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    • 3. 发明授权
    • Novel polyurethane product
    • 新型聚氨酯产品
    • US4379904A
    • 1983-04-12
    • US371534
    • 1982-04-26
    • Benjamin S. EhrlichRichard W. Oertel, III
    • Benjamin S. EhrlichRichard W. Oertel, III
    • C08G18/40C08G18/48C08G18/66
    • C08G18/4018C08G18/4804C08G18/66
    • Improved thermoplastic polyurethane elastomers are disclosed which are the reaction product of 4,4'-methylene-bis(phenyl isocyanate); a polymeric diol; and an extender wherein the equivalent proportions of said diol to said extender fall within the range of about 1:2 to about 1:20 and the isocyanate to total hydroxyl equivalents are within the range of about 0.99:1 to 1.06:1, the improvement which comprises replacing at least about 15 percent by weight of said polymeric diol by a polyol selected from the class consisting of: (i) polyoxypropylene-polyoxyethylene glycols having a molecular weight of about 3500 to about 4500 and an ethylene oxide content of about 10 to about 60 percent by weight; (ii) polyoxypropylene-polyoxyethylene triols having a molecular weight from about 5000 to about 7000 and an ethylene oxide content of about 10 to about 40 percent by weight; and (iii) mixtures of (i) and (ii).The elastomers find particular utility in the manufacture of ski boots, hockey boots and automotive exterior panels, bumpers, fascia, and the like.
    • 公开了改进的热塑性聚氨酯弹性体,其是4,4'-亚甲基 - 双(苯基异氰酸酯)的反应产物; 聚合二醇; 和增量剂,其中所述二醇与所述增量剂的当量比例在约1:2至约1:20的范围内,异氰酸酯与总羟基当量的比例在约0.99:1至1.06:1的范围内,改进 其包括用选自以下的多元醇代替至少约15重量%的所述聚合二醇:(i)分子量为约3500至约4500的聚氧丙烯 - 聚氧乙烯二醇和约10至约10的环氧乙烷含量, 约60重量% (ii)分子量为约5000至约7000并且环氧乙烷含量为约10至约40重量%的聚氧丙烯 - 聚氧乙烯三醇; 和(iii)(i)和(ii)的混合物。 弹性体在制造滑雪靴,曲棍球靴和汽车外部面板,保险杠,面板等方面具有特别的用途。