Silicone rubber sponge composition and a method for the manufacture of a silicone rubber sponge

摘要

The invention provides a silicone rubber sponge composition characterized by the fact that it consists of (A) a liquid silicone rubber composition which generates gas in curing, 100 wt. parts, and (B) hollow particles of a thermoplastic silicone resin, 0.01-50 wt. parts, and a method for the manufacture of a silicone rubber sponge characterized by the fact that the above-described silicone rubber sponge composition is heated and cured under applied mechanical shear. The invention also provides a method for the manufacture of a silicone rubber sponge characterized by the fact that the above-described silicone rubber sponge composition is cured by heating to a temperature not lower than the softening point of the thermoplastic silicone resin. The silicone rubber sponge composition of the invention generates no toxic gas in curing and has fine uniform cells after the curing.