CH153706A - Process for the preparation of a substantive polyazo dye. - Google Patents

Process for the preparation of a substantive polyazo dye.

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Publication number
CH153706A
CH153706A CH153706DA CH153706A CH 153706 A CH153706 A CH 153706A CH 153706D A CH153706D A CH 153706DA CH 153706 A CH153706 A CH 153706A
Authority
CH
Switzerland
Prior art keywords
dye
acid
diazo compound
preparation
blue
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH153706A publication Critical patent/CH153706A/en

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Description

  

      Yerfalwen    zur Darstellung eines     substantiven        Polyazofarbstoffes.       Es wurde gefunden, dass man zu einem  wertvollen     substantiven        Polyazofarbstoff    ge  langt:

  , wenn man die     Diazoverbindung    von  1-     Aminobenzol-3    .     6-disulfosäure    mit     a-Naph-          tylamin    kuppelt, den so erhaltenen     Farbstoff     dianotiert, die     Diazoverbindung    mit     1-Amino-          2-naphtolmetliyläther-6-sulfo-säure    kuppelt,

    den erhaltenen     Disazofarbstoff    abermals di  anotiert und schliesslich seine     Diazoverbin-          dung    in alkalischer Lösung unter Zusatz von       Pyridin    mit dem     bZonoazofarbstoff    vereinigt,  welcher durch Kupplung von     diazatierter          Metanilsäure    mit 2.     5-Aminonaphtol-7-mono-          sulfosäure    in saurer Lösung erhalten wird.

         Beispiel:     25,3 Teile     1-Aminobenzol-3.6-disulfo-          säure    werden dianotiert und in bekannter  Weise mit 15 Teilen     a-Naphtylamin    gekup  pelt. Der erhaltene Farbstoff     wird    weiter  dianotiert und mit     2,5,3    Teilen     1-Amino-2-          riaphtolmethyläther-6-sulfosäure    kombiniert.  'Man isoliert den Farbstoff und dianotiert    nochmals weiter.

   Der isolierte     Diazokörper     wird in eine     mit        Pyridin    versetzte     ainmo-          iiiakalische    Lösung des Farbstoffes ein  getragen, welcher durch saure Kupplung von  <B>17,3</B> Teilen dianotierter     Metanilsäure    mit 24  Teilen     2.5-Aminonaphtol-7-monosulfosäure     in saurer Lösung erhalten wurde. Nach be  endeter Kupplung wird isoliert und ge  trocknet.  



  Der erhaltene Farbstoff ist ein     dunkel-          bronziges    Pulver, welches in Wasser mit  blaugrüner, in konzentrierter Schwefelsäure  mit blauer Farbe löslich ist. Er färbt auf  Baumwolle ein Blaugrün von ausgezeichneter  Lichtechtheit.



      Yerfalwen for the preparation of a substantive polyazo dye. It has been found that a valuable substantive polyazo dye is obtained:

  , if you use the diazo compound of 1-aminobenzene-3. 6-disulfonic acid is coupled with α-naphthylamine, the dye thus obtained is dianotized, the diazo compound is coupled with 1-amino-2-naphtholmetliyl ether-6-sulfonic acid,

    the disazo dye obtained is again di-anotized and finally its diazo compound is combined in alkaline solution with the addition of pyridine with the b-zonoazo dye, which is obtained by coupling diazated metanilic acid with 2- 5-aminonaphthol-7-monosulfonic acid in acidic solution.

         Example: 25.3 parts of 1-aminobenzene-3,6-disulphonic acid are dianotized and kup pelt in a known manner with 15 parts of a-naphthylamine. The dye obtained is further dianotized and combined with 2.5.3 parts of 1-amino-2-riaphtholmethyl ether-6-sulfonic acid. The dye is isolated and dianotized again.

   The isolated diazo body is introduced into an amino alkaline solution of the dye to which pyridine has been added, which is obtained by acidic coupling of 17.3 parts of dianotated metanilic acid with 24 parts of 2,5-aminonaphthol-7-monosulfonic acid in acidic solution has been. After the coupling has ended, it is isolated and dried.



  The dye obtained is a dark bronze powder which is soluble in water with a blue-green color and in concentrated sulfuric acid with a blue color. It dyes cotton a blue-green with excellent lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines substan- tiven Polyazofarbstoffes, dadurch gekenn zeichnet, dass man die Diazoverbindung von 1-Aminobenzol-3. 6-disulfosäure mit a-Napli- lylamin kuppelt, den so erhaltenen Farb stoff dianotiert, die Diazov erbindung mit 1-Amino - f - naphtolmethyläther- 6 - sulfosäure kuppelt, PATENT CLAIM: Process for the preparation of a substantial polyazo dye, characterized in that the diazo compound of 1-aminobenzene-3. 6-disulphonic acid is coupled with a-naplilylamine, the resulting dye is dianotized, the diazo compound is coupled with 1-amino - f - naphtholmethyl ether - 6 - sulphonic acid, den erhaltenen Disazofarbstoff abermals diazotiert und schliesslich seine Di- azoverbindung in alkalischer Lösung unter Zusatz von Pyridin mit dem Monoazofarb- stoff vereinigt, -welcher durch Kupplung von diazotierter Metanilsäure mit 2.5-Amino- naphl,ol-7-monosulfosäure in saurer Lösung erhalten wird. the disazo dye obtained is again diazotized and finally its diazo compound is combined in alkaline solution with the addition of pyridine with the monoazo dye, which is obtained by coupling diazotized metanilic acid with 2,5-amino-naphl, ol-7-monosulfonic acid in acidic solution. Der Farbstoff ist ein dunkelbronzibes Pulver, welches in Wasser mit blaugrüner. in konzentrierter Schwefelsäure mit blauer Farbe löslich ist. Er färbt auf Baumwolle ein Blaugrün von ausgezeichneter Lichtecht heit. The dye is a dark bronze powder, which in water turns blue-green. is soluble in concentrated sulfuric acid with a blue color. It dyes cotton a blue-green with excellent lightfastness.
CH153706D 1929-11-29 1930-11-10 Process for the preparation of a substantive polyazo dye. CH153706A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE153706X 1929-11-29
CH150308T 1930-11-10

Publications (1)

Publication Number Publication Date
CH153706A true CH153706A (en) 1932-03-31

Family

ID=25715628

Family Applications (1)

Application Number Title Priority Date Filing Date
CH153706D CH153706A (en) 1929-11-29 1930-11-10 Process for the preparation of a substantive polyazo dye.

Country Status (1)

Country Link
CH (1) CH153706A (en)

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