Flame retardant silicone foams

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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521 92, 521154, 521907, C08J 900

Patent

active

060840021

ABSTRACT:
A cured silicone foam exhibiting high flame resistance and forming hard chars on burning, contains from about 1 to 60 percent by weight of wollastonite mineral, based on the weight of the composition. The silicone foam can be formed from any of the curable polyorganosiloxane foam-forming compositions known in the art. Preferred are those polyorganosiloxane foams cured using a platinum group metal catalyst. In a preferred composition the silicone foam is formed by curing a composition comprising a liquid polyorganosiloxane containing an average of at least two alkenyl radicals per molecule, an organohydrogensiloxane containing at least three silicon-bonded hydrogen atoms per molecule, a hydroxyl-containing compound, wollastonite, and a platinum catalyst.

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