Intumescent flexible polyurethane foam

Details Intumescent flexible polyurethane foam Intumescent flexible polyurethane foam

C - Chemistry, Metallurgy

08

K

403/9

C08K 3/22 (2006.01) C08G 18/40 (2006.01) C08J 9/00 (2006.01) C08K 5/00 (2006.01)

Patent

CA 1161199

ABSTRACT OF THE DISCLOSURE Flexible, resilient, polyurethane foam having improved flame re- tardancy and intumescent properties is prepared from a reaction mixture comprising a polyether polyol, an organic polyisocyanate, a blowing agent, a surfactant, a catalyst, a flame retardant, and hydrated alumina. Alterna- tively, the mixture also comprises a low-viscosity linear polyester. The hydrated alumina is predispersed in a mixture comprising flame retardant and low-viscosity linear polyester, and alternatively a char former and a fugitive viscosity modifier.

377300

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