AQUEOUS POLYURETHANE RESIN COMPOSITION

摘要

Provided is an aqueous polyurethane resin composition having excellent heat resistance and moist heat resistance when in the form of a cured product, and excellent drying performance. The present invention relates to an aqueous polyurethane resin composition which comprises an aqueous dispersion of a polyurethane resin (Y) that is obtained by further reacting a chain extender (D) with a hydroxyl group-containing compound (A) and a urethane prepolymer (X) obtained by reacting an isocyanate group-containing compound (B) and an acidic group-containing polyol (C), wherein: (A) comprises at least 80 parts by mass of at least one (A1) selected from the group consisting of polybutadiene polyol, hydrogenated polybutadiene polyol, polyisoprene polyol, and hydrogenated polyisoprene polyol in terms of 100 parts by mass of (A); (B) comprises aliphatic isocyanate (B1) and/or tolylene diisocyanate (B2); and the content of (D) is 1 to 12 parts by mass in terms of 100 parts by mass of (Y).