Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet thereof

Abstract

A pressure-sensitive adhesive composition is described, which comprises a polyester having an improved molecular structure and can find wide applications, which polyester has both a good mechanical strength and a good flexibility, is obtained from starting material components essentially comprising an aliphatic diol having a carbonate structure in the main chain thereof, and at least one of a polyhydric alcohol having three or more hydroxyl groups and a polycarboxylic acid having three or more carboxyl groups, and has a number average molecular weight of 5,000 or more and a degree of dispersion of 2.2 or more.

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