| abstract |
To obtain water-based paint compositions which have outstanding storage stability and can also form paint films with outstanding appearance and water resistance. Water-based paint composition containing a hardener at 50-10 parts be weight to 50-90 parts by weight (solids) of an aqueous dispersion obtained by polymerising an aqueous dispersion of a polyurethane resin of a number-average molecular weight of 1000-50,000, an acid value from carboxyl groups of ≤ 50 mg KOH/g, a sulfonate group content of 0.05-0.6 mol/1000 g, an allyl content of 0.1-1.1 mol/molecule and an acetate tolerance of ≥ 5 in the aqueous dispersion with ethylenic unsaturated monomers in a proportion as a weight ratio of polyurethane resin/ethylenic unsaturated monomer of 5/95-60/40. |