Silicone rubber sponge composition, sponge, and process for...

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C - Chemistry, Metallurgy

08

L

C08L 83/04 (2006.01)

Patent

CA 2344941

A silicone rubber sponge composition, a silicone rubber sponge, and a process for production thereof. The silicone rubber sponge composition comprises (A) 100 parts by weight organopolysiloxane gum described by average structural unit R a SiO(4- a)/2, where R is a monovalent hydrocarbon group or haloalkyl and a is 1.8 to 2.3 and having a viscosity at 25°C of 1,000,000 mPa s or above, (B) 1 to 400 parts by weight inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles, (D) 0.01 to 10 parts by weight a water- in-oil emulsion with silicone oil an oil phase, and (E) a curing agent in an amount sufficient to cure the composition.

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