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    • 8. 发明授权
    • Energetic copolyurethane thermoplastic elastomers
    • 能量共聚氨酯热塑性弹性体
    • US06479614B1
    • 2002-11-12
    • US09517458
    • 2000-03-02
    • Guy AmplemanAndre MaroisSylvain Desilets
    • Guy AmplemanAndre MaroisSylvain Desilets
    • C08G1850
    • C06B45/105C08G18/5021Y10S149/122
    • An energetic copolyurethane thermoplastic elastomer (ETPE) is prepared by polymerizing a dihydroxyl terminated telechelic energetic polymer having a functionality of two or less with a diisocyanate at a NCO/OH ratio of about 0.7 to 1.2. The resulting copolymer is easy to incorporate in gun propellant or explosive formulations and is recyclable. These energetic copolyurethane thermoplastic elastomers were obtained mainly by macropolymerization of GAP prepolymers with 4,4′-methylenebis-phenyl isocyanate (MDI). In these syntheses, GAPs having molecular weights of 500, 1000 and 2000 were used as macromonomers and polymerized with MDI to yield three different copolyurethane thermoplastic elastomers. This process may be applied to any dihydroxyl terminated energetic prepolymers. The hard segments of the ETPE are obtained by the formation of hydrogen bonds between the urethane groups.
    • 通过使官能度为2以下的二羟基封端的遥爪高分子聚合物与NCO / OH比约为0.7〜1.2的二异氰酸酯聚合,制备出能量高的共聚氨酯热塑性弹性体(ETPE)。 所得共聚物易于掺入喷枪或爆炸制剂中,并且是可回收利用的。 这些高分子聚氨酯热塑性弹性体主要通过GAP预聚物与4,4'-亚甲基双苯基异氰酸酯(MDI)的大分子聚合获得。 在这些合成中,使用分子量为500,1000和2000的GAP作为大分子单体,并与MDI聚合,得到三种不同的共聚氨酯热塑性弹性体。 该方法可以应用于任何二羟基封端的能量预聚物。 通过在氨基甲酸酯基团之间形成氢键,得到ETPE的硬链段。