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

Active Publication Date: 2020-07-17
深圳市森薄材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there are currently problems of low mechanical strength and insufficient heat resistance of copolymerized fluorosilicone rubber.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0042] Preparation of monofunctional hepta(trifluoropropyl) POSS

[0043] Refer to the method of the journal document "Nanostructures and Surface Dewettability of EpoxyThermosets Containing Hepta (3,3,3-trifluoropropyl) Polyhedral Oligomeric Silsesquioxane-Capped Poly (ethylene oxide)".

[0044] (1) Hepta(trifluoropropyl)hydrogen POSS

[0045] Add 10g of hepta(trifluoropropyl)silsesquioxane trisilanol sodium salt and 1.3ml of triethylamine into a 500ml container, add 200ml of anhydrous tetrahydrofuran, stir, place in an ice-water bath, add dropwise 1.43g of trichloro The mixed solution of silane and 20ml of anhydrous tetrahydrofuran was stirred for 4 hours, heated to room temperature, continued to react for 20 hours, filtered, and the filtrate was rotary evaporated to remove the solvent to obtain a white solid powder, which was dried in an oven at 40°C to obtain the product.

[0046] FT-IR test shows that the product is at 2160cm -1 There is a moderate intensity sharp absorp...

Embodiment 1～6

[0059] High-strength copolymerized fluorosilicone rubber composition, including the following components:

[0060] A) Copolyfluorosilicone raw rubber

[0061] A-1) copolyfluorosilicone raw rubber 1;

[0062] A-2) copolyfluorosilicone raw rubber 2;

[0063] A-3) copolyfluorosilicone raw rubber 3;

[0064] A-4) copolyfluorosilicone raw rubber 4;

[0065] B) Fumed silica

[0066] B-1)cabot M-5;

[0067] B-2) evonik degussa A200;

[0068] C) Viscosity (25°C) 110mPa·s hydroxyfluorosilicone oil

[0069] D) High vinyl fluorosilicone oil

[0070] D-1) Viscosity (25°C) 430mPa·s, vinyl mass percentage 7.2%;

[0071]D-2) Viscosity (25°C) 690mPa·s, vinyl mass percentage 6.6%;

[0072] E) Double pentasulfurizing agent

[0073] F) Pigment

[0074] F-1) iron red;

[0075] F-2) ultramarine blue;

[0076] F-3) rutile titanium dioxide;

[0077] The formulations of the high-strength copolymerized fluorosilicone rubber compositions of Examples 1-6 are shown in Table 1.

[0078] Tab...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/10C08L83/08C08K7/26C08K5/14C08G77/44
CPCC08G77/44C08L83/10C08L2201/08C08L2205/02C08L2205/025C08L2205/03C08L83/08C08K7/26C08K5/14
Inventor 陈志强
Owner 深圳市森薄材料科技有限公司
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