Thermally conductive and insulating room temperature curing silicone rubber

Abstract

The invention discloses thermally conductive and insulating room temperature curing silicone rubber. According to the invention, alpha, omega-Hydroxyl terminated polydimethylsiloxane is used as a matrix, tetramethoxysilane is used as a cross-linking agent, Al2O3 is used as a main thermal conductive filler, AlN and SiC are used as auxiliary thermal conductive fillers, ZnO, nano-TiO2, nano-SiO2 andnano-Al2O3 are used as anti-settling additives, hydroxy silicone oil with viscosity of 1000mPa-s is suitable to be used as base silicone oil; tetramethoxysilane is used as a cross-linking agent, and the suitable use amount is 6 parts; dibutyltin diacetate and dibutyltin diacetylacetonate can be used as a catalyst, and the suitable use amount of dibutyltin diacetate is 0.3 wt%. When the filling amount of the thermally conductive and insulating room temperature curing silicone rubber is 8 wt%, 0.8 wt%, 0.8 wt% and 0.5 wt% respectively, the anti-settling performance of the silicone rubber is excellent, thermal conductivity of the silicon rubber can be raised to some extent, and the mechanical properties and insulating property are little influenced. The phenyl silicone oil and the hydroxy silicone oil are mixed according to a certain ratio as the base silicone oil to study the heat resistance of a pure silicone rubber matrix.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a heat-conducting and insulating room temperature curing silicone rubber. Background technique [0002] With the development of the electronics industry, electronic components and integrated circuits tend to be integrated and miniaturized, and higher requirements are placed on the thermal conductivity and insulation properties of silicone rubber. It is urgent to develop a silicon rubber with excellent comprehensive properties such as thermal conductivity and insulation. rubber material. Contents of the invention [0003] The purpose of the present invention is to provide a heat-conducting insulating room temperature curing silicone rubber to solve the problem of insufficient comprehensive performance of the existing heat-conducting insulating rubber proposed in the above-mentioned background technology. [0004] In order to achieve the above object, the present invention provid...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a thermally conductive insulating room temperature curing silicone rubber to solve the problem of insufficient comprehensive performance of the existing thermally conductive insulating rubber proposed in the above background technology