Self-lubricating silicone rubber and preparation method thereof

A silicone rubber and self-lubricating technology, which is applied in the field of self-lubricating silicone rubber and its preparation, can solve the problems that silicone rubber cannot be used as a dynamic sealing material, and the surface friction of silicone rubber is large, so as to avoid detonation and reduce moisture content , control the effect of appearance particles

Inactive Publication Date: 2019-11-12
HUBEI XINHAIHONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface friction of silicone rubber is relatively large, so that silicone rubber cannot be used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A self-lubricating silicone rubber, comprising the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 20 parts of fumed silica, 3 parts of vinyl hydroxy silicone oil, 0.15 parts of zinc stearate, diphenyl silicone oil 20 parts, calcium oxide 7 parts.

[0025] A preparation method of self-lubricating silicone rubber, comprising the steps of:

[0026] (1) Weigh each component by formula;

[0027] (2) Put the methyl vinyl silicone rubber into the kneader and knead it;

[0028] (3) Add fumed silica into the kneader in batches and mix and knead with methyl vinyl silicone rubber. During this process, add vinyl hydroxy silicone oil, zinc stearate, diphenyl silicone oil and calcium oxide, mix well and then heat up 160°C, continue kneading for 2 hours after forming a dough;

[0029] (4) cooling and filtering the product obtained in step (3) to obtain the self-lubricating silicone rubber.

[0030] A self-lubricating silicone rubber, comprising...

Embodiment 3

[0037] A self-lubricating silicone rubber, comprising the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 10 parts of fumed silica, 1 part of vinyl hydroxy silicone oil, 0.12 parts of zinc stearate, diphenyl silicone oil 10 parts, calcium oxide 2 parts.

[0038] A preparation method of self-lubricating silicone rubber, comprising the steps of:

[0039] (1) Weigh each component by formula;

[0040] (2) Put the methyl vinyl silicone rubber into the kneader and knead it;

[0041] (3) Add fumed silica into the kneader in batches and mix and knead with methyl vinyl silicone rubber. During this process, add vinyl hydroxy silicone oil, zinc stearate, diphenyl silicone oil and calcium oxide, mix well and then heat up 140°C, continue kneading for 1 hour after forming a dough;

[0042] (4) cooling and filtering the product obtained in step (3) to obtain the self-lubricating silicone rubber.

Embodiment 4

[0044] A self-lubricating silicone rubber, comprising the following components in parts by weight: 100 parts of methyl vinyl silicone rubber, 25 parts of fumed silica, 2 parts of vinyl hydroxy silicone oil, 0.14 parts of zinc stearate, diphenyl silicone oil 12 parts, calcium oxide 6 parts.

[0045] A preparation method of self-lubricating silicone rubber, comprising the steps of:

[0046] (1) Weigh each component by formula;

[0047] (2) Put the methyl vinyl silicone rubber into the kneader and knead it;

[0048] (3) Add fumed silica into the kneader in batches and mix and knead with methyl vinyl silicone rubber. During this process, add vinyl hydroxy silicone oil, zinc stearate, diphenyl silicone oil and calcium oxide, mix well and then heat up 145°C, continue kneading for 1.5 hours after forming a dough;

[0049] (4) cooling and filtering the product obtained in step (3) to obtain the self-lubricating silicone rubber.

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PUM

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Abstract

The invention belongs to the technical field of silica gel, and more specifically relates to a self-lubricating silicone rubber, and a preparation method thereof. The self-lubricating silicone rubbercomprises following components, by weight, 100 parts of methyl vinyl silicone rubber, 10 to 30 parts of fumed silica, 1 to 5 parts of vinyl hydroxy silicone oil, 0.10 to 0.15 part of zinc stearate, 10to 30 parts of diphenyl silicone oil, and 2 to 10 parts of calcium oxide. According to the preparation method, rubber physical performance is improved through improvement of rubber ratio; non-reactive silicone oil is added to reduce silica gel surface frictional force after sulfuration; an appropriate amount of calcium oxide is added to improve the stability of silica gel products; special zinc stearate component is added to improve moulding demoulding performance and roller adhesion performance, so that silica gel surface friction force is reduced without influencing silica gel basic performance, product wearing is reduced, silica gel dynamic sealing effect is achieved, and product service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of silica gel, in particular to a self-lubricating silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber is a polymer insulating material with both inorganic and organic properties. It is a chain structure formed by Si-O (silicon-oxygen) bonds. The Si-O bond energy is 443.5KJ / MOL, which is higher than the C-C bond energy (355KJ / MOL) is much higher, and because of its unique molecular structure, silicone rubber has better heat resistance, electrical insulation, chemical stability, etc. than other common rubbers. And because a very small amount of unsaturated vinyl and organic groups are introduced into its molecular side chain, such as methyl, phenyl, etc., this structure of silicone rubber has aging resistance and weather resistance, and has the effect on ozone and ultraviolet rays. It is also very stable and has excellent electrical insulation properties. Its resi...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08K3/36C08K5/098
CPCC08L83/04C08L2205/025C08L2205/03C08K3/36C08K5/098
Inventor 陶明海黄立忠
Owner HUBEI XINHAIHONG CHEM
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