Patent ID: 7582697
Filing Date: 2009-09-01
Classification: C08K,C08L,C09J

Abstract:
1. A silicone rubber adhesive film comprising a composition formed from (A) 100 weight parts organopolysiloxane gum that has at least two alkenyl groups in each molecule; (B) 30 to 150 weight parts wet-method hydrophobic reinforcing silica that has a specific surface area of at least 200 m (C) 0.1 to 10 weight parts organohydrogenpolysiloxane that contains at least two silicon-bonded hydrogen atoms in each molecule; (D) a reaction mixture from (a) organopolysiloxane that has a branched molecular chain structure and that contains at least one silicon-bonded alkenyl group in each molecule and at least one silicon-bonded hydrolyzable group in each molecule, said organopolysiloxane having the general formula  in which R (b) a silicon-containing compound that contains at least one silicon-bonded epoxy-functional hydrocarbon group and at least one silicon-bonded hydrolyzable group, said silicon-containing compound having the formula  in which R  wherein component (D) is incorporated in said composition in a quantity such that the weight ratio of component (D) with respect to component (A) does not exceed 1/5; and (E) curing accelerator in an amount sufficient to cure the composition comprising components (A) to (D).