Rigid polyurethane foams with low thermal conductivities

Details Rigid polyurethane foams with low thermal conductivities Rigid polyurethane foams with low thermal conductivities

C - Chemistry, Metallurgy

08

G

C08G 18/66 (2006.01) C08G 18/40 (2006.01) C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08G 18/76 (2006.01) C08J 9/00 (2006.01)

Patent

CA 2053226

2053226 9113110 PCTABS00007 Disclosed are rigid cellular polyurethanes prepared by bringing together under foam forming conditions an aromatic polyisocyanate and a polyhydric combination comprising a major proportion of a crude polyester polyol and minor proportion of a cross-linking polyol. This selection of particular ingredients gives rise to foams having extremely low initial insulation K factor values.

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