# US 10,501,607 B2 · Polyphase biodegradable compositions containing at least one polymer of vegetable origin > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,607 B2 - Document ID: US10501607B2 - Status: Granted - Kind: B2 - Application number: 15/866,917 - Filed: 2018-01-10 - Published: 2018-05-10 - Granted: 2019-12-10 - Earliest claimed: 2010-08-06 - Assignees: Novamont S.p.A. - Applicants: Novamont S.p.A. - Inventors: Luigi Capuzzi - Web page: https://patentgrep.com/patent/US10501607B2 ## CPC - C08L 3/02: Starch; Degradation products thereof, e.g. dextrin - B65D 65/466: {Bio- or photodegradable packaging materials} - C08J 5/18: Manufacture of films or sheets - C08K 5/06: Ethers; Acetals; Ketals; Ortho-esters - C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers - C08L 67/03: the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings - C08J 2367/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) - C08J 2403/02: Starch; Degradation products thereof, e.g. dextrin - C08K 2201/014: Additives containing two or more different additives of the same subgroup in C08K - C08L 67/04: Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) - C08L 2201/06: Biodegradable - Y02W 90/10: Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics - Y10T 428/1334: Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.] - Y10T 428/1338: Elemental metal containing - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Polyphase biodegradable compositions having a good resistance to ageing comprising a continuous phase comprising at least one hydrophobic polyester and at least one dispersed phase of polymer of vegetable origin. The hydrophobic polyester constituting the continuous phase is incompatible with the polymer of vegetable origin. The compositions comprise a plasticiser comprising at least 75% of a mixture of diglycerol, triglycerol and tetraglycerol. ## Claims ### Claim 1 A film produced from a polyphase biodegradable composition having good resistance to ageing comprising: a) 45-98% by weight, with respect to the sum of components (a) and (b), of a continuous phase comprising at least one hydrophobic polyester, b) 2-55% by weight, with respect to the sum of components (a) and (b), of at least one dispersed phase comprising at least one polymer of vegetable origin, said composition further comprising a further dispersed phase comprising 1-40% by weight, with respect to the total weight of the composition, of at least a polylactic acid which is rigid in comparison with the hydrophobic polyester forming the continuous phase, with a Young's modulus of more than at least 300%, wherein: the hydrophobic polyester is an aliphatic-aromatic polyester of the diacids-diol type having an aromatic part comprising polyfunctional aromatic acids selected from dicarboxylic aromatic compounds of the phthalic acid type and their esters and heterocyclic dicarboxylic aromatic acids, and an aliphatic part consisting of aliphatic dicarboxylic acids and aliphatic diols, said polyester having an aromatic acids content of from 30% to 90% by moles, with respect to the acid component, and the polymer of vegetable origin is starch, the composition exhibits an Elmendorf tear strength of more than 60 N/mm in the transverse direction upon filming, said composition comprising 5-50% by weight, with respect to the weight of the polymer of vegetable origin, of a plasticizer comprising at least 75% by weight, with respect to the total weight of said plasticizer, of a mixture of diglycerol, triglycerol and tetraglycerol. ### Claim 2 (depends on 1) The film according to claim 1, wherein said hydrophobic polyester is biodegradable according to standard EN 13432. ### Claim 3 (depends on 1) The film according to claim 1, wherein said starch is flour, natural starch, chemically and/or physically modified starch, hydrolysed starch, destructured starch, gelatinised starch, plasticised starch, thermoplastic starch or mixtures thereof. ### Claim 4 (depends on 1) The film according to claim 1, wherein said polylactic acid contains at least 75% of L-lactic or D-lactic acid or combinations thereof having a molecular weight Mw of more than 70,000 and a Young's modulus of more than 1,500 MPa. ### Claim 5 (depends on 1) The film according to claim 1, wherein said plasticizer comprises at least 90% of a mixture of diglycerol, triglycerol and tetraglycerol. ### Claim 6 (depends on 5) The film according to claim 5, wherein said mixture comprises more than 50% by weight of diglycerol with respect to the sum of the di-, tri- and tetraglycerol. ### Claim 7 (depends on 5) The film according to claim 5, wherein said diglycerol comprises at least 70% by weight of alpha-alpha diglycerol. ### Claim 8 (depends on 1) A bag or envelope produced using the film according to claim 1, selected from the group consisting of extruded and thermoformed bags and envelopes, laminated with board, aluminium, plastics or bioplastics, and multiply perforated bags and envelopes.