US4546170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resins useful for forming containers having improved gas barrier properties
Assignee: Eastman Chemical Co
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Filing: 1984-12-26
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Granted: 1985-10-08
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Expires: 2004-12-26
Abstract
Abstract The present invention provides polyester resins useful for forming containers having improved resistance to gas permeability. The polyester resin comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises terephthalic acid and oxydiacetic acid. The oxydiacetic acid is present in a concentration of about 5 to 50 mole percent, based upon the total amount of diacid. The polyester resin has an inherent viscosity of about 0.4 to 1.5. A preferred polyester is that derived from ethylene glycol, terephthalic acid, and about 10 to 40 mole percent oxydiacetic acid. The polyesters which are provided by the present invention may be formed into containers in the form of sheet, film, molded articles, such as bottles, and other such structures.
Inventors
- 👤 Robert B. Barbee
- 👤 Burns Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:17
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
68 words
A polyester resin comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) terephthalic acid and (ii) oxydiacetic acid, wherein said oxydiacetic acid is present in an amount of about 5 to 50 mole percent, based upon the total amount of diacid, and wherein said polyester resin has an inherent viscosity of about 0.4 to 1.5.
Claim 2
Dependent Claim
68 words
A polyester resin comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) terephthalic acid and (ii) oxydiacetic acid, wherein said oxydiacetic acid is present in an amount of about 5 to 50 mole percent, based upon the total amount of diacid, and wherein said polyester resin has an inherent viscosity of about 0.4 to 1.5.
Claim 3
Dependent Claim
18 words
A polyester resin of claim 1 wherein said diol comprises ethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, or a mixture thereof.
Claim 4
Dependent Claim
12 words
A polyester resin of claim 1 wherein said diol comprises ethylene glycol.
Claim 5
Dependent Claim
11 words
A polyester resin of claim 1 wherein said diol comprises 1,4-butanediol.
Claim 6
Dependent Claim
11 words
A polyester resin of claim 1 wherein said diol comprises 1,4-cyclohexanedimethanol.
Claim 7
Dependent Claim
68 words
A polyester resin comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) terephthalic acid and (ii) oxydiacetic acid, wherein said oxydiacetic acid is present in an amount of about 7.5 to 45 mole percent, based upon the total amount of diacid, and wherein said polyester resin has an inherent viscosity of about 0.5 to 1.2.
Claim 8
Dependent Claim
68 words
A polyester resin comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) terephthalic acid and (ii) oxydiacetic acid, wherein said oxydiacetic acid is present in an amount of about 7.5 to 45 mole percent, based upon the total amount of diacid, and wherein said polyester resin has an inherent viscosity of about 0.5 to 1.2.
Claim 9
Dependent Claim
18 words
A polyester resin of claim 6 wherein said diol comprises ethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, or a mixture thereof.
Claim 10
Dependent Claim
12 words
A polyester resin of claim 6 wherein said diol comprises ethylene glycol.
Claim 11
Dependent Claim
11 words
A polyester resin of claim 6 wherein said diol comprises 1,4-butanediol.
Claim 12
Dependent Claim
11 words
A polyester resin of claim 6 wherein said diol comprises 1,4-cyclohexanedimethanol.
Claim 13
Dependent Claim
68 words
A polyester resin comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) terephthalic acid and (ii) oxydiacetic acid, wherein said oxydiacetic acid is present in an amount of about 10 to 40 mole percent, based upon the total amount of diacid, and. wherein said polyester resin has an inherent viscosity of about 0.4 to 1.2.
Claim 14
Dependent Claim
68 words
A polyester resin comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) terephthalic acid and (ii) oxydiacetic acid, wherein said oxydiacetic acid is present in an amount of about 10 to 40 mole percent, based upon the total amount of diacid, and. wherein said polyester resin has an inherent viscosity of about 0.4 to 1.2.
Claim 15
Dependent Claim
18 words
A polyester resin of claim 11 wherein said diol comprises ethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, or a mixture thereof.
Claim 16
Dependent Claim
12 words
A polyester resin of claim 11 wherein said diol comprises ethylene glycol.
Claim 17
Dependent Claim
11 words
A polyester resin of claim 11 wherein said diol comprises 1,4-butanediol.
Claim 18
Dependent Claim
11 words
A polyester resin of claim 11 wherein said diol comprises 1,4-cyclohexanedimethanol.
Claim 19
Dependent Claim
68 words
A polyester resin comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) terephthalic acid and (ii) oxydiacetic acid, wherein said oxydiacetic acid is present in an amount of about 10 to 40 mole percent, based upon the total amount of diacid, and wherein said polyester resin has an inherent viscosity of about 0.55 to 1.
Claim 20
Dependent Claim
68 words
A polyester resin comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) terephthalic acid and (ii) oxydiacetic acid, wherein said oxydiacetic acid is present in an amount of about 10 to 40 mole percent, based upon the total amount of diacid, and wherein said polyester resin has an inherent viscosity of about 0.55 to 1.
Claim 21
Dependent Claim
18 words
A polyester resin of claim 16 wherein said diol comprises ethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, or a mixture thereof.
Claim 22
Dependent Claim
12 words
A polyester resin of claim 16 wherein said diol comprises ethylene glycol.
Claim 23
Dependent Claim
11 words
A polyester resin of claim 16 wherein said diol comprises 1,4-butanediol.
Claim 24
Dependent Claim
11 words
A polyester resin of claim 16 wherein said diol comprises 1,4-cyclohexanedimethanol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |