US4079047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters containing a critical range of suberic acid
Assignee: Eastman Chemical Co
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Filing: 1976-11-05
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Granted: 1978-03-14
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Expires: 1996-11-05
Abstract
Abstract Disclosed are polyesters composed of terephthalic acid, suberic acid and 1,4-cyclohexanedimethanol, wherein the suberic acid is within a critical range of 60 to 90 mole percent. These polyesters exhibit desirable adhesive properties.
Inventors
- 👤 Winston Jerome Jackson, Jr.
- 👤 William Ronald Darnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:50
CPC Classifications
C; C09; C09J; C09J167/00; C09J167/02; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
A polyester having an inherent viscosity of at least 0.4 measured at 25° C. using 0.50 grams of polymer per 100 ml. of a solvent composed of 60 volumes of phenol and 40 volumes of tetrachloroethane consisting essentially of (A) a dicarboxylic acid component which is (1) from 60 to 90 mole percent suberic acid, and (2) from 40 to 10 mole percent terephthalic acid, and (B) 1,4-cyclohexanedimethanol.
Claim 2
Dependent Claim
68 words
A polyester having an inherent viscosity of at least 0.4 measured at 25° C. using 0.50 grams of polymer per 100 ml. of a solvent composed of 60 volumes of phenol and 40 volumes of tetrachloroethane consisting essentially of (A) a dicarboxylic acid component which is (1) from 60 to 90 mole percent suberic acid, and (2) from 40 to 10 mole percent terephthalic acid, and (B) 1,4-cyclohexanedimethanol.
Claim 3
Dependent Claim
26 words
The polyester of claim 1 wherein the dicarboxylic acid component is 65 to 80 mole percent suberic acid and 35 to 20 mole percent terephthalic acid.
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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |