Patent ID: 8183330

Claim:
A thermoplastic polyurethane which is comprised of the one-shot reaction product of (1) a hydroxyl terminated intermediate, (2) an aromatic diisocyanate, and (3) a glycol chain extender selected from the group consisting of ethylene glycol and propylene glycol; wherein the hydroxyl terminated intermediate is a hydroxyl terminated polyester intermediate comprised of repeat units that are derived from (i) an esterification reaction of two different glycols with one or more dicarboxylic acids or anhydrides, or (ii) a transesterification reaction of two different glycols with one or more esters of dicarboxylic acids; wherein the thermoplastic polyurethane has a weight average molecular weight of at least 100,000 Daltons; wherein the thermoplastic polyurethane includes hard segments that are the reaction product of the aromatic diisocyanate and the glycol chain extender; and wherein the hard segments represent from 10 weight percent to 40 weight percent of the total weight of the thermoplastic polyurethane; and wherein the thermoplastic polyurethane is substantially void of plasticizers and has a 5 seconds Shore A durometer of less than 70 as measured according to ASTM D2240.