Addition curable self-adhesive silicone rubber composition

摘要

An addition curable self-adhesive silicone rubber composition comprising (A) an organopolysiloxane containing alkenyl at either end, (B) an organosilicon compound containing phenylene and SiH group, (C) an organohydrogenpolysiloxane containing two SiH groups, (D) an organohydrogenpolysiloxane containing at least three SiH groups, and (E) an addition reaction catalyst is integrally moldable with thermoplastic resins.

主权项

1. An addition curable self-adhesive silicone rubber composition comprising
(A) 100 parts by weight of a linear organopolysiloxane containing one silicon-bonded alkenyl group at each end of the molecular chain, but no alkenyl group in the midway of the molecular chain, having an average degree of polymerization of up to 1,500, and being liquid at room temperature, (B) 0.1 to 10 parts by weight of an organosilicon compound of 1 to 100 silicon atoms containing at least one phenylene structure and at least one silicon-bonded hydrogen atom per molecule, (C) 0.01 to 10 parts by weight of an organohydrogenpolysiloxane containing two silicon-bonded hydrogen atoms per molecule, but no phenylene structure in the molecule, (D) 0.1 to 30 parts by weight of an organohydrogenpolysiloxane containing at least three silicon-bonded hydrogen atoms per molecule, but no phenylene structure in the molecule, and (E) a catalytic amount of an addition reaction catalyst, wherein a molar ratio of total silicon-bonded hydrogen atoms in components (B), (C) and (D) to alkenyl groups in component (A) is in a range of from 1.0 to 5.0, and a molar ratio of silicon-bonded hydrogen atoms in component (C) to alkenyl groups in component (A) is in a range of from 0.01 to 1.0.