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    • 5. 发明授权
    • Polyether urea epoxy curing agent
    • 聚醚脲环氧固化剂
    • US4178427A
    • 1979-12-11
    • US875473
    • 1978-02-06
    • Harold G. WaddillHeinz Schulze
    • Harold G. WaddillHeinz Schulze
    • C08G18/50C08G59/40C08G71/02C08G59/50
    • C08G71/02C08G18/5021C08G59/4021Y10T428/31529
    • An improved curable epoxy resin composition of a vicinalpolyepoxide and an effective amount of a novel polyether urea curing agent is disclosed. The improved curable epoxy resins which are useful as coatings, castings, sealants, and adhesives show improved tensile shear strength, flexural strength, and ultimate elongation. The novel polyether urea curing agents of the instant invention are characterized by terminal primary amino groups and are formed by reaction of polyoxyalkylenepolyamines with urea, urea forming compounds, or bifunctional isocyanates.A preferred curing agent includes a mixture of a novel polyether urea formed by reaction of a polyoxypropylenepolyamine having a molecular weight of from about 200-2000 and an effective amount of urea; and another known epoxy resin curing agent such as polyoxyalkylenepolyamine in ratios of from about 5:1 to 1:5 by weight.
    • 公开了一种改进的邻位多环氧化物的可固化环氧树脂组合物和有效量的新型聚醚脲固化剂。 可用作涂料,铸件,密封剂和粘合剂的改进的可固化环氧树脂显示出改进的拉伸剪切强度,弯曲强度和极限伸长率。 本发明的新型聚醚脲固化剂的特征在于末端伯氨基,并通过聚氧亚烷基多胺与脲,脲形成化合物或双官能异氰酸酯反应形成。 优选的固化剂包括通过分子量为约200-2000的聚氧丙烯聚胺与有效量的脲反应形成的新型聚醚脲的混合物; 和另一种已知的环氧树脂固化剂如聚氧亚烷基多胺,其重量比为约5:1至1:5。