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CH124138A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH124138A
CH124138A CH124138DA CH124138A CH 124138 A CH124138 A CH 124138A CH 124138D A CH124138D A CH 124138DA CH 124138 A CH124138 A CH 124138A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dyes
dye
methyl
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH124138A publication Critical patent/CH124138A/en

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Description

  

      Verfahren    zur     Darstellung    eines     Azofarbstoffes:       Es ist gefunden worden, dass man ganz  allgemein zu     Azofarbstoffen    mit wertvollen  Echtheitseigenschaften gelangt, wenn man  zu deren Aufbau     Diazotierungs-    oder Kupp  lungskomponenten verwendet, die in der     Diazo-          oder    Kupplungskomponente oder in beiden  gleichzeitig eine oder mehrere     Carbonsäure-          estergruppen    enthalten.  



  Besitzen die Farbstoffe neben diesen       Carbonsäureestergruppen    noch     chromierfähige     Gruppen, z. B. in der     Diazokomponente    einen       Anthranilsäure-    oder     o-Aminophenolkomplex     oder in der Kupplungskomponente z. B. einen       Salicylsäure-    oder     Chromotropsäurerest,    so  können die Echtheitseigenschaften durch       Nachchromieren    noch weiter erhöht werden.  



  Je nach dem Charakter der zum Aufbau  der Farbstoffe benutzten Komponenten können  diese als Pigment-,     Woll-,    Seide-,     Acetatseide-          oder    als Substantive Farbstoffe verwendet  werden.  



  Gegenstand dieses Patentes ist ein Ver  fahren zur Darstellung eines derartigen Farb  stoffes durch Kuppeln von     diazotiertem          Anthranilsäuremethylester    mit 1     (2'-Chlor-5'-          sulfophenyl)-3-methyl-5-pyrazolon.            Beispiel:     310,5 Gewichtsteile des     Natriumsalzes    des  1     (2'-Chlor-5'-sulfophenyl)-3-methyl-5-pyra-          zolons    werden in Wasser unter Zusatz von  überschüssiger     Natriumaeetatlösung    gelöst.

    Dazu läuft eine in normaler Weise erhaltene       Diazoverbindung    aus 151 Gewichtsteilen       o-Aminobenzoesäuremethylester.     



  Der mit wenig Kochsalzlösung abgeschie  dene Farbstoff stellt nach dem Absaugen und  Trocknen ein gelbes Pulver dar, welches  Wolle und Seide in einem sehr egalen, gelben  Farbton anfärbt.



      Process for the preparation of an azo dye: It has been found that in general azo dyes with valuable fastness properties can be obtained if diazotization or coupling components are used in the diazo or coupling component or in both at the same time one or more carboxylic acid contain ester groups.



  In addition to these carboxylic acid ester groups, the dyes also have chromable groups, e.g. B. in the diazo component an anthranilic acid or o-aminophenol complex or in the coupling component z. B. a salicylic acid or chromotropic acid residue, the fastness properties can be further increased by chromium plating.



  Depending on the character of the components used to build up the dyes, these can be used as pigment, wool, silk, acetate silk or as noun dyes.



  The subject of this patent is a process for the preparation of such a dye by coupling diazotized methyl anthranilate with 1 (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone. Example: 310.5 parts by weight of the sodium salt of 1 (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone are dissolved in water with the addition of excess sodium acetate solution.

    A diazo compound obtained in the normal way from 151 parts by weight of methyl o-aminobenzoate runs for this purpose.



  The dye deposited with a little saline solution is a yellow powder after suction and drying, which dyes wool and silk in a very even, yellow shade.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eifies Azofarb- stoffes, dadurch gekennzeichnet, dass man diazotierten Anthranilsäuremethylester mit 1 (2'-Chlor-5'-sulfophenyl)-3-methyl-5-pyra- zolon kuppelt. Der Farbstoff stellt ein gelbes Pulver dar, welches Wolle und Seide in einem sehr egalen, gelben Farbton anfärbt. PATENT CLAIM: Process for the preparation of eifies azo dyes, characterized in that diazotized anthranilic acid methyl ester is coupled with 1 (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone. The dye is a yellow powder that dyes wool and silk in a very even, yellow shade.
CH124138D 1925-11-19 1926-11-16 Process for the preparation of an azo dye. CH124138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE124138X 1925-11-19

Publications (1)

Publication Number Publication Date
CH124138A true CH124138A (en) 1928-01-02

Family

ID=5658098

Family Applications (1)

Application Number Title Priority Date Filing Date
CH124138D CH124138A (en) 1925-11-19 1926-11-16 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH124138A (en)

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