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US 12,661,875 B2Granted
Biodegradable film
AssigneeNovamont S.p.A.
InventorsRoberto Ponti, Claudio Russo
Life of this patent
Estimating the term…
Abstract
This invention relates to a biodegradable film which is particularly suitable for the manufacture of packaging and is also characterised by high level mechanical properties.
Claims18
A film made by a composition comprising:
- i) 30-95% by weight, with respect to the sum of components i.-v., of at least one polyester comprising:
- a) a dicarboxylic component containing with respect to the total dicarboxylic component:
- a1) 45-60% by moles of units deriving from at least one aromatic dicarboxylic acid;
- a2) 55-40% by moles of units deriving from saturated aliphatic dicarboxylic acid comprising at least 50% by moles of a mixture of adipic acid and azelaic acid, wherein the mixture contains azelaic acid in a quantity of between 5 and 40% by moles of azelaic acid with respect to the sum of adipic acid and azelaic acid;
- a3) 0-5% by moles of units deriving from at least one unsaturated aliphatic dicarboxylic acid;
- b) a diol component comprising with respect to the total diol component:
- b1) 95-100% by moles of units deriving from at least one saturated aliphatic diol;
- b2) 0-5% by moles of units deriving from at least one unsaturated aliphatic diol;
- ii) 0.1-50% by weight, with respect to the sum of components i.-v., of at least one polymer of natural origin,
- iii) 1-40% by weight, with respect to the sum of components i.-v., of at least one polyhydroxy alkanoate;
- iv) 0-15% by weight, with respect to the sum of components i.-v., of at least one inorganic filler;
- v) 0-5% by weight, with respect to the sum of components i.-v., of at least one crosslinking agent and/or chain extender comprising at least one compound having two and/or multiple functional groups including isocyanate, peroxide, carbodiimide, isocyanurate, oxazoline, epoxide, anhydride divinylether groups and mixtures thereof, wherein said film is characterized by a tear resistance in the machine direction of >100 N/mm, determined according to ASTM D1922 (at 23° C. and 55% relative humidity).
9 more elements
Dependencies are inferred from the claim text.