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US 6,368,710 B1Granted
Sulfonated aliphatic-aromatic copolyesters
AssigneeE. I. Du Pont de Nemours and Company
InventorRichard Allen Hayes
Life of this patent
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Abstract
A sulfonated 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; (c) one or more sulfonated compound; and (d) isosorbide. The polyesters are useful to form articles of increased biodegradability.
Claims20
A sulfonated 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;
- (c) one or more sulfonated compound;
- and
- (d) isosorbide.
2 more elements
A method of improving the biodegradability and thermal properties of polyester, comprising forming the polyester from
- (a) one or more aromatic dicarboxylic acids or an ester thereof;
- (b) one or more aliphatic dicarboxylic acids or an ester thereof;
- (c) one or more sulfonated compound;
- and
- (d) isosorbide.
2 more elements
Dependencies are inferred from the claim text.