Patent ID: 7638591

Claim:
A polyetherester elastomer comprising about 25 to 59 weight percent of soft segments based on the total weight of the elastomer, wherein about 60 to 100 mole percent of the soft segments are poly(trimethylene ether) ester soft segments represented by the structure: and 41 to about 75 weight percent of hard segments based on the total weight of the elastomer, wherein about 80 to 100 mole percent of the hard segments are tetramethylene ester hard segments represented by the structure: wherein G represents the divalent radical remaining after the removal of the terminal hydroxy groups of poly(trimethylene ether) glycol having a number average molecular weight of about 500 to about 2500, and R is one or more divalent radicals remaining after removal of carboxyl functionalities from one or more corresponding dicarboxylic acid equivalents; and wherein the polyetherester has a tensile strength measured at 125° C. that is at least 30 percent of its tensile strength measured at 23° C.