| 摘要 |
<p>BETA-AMINO CARBONYL CATALYSTS FOR POLYURETHANE PREPARATION Provided as catalysts for the formation of cellular urethane polymers ranging from flexible to rigid foams, are beta-amino carbonyl compounds wherein carbonyl is present as an amido or carboxylic acid ester group ant the beta-amino group is present as dialkylamino or an N- morpholino or N,N'-piperazino heterocyclic nucleus. Effective in the catalysis of the water isocyanate reaction, these beta-amino amides and beta-amino esters are used with particular advantage in the manufacture of water-blown flexible foams, both molded and free-rise, including high-resilience and flame-retarded foam. The beta-amino carbonyl catalysts allow for the formation of foam products essentially free of the odor associated with amines such as Nethylmorpholine. In view of this highly desirable characteristic and their other beneficial properties, the catalysts of the invention are advantageously employed as direct replacements for N-ethylmorpholine in high-resilience and other foam formulations. S P E C I F I C A T I O N 1.</p> |
