The present invention relates to a process for the production of stable dispersions by reacting (I) an organic polyisocyanate with (II) a member selected from the group consisting of polyamines containing primary and/or secondary amino groups, hydrazines, hydrazides and mixtures thereof, in the presence of (III) hydroxyl group containing materials selected from the group consisting of polyethers; polyesters, polyester amides, polycarbonates and mixtures thereof, the improvement wherein:
(A) said polyisocyanate is a liquid reaction product of an organic di- and/or polyisocyanate and a compound containing at least one hydroxyl group, said reaction product having an isocyanate group content of from about 5 to about 45 percent by weight, and
(B) said polyisocyanate and said component II are reacted in an isocyanate to amine equivalent ratio of from 0.8:1 to 1.35:1.
本发明涉及一种通过使(I)有机多
异氰酸酯与(II)选自由含伯
氨基和/或仲
氨基的
多胺、
肼、
肼酰胺及其混合物组成的组中的成员,在(III)选自由聚醚、聚酯、聚酯酰胺、聚
碳酸酯及其混合物组成的组中的含羟基的材料存在下反应来生产稳定分散体的工艺,其改进之处在于:
(A) 所述多
异氰酸酯是有机二
异氰酸酯和/或多
异氰酸酯与含有至少一个羟基的化合物的液态反应产物,所述反应产物的
异氰酸酯基含量约为 5%至约 45%(按重量计),以及
(B) 所述多
异氰酸酯和所述组分 II 以 0.8:1 至 1.35:1 的
异氰酸酯与胺当量比反应。