Patent ID: 7193010

Claim:
A separable fastener coated with a resin composition on a back surface thereof, wherein the resin composition is a dried, heat treated or both dried and heat treated aqueous dispersion of a polyurethane resin, said aqueous polyurethane resin of a dispersion obtained by reacting at least one macromolecular polyol, at least one organic polyisocyanate, a chain extending agent and 2,2-dimethylolbutanoic acid, and, optionally, an aqueous dispersion of an acrylic resin, wherein the polyurethane resin has an inherent viscosity (η inh ) measured at a concentration of 0.5 g/dL in dimethylformamide solution from 0.2 to 0.7 dL/g when the resin composition consists essentially of a polyurethane resin and wherein a film obtained by heat treatment at 80° C. for 8 hours after drying the resin has an elastic modulus at 25° C. of 8.0×10 6 to 5.0×10 8 Pa, and the elastic modulus at 80° C. of said film is 8.0×10 7 Pa or less.