CH219575A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH219575A
CH219575A CH219575DA CH219575A CH 219575 A CH219575 A CH 219575A CH 219575D A CH219575D A CH 219575DA CH 219575 A CH219575 A CH 219575A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
dye
acid
aminobenzene
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 CH219575A publication Critical patent/CH219575A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
    • C09B29/08—Amino benzenes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines     Azofarbstoffes.       Gegenstand .des Hauptpatentes ist     ein     Verfahren zur Herstellung     eines        Azofarb-          stoffes,    welches dadurch gekennzeichnet ist,  dass man     2-Chlor-4-nitro-l-aminobenzol-6-sul-          fonsäure        dia.zotiert    und mit     Dioxyäthyl-m-          toluidin    kuppelt.  



  Es wurde nun gefunden, dass man Farb  stoffe, die sich     dureh    besonders gute Wasser  echtheit ihrer     Färbungen    von Leder auszeich  nen, dann erhält,     wenn    man     ein.        4-Nitro-l-          aminobenzol    der allgemeinen Formel  
EMI0001.0017     
    in welcher X eine wasserlöslich machende  Gruppe und Y eine     negative    Gruppe bedeu  ten,     diazotiert    und mit einem in der     3-Stel-          lung    durch eine wasserlöslich machende         Gruppe,    zum Beispiel eine     803H-    oder Car  bonsäuregruppe,

       substituierten        Anilin    der  allgemeinen Formel  
EMI0001.0026     
    kuppelt, wobei R und R' gegebenenfalls sub  stituierte     Alkylgruppen    bedeuten. Diese  neuen Farbstoffe färben Leder schon in ge  ringer Konzentration in braunen Tönen  gleichmässig durch.  



  Gegenstand des     vorliegenden.    Zusatzpa  tentes ist ein Verfahren zur Herstellung     .eines          Azofarbstoffes,    welches dadurch gekenn  zeichnet ist,     dass    man     2-Chlor-4-nitro-l-amino-          benzol-6-sulfonsäure        diazotiert    und     mit        3-Di-          methylaminobenzolsulfonsäure    (1) kuppelt.

      <I>Beispiel:</I>  27,5 Teile     2-chlor-4-nitranilin-6-sulfon-          saures    Natrium werden, wie im     Hauptpatent         beschrieben,     diazotiert    und mit     ?0,1    Teilen       3-Dimethylaminobenzolsulfonsäure    (1) essig  sauer gekuppelt. Nach beendeter     Kupplung     wird der Farbstoff     ausgesalzen.    Er stellt  nach dem     Troeknen    ein rotes Pulver dar, wel  ches sich mit rotbrauner Farbe in Wasser  löst und     Leder    in schönen braunen Tönen  gleichmässig und echt durchfärbt.



  Process for the preparation of an azo dye. The subject of the main patent is a process for the production of an azo dye, which is characterized in that 2-chloro-4-nitro-1-aminobenzene-6-sulphonic acid is dia.zotiert and coupled with dioxyethyl-m-toluidine.



  It has now been found that dyes that are distinguished by their particularly good waterfastness in their dyeing of leather are obtained if one. 4-nitro-l-aminobenzene of the general formula
EMI0001.0017
    in which X is a water-solubilizing group and Y is a negative group, diazotized and with one in the 3-position by a water-solubilizing group, for example an 803H or carboxylic acid group,

       substituted aniline of the general formula
EMI0001.0026
    couples, where R and R 'are optionally substituted alkyl groups. These new dyes evenly dye leather in a low concentration in brown tones.



  Subject of the present. Additional patent is a process for the production of an azo dye which is characterized in that 2-chloro-4-nitro-1-aminobenzene-6-sulfonic acid is diazotized and coupled with 3-dimethylaminobenzenesulfonic acid (1).

      <I> Example: </I> 27.5 parts of 2-chloro-4-nitroaniline-6-sulfonic acid sodium are, as described in the main patent, diazotized and acidic with 0.1 part of 3-dimethylaminobenzenesulfonic acid (1) coupled. After the coupling has ended, the dye is salted out. After drying, it represents a red powder, which dissolves in water with a red-brown color and dyes leather evenly and genuinely in beautiful brown tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man t,-Cblor-l-riitro-l-aminobenzol-6-sulfon- sä.ure diazotiert und mit 3-Dimethylamino- benzolsulfonsäure (1) kuppelt. Der erhaltene Farbstoff ist ein rotes Pulver. welches sich mit rotbrauner Farbe in Wasser löst und Le der in braunen Tönen gleichmässig und echt clui-chfärbt. Claim: Process for the production of an azo dye, characterized in that t, -Cblor-l-riitro-l-aminobenzene-6-sulfonic acid is diazotized and coupled with 3-dimethylaminobenzenesulfonic acid (1). The dye obtained is a red powder. which dissolves in water with a reddish-brown color and which dyes in brown tones evenly and genuinely clui-ch.
CH219575D 1938-04-26 1938-08-27 Process for the preparation of an azo dye. CH219575A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE219575X 1938-04-26
CH203691T 1938-08-27

Publications (1)

Publication Number Publication Date
CH219575A true CH219575A (en) 1942-02-15

Family

ID=25723958

Family Applications (1)

Application Number Title Priority Date Filing Date
CH219575D CH219575A (en) 1938-04-26 1938-08-27 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH219575A (en)

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