CN115058068A - Wax-free, pollution-free and ozone-resistant natural rubber material and preparation method thereof - Google Patents
Wax-free, pollution-free and ozone-resistant natural rubber material and preparation method thereof Download PDFInfo
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- CN115058068A CN115058068A CN202210724721.1A CN202210724721A CN115058068A CN 115058068 A CN115058068 A CN 115058068A CN 202210724721 A CN202210724721 A CN 202210724721A CN 115058068 A CN115058068 A CN 115058068A
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- 244000043261 Hevea brasiliensis Species 0.000 title claims abstract description 46
- 229920003052 natural elastomer Polymers 0.000 title claims abstract description 46
- 229920001194 natural rubber Polymers 0.000 title claims abstract description 46
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 229920001971 elastomer Polymers 0.000 claims abstract description 44
- 238000002156 mixing Methods 0.000 claims abstract description 32
- ZNRLMGFXSPUZNR-UHFFFAOYSA-N 2,2,4-trimethyl-1h-quinoline Chemical compound C1=CC=C2C(C)=CC(C)(C)NC2=C1 ZNRLMGFXSPUZNR-UHFFFAOYSA-N 0.000 claims abstract description 16
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 10
- 239000011593 sulfur Substances 0.000 claims abstract description 10
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 9
- DNCLGFHLBSMLPC-UHFFFAOYSA-N [ethyl(phenyl)carbamothioyl]sulfanyl n-ethyl-n-phenylcarbamodithioate Chemical compound C=1C=CC=CC=1N(CC)C(=S)SSC(=S)N(CC)C1=CC=CC=C1 DNCLGFHLBSMLPC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000006229 carbon black Substances 0.000 claims abstract description 9
- 239000005662 Paraffin oil Substances 0.000 claims abstract description 8
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 8
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 8
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920000642 polymer Polymers 0.000 claims abstract description 8
- 239000008117 stearic acid Substances 0.000 claims abstract description 8
- 239000011787 zinc oxide Substances 0.000 claims abstract description 8
- STSDHUBQQWBRBH-UHFFFAOYSA-N n-cyclohexyl-1,3-benzothiazole-2-sulfonamide Chemical compound N=1C2=CC=CC=C2SC=1S(=O)(=O)NC1CCCCC1 STSDHUBQQWBRBH-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 9
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims description 8
- 229960002447 thiram Drugs 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 4
- 239000001993 wax Substances 0.000 claims 3
- 238000012360 testing method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- 150000001412 amines Chemical class 0.000 description 5
- 239000003963 antioxidant agent Substances 0.000 description 5
- 239000012188 paraffin wax Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 229960001701 chloroform Drugs 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a wax-free, pollution-free and ozone-resistant natural rubber material and a preparation method thereof, belonging to the technical field of rubber materials and comprising 70-90 parts of constant-viscosity natural rubber, 10-30 parts of ethylene propylene diene monomer, 4-7 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer, 40-45 parts of carbon black, 3-7 parts of paraffin oil, 1-2 parts of sulfur, 1-2 parts of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5-1.5 parts of N, N' -benzhydrylthiuram sulfide and 0.3-0.7 part of diethyldiphenylthiuram disulfide; the wax-free, pollution-free and ozone-resistant rubber material obtained by mixing the raw materials has the advantages of good hardness, tensile strength at break, elongation at break, deformation under pressure, ozone resistance and the like, particularly has an excellent ozone resistance effect, can pass a pollution-free test on a painted board, is long in service life and has good application value.
Description
Technical Field
The invention belongs to the technical field of rubber materials, and particularly relates to a wax-free, pollution-free and ozone-resistant natural rubber material and a preparation method thereof.
Background
Natural rubber is a substance mainly composed of cis-isoprene extracted from a rubber sap, and is formed by addition polymerization. Natural rubber can be divided into solid natural rubber and concentrated latex according to forms, and the solid natural rubber accounts for a large proportion in daily use. The oak sap was dispersed in water, and then the latex was collected, purified, coagulated and dried to obtain a raw rubber. The natural rubber has high elasticity and plasticity, is hardened by low-temperature crystallization, has high alkali resistance, is insoluble in water, lower ketone and alcohol, and can swell in nonpolar solvents such as trichloromethane, carbon tetrachloride and the like.
Because of its excellent properties, natural rubber has a wide range of applications, such as rain shoes, hot water bags, elastic bands, surgical gloves, blood vessels, blood transfusion bags, various tires used in transportation, and conveyor belts used in industry. The ozone resistance of natural rubber is poor, the natural rubber is corroded by ozone to cause cracks, and in order to increase the weather resistance of the natural rubber, paraffin and amine antioxidants are generally added.
