Importance

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Abstract

Described herein is a pressure sensitive adhesive comprising a polyurethane polymer derived from a polyester polyol and a polyisocyanate component, wherein the polyester polyol, which is derived from a first reaction product of

(a) a Component A, wherein the Component A is a phthalic acid, a phthalic anhydride or mixtures thereof,(b) a Component B, wherein the Component B is a dimer fatty acid, a dimer fatty acid diol or mixtures thereof, and(c) a Component C, wherein the Component C is an aliphatic diol, an aromatic diol, or mixtures thereof, wherein Component C comprises 2 to 10 carbon atoms and optionally catenated heteroatoms selected from O, S, and N. Also disclosed herein are polyurethane polymers and pressure sensitive adhesives made from the polyurethane polymers or the polyester polyols.

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First Claim