Patent ID: 8962136
Filing Date: 2015-02-24
Classification: C08G,C09J,Y10T

Abstract:
1. A surface-protecting pressure-sensitive adhesive sheet, comprising: a substrate; and a pressure-sensitive adhesive layer that is provided on at least one side of the substrate and made from a polyester-based pressure-sensitive adhesive composition comprising a crosslinking agent and a polyester comprising at least a lactic acid unit, a dibasic acid unit, and a glycol unit, wherein the dibasic acid unit comprises a dimer acid, the polyester has a weight average molecular weight of 20,000 to 200,000 and a glass transition temperature of −70 to −20° C. as measured using a differential scanning calorimeter at a temperature rise rate of 20° C./minute, the polyester-based pressure-sensitive adhesive composition has a hydroxyl value of 20 to 60 mgKOH/g, the pressure-sensitive adhesive layer has a gel fraction of 85 to 99% by weight, and the pressure-sensitive adhesive layer has a storage modulus of 1×10