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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
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH121009A publication Critical patent/CH121009A/en

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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)

PATENTANSPRUCH: Verfahren zur Darstellung eines Entwick- lerfarbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes Benzidin in molekularem Verhältnis mit 2'-3Zethyl - 3'- amino - 5'- sulfo- 1-phenyl-5-pyrazolon-3-karbonsäure zu einem Zwischenprodukt vereinigt und dasselbe in alkalischer Lösung mit dem Monoazofarbstoff aus 1-Diazo-4-aminobenzol-3-sulfosäure und Metatoluylendiamin weiterkuppelt. Der neue Farbstoff Claim: method for the preparation of a developer dye, characterized in that tetrazotized benzidine in a molecular ratio with 2'-3Zethyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid to an intermediate product combined and the same in alkaline solution with the monoazo dye from 1-diazo-4-aminobenzene-3-sulfonic acid and metatoluylenediamine coupled. The new dye 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 Betanaphtol ohne wesentliche Nuancenände- rung waschecht fixiert werden. forms a black powder that dissolves in water with brown; dissolves in concentrated sulfuric acid with purple color. It dyes unheated cotton in red-brown tones, which are fixed by diazotizing on the fiber and subsequent development with betanaphtol without any significant change in shade.
CH121009D 1925-03-28 1925-11-02 Process for the preparation of a developer dye. CH121009A (en)

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)

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