Aliphatic-aromatic copolyesters
First Claim
Patent Images
1. 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.
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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.
31 Citations
15 Claims
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1. A copolyester consisting essentially of the polymerization product of:
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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. - View Dependent Claims (3)
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2. A copolyester consisting essentially of the polymerization product of:
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(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. - View Dependent Claims (8, 9)
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4. A copolyester comprising the polymerization product of:
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(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).
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5. A copolyester consisting essentially of the polymerization product of:
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(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.
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6. A copolyester consisting essentially of the polymerization product of:
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(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).
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7. A copolyester consisting essentially of the polymerization product of:
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(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.
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10. A method of improving the biodegradability and thermal properties of a polyester, comprising forming the polyester from a composition consisting essentially of:
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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.
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11. A method of preparing a copolymer comprising melt polymerizing a composition consisting essentially of:
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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.
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12. A shaped article formed consisting essentially of from a copolyester comprising the polymerization product of:
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(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.
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13. A film or sheet formed at least in part from a copolyester consisting essentially of the polymerization product of:
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(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.
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14. An injection molded compression molded, blow molded, or foamed article formed consisting essentially of from a copolyester comprising the polymerization product of:
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(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.
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15. A fiber formed consisting essentially of from a copolyester comprising the polymerization product of:
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(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.
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Specification