulcanization temperature 160 ° C, steam pressure 0.6 MPa, vulcanization time 25 minutes.

(3) Cooling, trimming, inspection, and obtaining finished products.

Example 35:

The processing steps of a rubber steel plate combined telescopic device are as follows:

(1) Mixing and molding: the rubber part was the rubber composition described in Example 11, the temperature of the internal mixer was set to 90 ° C, the rotor speed was 40 rpm, and 100 parts of branched polyethylene PER-4 was pre-compressed. 90 seconds; then add 5 parts of zinc oxide, 1 part of stearic acid and 2 parts of antioxidant RD, mixing for 1 minute; add 50 parts of carbon black N330, 10 parts of calcium carbonate, 5 parts of paraffin oil SUNPAR 2280 and 4 parts of Gu Ma Long resin, kneaded for 3 minutes; finally, 3 parts of cross-linking agent dicumyl peroxide (DCP) and 0.3 parts of cross-linking agent sulfur were added, and the mixture was mixed for 2 minutes and then discharged. The open mill is thinned, parked and tested. Refining the film, weighing and forming;

(2) Vulcanization process: the film and the surface-treated and coated adhesive steel sheet are laminated according to the process requirements, and then loaded into the preheated mold, and then vulcanized into a flat vulcanizing machine, and the vulcanization temperature is 160 ° C. The steam pressure is 0.6 MPa and the time is 25 minutes;

Example 36:

The processing steps of a rubber sleeper pad are as follows:

(1) Kneading: The rubber composition described in Example 14 was used, and the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 40 rpm, and 80 parts of PER-8 and 20 parts of PER-1 pre-compression kneading were added. Second; then add 5 parts of zinc oxide and 1 part of stearic acid, mix for 1 minute; add 75 parts of carbon black N330 and 20 parts of hydrogenated rosin, mix for 3 minutes; finally add 3.5 parts of cross-linking dicumyl peroxide (DCP), 3 parts of N, N'-m-phenylene bismaleimide and 1 part of a co-crosslinking agent for the ruthenium dioxime, which was kneaded for 2 minutes and then discharged. After being parked and tested, the mixture is heat-treated, and then the sheet is cut to a desired thickness and cut into a desired shape for use in the vulcanization process.

(2) Molding vulcanization: the vulcanization temperature was 160 ° C, the vapor pressure was 0.6 MPa, and the time was 25 minutes.

(3) Trimming, inspection, and obtaining finished products.

Example 37:

A rubber fender processing step is as follows:

(1) kneading: using the rubber composition described in Example 15, setting the temperature of the internal mixer to 90 ° C, the rotor rotation speed of 40 rpm, adding 100 parts of branched polyethylene PER-7 pre-pressure mixing for 90 seconds; Then add 5 parts of zinc oxide and 1 part of stearic acid, mix for 1 minute; add 125 parts of carbon black N330, 80 parts of paraffin oil SUNPAR 2280 and 5 parts of polyethylene wax, mix for 3 minutes; finally add 4 parts of cross-linking agent Dicumyl oxide (DCP) and 1 part of the co-crosslinking agent, triallyl isocyanurate (TAIC), were mixed for 2 minutes and then discharged.

(2) Molding and vulcanization: The mixing rubber is put into the cavity, and then the mold is closed, the rubber is fully flowed, exhausted, closed, and vulcanized. The vulcanization temperature was 160 ° C and the time was 25 minutes.

Example 38:

The processing steps of a rubber waterstop are as follows:

(1) Mixing and molding: The rubber composition described in Example 16 was used, and the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 40 rpm, and 100 parts of branched polyethylene PER-4 was pre-compressed and kneaded. 90 seconds; then add 5 parts of zinc oxide and 1 part of stearic acid, mix for 1 minute; add 45 parts of carbon black N330, 5 parts of paraffin oil SUNPAR2280 and 3 parts of coumarone resin, mix for 3 minutes; finally add 3 parts The cross-linking agent dicumyl peroxide (DCP), 1 part of the cross-linking agent triallyl isocyanurate (TAIC) and 0.3 parts of the cross-linking agent sulfur were mixed for 2 minutes and then discharged. Parking inspection, refining, and weighing.

(3) Trimming finishing, inspection, and obtaining finished products.

Example 39:

The processing steps of a steel belt rubber waterstop are as follows:

(1) Rubber part kneading and molding: The rubber composition described in Example 16 was used, and the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 40 rpm, and 100 parts of branched polyethylene PER-4 preload was added. Mixing for 90 seconds; then adding 5 parts of zinc oxide and 1 part of stearic acid, mixing for 1 minute; adding 45 parts of carbon black N330, 5 parts of paraffin oil SUNPAR 2280 and 3 parts of coumarone resin, mixing for 3 minutes; 3 parts of cross-linking agent dicumyl peroxide (DCP), 1 part of cross-linking agent triallyl isocyanurate (TAIC) and 0.3 parts of cross-linking agent sulfur, and the mixture was mixed for 2 minutes and then discharged. Parking inspection, refining, and weighing.

