Polyether polyol formulations for hard cfc replacement by...

Details Polyether polyol formulations for hard cfc replacement by... Polyether polyol formulations for hard cfc replacement by...

C - Chemistry, Metallurgy

08

G

C08G 18/28 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01) C08G 18/54 (2006.01) C08G 18/64 (2006.01) C08J 9/08 (2006.01)

Patent

CA 2004727

ABSTRACT Rigid closed-cell polyisocyanate-based foams are prepared by the reaction of polyisocyanate with a polyol composition having an average hydroxyl number of 100 to 500 and comprising at least one polyol component containing from 4 to 8 active hydrogen atoms per molecule and having a hydroxyl number of from 100 to 500. The blowing of the foam is essentially with carbon dioxide generated from the reaction of water with poly- isocyanate so as to provide foams of the desired density containing at least 40 mole percent carbon dioxide in their cells. 37,095-F

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