SILICONE RUBBER COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a composition capable of forming a cured product having excellent compression set characteristics even after exposed in the atmosphere over a long period of time.SOLUTION: There is provided a silicone ruber composition having a viscosity at a shearing speed of 0.9 sat 25°C of 50000 to 5000000 mPa s which comprises: (A) a polyorganopolysiloxane containing an alkenyl group bonded to at least two silicon atoms in the molecule and having a viscosity at 25°C of 10 to 1000000 mPa s; an organohydrogenpolysiloxane containing a hydrogen atom bonded to at least two silicon atoms in the molecule; (C) silica having a BET specific surface area of 50 m/g or more; (D) a sulfur-containing inorganic filler composed of an organic filler mixture obtained by mixing a sulfur-containing compound and an inorganic filler, an organic filler reaction product obtained by reacting a sulfur-containing compound and an inorganic filler or the like and (E) an addition reaction catalyst.SELECTED DRAWING: None