Curable and foamable organopolysiloxane composition

Details Curable and foamable organopolysiloxane composition Curable and foamable organopolysiloxane composition

1988-01-29

1989-01-31

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521154, 525478, 525479, 528 15, 528 31, 528 32, C08J 900

Patent

active

048016225

ABSTRACT:
The curable and foamable organopolysiloxane composition comprises three different organopolysiloxanes, of which (A) the first is an .alpha.,.omega.-divinyl dimethyl polysiloxane, (B) the second is an organopolysiloxane having, in a molecule, at least three silicon-bonded hydroxy groups and (C) the third is an organohydrogenpolysiloxane having, in a molecule, at least two silicon-bonded hydrogen atoms, along with a platinum catalyst. The platinum-catalyzed curing and foaming reactions proceed in two ways of, one, the hydrosilation between the vinyl groups in (A) and the silicon-bonded hydrogen atoms in (C) and, the other, by the dehydrogenation between the silanol groups in (B) and the silicon-bonded hydrogen atoms in (C). The composition gives a cured and foamed silicone rubber body having excellent mechanical properties with a good cell structure by standing at room temperature or by heating up to 70.degree. C.

REFERENCES:
patent: 3923705 (1975-12-01), Smith
patent: 4590222 (1986-05-01), Bauman
patent: 4593049 (1986-06-01), Bauman
patent: 4695597 (1987-09-01), Seino

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