US4075180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters containing a critical range of 1,4-cyclohexanedicarboxylic acid
Assignee: Eastman Chemical Co
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Filing: 1976-12-09
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Granted: 1978-02-21
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Expires: 1996-12-09
Abstract
Abstract Disclosed are polyesters composed of 1,4-cyclohexanedicarboxylic acid, terephthalic acid and 1,4-butanediol, wherein the 1,4-cyclohexanedicarboxylic acid is within a critical range of about 25 to about 58 mole percent. These polyesters exhibit desirable adhesive properties.
Inventors
- 👤 Burns Davis
- 👤 Frederick David Petke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:38
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199; C09; C09J; C09J167/00; C09J167/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A polyester having an inherent viscosity of at least 0.4 measured at 25° C. using 0.50 gram 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. about 25 to about 58 mole percent 1,4-cyclohexanedicarboxylic acid, and 2. about 75 to about 42 mole percent terephthalic acid, and B. 1,4-butanediol.
Claim 2
Dependent Claim
70 words
A polyester having an inherent viscosity of at least 0.4 measured at 25° C. using 0.50 gram 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. about 25 to about 58 mole percent 1,4-cyclohexanedicarboxylic acid, and 2. about 75 to about 42 mole percent terephthalic acid, and B. 1,4-butanediol.
Claim 3
Dependent Claim
26 words
The polyester of claim 1 wherein the dicarboxylic acid component is 37 to 55 mole percent 1,4-cyclohexanedicarboxylic acid and 63 to 45 mole percent terephthalic acid.
Claim 4
Dependent Claim
24 words
The polyester of claim 2 wherein the dicarboxylic acid component is about 50 mole percent 1,4-cyclohexanedicarboxylic acid and about 50 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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |