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    • 8. 发明专利
    • Aqueous polyurethane composition and its preparation method
    • 水性聚氨酯组合物及其制备方法
    • JP2006104226A
    • 2006-04-20
    • JP2004288505
    • 2004-09-30
    • Mitsui Takeda Chemicals Inc三井武田ケミカル株式会社
    • SHIRAKI HIROYUKIKODA CHIKAKOMIYOSHI SHINJI
    • C08G18/80C08J3/03C08L75/04
    • PROBLEM TO BE SOLVED: To provide an aqueous polyurethane composition which has a good shelf stability and is capable of forming a cured coating film which is excellent in coating film strength, water resistance and solvent resistance through heat-curing, and a preparation method thereof.
      SOLUTION: The aqueous polyurethane composition is prepared by compounding a polyurethane resin containing at least one silanol group within a molecule with a block polyisocyanate. In the preparation method of the aqueous polyurethane composition, a hydrophilic urethane prepolymer is mixed with a hydrophilic block polyisocyanate, dispersed in water and subsequently subjected to chain elongation using a chain-elongation agent containing a hydrolyzable silicon group-containing compound.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供一种水性聚氨酯组合物,其具有良好的储存稳定性,并且能够形成通过热固化而具有优异的涂膜强度,耐水性和耐溶剂性的固化涂膜,以及制备 方法。 解决方案:水性聚氨酯组合物通过在分子内含有至少一个硅烷醇基团的聚氨酯树脂与嵌段多异氰酸酯混合来制备。 在水性聚氨酯组合物的制备方法中,将亲水性氨基甲酸酯预聚物与分散在水中的亲水性嵌段聚异氰酸酯混合,然后使用含有可水解含硅基团的化合物的链延长剂进行链延长。 版权所有(C)2006,JPO&NCIPI