| abstract |
(57) [Summary] [Structure] The number average molecular weight obtained by ring-opening polymerization of ε-caprolactone to dimethylolalkanoic acid in an aqueous polyurethane resin containing a carboxyl group neutralized with a basic substance in the molecular chain. An aqueous polyurethane resin obtained by reacting a 250-5000 carboxyl group-containing polyester polyol with a polyisocyanate compound. [Effect] It is excellent in work environment during handling and application and excellent in drying property when applied, and it is even and stable. It is useful in a wide range of applications such as binders for paints and printing inks, and adhesives. |