Fireproof flame-retardant silicon rubber

Abstract

The invention provides fireproof flame-retardant silicon rubber. The fireproof flame-retardant silicon rubber is prepared from the following components in parts by weight: 300 parts of silicone raw rubber, 30-70 parts of reinforced filler, 15-30 parts of anti-structuralization assistant, 40-90 parts of aluminum powder, 3-5 parts of releasing agent, 10-40 parts of special filler, and 4-10 parts ofvulcanizing agent. In high temperature or combustion environment, the aluminum powder is heated for decomposing and absorbing heat, and a temperature of the silicone rubber is reduced, secondly watermolecules are released by thermal decomposition by heating, an oxygen concentration can be diluted, so combustion is prevented from being continuously performed. The special filler is prepared from one or more of mica, aedelforsite, kaolin, powder-like glass, glass fibers, a boron-containing compound and zinc oxide. Three parties of aluminum oxide generated by the thermal decomposition by heating,silicon dioxide generated by the combustion of the silicon rubber and the reinforced filler are sintered to generate a ceramic-like structure which covers the surface of the silicone rubber, oxygen can be isolated by the ceramic-like structure, a combustion process is prevented from being continuously diffused to an internal structure, and an internal device is prevented from being directly exposed in the high temperature or combustion environment.

Description

technical field [0001] The invention relates to the technical field of rubber products, in particular to a fire-resistant and flame-retardant silicone rubber. Background technique [0002] Silicone rubber refers to the rubber whose main chain is composed of silicon and oxygen atoms alternately, and there are usually two organic groups attached to the silicon atoms. Ordinary silicone rubber is mainly composed of silicone chains containing methyl groups and a small amount of vinyl groups. The introduction of phenyl can improve the high and low temperature resistance of silicone rubber. The heat resistance of silicone rubber is also outstanding. It can work for a long time at 180 ° C, and it can withstand several weeks or more at slightly higher than 200 ° C. It is still elastic , It can withstand high temperatures above 300°C instantaneously. Silicone rubber has good air permeability, and its oxygen transmission rate is the highest among synthetic polymers. Therefore, it is...

AI Technical Summary

Problems solved by technology

[0005] In the event of high temperature or fire, the silicone rubber burns into ashes, and the protective layer of flame-retardant silicone rubber loses its protective effect quickly, so that the internal components are directly exposed to the high temperature and combustion environment, posing a major safety hazard

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