CH121005A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121005A
CH121005A CH121005DA CH121005A CH 121005 A CH121005 A CH 121005A CH 121005D A CH121005D A CH 121005DA CH 121005 A CH121005 A CH 121005A
Authority
CH
Switzerland
Prior art keywords
brown
amino
violet
preparation
dye
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 CH121005A publication Critical patent/CH121005A/en

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      Verfahren    zur     Darstellun--    eines     Entwieklerfarhstoifes.       Es wurde gefunden, dass ein wertvoller       Entwicklerfarbstoff    erhalten wird, wenn man       tetrazotiertes        Benzidin    in molekularem Ver  hältnis mit 2'-     1U'        ethyl    - 3'-     amino    - 5'-     sulfo-1-          phenyl-5-pyrazolon-3-kai-bonsäure    zu einem       Zwischenprodukt    vereinigt und dasselbe in  alkalischer Lösung mit     2-Amino-8-naphtol-6-          sulfosäure    weiter 

  kuppelt.  



  Der neue     Farbstoff    bildet ein braun  schwarzes Pulver, das sich in Wasser mit       violettbrauner,    in konzentrierter Schwefel  säure mit blauvioletter Farbe löst. Er färbt  ungeheizte Baumwolle in     violettbraunen    Tönen,  welche durch     Diazotieren    auf der Faser und  nachfolgende Entwicklung mit     Betanapbtol     ohne wesentliche     Nuancenänderung    wasch  echt fixiert werden.  



  <I>Beispiel</I>  Zu der     Tetrazodiphenyllösung    aus 18,4  Teilen     Benzidin    lässt man bei     0-50    C die  Lösung des     Trinatriumsalzes    von 31,3 Teilen       2'-Methyl-3'.        animo-5'-sulfo-l-phenyl-5-pyrazo-          lon-3-karbonsäure    zufliessen. Sobald kein un  verändertes     Tetrazodiphenyl    mehr nachgewie  sen werden kann, gibt man die Lösung von    20 Teilen     calcinierter    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 neutralisiert alsdann die braun  violette Lösung mit Salzsäure und salzt den       Farbstoff    aus.



      Method for the presentation of a developing tool. It has been found that a valuable developer dye is obtained if tetrazotized benzidine is used in a molecular ratio with 2'-1U 'ethyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-kai-bonic acid combined to form an intermediate and the same in alkaline solution with 2-amino-8-naphthol-6-sulfonic acid

  clutch.



  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 unheated cotton in violet-brown tones, which are fixed by diazotizing on the fiber and subsequent development with Betanapbtol without any significant change in shade.



  <I> Example </I> The solution of the trisodium salt of 31.3 parts of 2'-methyl-3 'is added to the tetrazodiphenyl solution of 18.4 parts of benzidine at 0-50 ° C. Animo-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid flow in. As soon as no more unchanged tetrazodiphenyl 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)

<B>PATENTANSPRUCH</B> Verfahren zur Darstellung eines Ent- wicklerfarbstoffes, dadurch gekennzeichet, dass man tetrazotiertes Benzidin in molekularem Verhältnis mit 2'-1VIethyl-3'-amino-5'-sulfo-l- phenyl-5-pyrazolon-3-karbonsäure zu einem Zwischenprodukt vereinigt und dasselbe in alkalischer Lösung mit 2-Amino-S-naphtol-6- sulfosäure weiterkuppelt. Der neue Farbstoff bildet ein braunschwarzes Pulver, <B> PATENT CLAIM </B> Process for the preparation of a developer dye, characterized in that tetrazotized benzidine is mixed in a molecular ratio with 2'-1VIethyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone- 3-carboxylic acid combined to form an intermediate and the same coupled further in alkaline solution with 2-amino-S-naphthol-6-sulfonic acid. The new dye forms a brown-black powder, das sich in Wasser mit violettbrauner, in konzentrierter Schwefelsäure mit blauvioletter Farbe löst. Er färbt ungeheizte Baumwolle in violett braunen Tönen, welche durch Diazotieren auf der Faser und nachfolgende Entwicklung mit Betanaphtol ohne wesentliche Nuancenände- rung waschecht fixiert werden. which dissolves in water with a violet-brown color, in concentrated sulfuric acid with a blue-violet color. It dyes unheated cotton in purple-brown tones, which are fixed by diazotizing on the fiber and subsequent development with betanaphtol without any significant change in shade.
CH121005D 1925-03-28 1925-11-02 Process for the preparation of a developer dye. CH121005A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE121005X 1925-03-28
CH119229T 1925-10-17

Publications (1)

Publication Number Publication Date
CH121005A true CH121005A (en) 1927-06-16

Family

ID=25709189

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121005D CH121005A (en) 1925-03-28 1925-11-02 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121005A (en)

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