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US 6,787,613 B2Granted
Ternary mixture of biodegradable polyesters and products obtained therefrom
AssigneeNovamont S.p.A.
InventorsCatia Bastioli, Gianfranco Del Tredici, Italo Guanella, 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 polyactic 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 to (A+B+C) is of between 6 and 30% by weight.
Claims27
A mixture of biodegradable polyesters which includes:
- A. an aromatic-aliphatic polyester with a melting point of between 50° and 170° C.;
- B. an aliphatic polyester with a molecular weight Mw greater than 60,000 and a melting point between 50° and 95° 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 6 and 30%.
Dependencies are inferred from the claim text.