Patent ID: 7919150
Filing Date: 2011-04-05
Classification: C08J,C08K,C09D,Y10T

Abstract:
1. A method of manufacturing a layered silicone composite material comprising the steps of: applying a second addition-curable organopolysiloxane composition that contains (A′) an organopolysiloxane having an average of at least two silicon-bonded alkenyl groups per molecule, (B) an organopolysiloxane having an average of at least two silicon-bonded hydrogen atoms per molecule, (C) a hydrosilylation catalyst for addition reactions, a second adhesion promoter, and optional additives selected from the group of fillers, addition-reaction inhibitors, dyes, pigments, flame retardants, and solvents onto a first silicone layer that is formed by curing a first addition-curable organopolysiloxane composition containing (A) an organopolysiloxane having an average of at least two silicon-bonded alkenyl groups per molecule, (B) an organopolysiloxane having an average of at least two silicon-bonded hydrogen atoms per molecule, (C) a hydrosilylation catalyst for addition reactions, a first adhesion promoter, and optional additives selected from the group consisting of fillers, addition-reaction inhibitors, dyes, pigments, flame retardants, and solvents, and where the first silicone layer has a hardness of less than JIS A 50; and forming a second silicone layer that has a hardness of JIS A 50 or more by curing said second addition-curable organopolysiloxane composition; wherein at least one of the first adhesion promoter and the second adhesion promoter is an organosilicon compound containing, per molecule, at least one silicon-bonded alkenyl group and at least one epoxy group.