| abstract |
PROBLEM TO BE SOLVED: To provide a coating having an improved level of carboxylate functionality and having a film hardness, flexibility, good water resistance and abrasion resistance, and excellent solvent resistance when crosslinked with an appropriate crosslinking agent. A polyurethane dispersion and a coating composition using the same are provided. A) A first polyol, a second polyol having a carboxylic acid functional group, and a polyisocyanate are reacted to produce an isocyanate functional prepolymer having an acid functional group. B) If necessary, the pre-polymer A polyurethane dispersion prepared by reacting an amino acid with a polymer, the polyurethane dispersion as the first component (i), and a second component (ii) containing a polyurethane crosslinking agent not containing a free isocyanate group A coating composition comprising. [Selection figure] None |