Patent ID: 6440553
Filing Date: 2002-08-27
Classification: C09J,Y10T

Abstract:
A pressure-sensitive adhesive sheet comprising a layer comprising a pressure-sensitive adhesive composition comprising a polymer having a polycarbonate structure having a repeating unit represented by the following formula: wherein R represents a straight chain or branched hydrocarbon group having from 2 to 20 carbon atoms;wherein said polymer comprises a polyester having a weight average molecular weight of at least 10,000, wherein said polyester is synthesized from a diol component comprising a polycarbonate diol and a dicarboxylic acid component comprising a dicarboxylic acid having an aliphatic hydrocarbon group of from 2 to 20 carbon atoms or an alicyclic hydrocarbon group, and said composition has a storage elastic modulus [Gâ€²] at room temperature of at least 2Ã—106 dyne/cm2, a storage elastic modulus [Gâ€²] at âˆ’30Â° C. of 3Ã—107 dyne/cm2 or lower and an adhesive strength at room temperature of at least 1 kg/20 mm width.