Thermosetting foamable organopolysiloxane composition and proces

Details Thermosetting foamable organopolysiloxane composition and proces Thermosetting foamable organopolysiloxane composition and proces

1998-08-06

1999-05-04

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 91, 521134, 521154, 528 26, 528 31, C08J 902

Patent

active

059004380

ABSTRACT:
There is provided a thermosetting foamable organopolysiloxane composition comprising (A) an organopolysiloxane with a viscosity of 10-100,000 cSt at 25.degree. C. containing a specified amount of an alkenyl group and/or a hydroxyl group, such as a linear dimethylpolysiloxane blocked with a vinyldimethylsiloxy group or a hydroxydimethylsiloxy group at both terminal ends of the molecular chain and not containing an alkenyl group and a hydroxyl group in the diorganosiloxane repeating unit constituting the backbone chain; (B) an organohydrogenpolysiloxane and/or organohydrogensilane each having at least two hydrogen atoms bonded to --SiMe.sub.3 wherein Me stands for a methyl group or C.sub.6 H.sub.5 SiH.sub.3 ; (C) a compound having an active hydrogen group, such as a hydroxyl group-containing compound, such as alcohols; (D) a platinum catalyst; and (E) an acetylenic alcohol compound. This composition has shelf-stability at normal temperature and can form a foam having homogeneous foam cells in the mass production line including a heating step.

REFERENCES:
patent: 5356940 (1994-10-01), Giesen
patent: 5358975 (1994-10-01), Anderson
patent: 5552448 (1996-09-01), Kobayashi et al.

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