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    • 10. 发明授权
    • Cross-linked thermoplastic polyurethane/polyurea and method of making same
    • 交联热塑性聚氨酯/聚脲及其制造方法
    • US07417094B2
    • 2008-08-26
    • US10992907
    • 2004-11-18
    • Pijush K. DewanjeeJohn G. Guard
    • Pijush K. DewanjeeJohn G. Guard
    • C08G18/08
    • C08G18/0895C08G18/3814C08G18/7671C08L75/02
    • A cross-linked thermoplastic polyurea is formed by heating a mixture containing a thermoplastic urethane base material, a monomeric and/or polymeric di-isocyanate comprising between 1 to 10% of the total weight of the mixture, and a diamine comprising between 1 to 10% of the total weight of the mixture. A thermoplastic polyurethane may be formed by substituting hydroquinone for the diamine. The mixture is heated to a temperature within the range of 250° F. to 550° F. The heated mixture, which is flowable, is then injected into at least one injection molding device. The mixture is then cured at a temperature between 150° F. to 250° F. for a period of time between 2 and 36 hours. The cross-linked thermoplastic polyurethane/polyurea retains the excellent flowability characteristics of a thermoplastic urethane while the same time exhibits good abrasion, tensile strength, rebound, and compression set characteristics which are similar to those found in thermoset urethanes.
    • 交联的热塑性聚脲通过加热含有热塑性氨基甲酸酯基材料,包含混合物总重量的1至10%的单体和/或聚合二异氰酸酯的混合物和包含1至10个 混合物总重量的百分比。 可以通过用氢醌代替二胺来形成热塑性聚氨酯。 将混合物加热到250°F至550°F范围内的温度。然后将可流动的加热混合物注入至少一个注射成型装置中。 然后将混合物在150°F至250°F的温度下固化2至36小时之间的时间。 交联的热塑性聚氨酯/聚脲保留了热塑性聚氨酯的优异的流动性特征,同时表现出与热固性聚氨酯中发现的相似的良好的耐磨性,拉伸强度,回弹和压缩变形特性。