Chemically modified silicone rubber and preparation method thereof

A technology of chemical modification and silicone rubber, which is applied in the field of polymer resin materials, can solve the problems that the silicone rubber matrix cannot be uniformly dispersed, the silicone rubber matrix can not be reinforced, and the filler is difficult to evenly disperse, so as to achieve stable mechanical properties and improved binding force , Improve the effect of cohesion

Active Publication Date: 2021-07-27
合盛硅业(上海)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the poor interfacial compatibility between the filler and the silicone rubber, it is difficult for the filler to disperse uniformly in the silicone rubber matrix during the product modification process, and the strong interaction between the filler molecules The effect will lead to further agglomeration of the filler during the preparation process, so that it will not be able to disperse evenly in the silicone rubber matrix, resulting in the inability to effectively reinforce the silicone rubber matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A chemically modified silicone rubber, comprising: silicone rubber, petroleum resin, linear silicone oil and filler;

[0032] Described petroleum resin is aminopropyltriethoxysilane modified petroleum resin;

[0033] The filler is a coupling agent modified sepiolite;

[0034] The silicone rubber is crosslinked with the aminopropyltriethoxysilane modified petroleum resin to form a three-dimensional network structure;

[0035] The linear silicone oil is filled in the voids of the three-dimensional cross-linked network structure and wound on the three-dimensional cross-linked network structure.

[0036] Above-mentioned product is prepared by following method:

[0037] In parts by weight, take 150 parts of hydrogenated petroleum resin, 90 parts of epichlorohydrin, and 0.5 parts of catalyst tetrabutylammonium bromide in sequence. Under the condition of 400mmHg, residual epichlorohydrin was removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl este...

Embodiment 2

[0043] A chemically modified silicone rubber, comprising: silicone rubber, petroleum resin, linear silicone oil and filler;

[0044] Described petroleum resin is aminopropyltriethoxysilane modified petroleum resin;

[0045]The filler is a coupling agent modified sepiolite;

[0046] The silicone rubber is crosslinked with the aminopropyltriethoxysilane modified petroleum resin to form a three-dimensional network structure;

[0047] The linear silicone oil is filled in the voids of the three-dimensional cross-linked network structure and wound on the three-dimensional cross-linked network structure.

[0048] Above-mentioned product is prepared by following method:

[0049] In parts by weight, take 180 parts of hydrogenated petroleum resin, 95 parts of epichlorohydrin, and 0.8 parts of catalyst tetrabutylammonium bromide in sequence. Under the condition of 410mmHg, vacuum distillation removes residual epichlorohydrin to obtain hydrogenated petroleum resin glycidyl ester;

[0...

Embodiment 3

[0055] A chemically modified silicone rubber, comprising: silicone rubber, petroleum resin, linear silicone oil and filler;

[0056] Described petroleum resin is aminopropyltriethoxysilane modified petroleum resin;

[0057] The filler is a coupling agent modified sepiolite;

[0058] The silicone rubber is crosslinked with the aminopropyltriethoxysilane modified petroleum resin to form a three-dimensional network structure;

[0059] The linear silicone oil is filled in the voids of the three-dimensional cross-linked network structure and wound on the three-dimensional cross-linked network structure.

[0060] Above-mentioned product is prepared by following method:

[0061] In parts by weight, take 200 parts of hydrogenated petroleum resin, 100 parts of epichlorohydrin, and 1.5 parts of catalyst tetrabutylammonium bromide in sequence. Under the condition of 420mmHg, residual epichlorohydrin was removed by vacuum distillation to obtain hydrogenated petroleum resin glycidyl est...

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PUM

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Abstract

The invention relates to chemically modified silicone rubber and a preparation method thereof. The product developed by the invention comprises silicone rubber, petroleum resin and linear silicone oil, the petroleum resin is aminopropyltriethoxysilane modified petroleum resin, and the silicone rubber and the aminopropyltriethoxysilane modified petroleum resin are crosslinked to form a three-dimensional network structure; and gaps of the three-dimensional cross-linked network structure are filled with the linear silicone oil. The preparation method of the chemically modified silicone rubber comprises the following steps: reacting hydrogenated petroleum resin with epoxy chloropropane to obtain hydrogenated petroleum resin glycidyl ester; heating the hydrogenated petroleum resin glycidyl ester and aminopropyltriethoxysilane, stirring and reacting under the protection of inert gas, and obtaining aminopropyltriethoxysilane modified petroleum resin; then mixing the silicone rubber, the aminopropyltriethoxysilane modified petroleum resin and an organic tin catalyst, heating and stirring for reaction, and then carrying out hot-pressing curing to obtain the product.

Description

technical field [0001] The invention belongs to the technical field of polymer resin materials, and more specifically relates to a chemically modified silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber is a widely used high-performance polymer elastomer. Its molecular chain has both inorganic and organic properties, and has excellent physical and chemical properties, such as high and low temperature resistance, insulation, ultraviolet radiation resistance, flame retardancy, Weather resistance, chemical resistance and chemical stability, which are mainly attributed to the bond energy of the Si-O bond (443.7kJ / mol) stronger than the bond energy of the C-C bond (345.7kJ / mol) and the higher Si-O bond ionization properties. Over the years, with the progress of relevant basic research, technology development and application research institutes, it has been widely used in daily life, electronic appliances, automobile industry, aerospace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L57/02C08K9/06C08K3/34
CPCC08L83/04C08L2312/00C08L2205/03C08L2205/025C08L57/02C08K9/06C08K3/346
Inventor 刘振伟
Owner 合盛硅业(上海)有限公司
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