Aqueous polyurethane dispersion

Abstract

To provide an aqueous polyurethane dispersion which is excellent in storage stability and little changes in color.SOLUTION: An aqueous polyurethane dispersion is provided, including (a) an organic polyisocyanate compound having two or more of isocyanate groups in one molecule, (b) polycarbonate diol, and (c) water-dispersible polyurethane which is a reaction product of a carboxyl group and / or sulfone group-containing polyol or its salt, and water, wherein the component (b) is a polycondensation product obtained by ester exchange reaction of a dihydroxy compound and a carbonate, a number average molecular amount of the component (b) is 250 or more and 3,000 or less, the component (b) contains 1 ppm or more and 25 ppm or less of specific metal (M1), and the component (b) has a Hazen color number of 50 or less.SELECTED DRAWING: None