High equivalent weight polyester polyols for closed cell,...

Details High equivalent weight polyester polyols for closed cell,... High equivalent weight polyester polyols for closed cell,...

C - Chemistry, Metallurgy

08

G

C08G 63/12 (2006.01) B32B 5/18 (2006.01) C08G 18/42 (2006.01) C08J 9/14 (2006.01)

Patent

CA 2168831

A closed cell, rigid polymer foam which comprises the reaction product of a polyisocyanate and an isocyanate- reactive component in the presence of a catalyst and a hydrogen-containing blowing agent or a mixture of a hydrogen-containing blowing agent and at least one co- blowing agent wherein the isocyanate-reactive component comprises (a) a hydroxy terminated polyester having an equivalent weight greater than about 350, or (b) a mixture of the hydroxy terminated polyester with at least one other isocyanate-reactive compound. Foams prepared with the hydroxy terminated polyester have superior shrinkage resistance, strength and long-term insulating efficiency.

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