CH153704A - 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
CH153704A
CH153704A CH153704DA CH153704A CH 153704 A CH153704 A CH 153704A CH 153704D A CH153704D A CH 153704DA CH 153704 A CH153704 A CH 153704A
Authority
CH
Switzerland
Prior art keywords
dye
acid
blue
diazo compound
preparation
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 CH153704A publication Critical patent/CH153704A/en

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Description

  

  Verfahren zur     Darstellung    eines     substantiven        Polyazofarbstotfes.       Es wurde gefunden, dass man zu einem  wertvollen     substantiven        Polyazofarbstoff    ge  langt, wenn man die     Diazoverbindung    von       Metanilsäure    mit     1-Naphtylamin-7-sulfosäure     kuppelt, den so erhaltenen Farbstoff     diazo-          tiert,    die     Diazoverbindung    mit     1-Amino-2-          naphtolmethyläther-6-sulfosäure    kuppelt,

   den  erhaltenen     Disazofarbstoff    abermals     diazo-          tiert    und schliesslich seine     Diazoverbindung     in alkalischer Lösung unter Zusatz von     Py-          ridin    mit dem     Monoazofarbstoff    vereinigt,  welcher durch Kupplung von     diazotierter          Metanilsäure    mit<B>9-.</B>     5-Aminonaphtol-7-mo@no-          sulfosäure    in saurer Lösung erhalten wird.

    <I>Beispiel:</I>  17,3 Teile     Metanilsäure    werden     diazotiert     und in bekannter Weise mit 24,5 Teilen       1-naphtylamin-7-sulfosaurem    Natron gekup  pelt. Der erhaltene     Farbstoff        wird    weiter       diazotiert    und mit 25,3 Teilen     1-Amino-2-          naphtolmethyläther-6-.sulfosäure        kombiniert.          Man    isoliert den     Farbstoff    und     diazotiert       nochmals weiter.

   Der isolierte     Diazokörper     wird in eine mit     Pyridin    versetzte     ammonia-          kalische    Lösung des Farbstoffes eingetragen,  welcher durch saure Kupplung von 17,3 Tei  len     diazotierter        Metanilsäure    mit 24 Tei  len     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.



  Method for the production of a substantive polyazo dye. It has been found that a valuable substantive polyazo dye is obtained if the diazo compound of metanilic acid is coupled with 1-naphthylamine-7-sulfonic acid, the dye thus obtained is diazo-tated and the diazo compound with 1-amino-2-naphthol methyl ether-6 -sulfonic acid couples,

   the disazo dye obtained is diazotized again and finally its diazo compound is combined in an alkaline solution with the addition of pyridine with the monoazo dye, which is obtained by coupling diazotized metanilic acid with 5-aminonaphthol-7-mo @ nosulfonic acid is obtained in acidic solution.

    <I> Example: </I> 17.3 parts of metanilic acid are diazotized and coupled in a known manner with 24.5 parts of 1-naphthylamine-7-sulphonic acid sodium. The dye obtained is further diazotized and combined with 25.3 parts of 1-amino-2-naphtholmethylether-6-sulfonic acid. The dye is isolated and diazotized again.

   The isolated diazo body is introduced into an ammoniacal solution of the dye mixed with pyridine, which was obtained by acidic coupling of 17.3 parts of diazotized metanilic acid with 24 parts of 2,5-aminonaphthol-7-monosulphonic acid in acidic solution. 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 Metanilsäure mit 1-Naphtylamin-7-sulfosäu-e kuppelt, den so erhaltenen Farbstoff diazo- tiert, die Diazoverbindung mit 1-Amino-2- naphtolmethyläther-6-sulfosäurekuppelt, PATENT CLAIM: Process for the preparation of a substantial polyazo dye, characterized in that the diazo compound of metanilic acid is coupled with 1-naphthylamine-7-sulfo acid, the dye thus obtained is diazo- tated, the diazo compound with 1-amino-2- naphthol methyl ether-6-sulfonic acid coupled, den erhaltenen Disazofarbstoff abermals diazo- tiert und schliesslich seine Diazoverbindung in alkalischer Lösung unter Zusatz von Py- ridin mit dem Monoazofarbstoff vereinigt, welcher durch Kupplung von diazotierter Metanilsäure mit 2 . 5 - Aminonaphthol-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 - Aminonaphthol-7-monosulfonic acid is obtained in acidic solution. Der Farbstoff ist ein dunkelbronziges 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 is soluble in water with a blue-green color, in concentrated sulfuric acid with a blue color. It dyes cotton a blue-green with excellent lightfastness.
CH153704D 1929-11-29 1930-11-10 Process for the preparation of a substantive polyazo dye. CH153704A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE153704X 1929-11-29
CH150308T 1930-11-10

Publications (1)

Publication Number Publication Date
CH153704A true CH153704A (en) 1932-03-31

Family

ID=25715626

Family Applications (1)

Application Number Title Priority Date Filing Date
CH153704D CH153704A (en) 1929-11-29 1930-11-10 Process for the preparation of a substantive polyazo dye.

Country Status (1)

Country Link
CH (1) CH153704A (en)

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