Patent ID: 6090887
Filing Date: 2000-07-18
Classification: B29C,C08G,C08L,G03G,Y10T

Abstract:
A silicone rubber composition comprising:(A) 100 parts by weight of a diorganopolysiloxane having an average of at least two silicon-bonded alkenyl groups per molecule and containing an average at least 0.5 silicon-bonded alkenyl groups per molecule in pendant positions on the molecular chain;(B) 5 to 500 parts by weight of a filler;(C) an organopolysiloxane having an average of at least two silicon-bonded hydrogen atoms per molecule, in a quantity that affords a value from 0.4 to 10 for the molar ratio of silicon-bonded hydrogen atoms in component (C) to alkenyl groups in component (A), said organopolysiloxane having the general formula ##STR17## (D) an organohydrogenpolysiloxane with the general formula ##STR18## said organohydrogenpolysiloxane having an average of at least two silicon-bonded hydrogen atoms per molecule, in a quantity that affords a value from 0.01 to 0.5 for the molar ratio of silicon-bonded hydrogen atoms in component (D) to alkenyl groups in component (A); and(E) platinum catalyst in a catalytic quantity;wherein R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is a hydrogen atom or a monovalent hydrocarbon group, m is a positive integer, n is an integer with a value of zero or greater, x is a positive integer, and both the organopolysiloxane and the organohydrogenpolysiloxane are free of alkenyl groups.