Polyurethane-modified polyisocyanurate foam and method for...

Details Polyurethane-modified polyisocyanurate foam and method for... Polyurethane-modified polyisocyanurate foam and method for...

C - Chemistry, Metallurgy

08

G

403/13

C08G 18/48 (2006.01) C08G 18/09 (2006.01) C08G 18/16 (2006.01) C08G 18/54 (2006.01) C08G 18/61 (2006.01)

Patent

CA 1160399

- 28 - POLYURETHANE-MODIFIED POLYISOCYANURATE FOAM AND METHOD FOR PRODUCING THE SAME ABSTRACT OF THE DISCLOSURE A polyurethane-modified polyisocyanurate foam having an excellent heat-resistance and flame-resistance and a reduced smoke-generation, comprises a reaction product of a mixture containing (A) at least one polyisocyanate compounds; (B) at least one polyol compound including, benzylic ether type phenolic resin of the formula (1): Image (1) wherein R=H , hydrocarbon, oxyhydrocarbon or halogen, X = H or methylol, the molar ratio methylol/H ? 1, m+n ? 2 and m/m ? 1; p=1?3, (C) a trimerization catalyst, and; (D) a blowing agent, the ratio of the isocyanate equivalent of the isocyanate compound to the hydroxyl equivalent of the polyol compound being from 1.5 t 10.

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