Foam-forming organopolysiloxane composition

Claim 1

A foam-forming organopolysiloxane composition comprising: (A) 100 parts by weight α,ω diorganopolysiloxane diol having the general formula: ##STR14## where R 1 and R 2 are monovalent hydrocarbon radicals or substituted monovalent hydrocarbon radicals, and n ranges from 200 to 3000; (B) 0.05 to 50 parts by weight α,ω-diorganopolysiloxane diol having the general formula: ##STR15## where R 3 and R 4 are monovalent hydrocarbon radicals or substituted monovalent hydrocarbon radicals, and m ranges from 2 to 46; (C) 0.5 to 30 moles of Si-H groups per mole of silanol groups in (A) and (B) as an organohydrogenpolysiloxane having at least two Si-H groups permolecule and having the general formula: ##EQU3## where R 5 is a saturated monovalent hydrocarbon radical, a is a number varying from 0 to 2 inclusive, b is a number varying from 1 to 3 inclusive, and a+b varies from 1 to 3 inclusive; and (D) 0.1 to 200 ppm of a platinum-containing compound to catalyze the dehydrogenation reaction of (A), (B) and (C).