Patent ID: 7521523
Filing Date: 2009-04-21
Classification: C08G

Abstract:
1. A polyester composition comprising residues of 3-hexenedioic acid present in an amount from about 0.01 mole percent to about 50 mole percent and residues of terephthalic acid present in an amount of at least 50 mole percent, based on the total amount of residues of dicarboxylic acid in the polyester composition comprising 100 mole percent, and further comprising cobalt present in an amount from about 10 ppm to about 1,000 ppm, based on the total weight of the polyester composition, wherein the polyester composition is comprised of a polyethylene terephthalate homopolymer or copolymer having an It.V. of at least 0.75 dL/g.