Polyol compositions providing improved flame retardance and...

Details Polyol compositions providing improved flame retardance and... Polyol compositions providing improved flame retardance and...

C - Chemistry, Metallurgy

08

G

C08G 18/42 (2006.01) C08G 18/61 (2006.01) C08J 9/14 (2006.01) C08L 67/02 (2006.01)

Patent

CA 2188459

There is now provided a polyol composition containing a polyol having polyester linkages and a number average molecular weight of 400 or more, and at least about 8 php of a silicone-containing surfactant polymer. Either mixed into the polyol composition at the time of foaming, mixed into an isocyanate, or both, is an aliphatic or cycloaliphatic C4-C7 hydrocarbon. The polyol composition is used to make a polyisocyanate based closed cell rigid foam by reacting an organic isocyanate and the polyol composition in the presence of an aliphatic or cycloaliphatic C4-C7 hydrocarbon blowing agent. A method of making a polyisocyanate-based closed cell rigid foam using the inventive polyol is also disclosed.

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