Hydroxy and amino functional pyrrolizidine catalyst...

Details Hydroxy and amino functional pyrrolizidine catalyst... Hydroxy and amino functional pyrrolizidine catalyst...

C - Chemistry, Metallurgy

08

G

C08G 18/20 (2006.01) B01J 31/02 (2006.01) C08G 18/18 (2006.01)

Patent

CA 2142584

A method for preparing a polyurethane foam which comprises reacting an organic polyisocyanate and a polyol in the presence of a blowing agent, cell stabilizer and a catalyst composition consisting essentially of a pyrrolizidine of the formula: Image , where R1 and R2 independently are -H, -OH, Image , Image , or -NR4R5, R3 is hydrogen, a C1-C12 alkyl, C5-C6 cycloalkyl, C6-C10 aryl, or C7-C11 arylalkyl group, and R4 and R5 independently represent H, a C1-C12 alkyl group, C5-C10 cycloalkyl, C6-C10 aryl, or C7-C11 arylalkyl group, provided that at least R1 or R2 is not hydrogen.

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