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    • 1. 发明授权
    • Thermoplastic polyurethaneurea elastomers
    • 热塑性聚氨酯脲弹性体
    • US5739252A
    • 1998-04-14
    • US657852
    • 1996-05-31
    • Stephan KirchmeyerHanns Peter MullerMartin UllrichUlrich Liesenfelder
    • Stephan KirchmeyerHanns Peter MullerMartin UllrichUlrich Liesenfelder
    • C08G18/00C08G18/08C08G18/30C08G18/32C08G18/65C08G18/10
    • C08G18/302C08G18/08C08G18/65
    • Thermoplastic polyurethaneurea elastomers prepared from organic polyisocyanates (A) and a mixture (B) containing Zerewitinoff active hydrogen atoms are disclosed. The mixture (B) is prepared from 1) 40 to 85 equivalent-% (relative to isocyanate groups in (A)) of one or more compounds having an average of at least 1.8 Zerewitinoff active hydrogen atoms and a number average molecular weight of 400 to 10,000, 2) 10 to 60 equivalent-% (relative to isocyanate groups in (A)) of water and 3) 0 to 45 equivalent-% (relative to isocyanate groups in (A)) of one or more chain extenders having an average of at least 1.8 Zerewitinoff active hydrogen atoms and a molecular weight of 62 to 400. The preparation process comprise mixing (A) and (B) in a static mixer under conditions in which no reaction occurs between (A) and (B), and reacting the mixture in a second static mixer. The resulting polyurethaneurea elastomer is useful for the production of moldings.
    • 公开了由有机多异氰酸酯(A)和含有Zerewitinoff活性氢原子的混合物(B)制备的热塑性聚氨酯脲弹性体。 混合物(B)由1)40至85当量%(相对于(A)中的异氰酸酯基团)制备的平均具有至少1.8兹列维诺夫活性氢原子和数均分子量为400的一种或多种化合物 至10,000,2)10至60当量%(相对于(A)中的异氰酸酯基团))和3)0至45当量%(相对于(A)中的异氰酸酯基团))的一种或多种扩链剂,其具有 平均为至少1.8兹列维诺夫活性氢原子,分子量为62至400.制备方法包括在(A)和(B)之间不发生反应的条件下,在静态混合器中混合(A)和(B) 并在第二静态混合器中使混合物反应。 所得的聚氨酯脲弹性体可用于制造模制品。