US4067850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filaments and fibers having improved dyeability prepared from bis ethoxylated tetramethyl bisphenol A
Assignee: Bayer AG
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Filing: 1976-01-21
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Granted: 1978-01-10
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Expires: 1996-01-21
Abstract
Abstract Filaments and fibers having improved dyeability comprising a terephthalic acid copolyester containing bis ethoxylated tetramethylbisphenol A in cocondensed form.
Inventors
- 👤 Armin Kohler
- 👤 Herbert Pelousek
- 👤 Ekkehard Frohberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:19
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; D; D01; D01F; D01F6/00; D01F6/78; D01F6/84
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
42 words
Carrier-free dyeable filaments or fibers comprising a condensation product of terephthalic acid and a mixture of at least two glycols, one of which corresponds to the formula ##STR4##and is present in the amount of 4-15% by weight of the said condensation product.
Claim 2
Dependent Claim
42 words
Carrier-free dyeable filaments or fibers comprising a condensation product of terephthalic acid and a mixture of at least two glycols, one of which corresponds to the formula ##STR4##and is present in the amount of 4-15% by weight of the said condensation product.
Claim 3
Dependent Claim
37 words
Filaments or fibers of claim 1 wherein in addition to the glycol of the indicated formula said mixture includes a glycol selected from the group consisting of ethylene glycol, 1,4-butane diol, 1,4-bis-(hydroxymethyl)-cyclohexane and mixtures of said glycols.
Claim 4
Dependent Claim
39 words
Filaments or fibers of claim 2, comprising a terephthalic acid -ethylene glycol-bis(β-hydroxyethyl)-tetramethyl bisphenol A- copolyester, said copolyester having a relative viscosity, as measured on a 1% solution in o-chlorophenol at 25° C in an Ubbelohde-viscosimeter, of 1.35 to 2.02.
Claim 5
Dependent Claim
39 words
Filaments or fibers of claim 2, comprising a terephthalic acid-1,4 butane diol-bis(β-hydroxyethyl)-tetramethyl bisphenol A- copolyester, said copolyester having a relative viscosity, as measured on a 1% solution in o-chlorphenol at 25° C in an Ubbelohde-viscosimeter, of 1.53 to 1.97.
Claim 6
Dependent Claim
40 words
Filaments or fibers of claim 2, comprising a terephthalic acid - 1,4-cyclohexane dimethanol-bis(β-hydroxyethyl) tetramethyl bisphenol A-copolyester, said copolyester having a relative viscosity, as measured on a 1% solution in o-chlorophenol at 25° C in an Ubbelohde-viscosimeter, of 1.33 to 2.15.
Claim 7
Dependent Claim
12 words
A textile article comprising filaments and fibers as claimed in claim 1.
Claim 8
Dependent Claim
24 words
Filaments or fibers of claim 1, wherein said condensation product contains from 5 to 12% by weight of the glycol of the indicated formula.
References Cited (Backward Citations)
US3703372A
Cited
US3794617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |