High-strength copolymerized fluorinated silicone rubber composition and preparation method thereof

A fluorosilicone rubber, high-strength technology, applied in the field of preparation of high-strength copolymerized fluorosilicone rubber compositions, can solve the problems of low mechanical strength and insufficient heat resistance of copolymerized fluorosilicone rubber, and achieve improved mechanical strength, increased quantity, tightly wound effect
CN111423731AActive Publication Date: 2020-07-17深圳市森薄材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
深圳市森薄材料科技有限公司
Publication Date
2020-07-17

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Abstract

The invention relates to the technical field of rubber, specifically to a high-strength copolymerized fluorinated silicone rubber composition and a preparation method thereof. The fluorosilicone rubber composition comprises, in parts by weight, 100 parts of raw copolymerized fluorinated silicone rubber, 30 to 70 parts of fumed silica, 4 to 12 parts of hydroxyl fluorosilicone oil with a viscosityof 90 to 120 mPa.s (at 25 DEG C), 0 to 10 parts of high-vinyl fluorosilicone oil, 1 to 2 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane and 0 to 2 parts of pigment, wherein the side chain of a polymer chain of the raw copolymerized fluorinated silicone rubber contains trifluoropropyl polyhedral oligomeric silsesquioxane. The high-strength copolymerized fluorinated silicone rubber compositiondisclosed by the invention has better mechanical strength and improved high-temperature resistance after being vulcanized; and the fuel oil resistance of the composition can be obviously improved byintroducing a small amount of trifluoropropyl polyhedral oligomeric silsesquioxane, and the comprehensive performance of the composition is better.
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Description

technical field

[0001] The invention relates to the technical field of rubber, in particular to a high-strength copolymerized fluorosilicone rubber composition and a preparation method. Background technique

[0002] Fluorosilicone rubber, which introduces fluorine-containing groups on the side chain of the Si-O main chain, combines the heat resistance, cold resistance, and weathering resistance of silicone materials with the hydrocarbon solvent and oil resistance of organic fluorine materials. It is the only elastomer that is resistant to non-polar media at -68°C to 232°C, especially suitable for applications that require high temperature resistance and fuel resistance, such as seals, hoses, rubber pads and impregnated products, etc. , has a wide range of applications in the automotive industry, aerospace industry, petrochemical industry and other fields.

[0003] However, the cost of pure fluorosilicone rubber is very high. In some occasions where the requirements for fuel...

Claims

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