Patent ID: 8193300

Claim:
A biodegradable aliphatic/aromatic copolyester (AAPE) comprising: A) an acid component comprising repeating units of: 1) 49 to 66 mol % of an aromatic polyfunctional acid; 2) 51 to 34% of an aliphatic acid, at least 70% of which, is sebacic acid; B) butanediol; said AAPE being biodegradable according to the Standard ISO 14855 Amendment 1 of more than 40% in 30 days, with respect to cellulose used as reference, and having: a density of less than 1.22 g/cc; a number average molecular weight M n of 40,000 to 140,000; an inherent viscosity of 0.8 to 1.5; a polydispersity index M w /M n of between 1.8 and 2.5.