Patent ID: 8217132
Filing Date: 2012-07-10
Classification: C08L,F16J

Abstract:
1. A silicone rubber composition that is used as a vulcanization-molding material for a high-pressure gas seal material, which silicon rubber composition comprises 100 parts by weight of vinyl group-introduced methylfluoroalkylvinyl-based silicone rubber obtained by copolymerization of dimethylsiloxane copolymerization units as the main component with 5-50 mol. % of a methylfluoroalkylsiloxane copolymerization unit, and 0.5-5% by mole of methylvinylsiloxane copolymerization unit, 50-120 parts by weight of silica as a reinforcing agent, 2-12 parts by weight of hexamethyldisilazane as a surfactant for compounding the silica on the basis of 100 parts by weight of the silica, 10-30% by weight of water on the basis of the weight of the surfactant for compounding the silica, and 0.2-8 parts by weight of an organic peroxide selected from benzoyl peroxide, p-chlorobenzoyl peroxide, 2,4-dichlorobenzoyl peroxide, di-t-butyl peroxide, t-butyl cumyl peroxide, dicumyl peroxide, 1,1-di(t-butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, 2,5-dimethyl-2,5-di(t-butylperoxy)hexine-3, 1,3-di(t-butylperoxyisopropyl)-benzene, 2,5-dimethyl-2,5-di(benzoylperoxy)hexane, t-butylperoxy benzoate, and n-butyl-4,4-di(t-butylperoxy) valerate.