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    • 71. 发明授权
    • Method of preparing an aliphatic polyurea spray elastomer system
    • 制备脂族聚脲喷雾弹性体体系的方法
    • US06013755A
    • 2000-01-11
    • US815154
    • 1997-03-11
    • Dudley J. Primeaux, IIRobert L. ZimmermanKenneth M. Hillman
    • Dudley J. Primeaux, IIRobert L. ZimmermanKenneth M. Hillman
    • C08G18/10C08G18/38C08G18/48C08G18/50C08G18/32C08G18/46
    • C08G18/5024C08G18/10C08G18/3821C08G18/4804C08G2150/50
    • This invention concerns a method for the preparation of polyurea elastomers, comprising: (a) reacting an amine chain extender with dialkyl maleate to form an aspartic ester, wherein the chain extender has a molar amount of amine groups that is less than the moles of dialkyl maleate; (b) blending the aspartic ester with one or more polyoxyalkyleneamines to prepare a resin blend; (c) contacting the resin blend with an isocyanate under conditions effective to form a polyurea elastomer. This invention also concerns a a polyurea elastomer, comprising the reaction product of (a) a resin blend containing one or more polyoxyalkyleneamine and an aspartic ester and (b) an isocyanate, wherein the aspartic ester in the resin blend comprises a reaction product of an amine chain extender and a dialkyl maleate, wherein the mole ratio of amine functionality in the amine chain extender to dialkyl maleate or fumarate is greater than 1:1.
    • 本发明涉及一种制备聚脲弹性体的方法,包括:(a)使胺扩链剂与马来酸二烷基酯反应形成天冬氨酸酯,其中扩链剂的摩尔量小于二烷基 马来酸盐 (b)将天冬氨酸酯与一种或多种聚氧化烯胺混合以制备树脂共混物; (c)在有效形成聚脲弹性体的条件下使树脂共混物与异氰酸酯接触。 本发明还涉及一种聚脲弹性体,其包含(a)含有一种或多种聚氧化烯胺和天冬氨酸酯的树脂共混物和(b)异氰酸酯的反应产物,其中树脂共混物中的天冬氨酸酯包含胺 扩链剂和马来酸二烷基酯,其中胺扩链剂中胺官能度与马来酸二烷基酯或富马酸盐的摩尔比大于1:1。