Patent ID: 6096809
Filing Date: 2000-08-01
Classification: B29K,C08L

Abstract:
A composition of matter that is at least partially biodegradable comprising:thermoplastic starch formed by mixing starch and at least one plasticizing agent under conditions that result in the formation of a thermoplastic melt so that the thermoplastic melt has a water content of less than 5% while in a melted state, wherein the plasticizing agent is selected from the group consisting of glycerin, sorbitol, sugar alcohols, hydroxy acids, playvinyl alcohol, and mixtures thereof; andat least one polymer selected from the group consisting of aromatic polyesters, polyester copolymers having both aliphatic and aromatic blocks, polyester amides, polyethylene oxide polymers, polyglycols, and polyester urethanes,wherein the composition is formed by melting and mixing the thermoplastic starch and the at least one polymer under conditions that reduce or maintain the water content of the composition at less than about 1% by weight while in a melted state.