(2) Vulcanization process: the film and the surface-treated and coated adhesive steel sheet are laminated according to the process requirements, and then loaded into the preheated mold, and then vulcanized into a flat vulcanizer, and the vulcanization temperature is 160 ° C. The steam pressure is 0.6 MPa and the time is 25 minutes.

(3) Trimming finishing, inspection, and obtaining finished products.

Example 40:

The processing steps of a vehicle shock absorbing support are as follows:

(1) Rubber part kneading and molding: The rubber composition described in Example 17 was used, and the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 40 rpm, and 100 parts of branched polyethylene pre-pressure kneading was added. Second; then add 10 parts of zinc oxide, 1 part of antioxidant RD and 1 part of stearic acid, mix for 1 minute; add 80 parts of carbon black N550 and 100 parts of paraffin oil SUNPAR2280, mix for 3 minutes; finally add 3 parts of cross-linking Dicumyl peroxide (DCP), 0.5 parts of N-cyclohexyl-2-benzothiazole sulfenamide (CZ), 1.25 parts of tetramethylthiuram disulfide (TT) and 0.3 parts of cross-linking Sulphur, glued for 2 minutes and then discharged. Parking inspection, refining, and weighing.

(2) Vulcanization process: the rubber material and the surface-treated and coated metal parts are laminated according to the process requirements, and then loaded into the preheated mold, and then vulcanized into a flat vulcanizing machine, and the vulcanization temperature is 160. °C, steam pressure 0.6MPa, time is 25 minutes.

(3) Trimming finishing, inspection, and obtaining finished products.

The damper mount of the present embodiment can be used for high temperature parts such as an engine and an exhaust pipe.

Example 41:

The production and processing steps of a rubber roller are as follows:

(1) Kneading: The rubber composition described in Example 18 was used, and the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 40 rpm, and 100 parts of branched polyethylene PER-6 was pre-pressed and kneaded for 90 seconds. Then add 5 parts of zinc oxide and 1 part of stearic acid, mix for 1 minute; add 65 parts of carbon black N330 and 45 parts of paraffin oil SUNPAR2280, mix for 3 minutes; finally add 3 parts of cross-linking agent dicumyl peroxide (DCP) and 2 parts of co-crosslinking agent ethylene glycol dimethacrylate were mixed for 2 minutes and then discharged. The mixture was allowed to stand on the open mill for 24 hours.

(2) Wrap-wrapping: Put the rubber mixture into the screw extruder, and the film of thickness and width required by the extrusion process. After the film is uniform, start the rotating wrapping machine and wrap the film on the prepared metal roll core. The rubber is wrapped layer by layer until the thickness of the rubberized single side reaches a predetermined thickness, and then 2 to 3 layers of nylon water cloth are wound on the rubber surface to obtain a rubberized rubber roll.

(3) vulcanization tank vulcanization, the rubberized rubber roller is sent to the vulcanization tank, after closing the tank door, steam is vulcanized into the vulcanization tank, and the compressed air valve is opened while steam is introduced, and the compressed air is passed to vulcanize. The pressure in the tank reaches 4.5 to 5 atmospheres in 0.5 hours; the vulcanization procedure is: firstly heat up to 70-80 ° C, keep warm for 2 hours; then heat up to 100-110 ° C, keep warm for 0.5 hours; then heat up to 120-130 ° C, keep warm 0.5 hours; further increase to 135 ~ 140 ° C, heat 8 ~ 10 hours. After the vulcanization is finished, the exhaust valve is opened, the pressure drops, and when the pressure gauge pointer points to zero, the safety pin is opened, and the steam is discharged from the pin hole, and the vulcanization tank is half-opened to lower the temperature until the temperature in the tank is lower than 60 ° C or Pull out the rubber roller when it is equivalent to room temperature;

(4) The vulcanized rubber roller is rough-processed on a lathe, and then finished on a grinding machine for inspection and inspection to obtain a finished product.

Example 42

A high temperature resistant V-ribbed belt, the buffer layer of which uses the rubber composition provided by the invention, and the production processing steps are as follows:

1, mixing:

(1) Compressed layer compound mixing: set the temperature of the internal mixer to 90 ° C, the rotor speed is 50 rpm, add 100 parts of branched polyethylene PER-5 pre-pressure mixing for 90 seconds; add 6 parts of zinc oxide, 1 part stearic acid, 2 parts of antioxidant RD, kneaded for 1 minute; then add 45 parts of carbon black N330, 5 parts of paraffin oil SUNPAR 2280 and 5 parts of coumarone resin to the compound, mix for 3 minutes; then add 60 parts of nylon short fibers of 1 mm length, mixed for 2 minutes; finally added 4 parts of cross-linking agent dicumyl peroxide (DCP), 1.5 parts of cross-linking agent triallyl isocyanurate (TAIC) After 2 minutes of mixing, the glue is discharged. The kneaded rubber was thinly passed on an open mill with a roll temperature of 80 ° C, and was thinned 7 times at a roll gap of 0.5 mm to fully orient the short fibers, and the roll gap was obtained to obtain a sheet thickness of about 2.5 mm and parked for 20 hours. .

