| 摘要 |
PROBLEM TO BE SOLVED: To provide an aqueous polyurethane resin dispersion composition which, even when applied to a substrate of a metal or the like, can yield a coating film that suffers from little cracking, exhibits high hardness and has excellent solvent resistance and that can prevent the corrosion of a metal in the salt spray test.SOLUTION: There is provided the aqueous polyurethane resin dispersion composition in which a polyurethane resin (A) and a polyurethane resin (B) are dispersed in an aqueous medium, the polyurethane resin (A) being a polyurethane resin obtained by reacting an aliphatic polycarbonate polyol (aA), an acidic group-containing polyol compound (bA), a polyisocyanate compound (dA) and chain extender (eA), the polyurethane resin (B) being a polyurethane resin obtained by reacting polycarbonate polyol (aB) that has an alicyclic structure in a main chain, an acidic group-containing polyol compound (bB), a polyisocyanate compound (dB) and a chain extender (eB).SELECTED DRAWING: None |