However, the addition of antioxidants also brings disadvantages. The addition of paraffin and amine anti-aging agents is less, and the ozone resistance effect is poor; the addition of paraffin and amine antioxidants causes the precipitation of the antioxidants on the rubber surface, which results in contamination of the parts in contact with the antioxidants. Therefore, a preparation method without adding solid paraffin and polluting amine anti-aging agents is needed, so that the rubber material can achieve the effect of ozone resistance.
Disclosure of Invention
The invention aims to provide a wax-free, pollution-free and ozone-resistant natural rubber material and a preparation method thereof, so as to solve the problems in the background art.
The purpose of the invention can be realized by the following technical scheme:
a wax-free, pollution-free and ozone-resistant natural rubber material comprises the following components in parts by mass:
70-90 parts of constant-viscosity natural rubber, 10-30 parts of ethylene propylene diene monomer, 4-7 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer, 40-45 parts of carbon black, 3-7 parts of paraffin oil, 1-2 parts of sulfur, 1-2 parts of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5-1.5 parts of N, N' -benzhydryl thiuram sulfide and 0.3-0.7 part of diethyl diphenyl thiuram disulfide.
A preparation method of a wax-free, pollution-free and ozone-resistant natural rubber material comprises the following steps:
the method comprises the following steps: mixing constant-viscosity natural rubber and ethylene propylene diene monomer rubber in an internal mixer for 60-90s, then adding zinc oxide, stearic acid and 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer, mixing to 90 +/-5 ℃, adding carbon black and paraffin oil, mixing to 140-;
step two: standing the first-stage rubber for 8-16h, adding sulfur, N-cyclohexyl-2-benzothiazole sulfenamide, N' -diphenylmethyl thiuram sulfide and diethyldiphenylthiuram disulfide into the first-stage rubber, mixing to 120 ℃, and then discharging rubber to complete second-stage mixing to obtain final rubber;
step three: and (3) after the final rubber is molded, sending the final rubber into a vulcanizing machine, vulcanizing for 5-10min at the temperature of 160 +/-5 ℃, and finishing vulcanization to prepare the wax-free, pollution-free and ozone-resistant natural rubber.
Further, in the first-stage mixing process, the upper lifting plug is lifted up once at the temperature of 120 ℃ and 135 ℃ respectively, and the time for lifting up the upper lifting plug is 10-30 s.
The invention has the beneficial effects that:
the natural rubber material of the invention is added with a small amount of ethylene propylene diene monomer to meet the requirement of ozone resistance, has low sulfur content, and is not added with substances which are easy to separate out, such as solid paraffin and polluting amine age inhibitor, so that polluting substances can not be separated out, and contacted parts can not be polluted. The natural rubber material refined by the preparation method has the advantages of good hardness, tensile strength at break, elongation at break, deformation under pressure, ozone resistance and the like, particularly has excellent ozone resistance effect, can pass a pollution-free experiment on a paint plate, has long service life and has good application value.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation method of the wax-free, pollution-free and ozone-resistant natural rubber material comprises the following steps:
a preparation method of a wax-free, pollution-free and ozone-resistant natural rubber material comprises the following steps:
step one, mixing:
mixing constant viscosity natural rubber and ethylene propylene diene monomer rubber in an internal mixer for 60s, then adding zinc oxide, stearic acid and 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer, mixing to 85 ℃, then adding carbon black and paraffin oil, mixing to 140 ℃, wherein the upper top plug is lifted up once at the temperature of 120 ℃ and 135 ℃ respectively, the time for lifting up the upper top plug is 10s, and then discharging the rubber to obtain a section of rubber;
step two, two-stage mixing:
standing the first-stage rubber for 8 hours, adding sulfur, N-cyclohexyl-2-benzothiazole sulfonamide, N' -diphenylmethyl thiuram sulfide and diethyldiphenylthiuram disulfide into the first-stage rubber, mixing to 100 ℃, and discharging rubber to obtain final rubber;
step three, vulcanization:
and (3) after the final rubber compound is molded, sending the final rubber compound into a vulcanizing machine, and vulcanizing at the temperature of 155 ℃ for 5 min to prepare the wax-free, pollution-free and ozone-resistant natural rubber material.
