Patent ID: 8476378

Claim:
Polymeric composition comprising A) a biodegradable aliphatic/aromatic copolyester (AAPE) comprising: a) an acid component comprising repeating units of: 50 to 60% of an aromatic polyfunctional acid; 40 to 50% of an aliphatic acid, at least 90% of which is a long-chain dicarboxylic acid (LCDA) of natural origin selected from azelaic acid, sebacic acid, brassylic acid or mixtures thereof; b) at least one diol component; said aliphatic long-chain dicarboxylic acid (LCDA) and said diol component (b) having a number of carbon atoms according to the following formula: ( CLCDA*YLCDA )/2 +CB·YB> 7.5 where: CLCDA is the number of carbon atoms of the LCDA and can be 9, 10 or 13; YLCDA is the molar fraction of each LCDA on the total number of moles of LCDA; Cb is the number of carbon atoms of each diol component; Yb is the molar fraction of each diol on the total number of moles of the diol component (b) said AAPE having: a biodegradability after 90 days higher than 70%, with respect to pure cellulose according to the Standard ISO 14855 Amendment 1; a density of equal to or less than 1.2 glee; a number average molecular weight Mn of 40,000-140,000; an inherent viscosity of 0.8-1.5; and B) at least one other polymer selected from other polyesters of the aliphatic/aromatic type or biodegradable polymers of natural origin or of synthetic origin.