Patent US4256860A successfully refreshed from Google Patents.
US4256860A
Expired / Lapsed
US
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Copolyetheresters
Assignee: Eastman Chemical Co
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Filing: 1979-12-26
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Granted: 1981-03-17
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Expires: 1999-12-26
Abstract
Abstract Disclosed are high melt strength, blow-moldable polymers that can be formed into bottles, tubing, film and the like. The polymers are copolyetheresters having an inherent viscosity of from 1.0 to about 2.5 comprising A. a dicarboxylic acid component consisting essentially of 1,4-cyclohexanedicarboxylic acid, and B. a diol component comprising (1) at least 70 mole percent 1,4-cyclohexanedimethanol, and (2) from about 15 to about 60 weight percent, based on the weight of the polyetherester, of polypropyleneether glycol having a molecular weight of 1000 to 4000.
Inventors
- 👤 Burns Davis
- 👤 Robert B. Barbee
- 👤 Harry R. Musser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:55
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
64 words
A copolyetherester having an inherent viscosity of from 1.0 to about 2.5 comprising A. a dicarboxylic acid component consisting essentially of 1,4-cyclohexanedicarboxylic acid, and B. a diol component comprising (1) at least 70 mole percent 1,4-cyclohexanedimethanol, and (2) from about 15 to about 60 weight percent, based on the weight of the polyetherester, of polypropyleneether glycol having a molecular weight of 1000 to 4000.
Claim 2
Dependent Claim
64 words
A copolyetherester having an inherent viscosity of from 1.0 to about 2.5 comprising A. a dicarboxylic acid component consisting essentially of 1,4-cyclohexanedicarboxylic acid, and B. a diol component comprising (1) at least 70 mole percent 1,4-cyclohexanedimethanol, and (2) from about 15 to about 60 weight percent, based on the weight of the polyetherester, of polypropyleneether glycol having a molecular weight of 1000 to 4000.
Claim 3
Dependent Claim
39 words
A copolyetherester according to claim 1 in which the diol component comprises from 70 to about 99.5 mole percent 1,4-cyclohexanedimethanol and from about 0.5 to about 30 mole percent of a glycol containing from 2 to 5 carbon atoms.
Claim 4
Dependent Claim
31 words
A copolyetherester according to claim 1 having from about 0.05 to about 2 mole percent of branching agent comprising an acid, alcohol or mixture thereof having a functionality greater than 2.
Claim 5
Dependent Claim
16 words
A copolyetherester according to claim 1 having a die swell of no less than about -50%.
Claim 6
Dependent Claim
19 words
A copolyetherester according to claim 1 having a die swell within the range of about -20% to about 50%.
Claim 7
Dependent Claim
19 words
A copolyetherester according to claim 1 including up to 0.5 weight percent of sodium stearate as mold release agent.
Claim 8
Dependent Claim
99 words
A copolyetherester having an inherent viscosity of from 1.0 to about 2.5 comprising A. a dicarboxylic acid component consisting essentially of 1,4-cyclohexanedicarboxylic acid, and B. a diol component comprising (1) from about 70 to about 99.5, (2) from about 30 to about 0.5 mole percent of at least one other glycol having from 2 to 5 carbon atoms, and (3) from about 15 to about 60 weight percent, based on the weight of the polyetherester, of polypropyleneether glycol having a molecular weight of 1000 to 4000, said copolyetherester having a die swell of from about -20% to about 50%.
Claim 9
Dependent Claim
99 words
A copolyetherester having an inherent viscosity of from 1.0 to about 2.5 comprising A. a dicarboxylic acid component consisting essentially of 1,4-cyclohexanedicarboxylic acid, and B. a diol component comprising (1) from about 70 to about 99.5, (2) from about 30 to about 0.5 mole percent of at least one other glycol having from 2 to 5 carbon atoms, and (3) from about 15 to about 60 weight percent, based on the weight of the polyetherester, of polypropyleneether glycol having a molecular weight of 1000 to 4000, said copolyetherester having a die swell of from about -20% to about 50%.
Claim 10
Dependent Claim
27 words
A copolyetherester according to claim 7 having from about 0.05 to about 2 mole percent of a branching agent comprising a tribasic acid or a polyhydric alcohol.
Claim 11
Dependent Claim
10 words
A blow-molded article comprising the copolyetherester according to claim 1.
Claim 12
Dependent Claim
10 words
A blow-molded article comprising the copolyetherester according to 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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |