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US 7,067,596 B2Granted
Ternary mixtures of biodegradable polyesters and products manufactured from them
AssigneeNovamont S.p.A.
InventorsCatia Bastioli, Gianfranco Del Tredici, Italo Guanella, Tiziana Milizia, Roberto Ponti
Life of this patent
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Abstract
The invention relates to a mixture of biodegradable polyesters which includes an aromatic-aliphatic polyester (A), an aliphatic polyester (B) and a polylactic acid polymer (C) in which the concentration of A varies, with respect to (A+B) in the range between 40 and 70% by weight, and the concentration of C with respect of (A+B+C) is of between 6 and 30% by weight.
Claims34
A mixture of biodegradable polyesters which includes:
- (A) an aromatic-aliphatic polyester wit a melting point of between 50° and 170° C.;
- (B) an aliphatic polyester with a molecular weight Mw greater than 40,000 and a melting point of between 40° and 170° C. ;
- (C) a polylactic acid polymer which contains at least 75% of L-lactic or D-lactic acid, or combinations thereof, with a molecular weight Mw greater than 30,000, in which the concentration of A varies with respect to (A+B) in the range of between 40 and 70% by weight and the concentration of C with respect to (A+B+C) is of between 5 and 30%.
Dependencies are inferred from the claim text.