CH201842A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH201842A
CH201842A CH201842DA CH201842A CH 201842 A CH201842 A CH 201842A CH 201842D A CH201842D A CH 201842DA CH 201842 A CH201842 A CH 201842A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
disazo dye
parts
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 CH201842A publication Critical patent/CH201842A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/06—Disazo dyes from a coupling component "C" containing a directive hydroxyl group

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines     Disazofarbstoffes.       Nach dem im Hauptpatent beschriebenen  Verfahren erhält man einen     Disazofarbstoff,     der sich in     organischen    Lösungsmitteln mit  bräunlich gelber Farbe löst, wenn man     p-          Aminoazobenzol        diazotiert    und die     Diazover-          bindung    mit     p-Isohexylphenol    kuppelt.  



  Wie nun weiter gefunden wurde, erhält  man einen Farbstoff mit ganz ähnlichen  Eigenschaften, wenn man den     Monoazofarb-          stoff,    erhalten durch     Kupplung    von     diazo-          tiertem    Anilin mit     a-Naphthylamin,    weiter       diazotiert    und die     Diazoverbindung    mit     p-          Isohexylphenol    kuppelt.  



  <I>Beispiel:</I>  Man     diazotiert    24,7     Teile    des     Monoazo-          farbstoffes,    erhalten durch Kupplung von     di-          azotiertem    Anilin mit     a-Naphthylamin,    unter  Zugabe von 50     Teilen    Salzsäure, 12       Be,     in bekannter Weise mit 6,9 Teilen Natrium  nitrit,     filtriert    die     Diazolösung    und lässt sie  bei 0   zu einer Auflösung von 17,8 Teilen         p-Isohexylphenol    in 250     Teilen    Natronlauge,

    enthaltend 5 Teile     Natriumhydroxyd    und  etwa 8     Teile    eines     Emulgiermittels,    ein  laufen. Während des Zulaufes der     Diazo-          lösung    gibt man allmählich noch 20 Teile       einer    10 %     igen    Natronlauge     hinzu.    Nach be  endeter Kupplung wird der Farbstoff wie  üblich fertiggestellt. Er löst sich in organi  schen Lösungsmitteln mit bräunlich oranger  Farbe.



  Process for the preparation of a disazo dye. The process described in the main patent gives a disazo dye which dissolves in organic solvents with a brownish yellow color when p-aminoazobenzene is diazotized and the diazo compound is coupled with p-isohexylphenol.



  As has now also been found, a dye with very similar properties is obtained if the monoazo dye, obtained by coupling diazoated aniline with a-naphthylamine, is further diazotized and the diazo compound is coupled with p-isohexylphenol.



  <I> Example: </I> 24.7 parts of the monoazo dye, obtained by coupling diazoated aniline with α-naphthylamine, with addition of 50 parts of hydrochloric acid, 12 Be, are diazotized in a known manner with 6.9 Parts of sodium nitrite, filtered the diazo solution and leaves it at 0 to dissolve 17.8 parts of p-isohexylphenol in 250 parts of sodium hydroxide solution,

    containing 5 parts of sodium hydroxide and about 8 parts of an emulsifier, a run. While the diazo solution is being fed in, 20 parts of a 10% sodium hydroxide solution are gradually added. After coupling has ended, the dye is completed as usual. It dissolves in organic solvents with a brownish orange color.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man den Monoazofarbstoff, erhalten durch Kupp lung von diazotiertem Anilin mit a-Naph- thylamin, weiter diazotiert und die Diazover- bindung mit p-Isohexylphenol kuppelt. Der Farbstoff färbt organische Lösungsmittel mit bräunlich oranger Farbe. PATENT CLAIM: Process for the production of a disazo dye, characterized in that the monoazo dye, obtained by coupling diazotized aniline with a-naphthylamine, is further diazotized and the diazo compound is coupled with p-isohexylphenol. The dye stains organic solvents with a brownish orange color.
CH201842D 1936-03-31 1937-01-22 Process for the preparation of a disazo dye. CH201842A (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE201844X 1936-03-31
DE201848X 1936-03-31
DE201847X 1936-03-31
DE201845X 1936-03-31
DE201842X 1936-03-31
DE201846X 1936-03-31
DE201849X 1936-03-31
CH198710T 1937-01-22

Publications (1)

Publication Number Publication Date
CH201842A true CH201842A (en) 1938-12-15

Family

ID=27570408

Family Applications (1)

Application Number Title Priority Date Filing Date
CH201842D CH201842A (en) 1936-03-31 1937-01-22 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH201842A (en)

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