US4374640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing-stable modification of a disperse dyestuff, processes for its preparation and use
Assignee: Sanofi Aventis Deutschland GmbH
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Filing: 1982-03-29
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Granted: 1983-02-22
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Expires: 2002-03-29
Abstract
Abstract A dyestuff useful for dyeing and printing synthetic, hydrophobic fibers or mixtures thereof with cellulose fibers and stable under dyeing conditions is a β-modification of a compound of the formula ##STR1## having an X-ray diffraction pattern under Cu-Kα-radiation with high intensity lines at a diffraction angle in θ degrees of 3.75, 6.40 and 12.35; medium intensity lines at a diffraction angle in θ degrees of 6.60, 7.30, 7.60, 7.90, 8.10, 8.35, 9.30, 9.70, 9.90, 10.20, 10.50, 12.70 and 13.90; and low intensity lines at a diffraction angle in θ degrees of 5.65, 8.75, 11.25, 11.70, 13.35, 15.10 and 15.55; which is prepared by heating at 50°-150° C. the α-modification of said compound, which is unstable under dyeing conditions.
Inventors
- 👤 Horst Tappe
- 👤 Hans Mayer
- 👤 Klaus Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:42
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617; C09B41/00; C09B41/001; C09B41/002; C09B29/3621; C09B29/3626; C09B29/363; C09B67/00; C09B67/0001; C09B67/0014; C09B67/0015; C09B67/0025; C09B67/0028; C09B67/0029
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
A dyestuff stable under dyeing conditions and being the β-modification of a compound of the formula I ##STR3## having an X-ray diffraction pattern under Cu-Kα-radiation with high intensity lines at a diffraction angle in θ degrees of 3.75, 6.40 and 12.35; medium intensity lines at a diffraction angle in θ degrees of 6.60, 7.30, 7.60, 7.90, 8.10, 8.35, 9.30, 9.70, 9.90, 10.20, 10.50, 12.70 and 13.90; and low intensity lines at a diffraction angle in θ degrees of 5.65, 8.75, 11.25, 11.70, 13.35, 15.10 and 15.55.
Claim 2
Dependent Claim
86 words
A dyestuff stable under dyeing conditions and being the β-modification of a compound of the formula I ##STR3## having an X-ray diffraction pattern under Cu-Kα-radiation with high intensity lines at a diffraction angle in θ degrees of 3.75, 6.40 and 12.35; medium intensity lines at a diffraction angle in θ degrees of 6.60, 7.30, 7.60, 7.90, 8.10, 8.35, 9.30, 9.70, 9.90, 10.20, 10.50, 12.70 and 13.90; and low intensity lines at a diffraction angle in θ degrees of 5.65, 8.75, 11.25, 11.70, 13.35, 15.10 and 15.55.
Claim 3
Dependent Claim
60 words
The process for preparation of a dyestuff stable under dyeing conditions and being the β-modification dyestuff according to claim 1 comprising heating at temperatures of 50° to 150° C. the α-modification of the compound of formula I which is unstable under dyeing conditions until coverted to the β-modification of the compound of formula I which is stable under dyeing conditions.
Claim 4
Dependent Claim
19 words
The process according to claim 2 wherein the α-modification compound is heated at temperatures of 80° to 140° C.
Claim 5
Dependent Claim
19 words
The process according to claim 3 wherein the α-modification compound is heated at temperatures of 100° to 140° C.
Claim 6
Dependent Claim
16 words
The process according to claim 2 wherein the α-modification compound is heated in an aqueous suspension.
Claim 7
Dependent Claim
33 words
The process according to either claim 2 or claim 5 wherein the α-modification compound is heated in the presence of a member selected from dispersing agents, emulsifiers, wetting agents, solvents, and mixtures thereof.
Claim 8
Dependent Claim
17 words
The process according to claim 2 wherein the α-modification compound is heated in the presence of ethanol.
Claim 9
Dependent Claim
19 words
The process according to claim 2 wherein the α-modification compound is converted into a finely divided state while heated.
Claim 10
Dependent Claim
40 words
The process for preparation of the stable β-modification dyestuff compound according to claim 1 comprising coupling diazotized 4-amino-4'-isopropylbenzophenone with 3-cyano-4-methyl-6-hydroxy-2-pyridone at temperatures of 30° to 80° C. in ethanol or aqueous ethanol containing 10 to 90% by weight of water.
Claim 11
Dependent Claim
36 words
In the process of dyeing and printing synthetic, hydrophobic fiber materials or mixtures of said fiber materials with cellulose fibers, with an azo-dyestuff, the improvement comprises said azo-dyestuff being the β-modification compound according to claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |