CH150308A - 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
CH150308A
CH150308A CH150308DA CH150308A CH 150308 A CH150308 A CH 150308A CH 150308D A CH150308D A CH 150308DA CH 150308 A CH150308 A CH 150308A
Authority
CH
Switzerland
Prior art keywords
dye
acid
naphthylamine
dianotized
diazo compound
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 CH150308A publication Critical patent/CH150308A/en

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Description

  

  Verfahren zur Darstellung eines     substautiveai        PolyazofarbstofFes.       Es wurde gefunden, dass man zu einem  wertvollen Substantiven     Polyazofarbstoff    ge  langt, wenn man die     Diazoverbindung    von       2-Naphtylamin-4.8-disulfosäure    mit     a-Naph-          tylamin    kuppelt, den so erhaltenen Farbstoff  dianotiert, die     Diazoverbindung    mit     1-Naph-          tylamin-7-sulfosäure    kuppelt,

   den erhaltenen       Disazofarbstoff    abermals dianotiert und schliess  lich seine     Diazoverbindung    in alkalischer  Lösung mit dem     Monoazofarbstoff    vereinigt,  welcher durch Kupplung von dianotierter       Metanilsäure    mit     2.5-Aminonaphtol-7-mono-          sulfosäure    in saurer Lösung erhalten wird.

      überschüssiger Soda versetzte Lösung des  Farbstoffes eingetragen, welcher durch     saurf,     Kupplung von 17,3 Teilen dianotierter     Meta-          nilsäure    mit 24 Teilen     2.5-Aminonaphtol-7-          monosulfosäure    in saurer Lösung erhalten       wurde.    Nach beendeter     Kupplung    wird auf  geheizt und     ausgesalzen.     



  Der erhaltene     Farbstoff    ist ein     dunkel-          bronziges    Pulver, welches in Wasser mit  blauer, in konzentrierter Schwefelsäure mit  blauschwarzer Farbe löslich ist. Er färbt     auf     Baumwolle ein grünliches Blau von ausge  zeichneter Lichtechtheit.    <I>Beispiel:</I>  30,3 Teile     2-Aminönaphtalin-4.8-disulfo-          säure    werden dianotiert und in bekannter  Weise mit 15 Teilen     a-Naphtylamin    gekup  pelt. Der erhaltene Farbstoff wird weiter  dianotiert und mit 24,5 Teilen     1-naphtyl-          amin-7-sulfosaurem    Natron kombiniert.

   Man  isoliert den Farbstoff und dianotiert nochmals  weiter. Der     "#azokörper    wird in eine -mit



  Process for the preparation of a substautive polyazo dye. It has been found that a valuable noun polyazo dye is obtained if the diazo compound of 2-naphthylamine-4,8-disulfonic acid is coupled with a-naphthylamine, the dye thus obtained is dianotized and the diazo compound with 1-naphthylamine-7 -sulfonic acid couples,

   the disazo dye obtained is dianotized again and finally its diazo compound is combined in alkaline solution with the monoazo dye, which is obtained by coupling dianotated metanilic acid with 2,5-aminonaphthol-7-monosulfonic acid in acidic solution.

      Excess soda added solution of the dye, which was obtained by acidic coupling of 17.3 parts of dianotized metanilic acid with 24 parts of 2,5-aminonaphthol-7-monosulfonic acid in acidic solution. After the coupling is complete, the system is heated up and salted out.



  The dye obtained is a dark bronze powder which is soluble in water with a blue color and in concentrated sulfuric acid with a blue-black color. It dyes cotton a greenish blue with excellent lightfastness. <I> Example: </I> 30.3 parts of 2-aminonaphthalene-4,8-disulfonic acid are dianotized and coupled in a known manner with 15 parts of a-naphthylamine. The dye obtained is further dianotized and combined with 24.5 parts of 1-naphthylamine-7-sulfonic acid sodium.

   The dye is isolated and dianotized again. The "# azo body is in a -with

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines substan- t.iven Polyazofarbstoffes, dadurch gekennzeich net, dass man die Diazoverbindung von 2 Naphtylamin-4.8-disulfosäure mit a-Naphtyl- amin kuppelt, den so erhaltenen Farbstoff dianotiert, die Diazoverbindung mit 1-Naph- tylamin-7-sulfosäure kuppelt, PATENT CLAIM: A process for the preparation of a substantial polyazo dye, characterized in that the diazo compound of 2-naphthylamine-4,8-disulfonic acid is coupled with a-naphthylamine, the dye thus obtained is dianotized, the diazo compound with 1-naphthylamine -7-sulfonic acid couples, den erhaltenen Disazofarbstoff abermals dianotiert und schliess- lieh seine Diazoverbindung in alkalischer Lösung mit dem 1Monoazofarbstoff vereinigt, welcher durch Kupplung von diazotierter 112etanilsäure mit 2.5-Aminonaphtol-7-morro- sulfosäure in saurer Lösung erhalten wird. Der Farbstoff ist ein - dunkelbronziges Pulver, welches in Wasser rnit blauer, in konzentrierter Schwefelsäure -mit blauschwar zer Farbe löslich ist. Er färbt auf Baum wolle ein grünliches Blau von ausgezeich neter Lichtechtheit. the disazo dye obtained is dianotized again and finally its diazo compound is combined in alkaline solution with the monoazo dye, which is obtained by coupling diazotized 112etanilic acid with 2,5-aminonaphthol-7-morrosulfonic acid in acidic solution. The dye is a dark bronze powder which is soluble in water with a blue color and in concentrated sulfuric acid with a blue-black color. It dyes cotton a greenish blue with excellent lightfastness.
CH150308D 1929-11-29 1930-11-10 Process for the preparation of a substantive polyazo dye. CH150308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE150308X 1929-11-29

Publications (1)

Publication Number Publication Date
CH150308A true CH150308A (en) 1931-10-31

Family

ID=5673832

Family Applications (1)

Application Number Title Priority Date Filing Date
CH150308D CH150308A (en) 1929-11-29 1930-11-10 Process for the preparation of a substantive polyazo dye.

Country Status (1)

Country Link
CH (1) CH150308A (en)

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