Patent ID: 7989574

Claim:
A curable silicone rubber composition, comprising: (A) an organopolysiloxane containing two or more aliphatic unsaturated groups bonded to silicon atoms within each molecule, having a viscosity at 25° C. within a range from 500 to 500,000 mm 2 /s, and containing either one of, or both, a phenyl group and a cyclohexyl group, (B) an organopolysiloxane resin with a three dimensional network structure, consisting essentially of SiO 2 units and (R 1 ) 3 SiO 0.5 units wherein, each R 1 represents, independently, a vinyl group, an allyl group, or a monovalent hydrocarbon group that contains no aliphatic unsaturated bonds, provided that 7.5 to 25 mol% of all R 1 groups within this component (B) represent, independently, a phenyl group, (C) an organohydrogenpolysiloxane, and (D) a platinum group metal-based catalyst, wherein said component (B) exists in a quantity that represents from 20 to 80% by mass of a combination of said component (A) and said component (B), and within said component (B), a quantity of low molecular weight substances, for which a weight average molecular weight measured by gel permeation chromatography and calculated against polystyrene standards is not greater than 500, is not greater than 5%.