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CH201841A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH201841A
CH201841A CH201841DA CH201841A CH 201841 A CH201841 A CH 201841A CH 201841D A CH201841D A CH 201841DA CH 201841 A CH201841 A CH 201841A
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 CH201841A publication Critical patent/CH201841A/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     Aminohydrochinondime-          thyläther,    weiter     diazotiert    und die     Diazo-          verbindung    mit     p-Isohexylphenol    kuppelt.

         Beispiel:     Man     diazotiert    25,7 Teile des     Monoazo-          farbstoffes,    der erhalten wird durch Kupp  lung von     diazotiertem    Anilin mit     Amino-          hydrochinondimethy        läther,    unter Zugabe von  60 Teilen Salzsäure, 12'     B6,    in bekannter  Weise mit 6,9 Teilen     Natriumnitrit,    filtriert  die     Diazolösung    und lässt sie bei 0   zu einer    Auflösung von 17,8     Teilen        p-Isohexylphenol     in 250 Teilen Natronlauge,

   enthaltend 6 Teile       Natriumhydroxyd    und     etwa    8 Teile eines       Emulgiermittels,        einlaufen.    Während des Zu  laufes der     Diazolösung    gibt man allmählich  noch 40 Teile einer 10%igen Natronlauge  hinzu. Nach     Beendigung    der Kupplung wird  der Farbstoff wie üblich     fertiggestellt.    Er  färbt organische Lösungsmittel lichtecht rot  braun.



  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 aminohydroquinone dimethyl ether, is further diazotized and the diazo compound is coupled with p-isohexylphenol.

         Example: 25.7 parts of the monoazo dye obtained by coupling diazotized aniline with amino hydroquinone dimethyl ether, with addition of 60 parts of hydrochloric acid, 12 'B6, are filtered in a known manner with 6.9 parts of sodium nitrite the diazo solution and leaves it at 0 to dissolve 17.8 parts of p-isohexylphenol in 250 parts of sodium hydroxide solution,

   containing 6 parts of sodium hydroxide and about 8 parts of an emulsifying agent. While the diazo solution is being added, 40 parts of a 10% sodium hydroxide solution are gradually added. After the coupling has ended, the dye is completed as usual. It colors organic solvents lightfast red-brown.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man den Monoazofarbstoff, erhalten durch Kupp lung von diazotiertem Anilin mit Amino- hydrochinondimethyläther, weiter diazotiert und die Diazoverbindung mit p-Isohexyl- phenol kuppelt. Der Farbstoff färbt orga nische Lösungsmittel lichtecht rotbraun an. PATENT CLAIM: Process for the preparation of a disazo dye, characterized in that the monoazo dye, obtained by coupling diazotized aniline with amino hydroquinone dimethyl ether, is further diazotized and the diazo compound is coupled with p-isohexyl phenol. The dye stains organic solvents lightfast red-brown.
CH201841D 1936-03-31 1937-01-22 Process for the preparation of a disazo dye. CH201841A (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE201841X 1936-03-31
DE201849X 1936-03-31
DE201848X 1936-03-31
DE201846X 1936-03-31
DE201847X 1936-03-31
DE201845X 1936-03-31
DE201844X 1936-03-31
CH198710T 1937-01-22

Publications (1)

Publication Number Publication Date
CH201841A true CH201841A (en) 1938-12-15

Family

ID=27570407

Family Applications (1)

Application Number Title Priority Date Filing Date
CH201841D CH201841A (en) 1936-03-31 1937-01-22 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH201841A (en)

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