Aliphatic-aromatic copolyesters
AssigneeE. I. Du Pont de Nemours and Company
InventorRichard Allen Hayes
Life of this patent
Estimating the term…
Abstract
A copolyester of the reaction product of: (a) one or more aromatic dicarboxylic acids or an ester thereof; (b) one or more aliphatic dicarboxylic acids or an ester thereof; and (c) isosorbide. The polyesters are useful to form articles of increased biodegradability.
Claims15
A copolyester consisting essentially of the polymerization product of:
- about 20 to about 98 mole percent of (a) one or more aromatic dicarboxylic acids or an ester thereof based on total dicarboxylic acid in the copolyester;
- about 2 to about 80 mole percent of (b) one or more aliphatic dicarboxylic acids or an ester thereof based on total dicarboxylic acid in the copolyester;
- and about 1 to about 100 mole percent of (c) isosorbide based on total glycols in the copolyester.
A copolyester consisting essentially of the polymerization product of:
- (a) one or more aromatic dicarboxylic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- (c) isosorbide;
- and
- (d) a polyfunctional chain branching agent.
A copolyester comprising the polymerization product of:
- (a) one or more aromatic dicarboxylic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- and
- (c) isosorbide,
- which has a rate of biodegradability at least twice that of a copolyester formed from the corresponding amount and type of said (a) and (c).
A copolyester consisting essentially of the polymerization product of:
- (a) one or more aromatic dicarboxylic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- and
- (c) isosorbide,
- wherein the aromatic dicarboxylic acid or ester (a) is selected from the group consisting of terephthatic acid, dimethyl terephthalate, isophthalic acid, dimethyl isophthalate, 2,6-naphthalene dicarboxylic acid, dimethyl-2,6-naphthalate, and mixtures of two or more thereof.
A copolyester consisting essentially of the polymerization product of:
- (a) one or more aomatic dicarboxylic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- and
- (c) isosorbide,
- which has a rate of biodegradability at least twice that of a copolyester formed from the corresponding amount and type of said (a) and (c).
A copolyester consisting essentially of the polymerization product of:
- (a) one or more aromatic dicarboxylic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- (c) isosorbide;
- and
- (d) a dihydric alcohol selected from the group consisting of ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, poly(ethylene ether) glycols, and two or more thereof.
A method of improving the biodegradability and thermal properties of a polyester, comprising forming the polyester from a composition consisting essentially of:
- about 20 to about 98 mole percent of (a) one or more aromatic dicarboxylic acids or an ester thereof based on total dicarboxylic acid in the copolyester;
- about 2 to about 80 mole percent of (b) one or more aliphatic dicarboxylic acids or an ester thereof based on total dicarboxylic acid in the copolyester;
- and
- about 1 to about 100 mole percent of (c) isosorbide based on total glycols in the copolyester.
A method of preparing a copolymer comprising melt polymerizing a composition consisting essentially of:
- about 20 to about 98 mole percent of (a) one or more aromatic dicarboxylic acids or an ester thereof based on total dicarboxylic acid in the copolyester;
- about 2 to about 80 mole percent of (b) one or more aliphatic dicarboxylic acids or an ester thereof based on total dicarboxylic acid in the copolyester;
- and
- about 1 to about 100 mole percent of (c) isosorbide based on total glycols in the copolyester.
A shaped article formed consisting essentially of from a copolyester comprising the polymerization product of:
- (a) one or more aromatic dicarboxvlic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- and
- (c) isosorbide.
A film or sheet formed at least in part from a copolyester consisting essentially of the polymerization product of:
- (a) one or more aromatic dicarboxylic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- and
- (c) isosorbide.
An injection molded compression molded, blow molded, or foamed article formed consisting essentially of from a copolyester comprising the polymerization product of:
- (a) one or more aromatic dicarboxylic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- and
- (c) isosorbide.
A fiber formed consisting essentially of from a copolyester comprising the polymerization product of:
- (a) one or more aromatic dicarboxylic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- and
- (c) isosorbide.
Dependencies are inferred from the claim text.