US4328333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyesterethers
Assignee: Eastman Kodak Co
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Filing: 1981-04-24
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Granted: 1982-05-04
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Expires: 2001-04-24
Abstract
Abstract Disclosed are copolyesterethers that can be formed into bottles, tubing, film and the like having improved clarity. The copolyetheresters have an inherent viscosity of from 0.8 to about 2.0 and comprise A. a dicarboxylic acid component consisting essentially of terephthalic acid and an aliphatic or cycloaliphatic acid, and B. a diol component comprising (1) at least 70 mole percent 1,4-butanediol, and (2) from about 10 to about 60 weight percent, based on the weight of the polyetherester, of polypropyleneether glycol having a molecular weight of 1700 to 2400.
Inventors
- 👤 Robert B. Barbee
- 👤 Burns Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:53
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A copolyesterether comprising A. a dicarboxylic acid component consisting essentially of about 50-92.5 mole % terephthalic acid and about 50-7.5 mole % of another aliphatic or cycloaliphatic dicarboxylic acid having from 2 to 40 carbon atoms, and B. (1) a diol component comprising at least 70 mole % 1,4-butanediol and C. (2) from about 10 to about 60% based on the weight of the copolyesterether, of a polypropylene ether glycol having a molecular weight of about 1700-2400.
Claim 2
Dependent Claim
77 words
A copolyesterether comprising A. a dicarboxylic acid component consisting essentially of about 50-92.5 mole % terephthalic acid and about 50-7.5 mole % of another aliphatic or cycloaliphatic dicarboxylic acid having from 2 to 40 carbon atoms, and B. (1) a diol component comprising at least 70 mole % 1,4-butanediol and C. (2) from about 10 to about 60% based on the weight of the copolyesterether, of a polypropylene ether glycol having a molecular weight of about 1700-2400.
Claim 3
Dependent Claim
15 words
A copolyesterether according to claim 1 having an I.V. of about 0.8 to about 2.0.
Claim 4
Dependent Claim
17 words
A copolyesterether according to claim 1 wherein the molecular weight is between about 1800 and about 2200.
Claim 5
Dependent Claim
26 words
A copolyesterether according to claim 1 wherein the aliphatic or cycloaliphatic dicarboxylic acid is selected from the group consisting of adipic, dodecanedioic, 1,4-cyclohexanedicarboxylic and dimer acid.
Claim 6
Dependent Claim
32 words
A copolyesterether according to claim 1 wherein the polypropylene ether glycol is present in an amount of from about 20 to about 50 weight percent, based on the weight of the copolyesterether.
Claim 7
Dependent Claim
31 words
A copolyesterether according to claim 1 wherein the diol component comprises from about 0.5 to about 30 mole % of a low molecular weight glycol having 2 to 6 carbon atoms.
Claim 8
Dependent Claim
75 words
A copolyesterether comprising A. a dicarboxylic acid component consisting essentially of about 50-92.5 mole % terephthalic acid and about 50-7.5 mole % of another aliphatic or cycloaliphatic dicarboxylic acid having from 2 to 40 carbon atoms, and B. (1) a diol component comprising at least 70 mole % 1,4-butanediol and (2) from about 10 to about 60% based on the weight of the copolyesterether, of a polyoxypropylene glycol having a molecular weight of about 1800-2200.
Claim 9
Dependent Claim
75 words
A copolyesterether comprising A. a dicarboxylic acid component consisting essentially of about 50-92.5 mole % terephthalic acid and about 50-7.5 mole % of another aliphatic or cycloaliphatic dicarboxylic acid having from 2 to 40 carbon atoms, and B. (1) a diol component comprising at least 70 mole % 1,4-butanediol and (2) from about 10 to about 60% based on the weight of the copolyesterether, of a polyoxypropylene glycol having a molecular weight of about 1800-2200.
Claim 10
Dependent Claim
11 words
A film or molded article comprising the copolyesterether of claim 1.
Claim 11
Dependent Claim
11 words
A film or molded article comprising the copolyesterether of claim 7.
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) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |