Patent ID: 7977397

Claim:
A thermoplastic composition comprising: a polymer blend of: at least one alkenyl aromatic polymer in the amount between about 10 to 90 percent by weight of the blend; at least one bio-based or biodegradable polymer selected from polylactic acid and copolymers thereof or polyglycolic acid and copolymers thereof in the amount between about 10 to 90 percent by weight of the blend; and at least two blend compatibilizers comprising a first blend compatibilizer selected from the group consisting of styrene-ethylene-butene-styrene and maleated styrene-ethylene-butene-styrene and a second blend compatibilizer selected from the group consisting of styrene-maleic anhydride copolymer and styrene-methyl methacrylate copolymer, wherein the polymer blend comprises at least about 0.2 percent by weight of the first blend compatibilizer and at least about 0.5 percent by weight of the second blend compatibilizer, and up to about 10 weight percent of the at least two blend compatibilizers, collectively.