CH187337A - Process for the preparation of an o-oxyazo dye. - Google Patents
Process for the preparation of an o-oxyazo dye.Info
- Publication number
- CH187337A CH187337A CH187337DA CH187337A CH 187337 A CH187337 A CH 187337A CH 187337D A CH187337D A CH 187337DA CH 187337 A CH187337 A CH 187337A
- Authority
- CH
- Switzerland
- Prior art keywords
- red
- dye
- preparation
- olive
- dyeings
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines o-Oxyazofarbstoffes. Es wurde gefunden, dass durch Kuppeln von diazotiertem 4-Nitro-2-amino-l-oxyben- zol mit 2-Acetylamino-6-oxynaphthalin-8- sulfonsäure ein Farbstoff erhalten wird, der durch Nachchromieren der in saurem Bade entstehenden Färbungen gleichmässige, olive Färbungen von ausgezeiehneten Echtheits eigenschaften liefert.
<I>Beispiel:</I> 15,5 kg 4-Nitro-2-amino-l-oxybenzol wer den diazotiert und mit 28,4 kg 2-Acetyl- amino-6-oxynaphthalin-8-sulfonsäure in soda- alkalischer Lösung gekuppelt. Nach beende ter Kupplung wird der Farbstoff ausgesalzen und erbfiltriert. Er ist ein .dunkles Pulver und löst sich in verdünnter Essigsäure rot, in verdünnter Natriumcarbonatlösung rot violett und in konzentrierter Schwefelsäure blaurot. Er färbt Wolle aus saurem Bade violett. Die nachchromierte Färbung ist olive.
Die Echtheitseigenschaften sind sehr gut.
Process for the preparation of an o-oxyazo dye. It has been found that by coupling diazotized 4-nitro-2-amino-1-oxyben- zene with 2-acetylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which, by after-chromating the colorations produced in acidic baths, produces uniform, olive dyeings with excellent fastness properties.
<I> Example: </I> 15.5 kg of 4-nitro-2-amino-1-oxybenzene are diazotized and mixed with 28.4 kg of 2-acetylamino-6-oxynaphthalene-8-sulfonic acid in alkaline soda Solution coupled. After the coupling has ended, the dye is salted out and filtered off. It is a dark powder and dissolves red in dilute acetic acid, red purple in dilute sodium carbonate solution and bluish red in concentrated sulfuric acid. He dyes wool from acid baths purple. The chromed color is olive.
The fastness properties are very good.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE187337X | 1934-11-10 | ||
CH184880T | 1935-08-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH187337A true CH187337A (en) | 1936-10-31 |
Family
ID=25721096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH187337D CH187337A (en) | 1934-11-10 | 1935-08-24 | Process for the preparation of an o-oxyazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH187337A (en) |
-
1935
- 1935-08-24 CH CH187337D patent/CH187337A/en unknown
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