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High-temperature-resistant silicone rubber

A high-temperature resistant silicone rubber and rubber technology, applied in the field of silicone rubber, can solve the problems of the decrease of the elasticity and mechanical properties of the silicone rubber, the limited improvement of the high temperature resistance of the silicone rubber, the influence of the mechanical properties such as the hardness of the silicone rubber, etc., and achieve excellent mechanical properties, The effect of overcoming poor compatibility and improving mechanical properties

Pending Publication Date: 2020-04-17
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the current research on the preparation of high-temperature resistant silicone rubber has made some progress, but the existing high-temperature resistant silicone rubber still has shortcomings: metal oxides are relatively polar, and their compatibility with silicone rubber is poor, making it difficult to Dispersion, too much addition will lead to a serious decline in the elasticity and mechanical properties of silicone rubber; the compatibility between silicone resin and silicone rubber is good, but the high temperature resistance of silicone rubber is limited, and it also has a certain impact on the mechanical properties of silicone rubber such as hardness

Method used

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  • High-temperature-resistant silicone rubber

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Effect test

Embodiment 1

[0015] A high temperature resistant silicone rubber, the raw material and mass parts of the high temperature resistant rubber are: 80 parts of methyl vinyl silicone rubber (molecular weight: 450,000) with 0.08mol% vinyl content, 20 parts of methyl vinyl silicone rubber with 4mol% vinyl content Vinyl silicone rubber (molecular weight 550,000), 25 parts of white carbon black (specific surface area 200m 2 / g) and 1 part of hydroxy silicone oil (hydroxyl content 4wt%), 15 parts of heat-resistant additives and 1 part of dicumyl peroxide.

[0016] A preparation method for high temperature resistant silicone rubber, the specific operation steps are:

[0017] (1) Mix methyl vinyl silicone rubber, white carbon black and hydroxy silicone oil in a kneader according to the above mass parts, knead at room temperature for 4 hours, then heat to 150°C for 2 hours, and then vacuumize and knead for 1 hour , cooled to room temperature to obtain the silicone rubber base glue;

[0018] (2) Add h...

Embodiment 2

[0019] Embodiment 2 A kind of preparation of high temperature resistant silicone rubber

[0020] A high temperature resistant silicone rubber, the raw materials and mass parts of the high temperature resistant rubber are: 82 parts of methyl vinyl silicone rubber (molecular weight: 500,000) with 0.45 mol% vinyl content, 18 parts of methyl vinyl silicone rubber with 3 mol% vinyl content Vinyl silicone rubber (molecular weight 550,000), 35 parts of white carbon black (specific surface area 400m 2 / g) and 10 parts of hydroxy silicone oil (hydroxyl content 10wt%), 15 parts of heat-resistant additives and 6 parts of dicumyl peroxide.

[0021] A preparation method for high temperature resistant silicone rubber, the specific operation steps are:

[0022] (1) Mix methyl vinyl silicone rubber, white carbon black and hydroxy silicone oil in a kneader according to the above mass parts, knead at room temperature for 4 hours, then heat to 170°C and continue kneading for 1 h, then vacuum kn...

Embodiment 3

[0025] A high temperature resistant silicone rubber, the raw materials and mass parts of the high temperature resistant rubber are: 75 parts of methyl vinyl silicone rubber with 0.09mol% vinyl content (molecular weight: 550,000), 25 parts of methyl vinyl silicone rubber with 2mol% vinyl content Vinyl silicone rubber (molecular weight 500,000), 30 parts of white carbon black (specific surface area 200m 2 / g) and 7 parts of hydroxy silicone oil (hydroxyl content 6wt%), 9 parts of heat-resistant additives and 5 parts of dicumyl peroxide.

[0026] A preparation method for high temperature resistant silicone rubber, the specific operation steps are:

[0027] (1) Mix methyl vinyl silicone rubber, white carbon black and hydroxy silicone oil in a kneader according to the above mass parts, knead at room temperature for 4 hours, then heat to 140°C for 4 hours, and then vacuumize and knead for 1 hour , cooled to room temperature to obtain the silicone rubber base glue;

[0028] (2) Add...

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Abstract

The invention provides high-temperature-resistant silicone rubber. The high-temperature-resistant silicone rubber is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber, 20 to 50 parts of white carbon black, 1 to 10 parts of hydroxyl silicone oil, 1 to 15 parts of a heat-resistant additive and 1 to 6 parts of dicumyl peroxide. The invention discloses the heat-resistant additive in a high-temperature-resistant silicone rubber raw material. According to the present invention, the residual mass of the silicone rubber at the high temperature canbe significantly improved, the initial degradation temperature can be increased, the disadvantage of poor compatibility between the commonly-used heat-resistant additive and the silicone rubber can beovercome, and the original mechanical property of the silicone rubber can be improved, such that the silicone rubber has characteristics of good heat resistance and excellent mechanical property.

Description

technical field [0001] The present disclosure relates to the field of silicone rubber, in particular to a high temperature resistant silicone rubber. Background technique [0002] Silicone rubber is a special rubber with Si atoms and O atoms alternately bonded to form the molecular main chain skeleton, and various organic groups as side groups. Because of its carbon chain structure different from ordinary rubber, silicone rubber has excellent high and low temperature resistance, weather resistance, electrical insulation, anti-mold and physiological inertia. Ordinary silicone rubber can generally be used for a long time and maintain elasticity in the temperature range of -50-260°C, while the heat-resistant temperature of phenyl silicone rubber can reach 300-350°C. However, with the development of science and technology, especially in the field of aerospace, the current heat resistance of silicone rubber can no longer meet the requirements of some special fields. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08K13/06C08K9/06C08K3/36C08K7/26C08K5/14
CPCC08K2201/006C08L83/04C08L2201/08C08L2205/025C08K13/06C08K9/06C08K3/36C08K7/26C08K5/14
Inventor 陈宛涓梁兆灏潘志杰张敏樊婷黄卓权
Owner FOSHAN UNIVERSITY
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