Patent ID: 9458364
Filing Date: 2016-10-04
CPC Classification: C08F,C08G,C08L,C09J,Y10T

Claim Text:
1. A pressure sensitive adhesive sheet, comprising a base material having an adhesive layer provided on at least one surface thereof, wherein: the adhesive layer comprises a pressure sensitive adhesive comprising (A) an acrylic copolymer having a crosslinkable functional group, and (B) a urethane resin; wherein said urethane resin (B) is a product obtained by allowing an isocyanate-terminated urethane prepolymer obtained by a reaction between [b1] a diol and [b2] a polyvalent isocyanate compound to react with [b3] a chain extender comprising [b4] at least one compound selected from the group consisting of an aliphatic diol, an alkanolamine, a bisphenol and a phenolamine, and [b5] a compound having three or more groups selected from hydroxyl groups and amino groups in a proportion of [b4] and [b5] represented by [b4]/[b5] of from 7/3 to 9/1 in terms of a mass ratio, a proportion of said acrylic copolymer (A) and said urethane resin (B) represented by (A)/(B) is from 40/60 to 1/99 in terms of a mass ratio, and a sum of hydroxyl groups and amino groups in each compound of [b4] is two groups.