Hydroxy and amino functional pyrrolizidine catalyst compositions

Details Hydroxy and amino functional pyrrolizidine catalyst compositions Hydroxy and amino functional pyrrolizidine catalyst compositions

1994-02-22

1996-04-30

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521129, 521163, 521166, 521902, 528 54, 528 49, 528 73, 528 74, 528 85, 544193, 544222, 560 24, 560 25, 560 26, 560115, 560157, 560158, 560330, 560355, 560358, 564 32, C08J 904, C08G 1820, C08G 1830, C08G 1832, C07D25134, C07C26902, C07C27302

Patent

active

055126030

ABSTRACT:
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 R.sub.1 and R.sub.2 independently are --H, --OH, ##STR2## or --NR.sub.4 R.sub.5, R.sub.3 is hydrogen, a C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl, or C.sub.7 -C.sub.11 arylalkyl group, and

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