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    • 7. 发明专利
    • Aqueous polyurethane resin dispersion and use of the same
    • 水性聚氨酯树脂的分散和使用
    • JP2013241618A
    • 2013-12-05
    • JP2013161390
    • 2013-08-02
    • Ube Industries Ltd宇部興産株式会社
    • HIRAKAWA TAKAFUMISHIMAZAKI YOHEIOHIDA SATOSHI
    • C08G18/66C08G18/00C08G18/75
    • PROBLEM TO BE SOLVED: To provide an aqueous polyurethane resin dispersion which can form a coating film excellent in adhesion between a substrate and a topcoat and having high strength.SOLUTION: An aqueous polyurethane resin dispersion is prepared by dispersing in an aqueous medium a polyurethane resin obtained by reacting a chain extender (B) containing a dibasic acid dihydrazide with a polyurethane prepolymer (A) obtained by reacting a polyisocyanate compound (a) containing an isophorone diisocyanate and a polyol compound (b) containing a polycarbonate polyol (b1) and an acid group-containing polyol (b2). A coating composition contains the aqueous polyurethane resin dispersion. A coating substrate is obtained by applying the aqueous polyurethane resin dispersion or the coating composition to a substrate and curing it to form a coating film. A coating substrate further includes a topcoat layer on the coating film.
    • 要解决的问题:提供一种水性聚氨酯树脂分散体,其可以形成基材和面漆之间的粘合性优异并且具有高强度的涂膜。溶液:通过在水性介质中分散聚氨酯树脂制备水性聚氨酯树脂分散体 通过使含有二元酸二酰肼的增链剂(B)与含有异佛尔酮二异氰酸酯的多异氰酸酯化合物(a)和含有聚碳酸酯多元醇(b1)的多元醇化合物(b)反应得到的聚氨酯预聚物(A) 含酸基的多元醇(b2)。 涂料组合物含有水性聚氨酯树脂分散体。 通过将水性聚氨酯树脂分散体或涂料组合物涂布在基材上并使其固化形成涂膜,得到涂布基材。 涂层基底还包括涂膜上的顶涂层。