Abstract: An aqueous coating composition capable of forming a film having excellent water resistance, high hardness, excellent processability and excellent shelf stability, and the coating composition comprises:(a) 30 to 65 parts by weight of an aqueous acrylic resin, which is produced by copolymerizing monomers (i) to (v):(i) 25 to 35% by weight of at least one aromatic vinyl monomer,(ii) 25 to 45% by weight of at least one alkyl (meth)acrylate,(iii) 1 to 15% by weight of at least one .alpha.,.beta.-monoethylenically unsaturated carboxylic acid,(iv) 5 to 25% by weight of at least one hydroxyalkyl (meth)acrylate, and(v) 1 to 25% by weight of at least one N-alkoxymethyl (meth)acrylamide,(b) 20 to 50 parts by weight of an aqueous amino resin, and(c) 5 to 25 parts by weight of a polyol,provided that the total amount of the above (a), (b) and (c) is 100 parts by weight.

Abstract: An aqueous coating composition for cans which forms a coating having high hardness and a smaller organic solvent content and generates a smaller amount of fumes when baked at a high temperature, and which comprises, as a resin component,(A) an alkyl-etherified amino resin formed by attaching, on average, not less than three, per molecule of spiroguanamine or melamine, formaldehydes to spiroguanamine or a mixture of spiroguanamine with melamine under an addition or condensation reaction, and then alkyl-etherifying the resultant addition or condensation reaction product with methanol, ethanol or a mixture of these, and(B) an aqueous polyester or acrylic resin having a specific acid value and hydroxyl value and being soluble or dispersible in an aqueous medium in the presence of a volatile base.