Patent ID: 7834127
Filing Date: 2010-11-16
Classification: C08G

Abstract:
1. A shaped article having improved resistance to degradation from exposure to lipids wherein the shaped article comprises an amorphous copolyester having an inherent viscosity (IV) of about 0.5 to 1.1 dL/g measured at a temperature of 25° C. at 0.5 g/dL concentration in a solvent mixture of symmetric tetrachloroethane and phenol having a weight ratio of symmetric tetrachloroethane to phenol of 2:3 and comprising: (1) a diacid component comprising about 90 to 100 mole percent terephthalic acid residues and 0 to about 10 mole percent isophthalic acid residues; and (2) a diol component consisting essentially of about 30 to about 70 mole percent 1,4-cyclohexanedimethanol residues and about 70 to about 30 mole percent neopentyl glycol residues; wherein the amorphous copolyesters comprises 100 mole percent diacid component and 100 mole percent diol component.