Polyamide-polyurea containing polymers are disclosed that are derived from the reaction of (A) an organic polyisocyanate: (B) an organic compound having at least two active hydrogen containing groups; and (C) from 15 to 160 parts per 100 parts of said (B) of a chain extender combination comprising (i) a particular enamine and (ii) an aromatic diamine and optionally (iii) an extender diol wherein the ratio of equivalents of (A) to total equivalents of (B) and (C) is within the range of from 0.90:1 to 1.10:1. The polymers find particular utility in the preparation of RIM parts having excellent physical properties. At the same time, the polymers are characterized by slower gel times than prior art aromatic diamine extended polymers thereby allowing the filling of larger molded parts.
本发明公开了含有聚酰胺-聚
脲的聚合物,该聚合物由以下物质反应制得:(A) 有机多
异氰酸酯:(B) 具有至少两个活性含氢基团的有机化合物;(C) 每 100 份所述(B)中含有 15 至 160 份扩链剂组合,该扩链剂组合包括(i) 特定烯胺和(ii) 芳香族二胺,以及可选的(iii) 扩链剂二元醇,其中(A)的当量与(B)和(C)的总当量之比范围为 0.90:1 至 1.10:1。90:1 至 1.10:1。这种聚合物在制备具有优异物理性能的 RIM 部件时特别有用。同时,这种聚合物的凝胶时间比现有技术中的芳香族二胺延伸聚合物慢,因此可以填充较大的模制部件。