(2) buffer layer compound mixing: set the temperature of the mixer to 90 ° C, the rotor speed is 40 rev / min, add 100 parts of branched polyethylene PER-5 pre-pressure mixing for 90 seconds; then add 6 parts of zinc oxide 2 parts of antioxidant RD and 1 part of stearic acid, mixing for 1 minute; adding 55 parts of carbon black N330, 5 parts of paraffin oil SUNPAR 2280 and 5 parts of coumarone resin, mixing for 3 minutes; finally adding 4 parts of crosslinking agent Dicumyl peroxide (DCP), 1.5 parts of cross-linking agent triallyl isocyanurate (TAIC), 10 parts of cross-linking agent zinc methacrylate and 0.3 parts of cross-linking agent sulfur, mixing Discharge the glue after 2 minutes.

2, molding: the use of reverse molding. Firstly, the optical mold is hung on the molding machine, the mold is cleaned, and a small amount of release agent is applied. After it is volatilized, the V-ribbed top cloth is wrapped on the optical mold, and then the buffer rubber is wrapped to correct the tension of the rope, and the winding is smooth. After the strong layer, the buffer rubber is applied, and finally the wedge rubber is wrapped to the outer circumference required by the molding process to obtain a strip.

3. Vulcanization: The strip is sent to the vulcanization section for vulcanization. The vulcanization temperature is 160 ° C, the internal pressure is 0.45-0.55 MPa, the external pressure is 1.0-1.2 MPa, and the vulcanization time is 30 minutes.

4. Post-treatment: After the vulcanization is finished, the mold is cooled and released, and the belt is sent to the cutting process to cut according to the required width. Grinding the back, grinding the wedge, and trimming the product to obtain the finished product.

Example 43

The production and processing steps of a wiper strip are as follows:

(1) Kneading: Using the rubber composition described in Example 25, the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 40 rpm, and 100 parts of branched polyethylene PER-5 was pre-pressed and kneaded for 90 seconds. Then add 5 parts of zinc oxide and 1 part of stearic acid, mix for 1 minute; add 65 parts of carbon black N330 and 45 parts of paraffin oil SUNPAR2280, mix for 3 minutes; finally add 3 parts of cross-linking agent dicumyl peroxide (DCP) and 2 parts of co-crosslinking agent ethylene glycol dimethacrylate were mixed for 2 minutes and then discharged. The mixture was allowed to stand on the open mill for 24 hours.

(2) The rubber compound was injected into a cavity and vulcanized at 160 ° C for 25 minutes to form.

(3) The surface of the vulcanized product is subjected to surface treatment and inspection to obtain a finished product.

Example 44:

The processing steps of a sealing ring are as follows:

(1) Kneading: The rubber composition described in Example 26 was used, and the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 40 rpm, and 100 parts of branched polyethylene PER-4 was pre-pressed and kneaded for 90 seconds. Then adding 5 parts of zinc oxide and 1 part of stearic acid, mixing for 1 minute; adding 50 parts of carbon black N550 and 5 parts of polyethylene wax, mixing for 3 minutes; finally adding 3.5 parts of cross-linking dicumyl peroxide (DCP), 1 part of the cross-linking agent, triallyl isocyanurate (TAIC), and the rubber was discharged after 2 minutes of mixing. On the open mill, the thin film is passed through, the physical property is detected, the rubber material is refining, and the semi-finished product is obtained by extrusion.

(2) Vulcanization: one-stage compression vulcanization: temperature is 160 ° C, vulcanization time is 20 minutes; second-stage oven vulcanization: temperature 150 ° C, time 1 hour.

(3) Trimming, inspection, and obtaining finished products.

Example 45:

The processing steps of a waterproof membrane are as follows:

(1) Kneading: The rubber composition described in Example 27 was used, and the temperature of the internal mixer was set to 90 ° C, the rotor rotation speed was 40 rpm, and 100 parts of branched polyethylene PER-5 was pre-pressed and kneaded for 90 seconds. Then adding 5 parts of zinc oxide and 1 part of stearic acid, mixing for 1 minute; adding 70 parts of carbon black N330, 30 parts of carbon black N550, 40 parts of paraffin oil SUNPAR 2280 and 5 parts of coumarone resin, mixing for 3 minutes; Finally, 4 parts of cross-linking agent dicumyl peroxide (DCP), 1 part of cross-linking agent triallyl isocyanurate (TAIC) and 0.3 parts of cross-linking agent sulfur were added, and the mixture was mixed for 2 minutes. gum. The block rubber is fed into the open mill for mixing, the temperature of the control roller is between 85 and 95 ° C, and the roll distance is controlled to be less than 1 mm, and the thin pass is not less than four times until the surface of the rubber compound is smooth and shiny. Then turn the head and further mix it, make the thin pass no less than four times, adjust the roll distance to not more than 8mm, mix it three times, and obtain the evenly mixed rubber piece with the thickness below 8mm, and cool it to below 50 °C. Stacking

