KR101002708B1 - Resin composition for manufacturing insulation material and method for producing same - Google Patents

Abstract

The present invention is 30 to 50 parts by weight of the base resin based on the weight of the resin composition for manufacturing the entire insulating material; 30 to 60 parts by weight of a flame retardant in which magnesium hydroxide surface-treated with vinylsilane and aluminum surface-treated aluminum hydroxide are mixed in a weight ratio of 9: 1 to 8: 2; 0.1 to 5 parts by weight of antioxidant; 0.1 to 10 parts by weight of lubricant; 0.1 to 3 parts by weight of a flexible additive; 0.1 to 5 parts by weight of organosilane; The resin composition for insulating material manufacture containing 0.01-1 weight part of initiators, and 0.001-3 weight part of catalysts.

Insulation material, electric wire, resin composition, inorganic flame retardant, oil resistance, flexibility

Description

Resin Composition for Producing Insulation Material and Manufacturing Method Thereof {Resin Composition for Producing of Insulating Material with Flame Retardant}

The present invention relates to a resin composition for preparing an insulating material, and more particularly, flame retardance and oil resistance by being manufactured through cross-linking without using halogen, which is an environmental pollutant used to improve the workability and flame retardancy of an insulating material for manufacturing an electric wire. And it relates to a resin composition for producing an insulating material excellent in tensile strength and the like.

In general, a variety of polymer materials have been used to provide electrical insulation. Since the maintenance of the wire and continuous performance over a long period of time are required, the polymer material constituting the wire needs appropriate electrical characteristics and durability. Even if used for a long time, it should satisfy the characteristic of maintaining the initial performance stably.

In particular, it is common for various wires to have a coating layer such as an insulating layer or a buffer layer, and the material forming such a coating must be basically flame retardant. Conventionally, a flame retardant containing a halogen element is used for the wire coating layer. Flame retardancy has been implemented.

In recent years, however, it has been found that wire covering layers made of a material containing halogen elements generate harmful gases such as hydrogen chloride gas and dioxins during combustion due to incineration or fire caused by waste treatment.

These harmful gases are not only fatal to living organisms, but also cause serious problems such as causing corrosion of various devices. Therefore, despite the excellent flame retardancy, the use of a polymer resin or flame retardant containing a halogen element such as chlorine is limited.

On the other hand, the base resin and the flame retardant used in the resin composition for the production of flame retardant material contains a small amount of water, such a small amount of water causes a factor that makes the cross-linking reaction during the compound and extrusion process, making the process itself impossible. Even if the surface treatment is performed on the non-halogen-based inorganic flame retardant as the flame retardant included in the resin composition for preparing the insulating material, it is difficult to completely exclude the minute moisture, and still cannot solve the problems associated with the occurrence of the cross-linking reaction. There are technical limitations.

In particular, when the metal hydroxide in the untreated state is used as a flame retardant, a scorch phenomenon may occur during the compounding process, thereby deteriorating the mechanical properties or worsening of the material composition. In addition, crosslinking proceeds in a natural state after compounding, thereby increasing the melt index of the compound, thereby significantly reducing extrusion processability.

Moreover, the temperature conditions of the extrusion process are difficult to control, and when the number of rotation of the extrusion screw is increased to increase the extrusion amount, the internal heat is increased by the high shear stress, the scorch is generated, and the extrusion processing becomes difficult. As a result of poor appearance of the insulating material produced, the quality of the electric wire is degraded, and the mechanical properties of the insulating material are difficult to secure.

On the other hand, in the case of electric wires, sufficient mechanical properties, heat resistance, oil resistance, etc. required according to the use purpose and environment should be secured. When using a metal hydroxide flame retardant without surface treatment, the flame retardant may be formed of a base resin and a crosslinking agent. It does not facilitate the cross reaction, making it difficult to satisfy the required conditions.

Accordingly, in order to overcome the above-mentioned problems, Korean Patent No. 0729012 has an inorganic flame retardant made of magnesium hydroxide and aluminum hydroxide surface-treated as a material selected from vinylsilane, stearic acid, oleic acid, aminopolysiloxane, and polymer resin. A resin composition for producing an insulating material is disclosed.

However, when manufacturing the electric wire and the like with the above-described composition of the prior art, the oil resistance that can withstand harsh conditions is not high, and the flame retardant condition is satisfied because a large amount of non-halogen flame retardant is used to provide a high flame retardancy, There is a problem that a crack occurs in the wire due to lack of flexibility due to poor properties such as specific gravity, hardness and bending required.

In addition, the water crosslinking method according to the prior art has a problem that the scorch is generated early according to the change of temperature and working conditions by mixing the base resin and the flame retardant with the organic silane and the crosslinking retardant together and then crosslinking reaction. have.

The present invention relates to an organic silane which is a water crosslinking agent with an inorganic flame retardant and an untreated inorganic flame retardant surface-treated as an environmentally friendly non-halogen-based flame retardant to improve the workability, flame retardancy, oil resistance and flexibility of an insulating material for manufacturing an electric wire. There is a problem to be solved by providing a resin composition for preparing an insulating material and a method for producing the same, which are crosslinked using an initiator and a catalyst to produce an electric wire.

In one aspect, the present invention is 30 to 50 parts by weight of the base resin based on the total weight of the resin composition for preparing the insulating material; 30 to 60 parts by weight of a flame retardant in which magnesium hydroxide surface-treated with vinylsilane and aluminum surface-treated aluminum hydroxide are mixed in a weight ratio of 9: 1 to 8: 2; 0.1 to 5 parts by weight of antioxidant; 0.1 to 10 parts by weight of lubricant; 0.1 to 3 parts by weight of a flexible additive; 0.1 to 5 parts by weight of organosilane; It provides a resin composition for producing an insulating material comprising 0.01 to 1 part by weight of an initiator and 0.001 to 3 parts by weight of a catalyst.

In another aspect, the present invention is iii) 30 to 50 parts by weight of the base resin based on the weight of the resin composition for the production of the entire insulating material; 30 to 60 parts by weight of a flame retardant in which magnesium hydroxide surface-treated with vinylsilane and aluminum surface-treated aluminum hydroxide are mixed in a weight ratio of 9: 1 to 8: 2; 0.1 to 5 parts by weight of antioxidant; 0.1 to 10 parts by weight of lubricant; 0.1 to 3 parts by weight of a flexible additive; 0.1 to 5 parts by weight of organosilane; And mixing and mixing 0.01 to 1 parts by weight of an initiator; Ii) grafting the kneaded mixture of step iii); Iii) extruding the product from which the grafting reaction of step ii) is completed to prepare a compound; And iii) preparing 0.001 to 3 parts by weight of the catalyst in a master batch form based on the weight of the resin composition for preparing the insulating material.

In another aspect, the present invention provides a process for mixing the compound prepared in the form of the compound of step iii) and the master batch in step iii) and extruding the extruded extrudate in water maintained at a temperature of 80 to 90 ° C. It provides a method for producing an insulating material comprising the step of water cross-linking for 5 hours.

The resin composition for producing an insulating material according to the present invention is a resin composition for coating an electric wire, in particular an electric wire used for ships, or for producing an insulating material for covering an electric wire, and if the resin composition is commonly used in the art for this purpose Any will correspond to the resin composition of the present invention.

Base resin constituting the resin composition for producing an insulating material according to the present invention is used for improving the mechanical properties, electrical properties, appearance, etc. of the electric wire, if the base resin commonly used in the art for this purpose is not particularly limited. However, preferably, ethylene olefin α-copolymer (TAFMER), ethylene vinyl acetate copolymer having a vinyl acetate content of 50% to 70%, linear low density polyethylene (LLDPE), high density It is preferable to use polyethylene (High Density Polyethylene, HDPE) or a mixture thereof, and the amount thereof is preferably 30 to 50 parts by weight with respect to 100 parts by weight of the resin composition for manufacturing the whole insulating material.

In this case, the melt mass flow index (MFR) of the ethylene olefin α-copolymer, which is a substance usable as the polyolefin or a derivative thereof, is 0.5 to 1.5 g / 10 min at 190 ° C., and the pattern viscosity (ML) is 1 + 4 (100) 30. It is preferable that the melt mass flow index (MFR) of the linear low density polyethylene is 2.0 to 3.0 g / 10 min and the density is 0.910 to 0.940 g / cm ³ at 190 ° C.

In the present invention, the flame retardant is a non-halogen inorganic flame retardant, which uses a mixture of magnesium hydroxide and untreated aluminum hydroxide surface-treated with vinylsilane to facilitate the graft reaction of the reactant in the water crosslinking reaction. At this time, the magnesium hydroxide and the surface-treated aluminum hydroxide surface-treated as a flame retardant is mixed in a weight ratio of 9: 1 to 8: 2, the amount of the flame retardant is used 30 to 60 parts by weight based on the weight of the resin composition for manufacturing the whole insulating material Good to do.

Here, the magnesium hydroxide surface-treated with the vinylsilane inhibits the crosslinking reaction between the hydroxyl group and the alkoxy groups of the unsaturated organosilane on the magnesium hydroxide surface during compound processing, storage or extrusion.

In addition, when the weight ratio of the surface-treated magnesium hydroxide and the untreated aluminum hydroxide mixture is increased from 9: 1 to 8: 2 in the mixed weight ratio of the untreated aluminum hydroxide to the weight ratio of 7: 3 or more, the tensile strength residual ratio And the residual elongation is reduced, the oil resistance is not good.

On the other hand, with respect to the numerical range of the content of the flame retardant, it is not desirable to describe the flame retardancy if it is less than the lower limit, and if it exceeds the upper limit, the tensile strength, elongation rate, heat resistance and the like rapidly decrease due to the excessive content of inorganic materials and In addition, there arises a problem that the viscosity of the composition material rises and workability is lowered.

Antioxidant (Anti-Oxidant) according to the present invention is to prevent the oxidizing, that is, aging of the insulating material, specifically a wire made of an insulating material, etc., the antioxidant commonly used in the art for this purpose As long as it can use any, it is preferable, pentaerythryl- tetrakis [3- (3, 5- di-t- butyl- 4-hydroxyphenyl) propionate], 2,2'- Thiodiethylbis- [3- (3,5-di-t-butyl-4-hydroxyphenyl) -propionate], octadecyl-3- (3,5-di-t-butyl-4-hydroxy Hydroxyphenyl) propionate, 4,4'-thiobis (6-t-butyl-m-cresol), triethylene glycol-bis-3 (3-t-butyl-4-hydroxy-5-methylphenyl) prop Cypionate 4,4'-thiobis [2- (1,1-di-methethyl) -5-methyl-phenol, tetrakis-methylene (3,5-di-tert-butyl-4-hydroxycinnanate Phenolic antioxidants, such as) -methane, or dilauryl thiodiprop Good to use a polyester-based antioxidant, or a mixture thereof such as a carbonate, the amount of use thereof is preferably 0.1 to 5 parts by weight to the total weight of the insulating material for manufacturing the resin composition criteria.

Lubricant according to the present invention is to increase the processability by reducing the viscosity of the resin composition for preparing the insulating material, if the lubricant is commonly used in the art for this purpose is not particularly limited, but preferably wax-based For example, PE wax, paraffin wax and stearic acid series such as zinc stearate, magnesium stearate, calcium stearate and the like are used in combination of one or two or more kinds.

Here, the lubricant according to the present invention may interfere with the dispersion of the flame retardant, and particularly uniform dispersion according to the type of the base resin and the amount of the flame retardant, and specifically the inorganic flame retardant, and thus the preferred amount of the lubricant is based on the weight of the resin composition for preparing the whole insulation material. It is preferably 0.1 to 10 parts by weight, the workability is not good if the content of the lubricant is 0.1 parts by weight or less, and if the content is 10 parts by weight or more, it can inhibit the uniform dispersion of the flame retardant.

