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    • 1. 发明公开
    • AQUEOUS POLYURETHANE RESIN DISPERSION
    • WÄSSRIGEPOLYURETHANHARZDISPERSION
    • EP2832756A1
    • 2015-02-04
    • EP13768014.6
    • 2013-03-28
    • UBE Industries, Ltd.
    • MORIKAMI, AtsushiNAIKI, MasahiroADACHI, FumioTAKAHASHI, ManabuMIYOSHI, Kenta
    • C08G18/12C08K5/17C08K5/24C08K5/33C08L75/04C09D5/02C09D175/04
    • C08G18/6659C08G18/0823C08G18/12C08G18/44C08G18/758C08K5/25C08K5/33C08K5/3445C09D175/12C08G18/285
    • The present invention provides an aqueous polyurethane resin dispersion wherein a polyurethane resin is dispersed in an aqueous medium, wherein the polyurethane resin is obtained by reacting (A) a polyurethane prepolymer with (B) a chain extender, wherein (A) the polyurethane prepolymer is obtained by reacting (a) a polyisocyanate compound, (b) a polyol compound, (c) an acid group-containing polyol compound, with (d) a blocking agent for isocyanate group, wherein the total of the content of urethane bonds and the content of urea bonds in the aqueous polyurethane resin dispersion is 8 to 13 wt % based on a solid content, the content of carbonate bonds in the aqueous polyurethane resin dispersion is 15 to 40 wt % based on the solid content, and the content of isocyanate groups wherein the blocking agent is bonded thereto in the aqueous polyurethane resin dispersion is 0.3 to 2.0 wt %, wherein an alkanedioic dihydrazide is contained as the chain extender.
    • 本发明提供一种水性聚氨酯树脂分散体,其中聚氨酯树脂分散在水性介质中,其中聚氨酯树脂通过(A)聚氨酯预聚物与(B)扩链剂反应得到,其中(A)聚氨酯预聚物为 其通过使(a)多异氰酸酯化合物,(b)多元醇化合物,(c)含酸基的多元醇化合物与(d)异氰酸酯基的封端剂反应而得到,其中氨基甲酸酯键的含量和 水性聚氨酯树脂分散体中的脲键含量为固体成分为8〜13重量%,水性聚氨酯树脂分散体中的碳酸酯键的含量相对于固体成分为15〜40重量%,异氰酸酯的含量 在水性聚氨酯树脂分散体中其中封端剂与其结合的基团为0.3〜2.0重量%,其中含有链烷二酰肼作为扩链剂。