Patent US3966841A successfully refreshed from Google Patents.
US3966841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixtures of polyesters and DAC-B resin
Assignee: Eastman Kodak Co
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Filing: 1975-06-30
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Granted: 1976-06-29
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Expires: 1995-06-30
Abstract
Abstract Disclosed are compositions of DAC-B hydrocarbon resin and a poly(ethylene terephthalate) type polyester, a poly(tetramethylene terephthalate) type polyester, or a poly(1,4-cyclohexylenedimethylene terephthalate) type polyester. These compositions have a lower melt viscosity at elevated temperatures than the polyesters alone and can therefore be melt spun into fibers at a lower temperature than the polyester alone. Fibers spun from these compositions have properties substantially equivalent to the properties of fibers spun from the polyester alone.
Inventors
- 👤 Robert L. Combs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:00
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/88; D01F6/92; C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
A composition comprised of a mixture of A. a polyester of 1. a dicarboxylic acid component which is at least 80 mole percent terephthalic acid, 2. a diol component which is at least 80 mole percent ethylene glycol, and B. from 1-14 weight percent, based on the weight of the polyester, DAC-B hydrocarbon resin.
Claim 2
Dependent Claim
54 words
A composition comprised of a mixture of A. a polyester of 1. a dicarboxylic acid component which is at least 80 mole percent terephthalic acid, 2. a diol component which is at least 80 mole percent ethylene glycol, and B. from 1-14 weight percent, based on the weight of the polyester, DAC-B hydrocarbon resin.
Claim 3
Dependent Claim
26 words
The composition of claim 1 wherein the polyester is comprised of terephthalic acid and ethylene glycol and the DAC-B hydrocarbon resin is from 3-4 weight percent.
Claim 4
Dependent Claim
53 words
A composition comprised of a mixture of A. a polyester of 1. a dicarboxylic acid component which is at least 80 mole percent terephthalic acid, 2. a diol component which is at least 80 mole percent 1,4-butanediol, and B. from 1-22 weight percent, based on the weight of the polyester, DAC-B hydrocarbon resin.
Claim 5
Dependent Claim
53 words
A composition comprised of a mixture of A. a polyester of 1. a dicarboxylic acid component which is at least 80 mole percent terephthalic acid, 2. a diol component which is at least 80 mole percent 1,4-butanediol, and B. from 1-22 weight percent, based on the weight of the polyester, DAC-B hydrocarbon resin.
Claim 6
Dependent Claim
25 words
The composition of Claim 1 wherein the polyester is comprised of terephthalic acid and 1,4-butanediol, and the DAC-B hydrocarbon resin is from 6-8 weight percent.
Claim 7
Dependent Claim
53 words
A composition comprised of a mixture of A. a polyester of 1. a dicarboxylic acid component which is at least 80 mole percent terephthalic acid, 2. A diol component which is at least 80 mole percent 1,4-cyclohexanedimethanol, and B. from 1-32 weight percent, based on the weight of the polyester, DAC-B hydrocarbon resin.
Claim 8
Dependent Claim
53 words
A composition comprised of a mixture of A. a polyester of 1. a dicarboxylic acid component which is at least 80 mole percent terephthalic acid, 2. A diol component which is at least 80 mole percent 1,4-cyclohexanedimethanol, and B. from 1-32 weight percent, based on the weight of the polyester, DAC-B hydrocarbon resin.
Claim 9
Dependent Claim
25 words
The composition of claim 1 wherein the polyester is comprised of terephthalic acid and 1,4-cyclohexanedimethanol, and the DAC-B hydrocarbon resin is from 8-18 weight percent.
References Cited (Backward Citations)
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Cited
US3437629A
Cited
US3700758A
Cited
US3701760A
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US3652725A
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US3794698A
Cited
US3850858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |