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

摘要

An aqueous polyurethane resin dispersion produced by dispersing, in an aqueous medium, a polyurethane resin that is obtained by causing a chain extender (B) to react with a polyurethane prepolymer (A) obtained by causing a polycarbonate polyol (a) having an alicyclic structure in the main chain thereof, to react with an acidic group-containing polyol compound (b), and, if necessary, a polyol (c) other than (a) and (b), and a polyisocyanate (d), wherein the content of carboxylic acid group in the polyurethane prepolymer (A) is 2.0 to 13.0 weight %, and the total hydroxyl group equivalent of the polycarbonate polyole (a) having the alicyclic structure in the main chain thereof, the acidic group-containing polyol compound (b), and, if necessary, the polyol (c) other than (a) and (b), is 70 to 270.