Patent ID: 6313105
Filing Date: 2001-11-06
Classification: C08K,C08L

Abstract:
A thermoplastic mixture based on starch for producing shaped biodegradable articles with improved mechanical properties, obtainable by preparing and mixingA) 100 parts by weight, calculated after correction to 0% water content, of any desired starch excluding dialdehyde starch which is native and/or chemically modified, fermentative, recombinant and/or prepared by biotransformation and/or of derivatives of the starches mentioned;B) from 1 to 100 parts by weight of dialdehyde starch which has a degree of oxidation of more than 30% and does not exhibit any iodine-starch reaction (blue coloration);C) an amount of from 1 to 100 parts by weight of water;D) an amount within the range from 2 parts by weight up to half of the total of the parts by weight of A) and B) of at least one plasticizer;E) if desired, other biopolymers, andF) if desired, up to (A) and (B)) parts by weight of other conventional additives;where the mixing of components A to F takes place with introduction of thermal and mechanical energy into the thermoplastic mixture.