CH160948A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH160948A
CH160948A CH160948DA CH160948A CH 160948 A CH160948 A CH 160948A CH 160948D A CH160948D A CH 160948DA CH 160948 A CH160948 A CH 160948A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
mol
aminobenzoic acid
diazotized
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 CH160948A publication Critical patent/CH160948A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Es wurde gefunden,     dass    man zu einem  wertvollen     substantiven        Azofarbstoff    gelangt,  wenn man<B>1</B>     Mol        diazotierte        4-Sulfo-2-amino-          benzoesäure,   <B>1</B>     Mol        diazotierte        2-Aminobenzoe-          säure,    und<B>1</B>     Mol        Di-acetoaoetyl-o-tolidin    auf  einander einwirken     lässt.     



  <I>Beispiel:</I>  <B>190</B> Gewichtsteile     Di-acetoacetyl-o-tolidin     werden mit<B>23</B> Gewichtsteilen     Ätznatron    und  Wasser unter Zusatz     von    soviel     Natrium-          acetat    gelöst,     dass    die folgende Kupplung  bis zum     Schluss    schwach essigsauer verlaufen       muss.    Dann     lässt    man unter Rühren eine       Diazoldsung    aus<B>108,5</B> Gewichtsteilen     4-Sulfo-          2-amitiobenzoesäure    zufliessen.

   Wenn die Kup  plung beendet ist, setzt man überschüssige  Soda zu und     lässt    eine     Diazolösung    aus<B>68,5</B>  Gewichtsteilen     2-Aminobenzoesäure    zufliessen.  Den fertig gebildeten Farbstoff isoliert man  auf die übliche Weise.    Behandelt man die Ausfärbung des so  dargestellten Farbstoffes auf der Faser mit  kupferabgebenden Mitteln, so erhält man ein       grünstichiges    Gelb von ausgezeichneter     Licht-          und    Waschechtheit.



  Process for the preparation of an azo dye. It has been found that a valuable substantive azo dye is obtained if <B> 1 </B> mol of diazotized 4-sulfo-2-aminobenzoic acid, <B> 1 </B> mol of diazotized 2-aminobenzoic acid , and <B> 1 </B> mol of di-acetoaoetyl-o-tolidine can act on one another.



  <I> Example: </I> <B> 190 </B> parts by weight of di-acetoacetyl-o-tolidine are dissolved with <B> 23 </B> parts by weight of caustic soda and water with the addition of enough sodium acetate that the The following coupling must be slightly acidic until the end. A diazoldsung composed of 108.5 parts by weight of 4-sulfo-2-amitiobenzoic acid is then allowed to flow in while stirring.

   When the coupling has ended, excess soda is added and a diazo solution composed of 68.5 parts by weight of 2-aminobenzoic acid is allowed to flow in. The fully formed dye is isolated in the usual way. If the coloring of the dyestuff thus represented on the fiber is treated with a copper-releasing agent, a greenish yellow of excellent lightfastness and washfastness is obtained.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man <B>1</B> Mol diazotierte 4-Sulfo-2-aminobenzoesäure, PATENT CLAIM: Process for the preparation of an azo dye, characterized in that <B> 1 </B> mol of diazotized 4-sulfo-2-aminobenzoic acid, <B>1</B> Mol diazotierte 2-Aminobenzoesäure und <B>1</B> Mol Di-acetoaoetyl-o-tolidin aufeinander ein wirken lässt. Der neue Farbstoff liefert Dach Behand lung seiner Ausfärbungen auf Baumwolle mit kupferabgebenden Mitteln ein grünstichiges Gelb von ausgezeichneter Licht- und Wasch echtheit. <B> 1 </B> mol of diazotized 2-aminobenzoic acid and <B> 1 </B> mol of di-acetoaoetyl-o-tolidine act on one another. The new dye provides a greenish yellow with excellent lightfastness and washfastness for its dyeings on cotton with copper-releasing agents.
CH160948D 1931-01-03 1931-12-28 Process for the preparation of an azo dye. CH160948A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE160948X 1931-01-03
CH157947T 1931-12-28

Publications (1)

Publication Number Publication Date
CH160948A true CH160948A (en) 1933-03-31

Family

ID=25717021

Family Applications (1)

Application Number Title Priority Date Filing Date
CH160948D CH160948A (en) 1931-01-03 1931-12-28 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH160948A (en)

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