Patent ID: 7790834

Claim:
A composition, comprising a copolymer comprising unsubstituted or R-substituted polytrimethylene carbonate-based segments and poly(trimethylene ether) glycol -based segments, the copolymer having the structure: wherein each R substituent is independently selected from the group consisting of H, C 1 -C 20 alkyl, C 3 -C 20 cyclic alkyl, C 5 -C 25 aryl, C 6 -C 20 alkaryl, and C 6 -C 20 arylalkyl, and wherein each R substituent can optionally form a cyclic structural group with adjacent R substituents; m is the number of trimethylene ether units and is an integer of 5 to 100, inclusive; and n is the number of trimethylene carbonate-units, and each n is an integer independently selected from integers of 1 to 50 inclusive.