Patent ID: 9040598
Filing Date: 2015-05-26
Classification: C08L

Abstract:
1. A thermoplastic composition comprising at least one rigid renewable polyester having a glass transition temperature of about 0° C. or more, at least one polymeric toughening additive, at least one interphase modifier, wherein the interphase modifier is present in an amount ranging from about 0.5 wt. % to about 15 wt. % based on the weight of the renewable polyester, and a polyepoxide modifier having a number average molecular weight of from about 7,500 grams per mole to about 250,000 grams per mole, wherein the thermoplastic composition has a morphology in which a plurality of discrete primary domains and voids are dispersed within a continuous phase, the domains containing the polymeric toughening additive and the continuous phase containing the renewable polyester, wherein the thermoplastic composition has a density of about 1.4 grams per cubic centimeter or less, and wherein the average percent volume of the composition that is occupied by the voids is from about 30% to about 70% per cubic centimeter.