(2) hot refining: the uniformly mixed rubber flakes are heat-treated on the open mill, the control roll temperature is between 85 and 95 ° C, and the roll distance is below 6 mm, until the rubber sheet is smooth and uniform, and then preliminaryly rolled;

Example 46:

An engine cooling system radiator plate rubber sealing strip adopts a process of compression vulcanization and stage vulcanization, and comprises the following steps:

(1) Rubber mixing: set the internal temperature of the mixer to 80 ° C and the rotor speed to 40 rpm, add 100 parts of branched polyethylene PER-5 pre-pressure mixing for 90 seconds; then add 5 parts of zinc oxide, 1 part Stearic acid, 1 part of antioxidant RD and 2 parts of fatty acid derivative mixture WB42, kneaded for 1 minute; 60 parts of carbon black N550, 25 parts of paraffin oil SUNPAR 2280, mixed for 3 minutes; finally added 4 parts of crosslinker Butylperoxydiisopropylbenzene (BIPB), 1 part of the co-crosslinking agent, triallyl isocyanurate (TAIC), and 0.3 parts of the cross-linking agent sulfur were mixed and dispersed for 2 minutes. Parking and testing;

(2) The rubber compound after passing the test is extruded through an extruder, cut into pieces and placed in a mold of a vulcanization apparatus, the vulcanization pressure is 15 MPa, the vulcanization temperature is 180 ° C, and the vulcanization time is preferably 2.5 minutes;

(3) trimming the vulcanized product;

(4) The trimmed product is subjected to two-stage vulcanization at a high temperature. The temperature is 170 ° C, the time is 30 minutes;

(5) Inspect the product and put it into storage after passing the test.

Example 47:

An inner tube whose production process is as follows:

(1) Rubber mixing: set the temperature of the internal mixer to 100 ° C, the rotor speed to 50 rpm, add 100 parts of branched polyethylene PER-5 pre-pressure mixing for 90 seconds; add 5 parts of zinc oxide, 1 part of hard Fatty acid and 3 parts of coumarone resin, mixing for 2 minutes; then adding 60 parts of carbon black N660 and 20 parts of paraffin oil SUNPAR2280 to the compound, mixing for 3 minutes; finally adding 4 parts of cross-linking agent diisopropyl peroxide Benzene (DCP) and 2 parts of co-crosslinking agent N, N'-m-phenylene bismaleimide (HVA-2) were mixed for 2 minutes and then discharged. After the filter is glued, the rubber compound is opened on the open mill and parked for 20 hours.

(2) Extrusion: The extruder temperature was set to 85 ° C, the mouth temperature was set to 115 ° C, and the speed of the conveyor belt was matched with the extrusion speed. Install the valve.

(3) Connector: Use the connector joint and park it.

(4) Inflatable shaping and vulcanization: the first inflated to 70%, stopped for 15 seconds; the second inflated to the fixed size. The vulcanization temperature was 180 ° C, the vapor pressure was 0.9 MPa, and the vulcanization time was 8 minutes. After the vulcanization is completed, it is taken out and cooled.

(5) Inspection, trimming, and obtaining finished inner tube.

Example 48:

A bridge plate type rubber support, wherein the rubber base in the rubber composition is 100 parts of branched polyethylene PER-12, and the remaining components in the rubber composition and the processing technique are the same as those in the embodiment 30.

The rubber compound used in the rubber composition was subjected to compression molding to prepare a test sample, and the test performance was as follows:

Hardness: 65; tensile strength: 27.3 MPa; elongation at break: 446%; compression set (70 ° C × 22 h): 8%.

Example 49

A vehicle shock absorbing support, wherein the rubber matrix in the rubber composition is 70 parts of branched polyethylene PER-10 and 30 parts of branched polyethylene PER-12, the remaining components in the rubber composition and the processing technology and Example 40 is identical.

Hardness: 63; tensile strength: 27.5 MPa; elongation at break: 382%; compression set (70 ° C × 22 h): 9%.

Example 50

A rubber sleeper pad having a rubber base of 100 parts of branched polyethylene PER-11, the remaining components of the rubber composition and the processing technique are the same as those of the embodiment 36.

Hardness: 75; tensile strength: 26.8 MPa; elongation at break: 347%; compression set (70 ° C × 22 h): 9%.

In summary, it can be found by comparison that the rubber composition of the present invention is superior to the prior art ethylene-propylene rubber-based rubber composition in comprehensive physical properties, and can significantly optimize the anti-aging rubber at low cost. The use effect of the product, broaden the application range of anti-aging rubber products.

