Silicone rubber adhesive film

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 m2/g and that comprises SiO4/2 units and siloxane units selected from the group consisting of the R13SiO1/2 unit, R12SiO2/2 unit, and R1SiO3/2 unit (R1 in these formulas is C1-10 hydrocarbyl or C1-10 halogen-substituted hydrocarbyl), in which the molar ratio of the non-SiO4/2 siloxane units to the SiO4/2 units is 0.08 to 2.0;
• (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
• (R2R32SiOl/2)a(R33SiOl/2)b(R3Ol/2)c(SiO4/2)d
• in which R2 is C2-12 alkenyl, each R3 independently represents a C1-10 monovalent hydrocarbon group excluding alkenyl groups, a and c are numbers greater than or equal to one, b is a number greater than or equal to zero, d is a number greater than or equal to three but less than thirty, (a+b)/c=0.2 to 2, and (a+b+c)/d=0.4 to 4, and
• (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
• R4R3nSi(OR3)3-n
• in which R3 is a C1-10 monovalent hydrocarbon group excluding alkenyl groups, R4 is a glycidoxy-functional or epoxycyclohexyl-functional hydrocarbon group, and n is one or zero,
• 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).