CH121006A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121006A
CH121006A CH121006DA CH121006A CH 121006 A CH121006 A CH 121006A CH 121006D A CH121006D A CH 121006DA CH 121006 A CH121006 A CH 121006A
Authority
CH
Switzerland
Prior art keywords
brown
preparation
violet
dye
amino
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 CH121006A publication Critical patent/CH121006A/en

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Description

  

      Verfahren        zur        Darstellung    eines     Entwicklerfarbstoffes.       . Es wurde gefunden, dass ein wertvoller       Entwicklerfarbstoff    erhalten wird,- wenn man       tetrazotiertes        o-Tolidin    in molekularem Ver  hältnis mit     2'-Methyl-3'-amino-5'-sulfo-l-          phenyl-5-pyrazolon-3-karbonsäure    zu einem  Zwischenprodukt vereinigt und dasselbe in  alkalischer Lösung mit     2-Amino-8-naphtol-6-          sulfosäure        weiterkuppelt.     



  Der neue Farbstoff bildet ein braun  schwarzes Pulver, das sich in Wasser mit       violettbrauner,    in konzentrierter Schwefelsäure  mit blauvioletter Farbe löst. Er färbt     unge-          beizte    Baumwolle in     violettbraunen    Tönen,  welche durch     Diazotieren    auf der Faser und  nachfolgende Entwicklung mit     Betanaphtol     ohne wesentliche     Nuancenänderung    waschecht  fixiert werden.  



  <I>Beispiel:</I>  Zu der     Tetrazoditolyllösung    aus 21,2  Teilen     o-Tolidin    lässt man bei 0-5  C die  Lösung des     Trinatriumsalzes    von 31,3 Teilen 2'       1VIethyl-3'-amino-5'-sulfo-l-phenyl-5-pyrazolon-          3-karbonsäure    zufliessen. Sobald kein unver  ändertes     Tetrazoditolyl    mehr nachgewiesen  werden kann, gibt man die Lösung von 20  Teilen     kalzinierter    Soda und hierauf die    schwach     phenolphtalein-alkalische    Lösung von  23,9 Teilen     2-Amino-8-naphtol-6-sulfosäure    zu.  Die     Kombination    ist nach wenigen Stunden  beendigt.

   Man     neutrali,iert    alsdann die braun  violette Lösung mit Salzsäure und salzt den  Farbstoff aus.



      Process for the preparation of a developer dye. . It has been found that a valuable developer dye is obtained - if one adds tetrazotized o-tolidine in a molecular ratio with 2'-methyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid combined with an intermediate product and coupled the same in alkaline solution with 2-amino-8-naphthol-6-sulfonic acid.



  The new dye forms a brown-black powder that dissolves in water with a violet-brown color, and in concentrated sulfuric acid with a blue-violet color. It dyes unpickled cotton in violet-brown shades, which are fixed by diazotizing on the fiber and subsequent development with betanaphtol without any significant change in shade.



  <I> Example: </I> To the tetrazoditolyl solution of 21.2 parts of o-tolidine, the solution of the trisodium salt of 31.3 parts of 2 '1VIethyl-3'-amino-5'-sulfo- l-phenyl-5-pyrazolone-3-carboxylic acid flow in. As soon as no more unchanged tetrazoditolyl can be detected, the solution of 20 parts of calcined soda and then the weakly phenolphthalein-alkaline solution of 23.9 parts of 2-amino-8-naphthol-6-sulfonic acid are added. The combination ends after a few hours.

   The brown-violet solution is then neutralized with hydrochloric acid and the dye is salted out.

 

Claims (1)

PATENTANSPRUCH: Verfahren zurDarstellung einesEntwickler- farbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes o-Tolidin in molekularem Ver hältnis mit 2'-Methyl-3'-amino-5'-sulfo-l- phenyl-5-pyrazolon-3-karbonsäure zu einem Zwischenprodukt vereinigt und dasselbe in alkalischer Lösung mit 2-Amiuo-8-naphtol-6- sulfosäure weiterkuppelt. Der neue Farbstoff bildet ein braunschwarzes Pulver, das sich in Wasser mit violettbraunner, Claim: method for the preparation of a developer dye, characterized in that tetrazotized o-tolidine in a molecular ratio with 2'-methyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid to one Combined intermediate product and the same in alkaline solution with 2-Amiuo-8-naphthol-6-sulfonic acid coupled. The new dye forms a brown-black powder that turns into purple-brown, in konzen trierter Schwefelsäure mit blauvioletter Farbe löst. Er färbt. ungeheizte Baumwolle in violettbraunen Tönen, welche durch Diazo- tieren auf der Faser und nachfolgende Ent wicklung mit Betanaphtol ohne wesentliche Nuancenänderung waschecht fixiert werden. dissolves in concentrated sulfuric acid with a blue-violet color. He colors. unheated cotton in violet-brown tones, which are fixed by diazotizing on the fiber and subsequent development with betanaphtol without any significant change in shade.
CH121006D 1925-03-28 1925-11-02 Process for the preparation of a developer dye. CH121006A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE121006X 1925-03-28
CH119229T 1925-10-17

Publications (1)

Publication Number Publication Date
CH121006A true CH121006A (en) 1927-06-16

Family

ID=25709190

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121006D CH121006A (en) 1925-03-28 1925-11-02 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121006A (en)

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