US4574148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resins capable of forming containers having improved gas barrier properties
Assignee: Eastman Chemical Co
•
Filing: 1985-06-21
•
Granted: 1986-03-04
•
Expires: 2005-06-21
Abstract
Abstract The present invention provides polyester resins useful for forming 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 about 5 to 95 mole percent of a first diacid selected from [thiobis(p-phenyleneoxy)]diacetic acid, [sulfonylbis(p-phenyleneoxy)]diacetic acid, and mixtures thereof, and about 5 to about 95 mole percent of naphthalene dicarboxylic acid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. 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
- 👤 Thomas H. Wicker, Jr.
- 👤 Robert B. Barbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:09
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
86 words
A polyester composition capable of being formed into molded containers having good gas barrier properties comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) about 5 to 95 mole percent of at least one first diacid selected from the group consisting of [thiobis(p-phenyleneoxy)]diacetic acid, [sulfonylbis(p-phenyleneoxy)]diacetic acid, and mixtures thereof, and (ii) 5 to about 95 mole percent of naphthalene dicarboxylic acid, wherein said polyester has an inherent viscosity of about 0.5 to 1.5.
Claim 2
Dependent Claim
86 words
A polyester composition capable of being formed into molded containers having good gas barrier properties comprising the reaction product of (A) a diol containing up to about 8 carbon atoms, and (B) a diacid component comprising (i) about 5 to 95 mole percent of at least one first diacid selected from the group consisting of [thiobis(p-phenyleneoxy)]diacetic acid, [sulfonylbis(p-phenyleneoxy)]diacetic acid, and mixtures thereof, and (ii) 5 to about 95 mole percent of naphthalene dicarboxylic acid, wherein said polyester has an inherent viscosity of about 0.5 to 1.5.
Claim 3
Dependent Claim
17 words
The polyester 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 polyester of claim 2 wherein said diol is ethylene glycol.
Claim 5
Dependent Claim
12 words
The polyester of claim 3 wherein said first diacid is [thiobis(p-phenyleneoxy)]diacetic acid.
Claim 6
Dependent Claim
12 words
The polyester of claim 3 wherein said first diacid is [sulfonylbis(p-phenyleneoxy)]diacetic acid.
Claim 7
Dependent Claim
21 words
The polyester of claim 1 wherein said first diacid is present in a concentration of about 5 to 60 mole percent.
Claim 8
Dependent Claim
12 words
The polyester of claim 6 wherein said first diacid is [thiobis(p-phenyleneoxy)]diacetic acid.
Claim 9
Dependent Claim
12 words
The polyester of claim 6 wherein said first diacid is [sulfonylbis(p-phenyleneoxy)]diacetic acid.
Claim 10
Dependent Claim
9 words
A container formed from the polyester of claim 1.
Claim 11
Dependent Claim
10 words
A molded container formed from the polyester of claim 1.
Claim 12
Dependent Claim
11 words
A blow molded container formed from the polyester of claim 1.
Claim 13
Dependent Claim
9 words
A film formed from the polyester of claim 1.
Claim 14
Dependent Claim
9 words
A coextruded article comprising the polyester of claim 1.
Claim 15
Dependent Claim
9 words
A laminated article comprising the polyester of claim 1.
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) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |