AQUEOUS POLYURETHANE RESIN DISPERSION, MANUFACTURING METHOD FOR SAME, AND PAINT COMPOSITION CONTAINING SAME

摘要

Disclosed is an aqueous polyurethane dispersion with superior wear resistance as a coating film. Provided is an aqueous polyurethane resin dispersion in which a polyurethane resin, which is obtained by reacting a polyurethane polymer (A)-which is obtained by reacting (a) a polyisocyanate compound, (b) a polyol compound containing a polycarbonate polyol with an alicyclic structure, and (c) an acidic-group-containing polyol compound-with a chain extender (B) that is reactive with the isocyanate group in the polyurethane polymer (A), is dispersed in a water-based vehicle, wherein the alicyclic structure content is 26.0 to 60.0% by weight based on the solids content, and the total of the urethane bond content and urea bond content is 17.7 to 30.0% by weight based on the solids content.