CH157555A - 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
- CH157555A CH157555A CH157555DA CH157555A CH 157555 A CH157555 A CH 157555A CH 157555D A CH157555D A CH 157555DA CH 157555 A CH157555 A CH 157555A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- water
- insoluble azo
- azo dye
- dye
- Prior art date
Links
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- 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 wasserunlös lichen Azofarbstoffes, das dadurch gekenn zeichnet ist, dass man die Diazoverbindung von m-Chloranilin mit Terephtaloyl-bis-essig säure-l-amino-4-chlor-2-methoxy-5-methylben- zol kuppelt. Die Einwirkung der beiden Kom ponenten aufeinander kann auch in Gegen wart eines Substrates erfolgen.
Der in Substanz hergestellte Farbstoff bildet ein grünstichig gelbes Pulver; die Fär bungen besitzen einen lebhaften, grünstichig gelben Farbton und sind sehr gut lichtecht. <I>Beispiel:</I> <B>53,3</B> gr Terephtaloyl -bis - essigsäure -1 amino-4-chlor-2-methogy-5-methylbenzol wer den in 100 emu doppelt normaler Natron lauge und Wasser heiss gelöst.
Diese Lösung läuft zu einer wie folgt bereiteten Diazo- lösung : 25,6 gr m-Chloranilin werden mit 52 cm' Salzsäure von 22 B6 und 14,4 gr Natriumnitrit unter Eiszusatz wie üblich dia- zotiert und mit Natriumacetat auf Kongo neutralität abgestumpft. Die Farbstoffbildung ist nach mehrstün digem Nachrühren beendet. Man saugt ab, wäscht gut mit Wasser und trocknet.
Man erhält ein grünstichig gelbes Pulver. Die Darstellung des Farbstoffes kann auch in Gegenwart eines Substrates erfolgen. Wird der Farbstoff auf der Faser erzeugt, so er hält man einen sehr lichtechten, lebhaften, grünstichig 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 m-chloroaniline with terephtaloyl-bis-acetic acid-l-amino-4-chloro-2-methoxy-5-methylbene - zol couples. The action of the two components on one another can also take place in the presence of a substrate.
The dye produced in substance forms a greenish yellow powder; the colors have a lively, greenish yellow hue and are very lightfast. <I> Example: </I> <B> 53.3 </B> gr terephtaloyl-bis-acetic acid -1 amino-4-chloro-2-methogy-5-methylbenzene are mixed in 100 emu of double normal sodium hydroxide and Hot water dissolved.
This solution runs into a diazo solution prepared as follows: 25.6 g of m-chloroaniline are diazotized as usual with 52 cm 2 of hydrochloric acid of 22 B6 and 14.4 g of sodium nitrite with the addition of ice and blunted to Congo neutrality with sodium acetate. The dye formation is complete after several hours of stirring. It is suctioned off, washed well with water and dried.
A greenish 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, it is kept in a very lightfast, lively, greenish yellow color.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE157555X | 1930-09-09 | ||
CH153828T | 1931-05-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH157555A true CH157555A (en) | 1932-09-30 |
Family
ID=25716315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH157555D CH157555A (en) | 1930-09-09 | 1931-05-07 | Process for the preparation of a water-insoluble azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH157555A (en) |
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1931
- 1931-05-07 CH CH157555D patent/CH157555A/en unknown
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