Claims

A rubber composition, characterized in that the rubber composition comprises, in parts by weight, a rubber matrix and an essential component, the rubber matrix comprising: a content of branched polyethylene a: 0 < a ≤ 100 parts, The content of ethylene propylene rubber b: 0 ≤ b < 100 parts, based on 100 parts by weight of the rubber matrix, the essential components include: 1.5 to 10 parts of a crosslinking agent, 30 to 200 parts of a reinforcing filler, and a plasticizer 5 to 250 parts, wherein the branched polyethylene comprises an ethylene homopolymer having a branching degree of not less than 50 branches/1000 carbons, a weight average molecular weight of not less than 50,000, and a Mooney viscosity of ML (1+4) 125 ° C Not less than 2.
The rubber composition according to claim 1, wherein the content of the branched polyethylene in the 100 parts by weight of the rubber matrix is a: 10 ≤ a ≤ 100 parts; the ethylene propylene rubber and the EPDM The content of rubber b: 0 ≤ b ≤ 90 parts; the branched polyethylene is characterized by: an ethylene homopolymer having a degree of branching of 60 to 130 branches/1000 carbons and a weight average molecular weight of 66,000. 518,000, Mooney viscosity ML (1 + 4) 125 ° C is 6 ~ 102.
The rubber composition according to claim 1, wherein the rubber composition comprises, in parts by weight, a rubber base comprising 100 parts of branched polyethylene, and 100 parts by weight, and a necessary component. In the rubber base, the necessary components include 1.5 to 10 parts of a crosslinking agent, 30 to 200 parts of a reinforcing filler, and 8 to 150 parts of a plasticizer.
The rubber composition according to claim 1, wherein the crosslinking agent comprises at least one of a peroxide crosslinking agent and sulfur, and the peroxide crosslinking agent comprises di-tert-butyl peroxide. Dicumyl peroxide, tert-butyl cumyl peroxide, 1,1-di-tert-butyl peroxide-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2 , 5-di(tert-butylperoxy)hexane, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne-3, bis(tert-butylperoxyisopropyl) At least one of benzene, 2,5-dimethyl-2,5-bis(benzoyl peroxy)hexane, tert-butyl peroxybenzoate, and t-butylperoxy-2-ethylhexyl carbonate Kind.
The rubber composition according to claim 1, wherein the reinforcing filler comprises at least one of carbon black, white carbon, calcium carbonate, talc, calcined clay, magnesium silicate, and magnesium carbonate.
A rubber composition according to claim 1, wherein said plasticizer comprises pine tar, motor oil, naphthenic oil, paraffin oil, coumarone, RX-80, stearic acid, paraffin, liquid At least one of polyisobutylene.
The rubber composition according to claim 1, wherein the rubber composition further comprises an auxiliary component based on 100 parts by weight of the rubber base, the auxiliary component comprising: 0.2 to 10 parts of a co-crosslinking agent, a stabilizer 0.5 to 3 parts, 2 to 15 parts of metal oxide, and 0 to 3 parts of vulcanization accelerator.
The rubber composition according to claim 7, wherein the co-crosslinking agent comprises triallyl cyanurate, triallyl isocyanurate, ethylene glycol dimethacrylate, Ethyl dimethacrylate, triethylene glycol dimethacrylate, triallyl trimellitate, trimethylolpropane trimethacrylate, ethylene glycol dimethacrylate, N, N'- At least one of m-phenylene bismaleimide, N,N'-bis-indenylene acetonate, 1,2-polybutadiene, p-nonane, sulfur, and a metal salt of an unsaturated carboxylic acid.
The rubber composition according to claim 7, wherein the metal oxide is at least one of zinc oxide, magnesium oxide, calcium oxide, lead monoxide, and lead tetraoxide.
The rubber composition according to claim 7, wherein said stabilizer comprises 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 6-ethoxy-2,2 At least one of 4-trimethyl-1,2-dihydroquinoline and 2-mercaptobenzimidazole.
The rubber composition according to claim 7, wherein the vulcanization accelerator comprises 2-thiol benzothiazole, dibenzothiazyl disulfide, tetramethylthiuram monosulfide, and tetrasulfide disulfide. Kethiram, tetraethylthiuram disulfide, N-cyclohexyl-2-benzothiazolyl sulfenamide, N,N-dicyclohexyl-2-phenylthiazolyl sulfenamide, bismaleyl At least one of an imine and an ethylene thiourea.
A method of processing the rubber composition according to any one of claims 1 to 11, comprising the steps of:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, and sequentially adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, and discharging the rubber after mixing. , the rubber compound is thinly passed through the open mill and parked, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator;

(2) Vulcanization: The bottled rubber after filling is filled into the cavity of the preheating mold, and subjected to high temperature pressure vulcanization. After the vulcanization is completed, the vulcanized rubber is obtained by demoulding.
A bridge plate type rubber support comprising a steel sheet and a rubber sheet layer, wherein the rubber sheet layer comprises the rubber composition according to any one of claims 1 to 11.
A bridge plate type rubber support comprising a steel sheet, a polytetrafluoroethylene sheet and a rubber sheet layer, wherein the rubber sheet layer comprises the rubber composition according to any one of claims 1 to 11.
A method for producing a bridge-plate rubber bearing according to claim 14, wherein the bridge-plate rubber bearing is coated with an adhesive between each layer of rubber sheet and the steel sheet and the Teflon sheet. A whole that is bonded after vulcanization, and the production method thereof comprises the following steps:

