CH100620A - 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
- CH100620A CH100620A CH100620DA CH100620A CH 100620 A CH100620 A CH 100620A CH 100620D A CH100620D A CH 100620DA CH 100620 A CH100620 A CH 100620A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- preparation
- azo dye
- yellow
- insoluble azo
- Prior art date
Links
Landscapes
- Paper (AREA)
Description
Verfahren zur Darstellung eines wasseruulöslichen Azofarbstoffes. Es wurde gefunden, dass man einen was serunlöslichen Azofarbstoff erhält-, wenn man die Diazoverbindung von 4-Chlor-1 <B>-</B> 3-tolui- din mit Diaoetessigs#iure-o-tolidinid kombi niert, dis durch Kondensation von 2 Mole- kfilen Acetessigester mit o-Toluidin darge stellt wird.
Getrocknet bildet der Farbstoff ein gel bes Pulver, das in Wasser unlöslich, in kon zentrierter Schwefelsäure mit gelber Farbe löslich ist. Mit den gebräuchlichen Substra ten gremischt bildet er einen gelben Lack von sehr -,uten Eehtheitseigenschaften und färbt, pl auf Baumwolle hergestellt, dieselbe in ech ten, gelben Tönen.
<I>Beispiel:</I> <B>27,9</B> Teile 4-Chlor-1 <B>-</B> 3-toluidin werden in der üblichen Weise diazotiert und die Diazolösung mit einer Lösung von. 40 Teilen 1)iaeetessi",si,iure-o-tolidinid in wässerigem en Alhali, welche mit der nötigen Menge Na- friumacefat versetzt ist, zusammengegeben, Nach beendeter Kupplung wird der Farb stoff abfiltriert, gut gewaschen und zur Paste verrieben.
Mit den gebräuchlichen Substrateai "emischt bildet er einen gelben z# Laek von sehr guten Echtlieitseigenschaften.
Process for the preparation of a water-soluble azo dye. It has been found that an azo dye which is insoluble in water is obtained if the diazo compound of 4-chloro-1-3-toluidine is combined with diaoetoacetic acid-o-tolidinide, dis by condensation of 2 Mole- kfilen of acetoacetic ester with o-toluidine is shown.
When dried, the dye forms a yellow powder that is insoluble in water and soluble in concentrated sulfuric acid with a yellow color. Mixed with the usual substrates, it forms a yellow varnish with very good integrity properties and dyes, made on cotton, in real yellow tones.
<I> Example: </I> <B> 27.9 </B> parts of 4-chloro-1 <B> - </B> 3-toluidine are diazotized in the usual way and the diazo solution with a solution of. 40 parts of 1) iaeetessi ", si, iure-o-tolidinid in aqueous en Alhali, which is mixed with the necessary amount of sodium acefate, put together. After the coupling is complete, the dye is filtered off, washed well and rubbed into a paste.
Mixed with the common substrates, it forms a yellow color with very good authenticity properties.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE100620X | 1921-12-13 | ||
CH100186T | 1922-12-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH100620A true CH100620A (en) | 1923-08-01 |
Family
ID=25705721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH100620D CH100620A (en) | 1921-12-13 | 1922-12-05 | Process for the preparation of a water-insoluble azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH100620A (en) |
-
1922
- 1922-12-05 CH CH100620D patent/CH100620A/en unknown
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