Patent ID: 6815076
Filing Date: 2004-11-09
Classification: C08K,C08L,C09J,Y10T

Abstract:
A silicone pressure-sensitive adhesive composition comprising:(A) 20 to 80 parts by weight of an alkenyl group-containing polydiorganosiloxane, (B) 80 to 20 parts by weight of a polyorganosiloxane containing R13SiO0.5 units and SiO2 units in a molar ratio between 0.6 and 1.7 wherein R1 is an alkyl, cycloalkyl or aryl group having 1 to 10 carbon atoms, (C) a SiH group-containing polyorganosiloxane in an amount to provide 0.5 to 20 mol of SiH groups per mol of alkenyl groups in component (A), (D) 0 to 5.0 parts by weight per 100 parts by weight of components (A) and (B) combined of a retarder, (E) a platinum catalyst in an amount to give 1 to 5,000 ppm of platinum based on the weight of components (A) and (B) combined, and (F) 0.1 to 10 parts by weight per 100 parts by weight of components (A) and (B) combined of a phenolic antioxidant in the form of a phenolic compound having in a molecule a structure of the following formula: wherein R is a monovalent hydrocarbon group having 1 to 6 carbon atoms wherein the straight lines in the positions ortho, meta, and para to the OH group represent bonds by which the structure is chemically bonded to the remainder of the phenolic compound.