US3948859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyester hot-melt adhesives
Assignee: Eastman Kodak Co
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Filing: 1975-07-09
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Granted: 1976-04-06
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Expires: 1995-07-09
Abstract
Abstract Copolyesters useful as melt adhesives in the bonding of fabrics, and other products derived from (1) terephthalic acid, (2) adipic acid, (3) ethylene glycol, and (4) 1,6-hexanediol or derivatives of these components.
Inventors
- 👤 Bobby J. Sublett
- 👤 Willis C. Wooton, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
A hot melt adhesive composition comprising a copolyester derived from Components (1), (2), (3) and (4) as follows: 1. from about 75 to 95 mole percent terephthalic acid or ester forming derivatives thereof; 2. from about 5 to 25 mole percent adipic acid or ester forming derivatives thereof; 3. from about 55 to 85 mole percent 1,6-hexanediol; and 4. from about 15 to 45 mole percent ethylene glycol, said copolyester having a softening point within the range of about 70° to 120°C. and an inherent viscosity of at least about 0.50 as measured at 25°C. using 0.50 gram of copolyester per 100 ml. of a solvent consisting of 60 percent by weight phenol and 40 percent by weight tetrachloroethane.
Claim 2
Dependent Claim
119 words
A hot melt adhesive composition comprising a copolyester derived from Components (1), (2), (3) and (4) as follows: 1. from about 75 to 95 mole percent terephthalic acid or ester forming derivatives thereof; 2. from about 5 to 25 mole percent adipic acid or ester forming derivatives thereof; 3. from about 55 to 85 mole percent 1,6-hexanediol; and 4. from about 15 to 45 mole percent ethylene glycol, said copolyester having a softening point within the range of about 70° to 120°C. and an inherent viscosity of at least about 0.50 as measured at 25°C. using 0.50 gram of copolyester per 100 ml. of a solvent consisting of 60 percent by weight phenol and 40 percent by weight tetrachloroethane.
Claim 3
Dependent Claim
67 words
The composition of claim 1 wherein the mole percents of Components (1), (2), (3) and (4) are as follows: 1. 85 to 95 mole percent; 2. 5 to 15 mole percent; 3. 70 to 80 mole percent; and 4. 20 to 30 mole percent, said copolyester having a softening point within the range of about 90° to 110°C. and an inherent viscosity of at least about 0.8.
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |