Method for preparing silicone rubber/polyamide thermoplastic vulcanized rubber by virtue of reactive compatibilization

A thermoplastic vulcanizate, reactive compatibilization technology, applied in the field of polymer material processing, can solve the problems of high temperature resistance, poor oil resistance, limited compatibilization effect, inability to achieve complete compatibility between polyolefin and silicone rubber, etc. The effect of excellent performance and good physical and mechanical properties

Inactive Publication Date: 2016-08-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the added compatibilizer is graft-modified polyolefin, polyolefin itself has poor high temperature resistance and oil resistance, and polyolefin and silicone rubber cannot be completely compatible, so the compatibilization effect is limited, and at the same time, the prepared material is reduced. Excellent high temperature resistance and oil resistance

Method used

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  • Method for preparing silicone rubber/polyamide thermoplastic vulcanized rubber by virtue of reactive compatibilization
  • Method for preparing silicone rubber/polyamide thermoplastic vulcanized rubber by virtue of reactive compatibilization
  • Method for preparing silicone rubber/polyamide thermoplastic vulcanized rubber by virtue of reactive compatibilization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The selected raw material composition and mass parts are as follows:

[0029]

[0030] Wherein the raw material composition and mass parts of self-made compatibilizer are as follows:

[0031] Methyl vinyl silicone rubber 100;

[0032] Glycidyl methacrylate 0.01;

[0033] Dicumyl peroxide 1

[0034] According to the above formula, the preparation steps are as follows:

[0035] (1) Preparation of self-made solubilizer: Melt and mix methyl vinyl silicone rubber, glycidyl methacrylate, and dicumyl peroxide in a Haake mixer at 150°C for 5 minutes to obtain graft modified permanent silicone rubber;

[0036] (2) Rubber and plastic premixing: Add the dried polyamide 6, methyl silicone rubber, grafted modified silicone rubber and antioxidant 1010 into the internal mixer, mix at 220°C, and discharge after mixing evenly Cool to room temperature; at room temperature, mix with 2,5-dimethyl-2,5-bis(tert-butyl peroxide)hexane and 2,2,6,6-tetramethylpiperidine-nitrogen - The o...

Embodiment 2

[0042] The selected raw material composition and mass parts are as follows:

[0043]

[0044]

[0045] The raw material composition and mass fraction of the self-made compatibilizer are as follows:

[0046] Terminated vinyl silicone rubber 100;

[0047] Peroxybenzoic acid 2.

[0048] According to the above formula, the preparation steps are as follows:

[0049] (1) Preparation of self-made solubilizer: Dissolve vinyl-terminated silicone rubber and peroxybenzoic acid in chloroform, react for 96 hours at a temperature of 30°C, and a stirring paddle speed of 70rpm to prepare a epoxy-terminated Epoxy silicone rubber;

[0050] (2) Rubber and plastic premixing: add the dried polyamide 12, methyl vinyl silicone rubber, epoxy silicone rubber and antioxidant 1010 into the internal mixer, mix at 180°C, and leave after mixing evenly. The material is cooled to room temperature; at room temperature, use an open mill to mix with dicumyl peroxide and 2,2,6,6-tetramethylpiperidine-n...

Embodiment 3

[0056] The selected raw material composition and mass parts are as follows:

[0057]

[0058] Wherein the raw material composition and mass parts of self-made compatibilizer are as follows:

[0059] Methyl vinyl silicone rubber 100;

[0060] 1,2-epoxybutene 5;

[0061] Dibenzoyl peroxide 0.01.

[0062] According to the above formula, the preparation steps are as follows:

[0063] (1) Preparation of self-made solubilizer: Melt and mix methyl vinyl silicone rubber, 1,2-epoxybutene, and dibenzoyl peroxide in a Haake internal mixer at 180°C for 15 minutes to obtain grafted Modified silicone rubber;

[0064] (2) Rubber and plastic premixing: add the dried polyamide 6, methyl silicone rubber, graft-modified methyl vinyl silicone rubber and antioxidant 1010 into the internal mixer, mix at 260°C, and wait for mixing After uniformity, the discharge material is cooled to room temperature; at normal temperature, use an open mill to mix with dicumyl peroxide and 2,2,6,6-tetramethy...

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PUM

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Abstract

The invention discloses a method for preparing silicone rubber/polyamide thermoplastic vulcanized rubber by virtue of reactive compatibilization. According to the method, the raw materials (parts by weight) are as follows: 100 parts of silicone rubber, 20-90 parts of polyamide, 1-20 parts of a self-made solubilizer, 0.5-2 parts of an antioxidant, 1-5 parts of a vulcanizing agent and 0.5-2 parts of a polymerization inhibitor, wherein the self-made solubilizer is epoxidized silicone rubber obtained by epoxidation reaction of peroxy acid and vinyl-terminated silicone rubber. The method comprises the steps of carrying out shearing blending on the silicone rubber, polyamide, the self-made solubilizer and the antioxidant at 170-260 DEG C to obtain a mixture, uniformly mixing the mixture with the vulcanizing agent and the polymerization inhibitor at the room temperature, and finally carrying out high-temperature high-speed dynamic vulcanizing, so as to obtain the silicone rubber/polyamide thermoplastic vulcanized rubber. The thermoplastic vulcanized rubber has the characteristics of fine microcosmic phase state structure, excellent physical and mechanical properties, excellent high temperature resistance and oil resistance and the like and can be applied to automotive fuel rubber pipes, conveying belts, cable insulation layers, tool handles and the like.

Description

technical field [0001] The invention relates to a method for preparing silicone rubber / polyamide thermoplastic vulcanizate by reactive compatibilization. It belongs to the field of polymer material processing. Background technique [0002] Thermoplastic vulcanizate is a special thermoplastic elastomer obtained by dynamic vulcanization reaction processing technology. When a small amount of plastic phase is melt-blended with a large amount of rubber, the rubber is chemically cross-linked under the action of the cross-linking agent, and the viscosity increases. Therefore, under the action of high-temperature mechanical shear, the phase inversion of the rubber-plastic blend occurs, and a large amount The rubber phase is broken into micron particles and uniformly dispersed in a small amount of plastic phase, and the rubber is cross-linked to form a special sea-island structure. This special structure makes thermoplastic vulcanizate not only have the high elasticity and softness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07C08L83/06C08L83/08C08L77/02C08L77/06C08L77/00C08L51/08
CPCC08L83/04C08L83/06C08L83/08C08L2201/08C08L2205/025C08L2205/03C08L2205/08
Inventor 田明花月庆宁南英张立群吴汉光田洪池
Owner BEIJING UNIV OF CHEM TECH
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