(1) Rubber mixing process: setting the temperature of the internal mixer and the rotation speed of the rotor, and sequentially adding the components other than the crosslinking system in the rubber composition used for the rubber sheet layer to the internal mixer for mixing; then adding a crosslinking system, After the mixing, the rubber is discharged in the open machine, parked and tested. After numbering, refining and calendering, the film is punched into a semi-finished film of the required specifications for use in the vulcanization process. The crosslinking system comprises a crosslinking agent, and may further comprise at least one of a co-crosslinking agent and a vulcanization accelerator;

(2) Vulcanization process: the film and the surface-treated and coated adhesive steel plate and the polytetrafluoroethylene plate are sequentially stacked according to the process requirements, and then loaded into the preheated mold, and then vulcanized into the flat vulcanizing machine. forming;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the finished rubber bearing is taken out, cooled, parked and trimmed to obtain the finished product.
A basin type rubber support, characterized in that the rubber pressure receiving plate in the pot type rubber holder comprises the rubber composition according to any one of claims 1 to 11.
A method for producing a basin rubber bearing according to claim 16, wherein the basin rubber bearing comprises an upper support plate, a stainless steel plate, a polytetrafluoroethylene plate, an intermediate steel plate, a sealing ring, and a rubber bearing The pressure plate, the lower support plate and the anchor bolt are assembled, and the production method comprises the following steps:

(1) Rubber mixing process: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition used for the rubber bearing plate to the internal mixer for mixing; then adding the crosslinking system After the mixing, the rubber is discharged, and the rubber compound is thinly passed through the open mill, and is parked and tested. The crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator. ;

(2) Vulcanization molding process: the film is loaded into a preheated mold, and then vulcanized into a flat vulcanizer;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the finished rubber bearing is taken out, cooled and parked and trimmed to obtain a rubber bearing plate.

(4) Assembly: The rubber bearing plate is assembled with other components to obtain a basin rubber bearing.
A bridge rubber expansion device characterized in that the rubber expandable body used comprises the rubber composition according to any one of claims 1 to 11.
A method for producing a bridge rubber expansion device according to claim 18, characterized in that the rubber expansion method using the extrusion method comprises the following steps:

(1) Rubber mixing process: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, after mixing Discharging, laminating the rubber in the open mill, parking and testing, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator;

(2) Extrusion and vulcanization: The extrusion vulcanization process should adopt a vacuum extruder, and after the extrusion, a salt bath vulcanization process is adopted, and the vulcanizate is obtained by spraying, dipping, dipping, and cooling.

(3) After trimming, inspection, and obtaining the finished product.
A method for producing a bridge rubber expansion device according to claim 18, wherein the rubber expansion body adopts a molding method comprising the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading After the rubber is glued, the rubber compound is thinned in the open mill, parked and tested, and the film is re-smelted and weighed. The cross-linking system contains a crosslinking agent, and may also contain a crosslinking agent and vulcanization promotion. At least one of the agents;

(2) Molding vulcanization: the formed rubber compound is placed in a mold and vulcanized by a high temperature steam vulcanization process;

(3) Cooling, trimming, inspection, and obtaining finished products.
A rubber steel plate combined type expansion and contraction device characterized in that the rubber expandable body comprises the rubber composition according to any one of claims 1 to 11.
A method of producing a rubber steel plate combined type expansion and contraction device according to claim 21, wherein the production method comprises the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading After the rubber is glued, the rubber compound is thinned in the open mill, parked and tested, and the film is re-smelted and weighed. The cross-linking system contains a crosslinking agent, and may also contain a crosslinking agent and vulcanization promotion. At least one of the agents;

(2) vulcanization process: the film and the surface treated and coated adhesive steel plate are laminated according to the process requirements, and then loaded into the preheated mold, and then enter the flat vulcanizing machine to heat and press vulcanize;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the product is taken out, cooled, parked and trimmed to obtain a finished product.
A rubber sleeper pad characterized by comprising the rubber composition according to any one of claims 1 to 11.
A method of producing the rubber sleeper pad of claim 23, characterized in that the production method comprises the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading The rear rubber is heated and then tested and tested, and then the film is cut to a desired size for the vulcanization process. The cross-linking system contains a crosslinking agent and may also contain a crosslinking agent. And at least one of a vulcanization accelerator;

(2) vulcanization: put the cut rubber into the mold, put the mold into the flat vulcanizing machine, heat and pressure vulcanization;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the product is taken out, cooled, parked and trimmed to obtain a finished product.
A rubber fender characterized in that the compound used comprises the rubber composition according to any one of claims 1 to 11.
A method of producing the rubber fender of claim 25, wherein the production method comprises the steps of:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition used for the rubber sheet layer to the internal mixer for mixing; then adding the crosslinking system, mixing Refining and debinding, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a co-crosslinking agent and a vulcanization accelerator;

(2) Molding and vulcanization: The mixing rubber is put into the cavity, and then the mold is closed, the rubber is fully flowed, exhausted, closed, and vulcanized.

