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 and 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 N-ethylmorpholine. 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.
提供作为催化剂,用于形成从柔性到硬质泡沫的细胞
脲聚合物的是β-
氨基羰基化合物,其中羰基以酰胺或
羧酸酯基的形式存在,β-
氨基基团以二烷基
氨基或N-吗啉或N,N'-
哌嗪杂环核存在。这些β-
氨基酰胺和β-
氨基酯在催化
水-
异氰酸酯反应中具有良好的效果,特别适用于制造
水吹式柔性泡沫,包括模塑和自由发泡,以及高回弹性和阻燃泡沫。 β-
氨基羰基催化剂允许形成基本无
氨类化合物(如N-
乙基吗啡)气味的泡沫产品。鉴于这种高度理想的特性和其他有益的特性,发明中的催化剂可优选地用作高回弹性和其他泡沫配方中N-
乙基吗啡的直接替代品。