Low density foams

Details Low density foams Low density foams

C - Chemistry, Metallurgy

08

L

403/51

C08L 83/05 (2006.01) C08J 9/02 (2006.01) C08L 83/06 (2006.01) C08L 83/07 (2006.01)

Patent

CA 1267750

ABSTRACT OF THE DISCLOSURE Silicone flexible foams of good fire-resistance and extremely low density from about 5 to 14 lbs/ft.3, having good mechanical and physical properties, are provided. The curable and foamable compositions are prepared from a multi-component mixture comprising, as part A, a high molecular weight uncured vinyl-terminated siloxane polymer, a polydimethyl silanol terminated reactive diluent, and an inorganic filler to improve fire resistance, water and a complex platinum catalyst, and as part B, a polydimethyl hydrogen siloxane. The viscosity of part A of the mixture prior to gelling and foaming is from about 30,000-65,000 cps. This mixture becomes foamable and curable at ambient temperature.

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