US4518763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyesters from ether-containing glycols and acids
Assignee: Eastman Chemical Co
•
Filing: 1984-05-21
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Granted: 1985-05-21
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Expires: 2004-05-21
Abstract
Abstract Disclosed are polyesters prepared from hetero-atom-containing dicarboxylic acids and hetero-atom-containing diols. These polyesters have low permeability to oxygen and carbon dioxide and are useful in packaging applications such as for food and beverages.
Inventors
- 👤 Robert B. Barbee
- 👤 Burns Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:33
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G63/6856; C08G63/66; C08G63/668; C08G63/672; C08G63/688; C08G63/6884; C08G63/6886
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
A polyester prepared by reacting a dicarboxylic acid component comprising at least 90 mole % of an acid of the general formula HO.sub.2 CH.sub.2 CX(RX)yCH.sub.2 CO.sub.2 H where y=zero or one, and at least 75 mole % of a diol of the general formula HOCH.sub.2 CH.sub.2 XRXCH.sub.2 CH.sub.2 OH wherein R in each of said formulas is an aromatic moiety comprising 6 to 24 carbon atoms and X in each of the above formulas is ##STR5##
Claim 2
Dependent Claim
76 words
A polyester prepared by reacting a dicarboxylic acid component comprising at least 90 mole % of an acid of the general formula HO.sub.2 CH.sub.2 CX(RX)yCH.sub.2 CO.sub.2 H where y=zero or one, and at least 75 mole % of a diol of the general formula HOCH.sub.2 CH.sub.2 XRXCH.sub.2 CH.sub.2 OH wherein R in each of said formulas is an aromatic moiety comprising 6 to 24 carbon atoms and X in each of the above formulas is ##STR5##
Claim 3
Dependent Claim
16 words
A polyester according to claim 1 wherein X in the formula for said acid is --O--.
Claim 4
Dependent Claim
16 words
A polyester according to claim 1 wherein X in the formula for said diol is --O--.
Claim 5
Dependent Claim
20 words
A polyester according to claim 1 wherein X in both the formulas for said acid and said diol is --O--.
Claim 6
Dependent Claim
21 words
A polyester according to claim 1 wherein said acid is selected from the group consisting of 1,2-, 1,3-, and 1,4-phenylenedioxydiacetic acid.
Claim 7
Dependent Claim
20 words
A polyester according to claim 1 wherein said diol is selected from the group consisting of 1,2-, 1,3-, and 1,4-bis(β-hydroxyethoxy)benzene.
Claim 8
Dependent Claim
35 words
A polyester according to claim 1 wherein said acid is selected from the group consisting of 1,2-, 1,3-, and 1,4-phenylenedioxydiacetic acid and said diol is selected from the group consisting of 1,2-, 1,3-, and 1,4-bis(β-hydroxyethoxy)benzene.
Claim 9
Dependent Claim
17 words
A polyester according to claim 1 wherein R in at least one of said formulas is ##STR6##
Claim 10
Dependent Claim
15 words
A polyester according to claim 1 wherein R in both of said formulas is ##STR7##
Claim 11
Dependent Claim
9 words
Sheet material comprising the polyester defined in claim 1.
Claim 12
Dependent Claim
9 words
A container comprising the polyester defined in claim 1.
References Cited (Backward Citations)
US4440922A
Cited
US4426512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |