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    • 90. 发明授权
    • Polyurethane compositions derived from polyols containing a controlled
distribution of carboxamide groups
    • 衍生自含有受控分配的羧酰胺基团的多元醇的聚氨酯组合物
    • US4248994A
    • 1981-02-03
    • US48395
    • 1979-06-14
    • William H. Cook
    • William H. Cook
    • C08G18/50C08G18/60C08G18/32
    • C08G18/5039C08G18/606
    • Polyols containing at least one carboxamide group, --[NHC.dbd.O]--, in the polyol backbone impart to polyurethane resin-forming systems a unique combination of normal pot life and accelerated curing characteristics without sacrifice of final physical properties. Methods are given for preparation of such polyols which enable incorporation of a small, predetermined number of such carboxamide groups, not exceeding in number the hydroxyl functionality of the polyol, into each and every individual polyol molecule. The rapid-curing/property-development characteristics of derived polyurethane resin-forming systems are especially valuable in molding operations, where both mold cycle times and curing energy requirements are substantially reduced in comparison with conventional polyurethane resin-forming systems having similar final physical properties.
    • 在多元醇骨架中含有至少一个羧酰胺基团的多元醇 - [NHC = O] - 赋予聚氨酯树脂形成体系在正常适用期和加速固化特性的独特组合,而不牺牲最终物理性能。 给出了制备这种多元醇的方法,其使得能够将小的,预定数量的这种羧酰胺基团(不超过多元醇的羟基官能度)并入每个单独的多元醇分子中。 衍生的聚氨酯树脂形成系统的快速固化/性能开发特性在成型操作中特别有价值,与具有相似最终物理性能的常规聚氨酯树脂形成系统相比,模具循环时间和固化能量要求都显着降低。