The flexible additive according to the present invention is intended to prevent cracking when the insulating material made of the resin composition for preparing the insulating material is bent or bent during handling, and is particularly used in the art for this purpose. Although not limited, Preferably polycaprolactone thermoplastics polymers (Polycaprolactone thermoplastics polymers) is preferably used, the amount of the use is preferably 0.1 to 3 parts by weight based on the total weight of the resin composition for the production of insulating material.

The organosilane according to the present invention is intended to form a composite having a network structure such as a net by forming a crosslink with a base resin, and any of the organosilanes commonly used in the art for this purpose may be used. Preferably, vinyltrimethoxysilane, vinyltriethoxysilane, tetraethoxysilane, tetra-n-propoxysilane, methyl-triethoxysilane, methyltrimethoxysilane, methyltri (2-methoxy to Methoxy) silane 3-methacryloyloxypropyl-trimethoxysilane, 3-mercaptopropyl-trimethoxysilane, 3-aminopropyl-trimethoxysilane, 3-glycidyloxypropyl-trimethoxysilane Or it is good to use these, It is good that the usage-amount is 0.1-5 weight part with respect to the weight of the resin composition for whole insulation material manufacture.

Herein, when the organosilane is added in an amount of 0.1 parts by weight or less based on the total weight of the resin composition for preparing an insulating material, the crosslinking degree of the polyolefin or its derivatives may be reduced, resulting in an uncrosslinked state. In particular, the grafting of the resin composition may not be easy due to the influence of the dispersion of the inorganic flame retardant and the decrease of the dispersion.

The initiator according to the present invention is a material for initiating a polymerization reaction, preferably a graft reaction, of a resin composition for preparing an insulating material. Any initiator may be used as long as it is commonly used in the art for this purpose. T-butyl cumyl peroxide, benzoyl peroxide, cumene hydroperoxide, dicumyl peroxide, methyl ethyl ketone peroxide, 2,5-dimethyl-2,5-di (t-butyl peroxy) hexane, di- It is preferable to use t-butyl peroxide, t-butyl peroxy benzoate, a, a-bis (t-butyl peroxy isopropyl) benzene, di-isopropylbenzene, or mixtures thereof, and the amount of the total insulation is used. It is good that it is 0.01-1 weight part with respect to the weight of the resin composition for manufacture.

The catalyst according to the present invention is a catalyst for the crosslinking reaction of the resin composition for preparing the insulating material, and is not particularly limited as long as it is a catalyst commonly used in the art for this purpose, but preferably dibutyl tin dilaurate (Dibutyl Tin Dilaurate) is preferably used, and its amount is preferably 0.001 to 3 parts by weight based on the total weight of the resin composition for preparing the insulating material.

In this case, the catalyst may be used together with the resin composition for preparing the insulating material according to the present invention from the beginning, but is prepared in the form of a master batch separately from the resin composition for preparing other insulating materials except for the catalyst, the insulating material, specifically It may be added and used in the water crosslinking reaction for producing an electric wire or the like.

As one example, a resin composition for preparing an insulating material except for a catalyst is prepared by preparing a compound by graft-reacting a base resin with an organosilane and an initiator in the composition, and the catalyst is prepared by master batching. Compounds and master batches are used in the manufacture of insulating materials or wires.

Referring to the resin composition for producing an insulating material according to the present invention having such a configuration, and an insulating material using the same, and specifically, a method of manufacturing an electric wire as an insulating material is as follows.

First iii) 30 to 50 parts by weight of the base resin, based on the weight of the resin composition for preparing the entire insulating material; 30 to 60 parts by weight of a flame retardant in which magnesium hydroxide surface-treated with vinylsilane and aluminum surface-treated aluminum hydroxide are mixed in a weight ratio of 9: 1 to 8: 2; 0.1 to 5 parts by weight of antioxidant; 0.1 to 10 parts by weight of lubricant; 0.1 to 3 parts by weight of a flexible additive; 0.1 to 5 parts by weight of organosilane; And mixing and mixing 0.01 to 1 parts by weight of an initiator;

Ii) grafting the kneaded mixture of step iii) to produce a silane graft copolymer;

Iii) extruding the silane graft copolymer of step ii) to produce a compound; And

Iii) preparing 0.001 to 3 parts by weight of the catalyst in a master batch form based on the weight of the resin composition for preparing the insulating material.

