Patent ID: 7232609
Filing Date: 2007-06-19
Classification: C08G,C08K,C08L,Y10T

Abstract:
1. A polymer base composite high voltage insulator having a monolithic protective coating of a one-part organopolysiloxane rubber composition comprising the product which is obtained by mixing the following: a) from about 20 to about 60 weight percent of one or more polydiorganosiloxane fluids of the formula b) from 0 to about 40 weight percent of a cyclo-organosiloxane of the formula c) from 0 to about 40 weight percent of an inorganic extending or non-reinforcing filler d) from about 0.5 to about 15 weight percent of an amorphous SiO e) from about 1 to about 10 weight percent of an oximinosilane cross-linking agent of the formula; f) from about 0.2 to about 3 weight percent of an adhesion promoter of the formula g) from about 0.02 to about 3 weight percent of an organotin salt as a condensation catalyst; and h) from about 20 to about 50 weight percent of alumina trihydrate, the alumina trihydrate having a median particle size of about 10 μm to about 30 μm, containing 65.1 percent Al