Patent ID: 7141273

Claim:
A curable organopolysiloxane composition comprising: (A) 100 parts by mass of an organopolysiloxane containing at least 2 alkenyl groups bonded to silicon atoms within each molecule, (B) an organohydrogenpolysiloxane containing at least 2 hydrogen atoms bonded to silicon atoms within each molecule, in sufficient quantity to provide from 0.1 to 5.0 hydrogen atoms bonded to silicon atoms within said component (B) for each alkenyl group bonded to a silicon atom within said component (A), (C) 300 to 5000 parts by mass of gallium and/or an alloy thereof, with a melting point within a range from 0 to 70° C., (D) 0 to 1000 parts by mass of a heat conductive filler with an average particle size within a range from 0.1 to 100 μm, (E) an effective quantity of a platinum based catalyst, and (F) an effective quantity of an addition reaction control agent; (G-1) 0.01 to 10 parts by mass of an alkoxysilane compound represented by a general formula (1) shown below: R 1 a R 2 b Si(OR 3 ) 4-a-b (1) wherein, each R 1 represents, independently, an alkyl group of 6 to 15 carbon atoms, each R 2 represents, independently, an unsubstituted or substituted monovalent hydrocarbon group of 1 to 8 carbon atoms, each R 3 represents, independently, an alkyl group of 1 to 6 carbon atoms, a represents an integer from 1 to 3, b represents an integer from 0 to 2, and a sum of a+b is an integer from 1 to 3.