Polyester composition

Patent metadata

Field	Value
Publication number	US-10968345-B2
Application number	US-201113996821-A
Country	US
Kind code	B2
Filing date	Dec 22, 2011
Priority date	Dec 22, 2010
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

A polymer composition comprising at least two polyesters having improved mechanical properties including a good balance between ultimate tensile strength, elastic modulus and elongation on failure. In particular, the composition comprises from 1 to 99% by weight of at least one aromatic polyester (AP) comprising units from a diol component and units from an acid component, the units from the acid component comprising from 70 to 100 mol % of repeating units from at least one heterocyclic polyfunctional aromatic acid of renewable origin and from 99 to 1% by weight of at least a second aliphatic-aromatic polyester (AAPE). This composition is suitable for producing articles such as films, moulded objects, thermoformed objects or expanded articles. The heterocyclic aromatic acid is 2,5-furandicarboxylic acid and the aliphatic-aromatic polyester is biodegradable and is a copolyester comprising repeating units from aromatic acid of the phthalic acid type, aliphatic diacids, and aliphatic diols.

First claim

The invention claimed is:

1. A polymeric composition which comprises:
A. from 10-70% by weight of at least one aromatic polyester (AP) comprising
a1) units derived from a diol component selected from 1,4-butanediol and 1,2-ethanediol; and
a2) units derived from an acid component, said units derived from said acid component comprising from 70 to 100 mol % of repeating units deriving from at least one heterocyclic polyfunctional aromatic acid of renewable origin selected from the group consisting of 2,5-furandicarboxylic acid and 5-hydroxymethyl-2-furancarboxylic acid,
and said at least one aromatic polyester (AP) having a molecular weight M n from 40,000 to 150,000 and a polydispersity index KAI, from 1.5 to 5; and
B. from 90-30% by weight of at least a biodegradable aliphatic-aromatic polyester (AAPE) comprising:
b1) units deriving from at least one dicarboxylic aromatic compound selected from the group consisting of (C) and (D); wherein said (C) is at least one of an aromatic acid of the phthalic acid type and ester thereof; and said (D) is at least one of 2,5-furandicarboxylic acid and ester thereof; and aliphatic units deriving from the group consisting of adipic acid, succinic acid, suberic acid, azelaic acid, sebacic acid, dodecandioic acid, brassylic acid, and mixtures thereof; and wherein said (C) comprises from 40 to 75 mol % of units deriving from said phthalic acid type and ester thereof with respect to the total molar diacid content; and said (D) comprises from 30 to 70 mol % of units deriving from said 2,5-furandicarboxylic acid and ester thereof with respect to the total molar diacid content;
b2) units derived from 1,4-butanediol; said aliphatic-aromatic polyester (AAPE) having a molecular weight M n from 40,000 to 150,000 and a polydispersity index M w /M n from 1.5 to 5.

2. The polymeric composition according to claim 1 , in mixture with polyolefins, non-biodegradable polyesters, polyester- and polyether-urethanes, polyurethanes, polyamides, polyaminoacids, polyureas, polyethers, polycarbonates, polyethylene oxide and mixtures thereof.

3. The polymeric composition according to claim 1 , in mixture with one or more biodegradable polymers of synthetic or natural origin.

4. A mixture comprising the polymeric composition according to claim 3 and one or more biodegradable polymers of synthetic or natural origin, wherein said biodegradable polymers of synthetic origin are aliphatic polyesters of the diacid-diol, of the hydroxyacid or of the polyester-ether type.

5. A mixture comprising the polymeric composition according to claim 3 and one or more biodegradable polymer of synthetic or natural origin, wherein said biodegradable polymers of natural origin are starch, cellulose, chitin, chitosan, alginates, proteins, natural rubbers, rosinic acid and its derivatives, lignins and derivatives thereof.

6. A mixture according to claim 5 , wherein said starch is used in destructurized, gelatinized or in filler form.

7. The polymeric composition according to claim 1 or a mixture of said polymeric composition with one or more biodegradable polymers of synthetic or natural origin, wherein said biodegradable polymers of synthetic origin are aliphatic polyesters of the diacid-diol, of the hydroxyacid or of the polyester-ether type, which is in the form of
a mono- or bi-oriented film, and a film multilayered with another polymeric material;
cling films;
a bag or bin liner for organic waste collection;
mono- and multi-layered thermoformed foodstuff packaging,
a coating obtained using extrusion coating;
a multilayer laminate with a layer of paper, plastic, aluminium, or metallized films;
expanded or expandable beads for the production of pieces obtained by sintering;
expanded and semi-expanded products;
foam sheets, and containers obtained from foam sheets for use in foodstuff packaging;
fruit and vegetable containers;
composites with at least one of gelatinised, destructured, complexed starch, natural starch, flours, vegetable fillers and inorganic natural fillers;
fibres, microfibers, composite microfibers wherein the core is constituted by rigid polymers and the shell is constituted by said biodegradable polyester, blend composite fibres, fibres with different sections, from circular to multilobed, stample fibres, woven and nonwoven fabrics or spun bonded or thermobonded for use in sanitary and hygiene products, and in the agricultural and clothing sectors; and molded articles.

Assignees

• Bastioli Catia
• Capuzzi Luigi
• Milizia Tiziana
• Vallero Roberto
• Novamont Spa

Inventors

• Bastioli Catia
• Capuzzi Luigi
• Milizia Tiziana
• Vallero Roberto

Classifications

• C08G63/12

  derived from polycarboxylic acids and polyhydroxy compounds · CPC title

• C08L101/16

  the macromolecular compounds being biodegradable · CPC title

• C08L67/04

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title

• C08J2367/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) · CPC title

• C08J2367/04

  Polyesters derived from hydroxy carboxylic acids, e.g. lactones (C08J2367/06 takes precedence) · CPC title