Example 2
The preparation method of the wax-free, pollution-free and ozone-resistant natural rubber material comprises the following steps:
a preparation method of a wax-free, pollution-free and ozone-resistant natural rubber material comprises the following steps:
step one, mixing:
mixing constant-viscosity natural rubber and ethylene propylene diene monomer rubber in an internal mixer for 75s, then adding zinc oxide, stearic acid and 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer, mixing to 90 ℃, then adding carbon black and paraffin oil, mixing to 150 ℃, wherein the upper top plug is lifted up once at the temperature of 120 ℃ and 135 ℃ respectively, the time for lifting up the upper top plug is 20s, and then discharging to obtain a section of rubber;
step two, two-stage mixing:
standing the first-stage rubber for 12h, adding sulfur, N-cyclohexyl-2-benzothiazole sulfonamide, N' -diphenylmethyl thiuram sulfide and diethyldiphenylthiuram disulfide into the first-stage rubber, mixing to 110 ℃, and discharging rubber to obtain final rubber;
step three, vulcanization:
and (3) after the final rubber compound is molded, sending the final rubber compound into a vulcanizing machine, and vulcanizing 8 min at the temperature of 160 ℃ to prepare the wax-free, pollution-free and ozone-resistant natural rubber material.
Example 3
The preparation method of the wax-free, pollution-free and ozone-resistant natural rubber material comprises the following steps:
a preparation method of a wax-free, pollution-free and ozone-resistant natural rubber material comprises the following steps:
step one, mixing:
mixing constant-viscosity natural rubber and ethylene propylene diene monomer rubber in an internal mixer for 90s, then adding zinc oxide, stearic acid and 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer, mixing to 95 ℃, then adding carbon black and paraffin oil, mixing to 160 ℃, wherein the upper top plug is lifted up once at the temperature of 120 ℃ and 135 ℃ respectively, the time for lifting up the upper top plug is 30s, and then discharging to obtain a section of rubber;
step two, two-stage mixing:
standing the first-stage rubber for 8-16h, adding sulfur, N-cyclohexyl-2-benzothiazole sulfenamide, N' -diphenyl methyl thiuram sulfide and diethyl diphenyl thiuram disulfide into the first-stage rubber, mixing to 120 ℃, and discharging rubber to obtain final rubber;
step three, vulcanization:
and (3) after the final rubber compound is molded, sending the final rubber compound into a vulcanizing machine, and vulcanizing at 165 ℃ for 10min to prepare the wax-free, pollution-free and ozone-resistant natural rubber material.
Comparative example 1: on the basis of the example 3, the ethylene propylene diene monomer is not added, and the other steps are kept unchanged to prepare the natural rubber material.
The types of part of the starting materials used in examples 1 to 3 and comparative example 1 are shown in Table 1:
TABLE 1
| Raw materials | Model number |
| Natural rubber with constant viscosity | SMR10CV60 |
| Carbon black | N-550 |
| Sulfur | S-80 |
| N-cyclohexyl-2-benzothiazolesulfenamides | CBS-80 |
| N, N' -Diphenylmethyl thiuram sulfide | MPTD-70 |
| Diethyl diphenyl thiuram disulfide | TE-75GE |
The examples 1 to 3 and the comparative example 1 were subjected to performance tests, and test pieces of respective specifications were prepared according to respective test standards. Testing the Shore hardness of different samples according to GB/T531.1 at 23 ℃, testing the breaking strength and breaking elongation of different samples according to GB/T528, and testing the compression set (compression set of 25% at 70 ℃ multiplied by 22 h) of different samples according to GB/T7759.1; testing the hardness change, the tensile strength at break change rate and the elongation at break change rate of different samples according to GB/T3512 under the condition of air heat aging for 70h at 70 ℃; testing the low-temperature brittleness of different samples according to GB/T15256 at the temperature of-40 ℃; the ozone resistance of the different samples was tested according to GB/T7762 (80pphm X40 ℃ C. times.72 h X20% tensile). The results and corresponding criteria are shown in table 2:
TABLE 2
As can be seen from Table 2, the natural rubber materials prepared in examples 1 to 3 exhibited no cracking in the ozone resistance test.
The example 1-example 3 were tested for fouling: samples of example 1 to example 3, which had a length of 60mm, a width of 10mm and a thickness of 2mm, were taken, and placed in the middle of a white painted plate, a load of 5N was applied to the painted plate, the painted plate was treated in an incubator at 80 ℃ for 48 hours, and then the painted plate was taken out and washed with clean water, and no contamination was observed. The fatigue test is carried out on the sample according to the parameters of 0-5mm of stroke, 1Hz of frequency and 2000 times of cycle number, and the result has no abnormity.