(3) Open the mold, take out the product, trim, inspect, and obtain the finished product.
A rubber waterstop tape comprising the rubber composition according to any one of claims 1 to 11.
A method of producing the rubber waterstop according to claim 27, characterized in that the production method comprises the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading After the rubber is glued, the rubber compound is thinned in the open mill, parked and tested, and the film is re-smelted and weighed. The cross-linking system contains a crosslinking agent, and may also contain a crosslinking agent and vulcanization promotion. At least one of the agents;

(2) vulcanization: put the cut rubber into the mold, put the mold into the flat vulcanizing machine, heat and pressure vulcanization;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the product is taken out, cooled, parked and trimmed to obtain a finished product.
A steel belt rubber waterstop, characterized in that the rubber compound used comprises the rubber composition according to any one of claims 1 to 11.
A method of producing a steel belt rubber waterstop according to claim 29, characterized in that the production method comprises the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading After the rubber is glued, the rubber compound is thinned in the open mill, parked and tested, and the film is re-smelted and weighed. The cross-linking system contains a crosslinking agent, and may also contain a crosslinking agent and vulcanization promotion. At least one of the agents;

(2) vulcanization: the film and the surface-treated and coated adhesive sheet are laminated according to the process requirements, and then loaded into the preheated mold, and then into the flat vulcanizing machine at high temperature and high pressure vulcanization;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the product is taken out, cooled, parked and trimmed to obtain a finished product.
A vibration-damping support for a vehicle, characterized in that the rubber compound used comprises the rubber composition according to any one of claims 1 to 11.
A method of producing a vehicle shock absorbing mount according to claim 31, characterized in that the production method comprises the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading After the rubber is glued, the rubber compound is thinned in the open mill, parked and tested, and the film is re-smelted and weighed. The cross-linking system contains a crosslinking agent, and may also contain a crosslinking agent and vulcanization promotion. At least one of the agents;

(2) vulcanization: the film and the surface-treated and coated metal parts are laminated according to the process requirements, and then loaded into the preheated mold, and then enter the flat vulcanizing machine at high temperature and high pressure vulcanization;

(3) Post-treatment: After the vulcanization is completed, the mold is pulled out and disassembled, the product is taken out, cooled, parked and trimmed to obtain a finished product.
A rubber roller characterized by comprising the rubber composition according to any one of claims 1 to 11.
A method of producing a rubber roller according to claim 33, characterized in that the production method comprises the following steps:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, mixing and arranging a glue, the rubber compound is thinly passed through the open mill, parked and tested, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator;

(2) Wrap-wrapping: Put the rubber mixture into the screw extruder, and the film of thickness and width required by the extrusion process. After the film is uniform, start the rotating wrapping machine and wrap the film on the prepared metal roll core. , wrapping the rubber layer by layer until the thickness of the rubberized single side reaches a predetermined thickness, and then winding 2 to 3 layers of nylon water cloth on the rubber surface to obtain a rubberized rubber roll;

(3) vulcanization tank vulcanization, the rubberized rubber roller is sent to the vulcanization tank, after closing the tank door, steam is vulcanized into the vulcanization tank, and the compressed air valve is opened while steam is introduced, and the compressed air is passed to vulcanize. The pressure in the tank reaches 4.5 to 5 atmospheres in 0.5 hours;

The vulcanization procedure is as follows: firstly, the temperature is raised to 70-80 ° C, and the temperature is kept for 2 hours; then the temperature is raised to 100-110 ° C, and the temperature is kept for 0.5 hours; then the temperature is raised to 120-130 ° C, the temperature is kept for 0.5 hours; and then the temperature is raised to 135-140 ° C, and the temperature is maintained. ~10 hours, the end of vulcanization, open the exhaust valve, the pressure drops, when the pressure gauge pointer points to zero, open the safety pin, wait for the steam in the pin hole to float, half open the vulcanization tank, let the temperature drop, wait for the temperature inside the tank Pulling out the rubber roller at 60 ° C or equivalent to room temperature;

(4) Post-treatment: The vulcanized rubber roller is rough-processed on a lathe, and then finished on a grinding machine for inspection and inspection to obtain a finished product.
A high temperature resistant V-ribbed belt comprising a compression layer and a buffer layer, characterized in that the buffer layer compound comprises the rubber composition according to any one of claims 1 to 11.
A method of producing the high temperature resistant V-ribbed belt of claim 35, characterized in that the production method comprises the following steps:

(1) Rubber kneading: wherein the mixing of the buffer layer rubber is: setting the temperature of the internal mixer and the rotation speed of the rotor, and sequentially adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; Then, the crosslinking system is added, the rubber is mixed after the mixing, and the rubber mixture is thinly passed through the open mill, and is parked and tested. The crosslinking system contains a crosslinking agent, and may also include a crosslinking agent and a vulcanization accelerator. At least one of them;

