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    • 73. 发明申请
    • AQUEOUS POLYURETHANE RESIN DISPERSION AND PROCESS FOR PREPARING THE SAME
    • 水性聚氨酯树脂分散体及其制备方法
    • US20110313101A1
    • 2011-12-22
    • US13203454
    • 2010-02-23
    • Atsushi MorikamiMasahiro NaikiFumio AdachiManabu Takahashi
    • Atsushi MorikamiMasahiro NaikiFumio AdachiManabu Takahashi
    • C09D175/04C08L75/04
    • C09D5/02C08G18/0823C08G18/12C08G18/44C08G18/6659C08G18/758C09D5/024C09D175/04C08G18/3231C08G18/3228
    • An aqueous polyurethane resin dispersion which can easily carry out repaint or removal of an extra coating film after coating on a substrate material is to be provided.It is an aqueous polyurethane resin dispersion which comprises a polyurethane resin obtained by reacting (A) a polyurethane prepolymer which is obtained by reacting (a) a polyisocyanate compound, (b) at least one polyol compound containing a poly-carbonate polyol having a number average molecular weight of 400 to 3000, (c) an acidic group-containing polyol compound, and (d) a blocking agent for an isocyanate group, which dissociates at 80 to 180° C., and (B) a chain elongating agent which has reactivity with the isocyanate group, being dispersed in an aqueous medium, a sum of a content of urethane bodings and a content of urea bondings is 7 to 18% by weight in terms of solid components, a content of carbonate bondings is 15 to 40% by weight in terms of solid components, and a content of an isocyanate group to which the above-mentioned blocking agent has bonded is 0.2 to 3% by weight in terms of solid components and calculated on the isocyanate group.
    • 本发明提供一种水性聚氨酯树脂分散体,其可以在涂布在基材上之后容易地进行再涂覆或除去多余的涂膜。 它是一种水性聚氨酯树脂分散体,其包含聚氨酯树脂,该聚氨酯树脂通过使(A)聚氨酯预聚物反应获得,所述聚氨酯预聚物是通过(a)多异氰酸酯化合物,(b)至少一种含有多个 平均分子量为400〜3000,(c)含酸性基团的多元醇化合物,(d)在80〜180℃下离解的异氰酸酯基封闭剂,(B)伸长剂 与异氰酸酯基具有反应性,分散在水性介质中,氨基甲酸酯胶的含量与尿素键的含量之和为固体成分的7〜18重量%,碳酸酯键合的含量为15〜40 以固体成分计的重量%,上述封端剂键合的异氰酸酯基的含量以固体成分计为0.2〜3重量%,并以异氰酸酯基计算。
    • 80. 发明申请
    • HYBRID POLYURETHANE BLOCK COPOLYMERS WITH THERMOPLASTIC PROCESSABILITY AND THERMOSET PROPERTIES
    • 具有热塑性加工性和热稳定性的混合聚氨酯嵌段共聚物
    • US20110028661A1
    • 2011-02-03
    • US12809212
    • 2008-12-18
    • Robert S. WardKeith R. McCreaYuan TianJim Yang
    • Robert S. WardKeith R. McCreaYuan TianJim Yang
    • C08F283/12
    • C08G18/3228C08G18/4812C08G18/61C08G18/6611
    • Block copolymers are formulated with multifunctional chain extenders. The block copolymers include a soft segment and a hard segment made from a diisocyanate, an alkylene diamine chain extender, and a multifunctional chain extender which provides delayed crosslinking. The multifunctional chain extenders have a functionality and typically have at least one OH group. The multifunctional chain extenders may be aliphatic or aromatic triols or polyols, or may have other configurations, as described. The resulting block copolymers have improved mechanical properties such as compression set. They may be used in medical applications, or in industrial applications such as seal and gasket applications, including O-rings, window seals, and automotive gaskets. The initially-formed polyurethane resin behaves as a thermoplastic processable material, while the configured end-use product is thermoset.
    • 嵌段共聚物用多功能扩链剂配制。 嵌段共聚物包括软链段和由二异氰酸酯制成的硬链段,亚烷基二胺扩链剂和提供延迟交联的多官能扩链剂。 多功能扩链剂具有官能团并且通常具有至少一个OH基团。 多官能增链剂可以是脂族或芳族三醇或多元醇,或者可以具有如所述的其它构型。 所得的嵌段共聚物具有改进的机械性能,如压缩永久变形。 它们可用于医疗应用或工业应用中,例如密封和垫片应用,包括O型圈,窗户密封件和汽车垫圈。 初始形成的聚氨酯树脂表现为热塑性可加工材料,而配置的最终用途产品是热固性的。