Biodegradable polymer composition for the manufacture of articles having a high heat deflection temperature

Biodegradable polymeric composition for preparing articles having high heat deflection temperature comprising:

• i) 50-95% by weight, based on the sum of components i. and ii., of a polyester of lactic acid;
• ii) 5-50% by weight, based on the sum of components i. and ii., of at least one aliphatic-aromatic polyester (AAPE) comprising a dicarboxylic component and a dihydroxylic component which comprise the following structural units:
• -[—O—(R11)-O—C(O)—(R13)-C(O)—]-
• -[—O—(R12)-O—C(O)—(R14)-C(O)—]-
• wherein the dihydroxylic component comprises units —O—(R11)-O— and —O—(R12)-O— deriving from diols, wherein R11 and R12 are the same or different and are selected from the group consisting of C2-C14 alkylenes, C5-C10 cycloalkylenes, C2-C12 oxyalkylenes, heterocyclic groups and mixtures thereof, wherein the dicarboxylic component comprises units —C(O)—(R13)-C(O)— deriving from aliphatic diacids and units —C(O)—(R14)-C(O)— deriving from aromatic diacids, wherein R13 is selected from the group consisting of C0-C20 alkylenes and their mixtures and the molar percentage of the units deriving from aromatic diacids is higher of 50% and lower than 70% of the dicarboxylic component.
• iii) 1-25% by weight, with respect to the total weight of the biodegradable polymer composition, of cellulose fibres;
• iv) 1-10% by weight, with respect to the total weight of the biodegradable polymer composition, of a nucleating agent selected from polyesters comprising repeating units of 1,4-butylene succinate, talc and mixtures thereof.