Patent ID: 7547743

Claim:
A heat conductive silicone rubber composition comprising (A) 2 to 99 parts by weight of an organopolysiloxane containing, on the average, at least 0.1 silicon-bonded alkenyl radical in a molecule and having a viscosity of 50 to 100,000 mPa·s at 25° C., (B) an organopolysiloxane containing, on the average, at least 2 silicon-bonded hydrogen atoms in a molecule and having a viscosity of 1 to 100,000 mPa·s at 25° C., in an amount to give 0.1 to 6.0 moles of silicon-bonded hydrogen atoms per mole of total silicon-bonded alkenyl radicals in entire components, (C) a heat conductive filler in an amount of 100 to 3,500 parts by weight per 100 parts by weight of components (A) and (E) combined, (D) an effective amount of a platinum catalyst, and (E) 98 to 1 part by weight of an organopolysiloxane represented by the following formula and having a molecular weight of at least 10,000, the amount of components (A) and (E) combined being 100 parts by weight: wherein k 1 is an integer of 0 to 20, k 2 is an integer of 160 to 999, m′ is an integer of 1 to 20, and the sum of k 1 +k 2 +m′ is from 200 to 1,000.