Patent ID: 7629405
Filing Date: 2009-12-08
Classification: C08B,C08F,C08G,C08K,C08L

Abstract:
1. A melt extruded starch-polyester graft copolymer composition comprising: (a) a melt extruded, thermoplastic, pre-plasticized starch which is pre-plasticized with a polyhydric alcohol and a dibasic organic acid and (b) segments of an aliphatic-aromatic polyester grafted onto the pre-plasticized starch, the aliphatic-aromatic polyester comprising where a, b, and m are 2 to 8, and x/y is between 3/2 and 10/1; wherein the copolymer composition is formed by melt extruding a reaction mixture of the pre-plasticized starch and the polyester, the reaction mixture having been extruded with heating and venting of water and unreacted dibasic organic acid from the reaction mixture.