CH121009A - Process for the preparation of a developer dye. - Google Patents
Process for the preparation of a developer dye.Info
- Publication number
- CH121009A CH121009A CH121009DA CH121009A CH 121009 A CH121009 A CH 121009A CH 121009D A CH121009D A CH 121009DA CH 121009 A CH121009 A CH 121009A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- dissolves
- brown
- developer
- Prior art date
Links
Landscapes
- Coloring (AREA)
- Developing Agents For Electrophotography (AREA)
Description
Verfahren zur Darstellung eines EntWicllerfarustoffes. Es wurde gefunden, dass ein wertvoller Entwicklerfarbstoff erhalten wird, wenn man tetrazotiertes Benzidin in molekularem Ver hältnis mit 2'-Methyl-3'-amino-5'-sulfo-l-phe- nyl-5-pyrazolon-3-karbonsäure zu einem-Zwi- schenprodukt vereinigt und dasselbe in alka lischer Lösung mit dem Monoazofarbstoff aus 1-Diazo-4-aminobenzol-3-sulfosäure und Me- tatoluylendiamin
weiterkuppelt. Der neue Farbstoff bildet ein schwarzes Pulver, das sich in Wasser mit brauner, in konzentrierter Schwefelsäure mit violetter Farbe löst. Er färbt ungeheizte Baumwolle in rotbraunen Tönen, welche durch Diazotieren auf der Faser und nachfolgende Entwicklung mit Beta- naphtol ohne. wesentliche Nuancenänderung waschecht fixiert werden.
Beispiel: Zu der Tetrazodiphenyllösung aus 18,4 Tei len Benzidin lässt man bei<B>0-50</B> C die Lösung des Trinatriumsalzes von 31,3 Teilen 2' Methyl - 3'- amino - 5'- sulfo -1-phenyl-5-pyrazo- lon-3-karbonsäure zugiessen.
Sobald unver ändertes Tetrazodiphenyl nicht mehr nach- gewiesen werden kann; gibt man die Lösung von 20 Teilen calzinierter Soda zu und hier auf die sodaalkalische Lösung des Monoazo- farbstoffes, erhalten aus der Diazoverbindung von 18,8 Teilen Paraphenylendiaminsulfosäure und 12,3 Teilen Metatoluylendiamin. Das Zwischenprodukt tritt rasch in Reaktion, wel che unter Bildung einer tiefbraunen Lösung nach wenigen Stunden beendet ist.
Die über schüssige Soda wird alsdann mit Salzsäure neutralisiert und der Trisazofarbstoff ausge- salzen.
Process for the preparation of a developer dye. It has been found that a valuable developer dye is obtained if tetrazotized benzidine is in a molecular ratio with 2'-methyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid to form a Intermediate product combined and the same in alkaline solution with the monoazo dye from 1-diazo-4-aminobenzene-3-sulfonic acid and metatoluylenediamine
further coupled. The new dye forms a black powder that dissolves in water with a brown color, and in concentrated sulfuric acid with a purple color. It dyes unheated cotton in red-brown shades, which by diazotizing the fiber and subsequent development with betanaphtol without. essential changes in nuance can be fixed in a wash-fast manner.
Example: The solution of the trisodium salt of 31.3 parts of 2'-methyl-3'-amino-5'-sulfo -1 is added to the tetrazodiphenyl solution of 18.4 parts of benzidine at <B> 0-50 </B> C Pour in -phenyl-5-pyrazolone-3-carboxylic acid.
As soon as unchanged tetrazodiphenyl can no longer be detected; the solution of 20 parts of calcined soda is added and here to the soda-alkaline solution of the monoazo dye obtained from the diazo compound of 18.8 parts of paraphenylenediaminesulfonic acid and 12.3 parts of metatolylenediamine. The intermediate product reacts quickly, which ends after a few hours with the formation of a deep brown solution.
The excess soda is then neutralized with hydrochloric acid and the trisazo dye is salted out.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE121009X | 1925-03-28 | ||
CH119229T | 1925-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH121009A true CH121009A (en) | 1927-06-16 |
Family
ID=25709193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH121009D CH121009A (en) | 1925-03-28 | 1925-11-02 | Process for the preparation of a developer dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH121009A (en) |
-
1925
- 1925-11-02 CH CH121009D patent/CH121009A/en unknown
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