Patent ID: 7265188

Claim:
A polyester blend composition comprising: (a) from about 70% to about 30% by weight of a polyhydroxyalkanoate copolymer comprising at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure (I): wherein R 1 is H, or a C1-C2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit comprises at least one monomer selected from the group consisting of the structures (II) and (III): wherein R 2 is a C3-C19 alkyl or C3-C19 alkenyl, and wherein m is from about 2 to about 16; and (b) from 30% to about 70% by weight of an aliphatic ester polycondensate synthesized from an aliphatic polyhydric alcohol and an aliphatic polycarboxylic acid compound, wherein the weight average molecular weight of the ester polycondensate is from about 50,000 to about 500,000.