Patent ID: 7588967

Claim:
A curable silicone rubber composition comprising (A) a vinyl-containing organopolysiloxane, (B) an organohydrogenpolysiloxane, (C) an aluminum metal based polymerization catalyst, (D) a platinum group metal based catalyst, and (E) a tackifier, wherein said component (A) comprises a first organopolysiloxane having a viscosity of 10 to 1,000,000 mPa·s at 25° C., said first organopolysiloxane being represented by formula (a), (b), (c), or (d): wherein each x and y is 0 or a positive integer, and the sum of x+y is such a number that the organopolysiloxane has a viscosity of 10 to 1,000,000 mPa·s at 25° C., and a second organopolysiloxane of resin structure comprising SiO 2 units, R 3 k R 4 p SiO 0.5 units and R 3 q R 4 r SiO 0.5 units wherein R 3 is vinyl or allyl, R 4 is an aliphatic unsaturation-free monovalent hydrocarbon group, k is 2 or 3, p is 0 or 1, k+p=3, q is0 or 1, r is 2 or 3, q+r=3, said second organopolysiloxane being present in an amount of 20 to 70% by weight based on the weight of component (A), said component (E) is a linear or cyclic organosiloxane oligomer of 4 to 50 silicon atoms having at least two functional groups selected from the class consisting of silicon-bonded hydrogen atoms, alkoxysilyl groups, and epoxy groups, or an isocyanurate compound represented by formula (3): wherein R 6 is an organic group represented by formula (4): or an aliphatic unsaturation-containing monovalent hydrocarbon group, at least one of R 6 is an organic group of formula (4), R 7 is hydrogen or a monovalent hydrocarbon group of 1 to 6 carbon atoms, and s is an integer of 1 to 6, or a hydrolytic condensate thereof or both, and wherein a cured product of the silicone rubber composition has an elongation of 20 to 30% according to JIS K-6301.