At this time, the grafting reaction of step ii) is kneaded for 10 to 30 minutes at a temperature of 170 to 230 ℃, the extrusion of step iii) using an extruder at a temperature of about 180 ℃ to about 180 ℃ as extrusion temperature conditions The catalyst of step iii) is prepared in the form of a master batch using conventional methods in the art.

Meanwhile, the steps of mixing the compound prepared in the above-described compound of step iii) and the master batch of step iv) and extruding the extruded extrudate in water maintained at a temperature of 80 to 90 ° C. for 3 to 5 hours Alternatively, an insulating material, specifically an electric wire, can be produced.

The present invention has an effect that the insulation material for an electric wire or an electric wire produced is environmentally friendly by configuring the resin composition for manufacturing an insulation material such as an electric wire with a resin composition containing no halogen.

In addition, the present invention is prepared by the graft reaction of the resin composition other than the resin composition catalyst for preparing the insulating material to prepare a compound, and by configuring the catalyst in the form of a master batch to ensure the stability against heat and moisture by not completely crosslinking during compound preparation In addition, there is an effect that can delay the scorch reaction without adding a scorch retardant.

Hereinafter, the present invention will be described in detail through examples. However, the following examples are only for illustrating the present invention in detail and are not intended to limit the scope of the present invention by these examples.

As described above, the catalyst constituting the resin composition for preparing the insulating material according to the present invention and other compositions except this may be prepared in the form of a catalyst master batch and a compound, respectively, and then mixed to proceed with the crosslinking reaction. Since it is intended to specifically explain the insulating material or the electric wire prepared using the resin composition for producing an insulating material according to the present invention will be described on the basis of preparing the insulating material by mixing together the catalyst and the resin composition for preparing other insulating materials except for the same.

≪ Example 1 >

100 g of ethylene olefin alpha copolymer [DF-805, Mitui Chemicals Inc., Japan] as the base resin; As a flame retardant, magnesium hydroxide surface-treated with vinyl silane [KISUMA 5P, Kyoywa Chemical Industry Co., Ltd.] has a weight ratio of magnesium hydroxide surface-treated with vinyl silane and aluminum surface-treated aluminum hydroxide as about 9: 1. Ltd., Japan] 125g and 15g untreated aluminum hydroxide [CK-300, Smitomo, Japan]; 3 g of amine mixture [ANOX-20, GLC, USA] as antioxidant; 5 g of lubricant [Exellex 40800, Mitui Chemicals Inc., Japan]; 3 g of Polycaprolactone termoplastics polymers [Placcel H, Daicel Chemical, Japan] as a flexible additive; 3 g of vinyltrimethoxysilane [Silane A-171, Degussa, USA] as organosilane; 0.05 g of dicumyl peroxide [DCP, NOF, Japan] as an initiator; And 0.01 g of a catalyst dibutyl tin dilaurate [DBTDL, Air Product, USA] were mixed to prepare a mixture.

Then, the mixture was kneaded at a temperature of 190 ° C. for 20 minutes in a 3 l / batch kneading apparatus (DISPERSION KNEADER, FINE MACHINERY CO., LTD.) For grafting reaction.

Then, the product after kneading was finished with an extruder [EXTRUDER, FINE MACHINERY CO., LTD.] Having a diameter of Φ 50 using a T-DIE hopper (150 ° C.), cylinder 1 Silver was extruded under the temperature conditions of 155 degreeC, cylinder 2 for 160 degreeC, and the die for 165 degreeC.

The tee-die extruded sheet was then hand-crossed in water maintained at a temperature of 80-90 ° C. for about 4 hours to prepare an insulating material.

