CH189053A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH189053A
CH189053A CH189053DA CH189053A CH 189053 A CH189053 A CH 189053A CH 189053D A CH189053D A CH 189053DA CH 189053 A CH189053 A CH 189053A
Authority
CH
Switzerland
Prior art keywords
preparation
monoazo dye
dye
pyrazolone
anthranilic acid
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 CH189053A publication Critical patent/CH189053A/en

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Description

  

  Verfahren zur Herstellung eines     blonoazofarbstoffes.       Gemäss dem im Hauptpatent beschriebenen  Verfahren erhält man einen Wolle in echten  Tönen anfärbenden     Azofarbstoff,    wenn man       Anthranilsäure    dianotiert und die     Diazover-          bindung    mit einem     Pyrazolon    kuppelt, wel  ches in der     1-Stellung    durch einen     Phenylrest     substituiert ist, der noch durch einen     Sulf-          amidophenylrest    weiter substituiert ist.  



  Wie nun weiter gefunden wurde, erhält  man einen Farbstoff von ganz ähnlichen  Eigenschaften, wenn man     Anthranilsäure     dianotiert und die     Diazoverbindung    mit dem       Pyrazolon    der nachstehenden Formel kom  biniert:

    
EMI0001.0014     
    <I>Beispiel:</I>    137 Teile     Anthranilsäure    werden in üb  licher Weise dianotiert und in     sodaalkalischer     Lösung kombiniert mit 392 Teilen eines       Pyrazolons    folgender     Formel:       
EMI0002.0001     
    Man erhält einen gelben     Farbstoff,    der sich  nach dem     Nachchromierungsverfahren    färben  lässt und gelbe     Färbungen    von sehr guter  Allgemeinechtheit ergibt.



  Process for the preparation of a blonoazo dye. According to the process described in the main patent, an azo dye that dyes wool in real shades is obtained if anthranilic acid is dianotized and the diazo compound is coupled with a pyrazolone, which is substituted in the 1-position by a phenyl radical which is also substituted by a sulfamidophenyl radical is further substituted.



  As has now been found, a dye with very similar properties is obtained if anthranilic acid is dianotized and the diazo compound is combined with the pyrazolone of the following formula:

    
EMI0001.0014
    <I> Example: </I> 137 parts of anthranilic acid are dianotized in the usual way and combined in a soda-alkaline solution with 392 parts of a pyrazolone with the following formula:
EMI0002.0001
    A yellow dye is obtained which can be colored by the post-chrome plating process and gives yellow colorations of very good all-round fastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Mono azofarbstoffes, dadurch gekennzeichnet, dass man Anthranilsäure diazotiert und die Di- azoverbindung mit dem Pyrazolon der nach stehenden Formel kuppelt: EMI0002.0009 Der Farbstoff färbt Wolle nach dem Nachchromierungsverfahren in echten gelben Tönen an. PATENT CLAIM: Process for the preparation of a mono azo dye, characterized in that anthranilic acid is diazotized and the diazo compound is coupled with the pyrazolone of the formula below: EMI0002.0009 The dye stains wool in real yellow shades using the post-chrome plating process.
CH189053D 1934-06-20 1935-05-29 Process for the preparation of a monoazo dye. CH189053A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE189053X 1934-06-20
CH185147T 1935-05-29

Publications (1)

Publication Number Publication Date
CH189053A true CH189053A (en) 1937-01-31

Family

ID=25721169

Family Applications (1)

Application Number Title Priority Date Filing Date
CH189053D CH189053A (en) 1934-06-20 1935-05-29 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH189053A (en)

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