Foam

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C - Chemistry, Metallurgy

08

G

403/13, 154/90

C08G 18/68 (2006.01) C08G 18/16 (2006.01) C08G 18/14 (1980.01)

Patent

CA 1183649

ABSTRACT A process of producing a modified polyester foam having a density of 0.5 to 40 pounds per cubic foot comprising mixing on a weight basis a polyol composi- tion A comprising unsaturated polyester resin dissolved in a copoly- merizable monomer containing 30-80% non-volatile matte on a weight basis, at least one urethane reaction catalyst, at least one polyisocyanate trimerization catalyst, at least one organic compound functional as a peroxide decomposition catalyst, at least one low molecular weight polyol, and at least one silicone surface active agent, and an isocyanate composition B comprising a polyisocyanate, at least one organic peroxide functional as an unsaturated polyester resin curing catalyst, and a urethane reaction catalyst, at least one of compositions A and B containing a blowing agent, and allowing said mixture to cream and foam as a result of the heat generated by the trimerization of the polyisocyanate and the urethane reaction between iso- cyanate groups and hydroxyl groups in the polyols and unsaturated polyester, said heat being sufficient to cause gas generation from the blowing agent and cross- linking of the unsaturated polyester with the copoly- merizable monomer. the products of the invention are especially suitable as foam board useful in building insulation.

414695

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