Patent ID: 6379806
Filing Date: 2002-04-30
Classification: B29C,B32B,H05K,Y10T

Abstract:
A thermally conductive heat-resistant silicone rubber composite sheet comprising a silicone rubber sheet and a heat-resistant resin film layer on at least one side of the silicone rubber sheet, wherein the silicone rubber sheet and the heat-resistant resin film layer is bonded with a silicone adhesive, wherein said silicone rubber sheet is molded of a silicone rubber composition that comprises (A) 100 parts by weight of organopolysiloxanes which have an average polymerization degree of at least 200, (B) 10 to 100 parts by weight of carbon black containing volatile impurities except water in a content of at most 0.5 weight %, (C) more than 0 to less than or equal to 1,200 parts by weight of at least one thermally conductive substance selected from the group consisting of metals, metal oxides, metal nitrides and metal carbides and (D) a curing agent, provided that the total proportion of the components (B) and (C) is from 40 to 1,300 parts by weight, and the total of components (B) and (C) has volatile impurity content of at most 0.2 weight % when it is heated at 150Â° C. for 3 hours.