CH160670A - Process for the preparation of a water-insoluble azo dye. - Google Patents
Process for the preparation of a water-insoluble azo dye.Info
- Publication number
- CH160670A CH160670A CH160670DA CH160670A CH 160670 A CH160670 A CH 160670A CH 160670D A CH160670D A CH 160670DA CH 160670 A CH160670 A CH 160670A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- preparation
- insoluble azo
- azo dye
- dye
- Prior art date
Links
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- Coloring (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines wasserunlöslichen Azofarbstoffes. Gegenstand dieses Zusatzpatentes ist ein Verfahren zur Darstellung eines wasser unlöslichen Azofarbstoffes, das dadurch ge kennzeichnet ist, dass man die Diazoverbin- dung von 2.5-Dichloranilin mit Terephta- loyl-bis-essigsäure-l-a.mino-3 - chlor-4 . 6 - di- methoxybenzol kuppelt. Die Einwirkung der beiden Komponenten aufeinander kann auch in Gegenwart eines Substrates erfolgen.
Der in Substanz hergestellte Farbstoff bildet ein rotstichig gelbes Pulver; die Fär bungen besitzen einen lebhaften, rotstichig gelben Farbton und sind sehr gut lichtecht. Beispiel: 58,9 gr Terephta.loyl - bis - essigsäure- 1 - amino - 3 - chlor - 4 . 6 - dimethogybenzol werden in 100 cm' doppelt normaler Natron lauge und Wasser heiss gelöst.
Diese Lö sung läuft zu einer wie folgt bereiteten Diazolösung: 32,4 gr 2 . 5 - Dichloranilin werden mit 52 ein' Salzsäure von 22 B6 und 14,4 gr Natriumnitrit unter Eiszusatz wie üblich diazotiert und mit Natriumacetat auf Kongoneutralität abgestumpft. Die Farbstoffbildung ist nach mehrstün- digem Nachrühren beendet. Man saugt ab, wäscht gut mit Wasser und trocknet.
Man erhält ein rotstichig gelbes Pulver. Die Darstellung des Farbstoffes kann auch in Gegenwart eines Substrates erfolgen. Wird der Farbstoff auf der Faser erzeugt, so erhält man einen sehr lichtechten, lebhaf- ten rotstichig gelben Farbton.
Process for the preparation of a water-insoluble azo dye. The subject of this additional patent is a process for the preparation of a water-insoluble azo dye, which is characterized in that the diazo compound of 2,5-dichloroaniline with terephthalyl-bis-acetic acid-1-a.mino-3-chloro-4. 6 - dimethoxybenzene couples. The two components can also act on one another in the presence of a substrate.
The dye produced in substance forms a reddish-tinged yellow powder; the colors have a lively, reddish yellow hue and are very lightfast. Example: 58.9 g terephta.loyl - bis - acetic acid - 1 - amino - 3 - chlorine - 4. 6 - dimethogybenzene are dissolved in 100 cm 'double normal sodium hydroxide solution and hot water.
This solution runs into a diazo solution prepared as follows: 32.4 gr 2. 5 - dichloroaniline are diazotized with 52 a 'hydrochloric acid of 22 B6 and 14.4 g sodium nitrite with the addition of ice as usual and blunted to Congo neutrality with sodium acetate. The formation of the dye has ended after stirring for several hours. It is suctioned off, washed well with water and dried.
A reddish yellow powder is obtained. The preparation of the dye can also take place in the presence of a substrate. If the dye is produced on the fiber, a very lightfast, vivid reddish yellow color is obtained.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE160670X | 1930-09-09 | ||
CH153828T | 1931-05-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH160670A true CH160670A (en) | 1933-03-15 |
Family
ID=25716319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH160670D CH160670A (en) | 1930-09-09 | 1931-05-07 | Process for the preparation of a water-insoluble azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH160670A (en) |
-
1931
- 1931-05-07 CH CH160670D patent/CH160670A/en unknown
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