Inventors:
Richard V. C. Carr - Allentown PA
Kevin R. Lassila - Allentown PA
Mark L. Listemann - Whitehall PA
Lisa A. Mercando - Pennsburg PA
Kristen E. Minnich - Allentown PA
Ann C. L. Savoca - Bernville PA
Amy L. Wressell - Allentown PA
Assignee:
Air Products and Chemicals, Inc. - Allentown PA
International Classification:
C08J 904
C08G 1820
C08G 1830
C08G 1832
C07D25134
C07C26902
C07C27302
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 R. sub. 4 and R. sub. 5 independently represent H, a C. sub. 1 -C. sub. 12 alkyl group, C. sub. 5 -C. sub. 10 cycloalkyl, C. sub. 6 -C. sub. 10 aryl, or C. sub. 7 -C. sub. 11 arylalkyl group, provided that at least R. sub. 1 or R. sub. 2 is not hydrogen.