Aqueous paint composition and method of manufacturing painted article

摘要

The first objective of the present invention is to provide an aqueous paint composition that can form a paint film with excellent smoothness, image clarity, adhesion and water resistance. This aqueous paint is characterized in comprising (A) an aqueous dispersion of an acrylic modified polyester resin, (B) a block polyisocyanate compound having a nonionic hydrophilic group, and (C) an aqueous dispersion of acrylic polymer fine particles.

主权项

1. An aqueous coating composition comprising:
an aqueous dispersion of an acryl-modified polyester resin (A); a blocked polyisocyanate compound having a nonionic hydrophilic group (B); and an aqueous dispersion of acrylic-based polymer fine particles; (C); wherein the blocked polyisocyanate compound (B) has at least one blocked isocyanate group selected from the group consisting of: blocked isocyanate groups of the following formula (I): wherein R1, R2, R4 and R5 independently represent a C1-12 hydrocarbon groupand R3 represents a C1-12 straight-chain or branched alkylene group; blocked isocyanate groups of the following formula (II): wherein R2, R3, R4 and R5 have the same definitions as above; and blocked isocyanate groups of the following formula (III): wherein R2, R3, R4 and R5 have the same definitions as above, and R6 represents a C1-12 hydrocarbon group; and any combination of said blocked isocyanate groups, and wherein the polyester resin of the acryl-modified polyester resin is obtained by reacting an acid component which comprises an acid anhydride group-containing unsaturated monomer and an alicyclic polybasic acid, with an alcohol component.