Patent ID: 7728080
Filing Date: 2010-06-01
Classification: C08G,C08L,C09J

Abstract:
1. A solventless silicone pressure-sensitive adhesive composition comprising: (A) a polyorganosiloxane having at least two alkenyl group-containing organic groups within each molecule, as represented by an average composition formula (1) shown below: wherein, R represents identical or different monovalent hydrocarbon groups of 1 to 10 carbon atoms, provided that at least two R groups contain alkenyl group-containing organic groups of 2 to 10 carbon atoms, a represents an integer of 2 or greater, b represents an integer of 1 or greater, and c and d each represent an integer of 0 or greater, provided that 300≦a+b+c+d≦2,000, (B) a polyorganohydrosiloxane having at least three SiH groups within each molecule, (C) a polydiorganosiloxane having alkenyl groups at both terminals, as represented by a formula (2) shown below: wherein, R 1 represents a methyl group or phenyl group, X represents an alkenyl group of 2 to 20 carbon atoms, and m satisfies 0≦m≦20, (D) a polydiorganosiloxane having SiH groups at both terminals, as represented by a formula (3) shown below: wherein, R 1 represents a methyl group or phenyl group, and n satisfies 0≦n≦20, (E) a polyorganosiloxane consisting of R (F) a platinum-based catalyst, and wherein the viscosity of the composition at 25° C. is within a range from 500 to 100,000 mPa·s.