COMPOSITION FOR SILICONE RUBBER FOAMS METHOD FOR PRODUCING SILICONE RUBBER FOAM AND SILICONE RUBBER FOAM

摘要

A composition for a silicone rubber foam capable of arbitrarily controlling the crosslinking state of the silicone rubber at the time of foaming and capable of controlling the foaming state such as cell diameter and expansion ratio, a process for producing the silicone rubber foam, and a silicone rubber foam. (A) 100 parts by mass of a polyorganosiloxane having a mass average degree of polymerization of 4,000 to 10,000 and having an alkenyl group in the molecule in an amount of 0.001 mmol / g or more and less than 0.3 mmol / g, In an amount such that the molar ratio of the hydrogen atom to the alkenyl group in the component (A) is from 0.001 to 5, and an organic foaming agent having a decomposition temperature of 50 to 250 ° C in an amount of 0.1 To 10 parts by mass of silica powder, 5 to 200 parts by mass of silica powder, and a catalytic amount of a platinum-group metal compound catalyst to be activated by ultraviolet rays.