| abstract |
(57) [Abstract] [Purpose] To provide a polyurethane-based water-based dispersion and a water-based coating having a film-forming ability with excellent bending workability, coin scratch resistance, and corrosion resistance. [Structure] Acid value of 50 equivalent / 10 6 g or more and 300 to Polyurethane resin (A), water-soluble organic compound (B), water (C) having a urethane bond concentration of 5,000 equivalents / 10 6 g An aqueous dispersion in which the neutralizing agent (D) satisfies the following formulas 2) to 4), and an aqueous coating composition using the same. Formula 2) A / B / C = 1-70 / 0-69 / 9-99 (weight ratio) Formula 3) B / (B + C) = 0-0.7 (weight ratio) Formula 4) D / (of A Acid value) = 0.1-20 (equivalent ratio) |