(2) Molding: The reverse molding method is adopted. First, hang the optical mold on the molding machine, clean the mold, apply a small amount of release agent, and after it is volatilized, wrap the V-ribbed top cloth on the optical mold, and then wrap the buffer layer rubber to correct the tension of the rope. After winding the strength layer, the buffer rubber is applied, and finally the wedge rubber is wrapped to the outer circumference required by the molding process to obtain a strip;

(3) Vulcanization: The vulcanized vulcanization process is used to feed the strip into the vulcanization tank for vulcanization. The vulcanization temperature is 155-175 ° C, the internal pressure is 0.45-0.55 MPa, the external pressure is 1.0-1.2 MPa, and the vulcanization time is 25-30. minute;

(4) Post-treatment: After the vulcanization is finished, the mold is cooled and released, and the belt is sent to the cutting process, and the width is cut according to the required width, the back is rubbed, the wedge is trimmed, and the finished product is obtained after inspection by trimming.
A wiper strip comprising the rubber composition according to any one of claims 1 to 11.
A method of producing a wiper strip according to claim 37, characterized in that the production method comprises the following steps:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, mixing and arranging a glue, the rubber compound is thinly passed through the open mill, parked and tested, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator;

(2) vulcanization: the rubber compound is injected into the cavity and vulcanized under high temperature and high pressure;

(3) Post-treatment: The vulcanized product is subjected to surface treatment and inspection to obtain a finished product.
A seal ring comprising the rubber composition according to any one of claims 1 to 11.
A method of producing the seal of claim 39, characterized in that the production method comprises the following steps:

(1) Rubber mixing and molding: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system and kneading After the rubber is glued, the rubber compound is thinly passed through the open mill, the physical property is detected, the rubber is refining, and then the semi-finished product is obtained by extrusion. The cross-linking system contains a crosslinking agent, and may also contain a crosslinking agent. And at least one of a vulcanization accelerator;

(2) Vulcanization: one-stage compression vulcanization: temperature is 155-170 ° C, vulcanization time is 20-25 minutes; second-stage oven vulcanization: temperature 145-155 ° C, time 40-80 minutes.
A waterproofing membrane characterized by comprising the rubber composition according to any one of claims 1 to 11.
A method of producing the waterproofing membrane of claim 41, characterized in that the production method comprises the following steps:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, mixing and arranging Glue, the kneaded rubber is fully thinned and kneaded in the open mill to obtain a uniformly mixed rubber flakes, cooled to below 50 ° C to be discharged and stacked, wherein the cross-linking system contains a crosslinking agent, and may also contain a cross-linking agent. At least one of a agent and a vulcanization accelerator;

(2) Hot-smelting: the uniformly mixed rubber flakes are heat-treated on the open mill until the rubber sheet is smooth and evenly rolled up;

(3) calendering: the rubber sheet which has been preliminarily rolled into a roll is placed on a calender, and the roll pitch is adjusted according to the thickness requirement of the finished product to obtain a semi-finished coil material meeting the requirements of the thickness specification of the finished product;

(4) Winding: According to the specification length requirements of the finished coil, the isolation liner layer is sandwiched, and the semi-finished coil is consolidated into a roll;

(5) vulcanization: the rolled material is placed in a nitrogen-containing vulcanization kettle for vulcanization treatment, the temperature of the vulcanization kettle is controlled between 155 and 165 ° C, the pressure is between 20 and 25 MPa, and the vulcanization is for 25 to 30 minutes;

(6) Rewinding: re-opening the vulcanized coil, taking out the release liner layer, and then rewinding and packaging into a product.
A weather strip comprising the rubber composition according to any one of claims 1 to 11.
A method of producing a weather strip according to claim 43, characterized in that the production method using compression vulcanization and stage vulcanization comprises the following steps:

(1) Rubber mixing: setting the temperature of the internal mixer and the rotation speed of the rotor, and adding the components other than the crosslinking system in the rubber composition to the internal mixer for mixing; then adding the crosslinking system, mixing and arranging a glue, the rubber compound is thinly passed through the open mill, parked and tested, wherein the crosslinking system comprises a crosslinking agent, and may further comprise at least one of a crosslinking agent and a vulcanization accelerator;

(2) The rubber compound after passing the test is extruded through an extruder, cut into a mold of a vulcanization apparatus, and subjected to a vulcanization under high temperature and high pressure;

(3) trimming the vulcanized product;

(4) The trimmed product is subjected to two-stage vulcanization at a high temperature;

(5) Inspect the product and put it into storage after passing the test.
An inner tube characterized in that the rubber composition for a carcass comprises the rubber composition according to any one of claims 1 to 11.
A method for producing a tube according to claim 45, comprising the steps of: first kneading rubber, filtering and parking; then extruding through an extruder and cutting according to the length required by the process, sticking the valve, Parked after splicing; then inflated and shaped, steam vulcanized, cooled, inspected, trimmed to get the finished product.