Patent ID: 6620869
Filing Date: 2003-09-16
Classification: C08L

Abstract:
A pellet composition comprising polyhydroxyalkanoate (PHA), wherein the PHA has a molecular weight greater than about 435,000, wherein the pellet composition is made by a method comprising the steps of melting, at about 160Â° C. or less, a composition comprising a PHA powder having a weight average molecular weight (Mw) greater than about 480,000, boron nitride, acetylbutylcitrate and an organophosphorous compound having the structural formula: where Râ€² is R or OH, and R is a branched or unbranched saturated C1-C30 group, a branched or unbranched unsaturated C2-C30 group, a C6-C30 aromatic group, or a saturated or unsaturated C6-C30 cycloaliphatic group; extruding a strand of the melted PHA composition; cooling and crystallizing the extruded strand; and cutting the strand into pellets, wherein the PHA pellet is no less than 70% of the molecular weight of the PHA powder.