Patent ID: 6485825
Filing Date: 2002-11-26
Classification: C08G,C09J,Y10T

Abstract:
A pressure-sensitive adhesive tape or sheet prepared by laminating a pressure-sensitive adhesive layer onto one side of an urethane resin layer consisting of 100 weight parts of a polyol component and A weight parts of a polyisocyanate component with a distance between cross-links (weight average molecular weight/number of isocyanate groups) of 220-570, wherein the aforementioned A is represented by the following equationA=100aX/Y (in this equation, a is a constant 0.067-0.135, X is the hydroxide value of the aforementioned polyol component, and Y is the weight percent concentration of isocyanate groups in the polyisocyanate component), and, at 5Â° C. and 35Â° C., the strength at a 2% elongation is 0.40-2.20 Kg/15 mm-width and the breaking elongation is 50-300%,wherein the polyol component is acryl polyol with a glass transition temperature (Tg) of 0-100Â° C. and a hydroxide group value of 20-150.