CH238790A - Process for the preparation of a new monoazo dye. - Google Patents
Process for the preparation of a new monoazo dye.Info
- Publication number
- CH238790A CH238790A CH238790DA CH238790A CH 238790 A CH238790 A CH 238790A CH 238790D A CH238790D A CH 238790DA CH 238790 A CH238790 A CH 238790A
- Authority
- CH
- Switzerland
- Prior art keywords
- new
- preparation
- dye
- reddish
- solution
- Prior art date
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- Coloring (AREA)
Description
Yeilahr en zur Herstellung eines neuen Monoazofarbstoffes. Gegenstand vorliegender Erfindung ist ein Verfahren zur Herstellung eines neuen Mono azofarbstoffes.
Erfindungsgemäss wird der neue Mono azofarbstoff dadurch erhalten, dass man 4-N- Äthyl-N-p-chlorpropionylaminoanilin diazo- tiert und die erhaltene Diazoverbindung mit 2-Acetylamino-5-naphthol-7-sulfonsäure kup pelt.
Der neue Farbstoff bildet ein scharlach rotes Pulver, welches in Wasser unter Bil dung einer rötlichorangenen Lösung und in konzentrierter Schwefelsäure unter Bildung einer bläulichroten Lösung löslich ist. Der neue Farbstoff färbt Wolle aus einem sauren Färbebad in rötlichorangenen Farbtönen. Die erzielten Färbungen zeichnen sich durch sehr gute Echtheitseigenschaften gegen starkes Waschen, Walken und gegen Lichteinwir kung aus.
Die Erfindung sei durch das nachstehende Beispiel erläutert, worin die Teile Gewichts- teile bedeuten. <I>Beispiel:</I> 22,65 Teile 4-N-Äthyl-N-R-chlorpropionyl- aminoanilin werden in 400 Teilen Wasser und 25 Teilen 36 o/oiger Salzsäure gelöst und die erhaltene Lösung hierauf mit 6,9 Teilen Na- triumnitrit versetzt.
Die auf diese Weise er haltene Lösung der Diazoverbindung wird nach dem Kühlen auf 10 o C allmählich unter Rühren bei 10-15 C in eine Lösung von 30,3 Teilen Natrium-2-acetylamino-5-naphthol- 7-sulfonat und 28 Teilen kristallisiertes Na triumacetat<B>in</B> 400 Teilen Wasser eingetragen. Man rührt weiter, bis die Kupplung beendet ist, worauf der neue Farbstoff filtriert, mit 5 o/oiger Kochsalzlösung gewaschen und ge trocknet wird.
Yeilahr en for the production of a new monoazo dye. The present invention is a process for the preparation of a new mono azo dye.
According to the invention, the new mono azo dye is obtained by diazoing 4-N-ethyl-N-p-chloropropionylaminoaniline and coupling the resulting diazo compound with 2-acetylamino-5-naphthol-7-sulfonic acid.
The new dye forms a scarlet red powder, which is soluble in water to form a reddish-orange solution and in concentrated sulfuric acid to form a bluish-red solution. The new dye dyes wool from an acid dye bath in reddish-orange shades. The dyeings obtained are characterized by very good fastness properties against heavy washing, fulling and against the effects of light.
The invention is illustrated by the following example, in which the parts mean parts by weight. <I> Example: </I> 22.65 parts of 4-N-ethyl-NR-chloropropionyl-aminoaniline are dissolved in 400 parts of water and 25 parts of 36% hydrochloric acid and the resulting solution is then mixed with 6.9 parts of sodium trium nitrite added.
The solution of the diazo compound obtained in this way is, after cooling to 10 o C, gradually crystallized with stirring at 10-15 C in a solution of 30.3 parts of sodium 2-acetylamino-5-naphthol-7-sulfonate and 28 parts Sodium acetate entered in 400 parts of water. Stirring is continued until the coupling has ended, whereupon the new dye is filtered, washed with 5% sodium chloride solution and dried.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB238790X | 1941-10-08 | ||
| CH236996T | 1942-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH238790A true CH238790A (en) | 1945-08-15 |
Family
ID=25728211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH238790D CH238790A (en) | 1941-10-08 | 1942-10-07 | Process for the preparation of a new monoazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH238790A (en) |
-
1942
- 1942-10-07 CH CH238790D patent/CH238790A/en unknown
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