Method for preparing thermoplastic compositions based on plasticized starch and resulting compositions

摘要

The subject matter of the present invention is a starch-based composition comprising: (a) at least 51% by weight of a plasticized amylaceous composition comprising starch and a plasticizer for said starch, obtained by thermomechanically mixing granular starch and a plasticizer for said starch, (b) at most 49% by weight of at least one non-amylaceous polymer, and (c) a bonding agent having a molecular mass of less than 5000, comprising at least two functions, at least one which is capable of reacting with the plasticizer and at least another of which is capable of reacting with the starch and/or the non-amylaceous polymer, these amounts being expressed with respect to solids and relative to the sum of (a) and (b), a method for preparing such a composition and a thermoplastic composition obtained by heating such a composition.