Composition for flame-retardant silicone rubber, flame-retardant silicone rubber composition and flame-retardant silicone rubber

Abstract

The present invention provides a composition for silicone rubber, a silicone rubber composition, and a silicone rubber in which the flame retardant is platinum or a platinum compound and a triazole compound, and is remarkably excellent in flame retardancy. The flame-retardant silicone rubber composition comprises: 100 parts of (A) composed of the average unit formula RaSiO (4-a)1 / 2 (wherein, R is a monovalent non-substituted hydrocarbon group or a halogenated hydrocarbon group, and a is 1.8 ~ 2.3) represents an organopolysiloxane having at least 2 silicon-bonded alkenyl groups in one molecule, and 10 to 100 parts of (B) are made from a cyclic dimethylsiloxane oligomer Hydrophobized dry-process silica, 0 to 12 parts per 100 parts of component (B), diorganosiloxane oligomer or silanol group-containing organic Silane, 5 to 250 parts of (D) calcium carbonate powder, 1 to 1000 parts of (E) platinum or a platinum compound and 0.01 to 10 parts of (F) per 1 million parts of (A) as platinum metal. ) triazole compounds. (G) A curing agent is further included to obtain a flame-retardant silicone rubber composition, and the cured product thereof constitutes a flame-retardant silicone rubber.

Description

technical field [0001] The present invention relates to a silicone rubber composition which becomes a silicone rubber excellent in flame retardancy after curing, a silicone rubber composition which becomes a silicone rubber excellent in flame retardancy after curing, and a silicone rubber excellent in flame retardancy. Background technique [0002] It is generally believed that silicone rubber can be formed into various shapes due to its excellent properties such as heat resistance, cold resistance, weather resistance, mold release, and electrical insulation. It is used in electrical components, electronic components, automotive components, OA machine components, It is used in a wide range of fields such as building materials, office supplies, household goods, and medical supplies. Flame-retardant silicone rubber is generally used as electrical components, electronic components, automotive components, construction materials, and the like. Because flame-retardant organic rub...

AI Technical Summary

Problems solved by technology

However, if carbon black, pyrolytic titanium dioxide, iron oxide, and manganese carbonate are mixed, there will be problems that it is difficult to color other colors because of the strong coloring effect, and there is a safety problem with azo compounds

If a triazole compound is mixed, there is no such problem, but since the usual reinforcing silica is used as a reinforcing filler in Japanese Patent Publication No. 62-61613, there will be The problem of insufficient flame retardancy

In JP-A-11-66962, dry-process silica with a small specific surface area is used, and no efforts have been made to hydrophobize it, so the mechanical strength and flame retardancy of silicone rubber are not sufficient.