THERMOCONDUCTIVE SILICONE RUBBER COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a thermoconductive silicone rubber composition that gives a highly elongatable cured product even when highly loaded with a thermoconductive filler. SOLUTION: The thermoconductive silicone rubber composition comprises (A) (A1) a polyorganosiloxane bearing at least two alkenyl groups bonded to a silicon atom in one molecule and (A2) a cyclic siloxane oligomer, (B) (B1) a polyorganohydrogensiloxane containing a siloxane represented by general formula: R6Si(OSiR72H)3(wherein R6is a 1-4C alkyl group or a phenyl group; and R7is a 1-4C alkyl group), (C) a thermoconductive filler and (D) a platinum catalyst, wherein (B1) is compounded in such an amount that the number of SiH groups in (B1) is at least 50% based on the total number of SiH groups in (B). The thermoconductive silicone rubber composition after cured exhibits a thermoconductivity of at least 2.0 W/(m×K) and an elongation at break of at least 50%. COPYRIGHT: (C)2007,JPO&INPIT