| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aqueous two-pack type curing composition forming a cured film with excellent appearance even by using a low water-dispersible isocyanate. Ž<P>SOLUTION: The aqueous two-pack type curing composition comprises an acrylic polyol aqueous dispersion and a polyisocyanate compound having a sulfonic acid group. The acrylic polyol aqueous dispersion is obtained by dispersing acrylic polyol, which is obtained by polymerization including solution polymerization for producing a core and solution polymerization for producing a shell, in water. A hydroxyl value and an acid value of the whole monomer mixture used in the polymerization are within a predetermined range, a hydroxyl value and an acid value of a monomer mixture (a-2) used in the polymerization of the shell are within a predetermined range, and a ratio of a hydroxyl value of a monomer mixture (a-1) used in the polymerization of the core to the hydroxyl value of the monomer mixture (a-2) is 1.3-3.0. In the polyisocyanate compound, an acid value is 5-12 mgKOH/g, and a content of isocyanate groups is 16-22 mass%. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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