The composition of the above-mentioned resin composition for insulating material manufacture was shown in Table 1.

<Example 2>

Magnesium hydroxide surface-treated with vinylsilane as a flame retardant [KISUMA 5P, Kyoywa Chemical Industry Co. Ltd., Japan] 125g, untreated aluminum hydroxide [CK-300, Smitomo, Japan] Magnesium hydroxide surface-treated with vinylsilane instead of 15g [KISUMA 5P, Kyoywa Chemical Industry Co., Ltd.] Ltd., Japan] 110g, 30g of untreated aluminum hydroxide [CK-300, Smitomo, Japan] was used.

At this time, the weight ratio of magnesium hydroxide surface-treated with vinyl silane constituting the flame retardant and aluminum hydroxide untreated is about 8: 2.

The composition of the resin composition for insulating material manufacture was shown in Table 1.

<Example 3>

Performed in the same manner as in Example 1, but using 100 g of ethylene olefin alpha copolymer [DF-805, Mitui Chemicals Inc., Japan] instead of 100 g of ethylene olefin alpha copolymer [DF-805, Mitui Chemicals Inc., Japan] as the base resin. And 20 g of ethylene vinyl acetate copolymer resin [Levapren 700HV, Bayer, Germany] having a vinyl acetate content of 70%.

The composition of the resin composition for insulating material manufacture was shown in Table 1.

<Example 4>

80 g of ethylene olefin alpha copolymer [DF-805, Mitui Chemicals Inc., Japan] instead of 100 g of ethylene olefin alpha copolymer [DF-805, Mitui Chemicals Inc., Japan] as the base resin. And 20 g of ethylene vinyl acetate copolymer resin [Levapren 700HV, Bayer, Germany] having a vinyl acetate content of 70%.

The composition of the resin composition for insulating material manufacture was shown in Table 1.

Comparative Example 1

Magnesium hydroxide surface-treated with vinylsilane as a flame retardant [KISUMA 5P, Kyoywa Chemical Industry Co. Ltd., Japan] 125g, untreated aluminum hydroxide [CK-300, Smitomo, Japan] Magnesium hydroxide surface-treated with vinylsilane instead of 15g [KISUMA 5P, Kyoywa Chemical Industry Co., Ltd.] Ltd., Japan] 140g was used, and 3g of polycaprolactone thermoplastics polymers (Placcel H, Daicel Chemical, Japan) was not used as the flexible additive.

The composition of the resin composition for insulating material manufacture was shown in Table 1.

Comparative Example 2

Magnesium hydroxide surface-treated with vinylsilane as a flame retardant [KISUMA 5P, Kyoywa Chemical Industry Co. Ltd., Japan] 125g, 140g of untreated aluminum hydroxide [CK-300, Smitomo, Japan] 140g of aluminum hydroxide surface-treated with vinylsilane [OL-104A, Albemarle, USA] was used as a flexible additive. 3 g of polycaprolactone thermoplastics polymers (Placcel H, Daicel Chemical, Japan) were not used.

The composition of the resin composition for insulating material manufacture was shown in Table 1.

Comparative Example 3

Performed in the same manner as in Comparative Example 1, but instead of 100 g of ethylene olefin alpha copolymer [DF-805, Mitui Chemicals Inc., Japan] as the base resin [DF-805, Mitui Chemicals Inc., Japan] 20 g of ethylene vinyl acetate copolymer resin [Levapren 500HV, Bayer, Germany] having 80 g and 50% vinyl acetate content was used.

The composition of the resin composition for insulating material manufacture was shown in Table 1.

Comparative Example 4

The same procedure as in Comparative Example 2 was carried out, except that 100 g of ethylene olefin alpha copolymer [DF-805, Mitui Chemicals Inc., Japan] was used as the base resin, instead of 100 g of ethylene olefin alpha copolymer [DF-805, Mitui Chemicals Inc., Japan] 80 g of ethylene vinyl acetate copolymer resin [Levapren 700HV, Bayer, Germany] with 80 g of vinyl acetate content of 70% was used.

