| abstract |
A biodegradable polymer blend containing at least one component (A), at least one component (B) and at least one component (D), the component (A) comprising lactic acid-based polymers - the component (B) comprising thermoplastic starch (ATP) representing a mixture of starch, at least one plasticizer of the group of substances (C) and at least one agent of modification of the group of substances (E); the group of substances (C) comprising plasticizers for starch; the group of substances (E) comprising modifying agents; component (D) comprising homopolymers or copolymers of polyhydroxyalkanoates (PHAs) and / or mixtures thereof; corresponding and the biodegradable polymer mixture may optionally contain a component (F), the component (F) comprising plasticizers for PLA and / or PHA and the biodegradable polymer mixture is prepared such that a composition containing the constituents (A) ), (B) and (D) is prepared by mixing the constituents (A) and (B), the constituent (B) being present in the mixture at least in one phase of the mixing process where at least one constituent (B) and at least one component (A) is mixed simultaneously, and this phase of the mixing process precedes, by at least one phase, the phase of the mixing process where component (D) is added to the mixture and the constituents optional (F) and (G) may be added to the mixture in any one or more phases of the mixing process and in one or more doses. |