CH100186A - Process for the preparation of a water-insoluble azo dye. - Google Patents

Process for the preparation of a water-insoluble azo dye.

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Publication number
CH100186A
CH100186A CH100186DA CH100186A CH 100186 A CH100186 A CH 100186A CH 100186D A CH100186D A CH 100186DA CH 100186 A CH100186 A CH 100186A
Authority
CH
Switzerland
Prior art keywords
water
preparation
azo dye
orange
insoluble azo
Prior art date
Application number
Other languages
German (de)
Inventor
Griesheim-Elektron Chem Fabrik
Original Assignee
Griesheim Elektron Chem Fab
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 Griesheim Elektron Chem Fab filed Critical Griesheim Elektron Chem Fab
Publication of CH100186A publication Critical patent/CH100186A/en

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  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Paper (AREA)

Description

  

  Verfahren zur Darstellung eines     wasseranlöslichen        Azofarbstoffes.       Es wurde gefunden,     dass    man einen     was-          serunlösliellen        Azofarbstoff    erhält, wenn man  die     Diazoverbinclung    von     m-Nitro-o-toluidiii          (CW   <B><I>:</I></B>     NI12   <B><I>: NO'<U>-</U></I> 1: 2:5)</B> mit     Dia,cetessig-          säurebenzidinid    kombiniert, das durch Kon  densation von 2 Molekülen     Acetessigester    mit       Benzidin    dargestellt wird.

    



  Getrocknet bildet der Farbstoff ein       orangegefärbtes    Pulver, das in Wasser un  löslich, in konzentrierter Schwefelsäure mit       braun"elber    Farbe löslich ist.     Mit    den     ge-          en          bräuchlielien    Substraten gemischt, bildet er  einen orangegelben     Laeh    von sehr guten  <B>n</B>       Echtheifseigenschaften        und    färbt, auf     Baum-          ,volle    hergestellt, dieselbe in echten orange  gelben Tönen.  



  <I>Beispiel:</I>  30,4 Teile     m-Nitro-o-toluidin   <B>(CH' .</B>     NR2          NO2   <B>= 1 :</B> 2<B>: 5)</B> werden in der     übliehen     Weise     diazotiert    und die     Diazolbsung    mit  einer Lösung von<B>37</B> Teilen     Diacetessigsäure-          benzidinid    in wässerigem Alkali, welche mit       t'          fler    nötigen Menge     Natriumacetat    versetzt  ist, zusammengegeben. Nach beendigter    Kupplung wird der Farbstoff     abfiltriert,    gut  gewaschen     und    zur Paste verrieben.

   Mit den  gebräuchlichen Substraten gemischt, bildet er  einen     oraaigegelben    Lack von sehr guten       Echtlieitseigenschaften.  



  Process for the preparation of a water-soluble azo dye. It has been found that a water-insoluble azo dye is obtained if the diazo compound of m-nitro-o-toluidiii (CW <B><I>:</I> </B> NI12 <B> <I>: NO '<U> - </U> </I> 1: 2: 5) </B> combined with diacetacetic acid benzidinide, which is produced by the condensation of 2 molecules of acetoacetic ester with benzidine.

    



  When dried, the dye forms an orange-colored powder that is insoluble in water and soluble in concentrated sulfuric acid with a brownish-yellow color. Mixed with the common substrates, it forms an orange-yellow color of very good <B> n </B> Authenticity properties and colors, made on tree, full, the same in real orange yellow tones.



  <I> Example: </I> 30.4 parts of m-nitro-o-toluidine <B> (CH '. </B> NR2 NO2 <B> = 1: </B> 2 <B>: 5) Are diazotized in the usual way and the diazole solution is combined with a solution of 37 parts of diacetoacetic acid benzidinide in aqueous alkali to which the necessary amount of sodium acetate is added. When the coupling is complete, the dye is filtered off, washed well and rubbed into a paste.

   Mixed with the common substrates, it forms an orange-yellow lacquer with very good authenticity properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines wasser unlöslichen Azofarbstoffes, der getrocknet ein orangegefärbtes Pulver bildet, das in Wasser unlöslich, in konzentrierter Schwefel säure mit braurigeiber Farbe löslich ist, wel- eher Farbstoff mit den gebräucIlliellen Sub straten gemischt, einen o-raiigegelbeii Lack von sehr guten Echtheitseigenschaften liefert und, auf Baumwolle hergestellt, dieselbe in echten, orangegelben Tönen färbt, dadurch gekennzeichnet, PATENT CLAIM: Process for the preparation of a water-insoluble azo dye which, when dried, forms an orange-colored powder that is insoluble in water, soluble in concentrated sulfuric acid with a brownish-brown color, which is mixed with the common sub-strates, an o-raiy-gel lacquer of very provides good fastness properties and, produced on cotton, dyes the same in genuine, orange-yellow tones, characterized in that dass man die Diazoverbin- dung von m-Nitro-o-toluidin (CH':NH2:NO' <B>=I</B> :2<B>:5)</B> mit Diacetessigsäurebenzidinid kombiniert. that the diazo compound of m-nitro-o-toluidine (CH ': NH2: NO' <B> = I </B>: 2 <B>: 5) </B> is combined with diacetoacetic acid benzidinide.
CH100186D 1921-12-13 1922-12-05 Process for the preparation of a water-insoluble azo dye. CH100186A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE100186X 1921-12-13

Publications (1)

Publication Number Publication Date
CH100186A true CH100186A (en) 1923-07-02

Family

ID=5648443

Family Applications (1)

Application Number Title Priority Date Filing Date
CH100186D CH100186A (en) 1921-12-13 1922-12-05 Process for the preparation of a water-insoluble azo dye.

Country Status (1)

Country Link
CH (1) CH100186A (en)

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