- Hydroxy and amino functional pyrrolizidine catalyst compositions for the production of polyurethanes
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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: STR1 where R1 and R2 independently are --H, --OH, STR2 or --NR4 R5, 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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