It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The wax-free, pollution-free and ozone-resistant natural rubber material is characterized by comprising the following components in parts by mass:
70-90 parts of constant-viscosity natural rubber, 10-30 parts of ethylene propylene diene monomer, 4-7 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer, 40-45 parts of carbon black, 3-7 parts of paraffin oil, 1-2 parts of sulfur, 1-2 parts of N-cyclohexyl-2-benzothiazole sulfonamide, 0.5-1.5 parts of N, N' -benzhydryl thiuram sulfide and 0.3-0.7 part of diethyl diphenyl thiuram disulfide.
2. The method for preparing the wax-free, pollution-free and ozone-resistant natural rubber material according to claim 1, comprising the steps of: and (3) vulcanizing the final rubber for 5-10min at the temperature of 160 +/-5 ℃ after the final rubber is formed, and preparing the wax-free, pollution-free and ozone-resistant natural rubber.
3. The method for preparing the wax-free, pollution-free and ozone-resistant natural rubber material as claimed in claim 2, wherein the final rubber compound is prepared by the steps of:
the method comprises the following steps: mixing constant-viscosity natural rubber and ethylene propylene diene monomer for 60-90s, then adding zinc oxide, stearic acid and 2,2, 4-trimethyl-1, 2-dihydroquinoline polymer, mixing to 90 +/-5 ℃, adding carbon black and paraffin oil, mixing to 140 plus or minus 160 ℃, discharging rubber, and finishing first-stage mixing to obtain first-stage rubber;
step two: standing the first-stage rubber, adding sulfur, N-cyclohexyl-2-benzothiazole sulfonamide, N' -benzhydryl thiuram sulfide and diethyl diphenyl thiuram disulfide, mixing to 100-120 ℃, and discharging rubber to finish second-stage mixing to obtain the final rubber.
4. The method for preparing a natural rubber material without wax, pollution and ozone as claimed in claim 3, wherein the standing time of the rubber in the first step in the second step is 8-16 h.
5. The method for preparing a natural rubber material having the characteristics of no wax, no pollution and ozone resistance as claimed in claim 3, wherein the upper plug is lifted up once at a temperature of 120 ℃ and 135 ℃ in a primary mixing process.
6. The method for preparing a natural rubber material that is resistant to ozone and free of wax as claimed in claim 5, wherein the time for lifting the upper plug is 10-30 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210724721.1A CN115058068A (en) | 2022-06-23 | 2022-06-23 | Wax-free, pollution-free and ozone-resistant natural rubber material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210724721.1A CN115058068A (en) | 2022-06-23 | 2022-06-23 | Wax-free, pollution-free and ozone-resistant natural rubber material and preparation method thereof |
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| CN115058068A true CN115058068A (en) | 2022-09-16 |
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| CN202210724721.1A Pending CN115058068A (en) | 2022-06-23 | 2022-06-23 | Wax-free, pollution-free and ozone-resistant natural rubber material and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756037A (en) * | 2013-12-30 | 2014-04-30 | 宁国市正道橡塑零部件有限公司 | Machinable and ozone-resistant rubber material and preparation method thereof |
| CN106146921A (en) * | 2015-04-28 | 2016-11-23 | 安徽华润仪表线缆有限公司 | A kind of natural rubber cushion blocking material and preparation method thereof |
| CN107987326A (en) * | 2017-12-18 | 2018-05-04 | 南漳富元鼎航空器材配件有限公司 | Ethylene propylene diene rubber and natural rubber and compounded rubber and preparation method thereof |
| CN109796642A (en) * | 2018-12-21 | 2019-05-24 | 宁国市加能密封件有限公司 | A kind of sewage treatment environmental protection equipment air valve clamping cloth diaphragm material and preparation method thereof |
-
2022
- 2022-06-23 CN CN202210724721.1A patent/CN115058068A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756037A (en) * | 2013-12-30 | 2014-04-30 | 宁国市正道橡塑零部件有限公司 | Machinable and ozone-resistant rubber material and preparation method thereof |
| CN106146921A (en) * | 2015-04-28 | 2016-11-23 | 安徽华润仪表线缆有限公司 | A kind of natural rubber cushion blocking material and preparation method thereof |
| CN107987326A (en) * | 2017-12-18 | 2018-05-04 | 南漳富元鼎航空器材配件有限公司 | Ethylene propylene diene rubber and natural rubber and compounded rubber and preparation method thereof |
| CN109796642A (en) * | 2018-12-21 | 2019-05-24 | 宁国市加能密封件有限公司 | A kind of sewage treatment environmental protection equipment air valve clamping cloth diaphragm material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 邓本诚 等编: "《橡胶并用与橡塑共混技术 性能、工艺与配方》", 化学工业出版社, pages: 70 - 71 * |
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