The composition of the resin composition for insulating material manufacture was shown in Table 1.

Here, the resin A of Table 1 is an ethylene olefin alpha copolymer,

Resin B is an ethylene vinyl acetate copolymer resin having a vinyl acetate content of 50%,

Resin C is an ethylene vinyl acetate copolymer resin having a vinyl acetate content of 70%,

Flame retardant A is magnesium hydroxide surface-treated with vinylsilane,

Flame retardant B is aluminum hydroxide surface treated with vinylsilane,

Flame retardant C is aluminum hydroxide without surface treatment.

On the other hand, prior to explaining the experiment of the present invention, the physical properties of the resin composition for preparing the insulating material prepared by the embodiment of the present invention, such as tensile strength / elongation, heating properties, oxygen index, hot set, smoke density, extrudability, oil resistance, Specific gravity and hardness were measured and evaluated according to the following test method.

<Test and Evaluation Method>

(1) Tensile strength / elongation rate: It is preferable to have tensile strength of 9 MPa or more and elongation of 125% or more when measured while maintaining the tensile speed of 250 mm / min according to IEC 60811-1-1.

(2) Heating characteristics: In accordance with IEC 60800-1-2, after leaving the dumbbell-type specimen at 121 ° C and 168hrs for a time, the change of tensile strength and elongation is measured.

(3) Oxygen index: Measures the flame retardancy of materials according to ASTM D 2863. Oxygen index should be more than 30%.

(4) HOT SET: Measure the initial length of dumbbell-type specimens in accordance with IEC 60811-2-1, and then apply a load of 20 N / cm 2, leave at 200 ° C for 5 minutes, and take it out at room temperature. Cool slowly and measure the secondary length. As a result, the primary length should be less than 175% and the secondary length should be less than 15% compared to the initial length.

(5) Smoke density: According to ASTM D 662, it is preferable that the measured value of smoke density is 150 Ds max when measured with 3cm thickness, 7.5cm length and 7.5cm length square specimen.

(6) Extrudeability: Appearance was good when the appearance was smooth, glossy, and the load was low, and when the load was slightly increased while the appearance was smooth and good, the evaluation was good. Evaluates to be bad when the machine suddenly rises and stresses the machine.

(7) Oil resistance: According to IEC 60811-2-1, the dumbbell-type specimens were left in ASTM # 2 oil for 24 hours at 100 temperature, and then the rate of change in tensile strength and elongation was measured. It should be desirable.

(8) Specific Gravity: HFFR resin composition at room temperature and 1 atmosphere was subjected to ASTM D 792 (Standard Test Method for Density and Specific gravity of plastics by displacement, Annual Book of ASTM Standard D 792 Vol. 08. 01, pp. 185 ~ 188). Measured by

(10) Hardness: measured by ASTM D 2240 at room temperature 1 atmosphere, 23 ℃.

<Experiment>

Each wire insulating material manufactured according to the Examples and Comparative Examples was performed according to the above-described test and evaluation method, the results are shown in Table 2.

Here, A in Table 2 is the tensile strength residual (%), B is the elongation residual (%).

As shown in Table 2, the oil resistance 1 and oil resistance 2 of Examples 1 to 4 according to the present invention satisfies the oil resistance required at 100 ℃ for 24 hours and 48 hours, but Comparative Examples 1 to Comparative Example In the case of Example 4, the oil resistance 1 and the oil resistance 2 of the oil resistance was satisfied only at 100 ℃, 24 hours condition was not found to satisfy the oil resistance at 100 ℃, 48 hours conditions. This indicates that the resin composition for preparing an insulating material according to an embodiment of the present invention can withstand even more severe conditions than the resin composition for preparing an insulating material according to a comparative example.

In addition, the weight ratio of magnesium hydroxide surface-treated with vinyl silane and untreated aluminum hydroxide was 9: 1 to 8: 2, and the magnesium hydroxide alone or surface-treated with oil-resistant and tensile strength of the surface-treated vinyl silanes of the embodiments was 9: 1 to 8: 2. It can be seen that the aluminum hydroxide appeared significantly better than the comparative examples used alone.

