US4436895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester containers having improved gas barrier properties
Assignee: Eastman Chemical Co
•
Filing: 1983-04-13
•
Granted: 1984-03-13
•
Expires: 2003-04-13
Abstract
Abstract The present invention provides containers having improved resistance to gas permeability. The containers are formed from a polyester resin which comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises terephthalic acid and a second diacid selected from iminodiacetic acid, oxydiacetic acid, thiodiacetic acid, and mixtures thereof. The second diacid is present in a concentration of about 1 to 50 mole percent, based upon the total amount of diacid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. A preferred polyester is that derived from ethylene glycol, terephthalic acid, and oxydiacetic acid. The containers which are provided by the present invention may be 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
2026-11-01 14:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886; C08G63/66; C08G63/668; C08G63/672; C08G63/685; C08G63/6854; C08G63/6856
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
84 words
A container formed from 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) a second diacid selected from iminodiacetic acid, oxydiacetic acid, thiodiacetic acid, and mixtures thereof, wherein said second diacid is present in a concentration of about 1 to 50 mole percent, based upon the total amount of diacid, and wherein said polyester resin has an inherent viscosity of about 0.5 to 1.5.
Claim 2
Dependent Claim
84 words
A container formed from 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) a second diacid selected from iminodiacetic acid, oxydiacetic acid, thiodiacetic acid, and mixtures thereof, wherein said second diacid is present in a concentration of about 1 to 50 mole percent, based upon the total amount of diacid, and wherein said polyester resin has an inherent viscosity of about 0.5 to 1.5.
Claim 3
Dependent Claim
17 words
The container of claim 1 wherein said diol comprises ethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, or a mixture thereof.
Claim 4
Dependent Claim
11 words
The container of claim 1 wherein said diol comprises ethylene glycol.
Claim 5
Dependent Claim
10 words
The container of claim 1 wherein said diol comprises 1,4-butanediol.
Claim 6
Dependent Claim
10 words
The container of claim 1 wherein said diol comprises 1,4-cyclohexanedimethanol.
Claim 7
Dependent Claim
12 words
The container of claim 1 wherein said second diacid comprises oxydiacetic acid.
Claim 8
Dependent Claim
21 words
The container of claim 1 wherein said second diacid is present in a concentration of about 5 to 40 mole percent.
Claim 9
Dependent Claim
31 words
The container of claim 1 wherein said container is a film formed from said polyester resin wherein said polyester resin comprises about 10 to 40 mole percent of said second diacid.
Claim 10
Dependent Claim
32 words
The container of claim 1 wherein said container is a molded container formed from said polyester resin wherein said polyester resin comprises about 10 to 20 mole percent of said second diacid.
Claim 11
Dependent Claim
58 words
A container formed from a polyester resin comprising the reaction product of (A) a diol component comprising ethylene glycol, and (B) a diacid component comprising (i) terephthalic acid and (ii) 1 to 50 mole percent, based on the total amount of diacid, of oxydiacetic acid, wherein said polyester resin has an inherent viscosity of about 0.5 to 1.5.
Claim 12
Dependent Claim
58 words
A container formed from a polyester resin comprising the reaction product of (A) a diol component comprising ethylene glycol, and (B) a diacid component comprising (i) terephthalic acid and (ii) 1 to 50 mole percent, based on the total amount of diacid, of oxydiacetic acid, wherein said polyester resin has an inherent viscosity of about 0.5 to 1.5.
Claim 13
Dependent Claim
57 words
A container former from a polyester resin comprising the reaction product of (A) a diol component comprising 1,4-butanediol, and (B) a diacid component comprising (i) terephthalic acid and (ii) 1 to 50 mole percent, based on the total amount of diacid, of oxydiacetic acid, wherein said polyester resin has an inherent viscosity of about 0.5 to 1.5.
Claim 14
Dependent Claim
57 words
A container former from a polyester resin comprising the reaction product of (A) a diol component comprising 1,4-butanediol, and (B) a diacid component comprising (i) terephthalic acid and (ii) 1 to 50 mole percent, based on the total amount of diacid, of oxydiacetic acid, wherein said polyester resin has an inherent viscosity of about 0.5 to 1.5.
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) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |