Patent ID: 8436084

Claim:
An aqueous coating composition containing a polyester resin (A), a curing agent (B), a thickener (C) and a C6-14 hydrophobic solvent (D), wherein: the polyester resin (A) is obtained by reaction of an acid component and an alcohol component; the polyester resin (A) contains a straight-chain dicarboxylic acid (a-1) having a carbon number of 8 or more and a straight-chain diol (a-2) having a carbon number of 8 or more in an amount of 5 to 30 mass % in total, based on the gross amount of the acid component and the alcohol component used in the reaction; the polyester resin (A) has a hydroxy group value of 100 to 200 mg KOH/g, and an acid value of 8 to 22 mg KOH/g; the thickener (C) is a urethane-associated thickener containing a C8-36 hydrophobic group and/or a (meth) acrylate-copolymer-based thickener containing a C8-36 hydrophobic group; and the aqueous coating composition contains the thickener (C) in an amount of 0.01 to 3 mass %, and the hydrophobic solvent (D) in an amount of 4 to 20 mass %, based on the gross amount of the polyester resin (A) and the curing agent (B).