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    • 2. 发明授权
    • Graft polymer dispersion in a mixture of low molecular weight polyols
and polyether polyols and polyurethane foams prepared therefrom
    • 在低分子量多元醇和聚醚多元醇和由其制备的聚氨酯泡沫的混合物中的接枝聚合物分散体
    • US4568705A
    • 1986-02-04
    • US737504
    • 1985-05-24
    • Oscar M. GraceSteven E. WujcikDuane A. Heyman
    • Oscar M. GraceSteven E. WujcikDuane A. Heyman
    • C08F290/06C08G18/63C08G18/14
    • C08G18/63C08F290/062
    • A low viscosity, stable graft polymer dispersion is prepared by polymerizing in the presence of a free radical initiator, from about 25 to about 75 weight percent based on the total weight of the dispersion, an ethylenically unsaturated monomer or mixture of monomers, in a polyol mixture comprising (1) from about 25 to about 99 weight percent of a polyol containing from 2 to 8 hydroxyl groups and having an equivalent weight from 30 to about 200, (2) from about 1 to about 75 weight percent of a macromer containing induced unsaturation, said macromer comprising the reaction product of a polyether polyol having an equivalent weight from 100 to 10,000 with a compound having both ethylenic unsaturation and a group selected from the group consisting of a hydroxyl, carboxyl, anhydride, isocyanate and epoxy or mixtures thereof. These graft polymer dispersions are useful for preparing polyurethane products.
    • 通过在自由基引发剂的存在下聚合制备低粘度,稳定的接枝聚合物分散体,其量为约25至约75重量%,基于分散体,烯属不饱和单体或单体混合物的总重量,在多元醇 混合物,其包含(1)约25至约99重量%的含有2至8个羟基并且具有30至约200当量的多元醇,(2)约1至约75重量%的含有诱导的大分子单体 所述大分子单体包括当量为100至10,000的聚醚多元醇与具有不同烯键式的化合物和选自羟基,羧基,酸酐,异氰酸酯和环氧基或其混合物的基团的反应产物。 这些接枝聚合物分散体可用于制备聚氨酯产品。