As described above, those skilled in the art to which the present invention pertains will understand that the present invention may be implemented in other specific forms without changing the technical spirit or essential features. Therefore, it should be understood that the embodiments described above are all illustrative and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention all changes or modifications derived from the meaning and scope of the claims to be described later rather than the detailed description and equivalent concepts thereof.

Claims (10)

30 to 50 parts by weight of the base resin, based on the weight of the resin composition for manufacturing the whole insulating material; 30 to 60 parts by weight of a flame retardant in which magnesium hydroxide surface-treated with vinylsilane and aluminum surface-treated aluminum hydroxide are mixed in a weight ratio of 9: 1 to 8: 2; 0.1 to 5 parts by weight of antioxidant; 0.1 to 10 parts by weight of lubricant; 0.1 to 3 parts by weight of polycaprolactone temoplastic polymer; 0.1 to 5 parts by weight of organosilane; 0.01 to 1 part by weight of initiator and 0.001 to 3 parts by weight of catalyst. The method of claim 1, The base resin is an ethylene olefin α-copolymer, an ethylene vinyl acetate copolymer having a vinyl acetate content of 50 to 70%, a linear low density polyethylene, a high density polyethylene, or a mixture thereof. delete The method of claim 1, The organosilanes include vinyltrimethoxysilane, vinyltriethoxysilane, tetraethoxysilane, tetra-n-propoxysilane, methyl-triethoxysilane, methyltrimethoxysilane and methyltri (2-methoxy Ethoxy) silane 3-methacryloyloxypropyl-trimethoxysilane, 3-mercaptopropyl-trimethoxysilane, 3-aminopropyl-trimethoxysilane, 3-glycidyloxypropyl-trimethoxy It is a silane or a mixture thereof, The resin composition for insulating material manufacture characterized by the above-mentioned. The method of claim 1, The initiator is t-butyl cumyl peroxide, benzoyl peroxide, cumene hydroperoxide, dicumyl peroxide, methyl ethyl ketone peroxide, 2,5-dimethyl-2,5-di (t-butyl peroxy) hexane, Di-t-butyl peroxide, t-butyl peroxy benzoate, a, a-bis (t-butyl peroxy isopropyl) benzene, di-isopropyl benzene, or a mixture thereof. . The method of claim 1, Resin composition for manufacturing an insulating material, characterized in that the catalyst is dibutyl tin dilaurate. Iii) 30 to 50 parts by weight of the base resin, based on the weight of the resin composition for preparing the whole insulating material; 30 to 60 parts by weight of a flame retardant in which magnesium hydroxide surface-treated with vinylsilane and aluminum surface-treated aluminum hydroxide are mixed in a weight ratio of 9: 1 to 8: 2; 0.1 to 5 parts by weight of antioxidant; 0.1 to 10 parts by weight of lubricant; 0.1 to 3 parts by weight of a flexible additive; 0.1 to 5 parts by weight of organosilane; And mixing and mixing 0.01 to 1 parts by weight of an initiator; Ii) grafting the kneaded mixture of step iii) to produce a silane graft copolymer; Iii) extruding the silane graft copolymer of step ii) to produce a compound; And Iii) preparing 0.001 to 3 parts by weight of the catalyst in a master batch form based on the weight of the resin composition for preparing the insulating material. The method of claim 7, wherein The grafting reaction of the step ii) is kneaded for 10 to 30 minutes at a temperature of 170 to 230 ℃ method of producing a resin composition for producing an insulating material. The method of claim 7, wherein The extrusion method of step iii) is extruded under an extrusion temperature condition of 150 ℃ to 180 ℃ using an extruder method for producing a resin composition for producing an insulating material. The method according to any one of claims 7 to 9, Mixing the compound of step iii) and the catalyst prepared in the form of masterbatch in step iv) and extruding and extruding the extruded extrudate for 3 to 5 hours in water maintained at a temperature of 80 to 90 ° C. Method of manufacturing an insulating material comprising a.