Aliphatic-aromatic polyesters, and articles made therefrom
AssigneeE. I. Du Pont de Nemours and Company
InventorRichard Allen Hayes
Life of this patent
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Abstract
Sulfonated aliphatic-aromatic polyester compositions having improved thermal properties, and articles such as films, coatings and laminates, produced from the sulfonated aliphatic-aromatic polyester compositions, are provided. Some of the films are biocompostable. Films made from the sulfonated aliphatic-aromatic copolyesters can be used to make shaped articles, such as sheets, thermoformed containers, and coatings for, for example, films and other substrates. The sulfonated aliphatic-aromatic copolyesters are produced from a mixture of aromatic dicarboxylic acids, aliphatic dicarboxylic acids, certain glycols, and components containing alkali metal or alkaline earth metal sulfonate groups, such as a metal 5-sulfoisophthalic acid derivative.
Claims87
A sulfonated aliphatic-aromatic copolyester comprising an acid component, a glycol component, and 0 to about 5.0 mole percent of a polyfunctional branching agent;
- wherein said acid component comprises:
- a. about 94.9 to 10.0 mole percent of an aromatic dicarboxylic acid component based on 100 mole percent total acid component,
- b. about 5.0 to 80.0 mole percent of an aliphatic dicarboxylic acid component, based on 100 mole percent total acid component, and
- c. about 0.1 to about 5.0 mole percent of a sulfonate component;
- and wherein said glycol component consists essentially of 1,3-propanediol.
A process for producing a package, comprising providing a substrate;
- forming said substrate into a desired package form;
- providing a sulfonated aliphatic-aromatic copolyester comprising an acid component, a glycol component, and 0 to about 5.0 mole percent of a polyfunctional branching agent;
- wherein said acid component comprises:
- a. about 94.9 to 10.0 mole percent of an aromatic dicarboxylic acid component based on 100 mole percent total acid component,
- b. about 5.0 to 80.0 mole percent of an aliphatic dicarboxylic acid component, based on 100 mole percent total acid component, and
- c. about 0.1 to about 5.0 mole percent of a sulfonate component, based on 100 mole percent total acid component;
- and wherein said glycol component consists essentially of 1,3-propanediol;
- and
- laminating or coating said substrate with said sulfonated aliphatic-aromatic copolyester to form said package.
A process for producing a sulfonated aliphatic-aromatic copolyester, comprising providing a reaction mixture comprising an aromatic dicarboxylic component, an aliphatic dicarboxylic acid component, a sulfonate component, a first glycol component consisting essentially of 1,3-propanediol, and optionally a polyfunctional branching agent;
- and allowing said aromatic dicarboxylic acid component, said aliphatic dicarboxylic acid component, said sulfonate component, said first glycol component and said polyfunctional branching agent to polymerize to form a sulfonated aliphatic-aromatic copolyester comprising an acid component, and a glycol component, wherein the acid component comprises
- a. about 94.9 to 10.0 mole percent of an aromatic dicarboxylic acid component based on 100 mole percent total acid component,
- b. about 5.0 to 80.0 mole percent of an aliphatic dicarboxylic acid component, based on 100 mole percent total acid component, and
- c. about 0.1 to about 5.0 mole percent of a sulfonate component, and wherein
- the glycol component consists essentially of 1,3-propanediol as said first glycol component, based on 100 mole percent total glycol component.
Dependencies are inferred from the claim text.