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Low-temperature-resistant mixed silicone rubber and preparation method thereof

A technology of mixing silicone rubber and low temperature resistance, which is applied in the field of rubber production, and can solve the problems of long heat vulcanization time and low temperature resistance of low temperature resistant silicone rubber.

Active Publication Date: 2016-07-27
SHANDONG DONGYUE ORGANIC SILICON MATERIAL
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Problems solved by technology

However, the low temperature resistance of the low temperature resistant silicone rubber is still not high, only -85°C; and the heat vulcanization time is long, up to more than 10 hours

Method used

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  • Low-temperature-resistant mixed silicone rubber and preparation method thereof

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Embodiment Construction

[0008] Technical scheme of the present invention is as follows:

[0009] A kind of low-temperature-resistant mixing silicone rubber, the raw material components by weight are as follows: (A) 100 parts of low-temperature resistant silicone rubber raw rubber, (B) 7-10 parts of high-vinyl low-temperature resistant silicone rubber raw rubber, (C) white carbon 50-60 parts of black (D) 3-5 parts of hydroxyl silicone oil, (E) 0.3-1 part of dimethyldimethoxysilane, (F) 5-10 parts of hydrogen-containing silicone oil, (G) 0.01-0.05 parts of platinum catalyst share.

[0010] According to the present invention, preferably, the low-temperature-resistant silicone rubber raw rubber is vinyl silicone rubber raw rubber with a molecular weight of 600,000-750,000 and a vinyl mole percentage of 0.05-0.16%.

[0011] According to the present invention, preferably, the molecular weight of the high-vinyl low-temperature-resistant raw silicone rubber is 550,000-650,000, and the molar percentage of vi...

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Abstract

The invention relates to low-temperature-resistant mixed silicone rubber and a preparation method thereof. The silicone rubber is prepared from raw materials in parts by weight as follows: 100 parts of low-temperature-resistant raw silicone rubber, 7-10 parts of high-vinyl low-temperature-resistant raw silicone rubber, 50-60 parts of white carbon black, 3-5 parts of hydroxyl silicone oil, 0.3-1 part of dimethoxydimethylsilane, 5-10 parts of hydrogen-containing silicone oil and 0.01-0.05 parts of a platinum catalyst. The invention further relates to the preparation method of the silicone rubber. The silicone rubber has good low-temperature resistance, the tensile strength, the tear strength and other mechanical properties are greatly improved, and the preparation method is simple.

Description

technical field [0001] The invention relates to a mixing silicone rubber, in particular to a low-temperature-resistant addition-type high-temperature vulcanized silicone rubber and a preparation method thereof, belonging to the technical field of rubber production. Background technique [0002] Mixed silicone rubber is mainly high-temperature vulcanized silicone rubber (HTV), which is widely used in the preparation of various rubber products due to its good manufacturing and processing properties. With the development of modern science and technology, the performance requirements for silicone rubber are becoming more and more stringent, especially in the field of aerospace, during orbital operation of space stations or spacecraft, the shady side that is not irradiated by the sun, despite the use of appropriate temperature Control measures, but the lowest temperature can still reach -100 ℃ or even lower. Therefore, it is of great significance to study the silicone rubber mat...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L83/06C08L83/07C08L83/05C08K3/36C08J3/24
CPCC08J3/247C08J2383/04C08L83/04C08L2205/02C08L2205/025C08L2205/035C08L83/06C08K3/36
Inventor 王安营张振玉毛宁宋超周玲周磊
Owner SHANDONG DONGYUE ORGANIC SILICON MATERIAL
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