CH100620A - 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
CH100620A
CH100620A CH100620DA CH100620A CH 100620 A CH100620 A CH 100620A CH 100620D A CH100620D A CH 100620DA CH 100620 A CH100620 A CH 100620A
Authority
CH
Switzerland
Prior art keywords
water
preparation
azo dye
yellow
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 CH100620A publication Critical patent/CH100620A/en

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Description

  

  Verfahren     zur    Darstellung eines     wasseruulöslichen        Azofarbstoffes.       Es wurde gefunden,     dass    man einen was  serunlöslichen     Azofarbstoff    erhält-, wenn man  die     Diazoverbindung    von     4-Chlor-1   <B>-</B>     3-tolui-          din    mit     Diaoetessigs#iure-o-tolidinid    kombi  niert, dis durch Kondensation von 2     Mole-          kfilen        Acetessigester    mit     o-Toluidin    darge  stellt wird.  



  Getrocknet bildet der Farbstoff ein gel  bes Pulver, das in Wasser unlöslich, in kon  zentrierter Schwefelsäure mit gelber Farbe  löslich ist. Mit den gebräuchlichen Substra  ten     gremischt    bildet er einen gelben Lack von  sehr     -,uten        Eehtheitseigenschaften    und färbt,       pl     auf Baumwolle hergestellt, dieselbe in ech  ten, gelben Tönen.

      <I>Beispiel:</I>    <B>27,9</B> Teile     4-Chlor-1   <B>-</B>     3-toluidin    werden  in     der    üblichen Weise     diazotiert    und die       Diazolösung    mit einer Lösung von. 40 Teilen       1)iaeetessi",si,iure-o-tolidinid    in wässerigem  en       Alhali,    welche mit der nötigen Menge     Na-          friumacefat    versetzt ist, zusammengegeben,    Nach beendeter Kupplung wird der Farb  stoff     abfiltriert,    gut gewaschen und zur  Paste verrieben.

   Mit den gebräuchlichen       Substrateai        "emischt    bildet er einen gelben       z#          Laek    von sehr guten     Echtlieitseigenschaften.  



  Process for the preparation of a water-soluble azo dye. It has been found that an azo dye which is insoluble in water is obtained if the diazo compound of 4-chloro-1-3-toluidine is combined with diaoetoacetic acid-o-tolidinide, dis by condensation of 2 Mole- kfilen of acetoacetic ester with o-toluidine is shown.



  When dried, the dye forms a yellow powder that is insoluble in water and soluble in concentrated sulfuric acid with a yellow color. Mixed with the usual substrates, it forms a yellow varnish with very good integrity properties and dyes, made on cotton, in real yellow tones.

      <I> Example: </I> <B> 27.9 </B> parts of 4-chloro-1 <B> - </B> 3-toluidine are diazotized in the usual way and the diazo solution with a solution of. 40 parts of 1) iaeetessi ", si, iure-o-tolidinid in aqueous en Alhali, which is mixed with the necessary amount of sodium acefate, put together. After the coupling is complete, the dye is filtered off, washed well and rubbed into a paste.

   Mixed with the common substrates, it forms a yellow color with very good authenticity properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines wasser unlöslichen Azofarbstoffes, der getrocknet ein 0,elbes Pulver bildet, das in Wasser unlöslich, in konzentrierter Schwefelsäure mit gelber Farbe löslich ist, wel-eher Farbstoff, mit den gebräuchlichen Substraten gemischt, einen gelben Lack von sehr guten Echtlieitsei"en- sehaften liefert und, auf Baumwolle herge stellt, in echten, gelben Tönen färbt, dadurch gekennzeichnet, PATENT CLAIM: Process for the preparation of a water-insoluble azo dye which, when dried, forms a 0, same powder which is insoluble in water, soluble in concentrated sulfuric acid with a yellow color, wel-rather dye, mixed with the common substrates, a yellow lacquer of very good quality Authenticity supplies and, produced on cotton, dyes in real, yellow tones, characterized in that dass man die Diazoverbindung von 4-Chlor-1 -3-toliiiclin mit Diatetessig- s 'iure -o-tolidinid kombiniert. that one combines the diazo compound of 4-chloro-1 -3-toliiicline with dietetic acetic acid s'iure -o-tolidinide.
CH100620D 1921-12-13 1922-12-05 Process for the preparation of a water-insoluble azo dye. CH100620A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE100620X 1921-12-13
CH100186T 1922-12-05

Publications (1)

Publication Number Publication Date
CH100620A true CH100620A (en) 1923-08-01

Family

ID=25705721

Family Applications (1)

Application Number Title Priority Date Filing Date
CH100620D CH100620A (en) 1921-12-13 1922-12-05 Process for the preparation of a water-insoluble azo dye.

Country Status (1)

Country Link
CH (1) CH100620A (en)

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