CH201840A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH201840A
CH201840A CH201840DA CH201840A CH 201840 A CH201840 A CH 201840A CH 201840D A CH201840D A CH 201840DA CH 201840 A CH201840 A CH 201840A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
diazotized
disazo dye
parts
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 CH201840A publication Critical patent/CH201840A/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

  

      Zusatzpatent    zum Hauptpatent Nr. 198710.    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-Isohegylphenol    kuppelt.  



  Wie     nun    weiter gefunden wurde, erhält  man einen Farbstoff mit ganz ähnlichen  Eigenschaften, wenn man den     Monoazofarb-          stoff,    der erhalten wird durch     Kupplung     eines     diazotierten    technischen Gemisches von  X     ylidin    mit     ä-Amino-4-methogy-l-methyl-          benzol,    weiter     diazotiert        und    die     Diazover-          bindung    mit     p-Isohegylphenol    kuppelt.  



  <I>Beispiel:</I>  Man     diazotiert    26,9 Teile des     Monoazo-          farbstoffes,    der erhalten wird durch Kupp  lung eines     diazotierten        technischen    Gemisches  von     Xylidin    mit     3-Amino-4-methogy-l-me-          thylbenzol,    unter Zugabe von 60 Teilen     Salz-          säure,    12       B6,    in bekannter Weise     mit    6,9  Teilen     Natriumnitrit,

      filtriert die     Diazo-          lösung    und     lässt    sie bei 0   zu     einer    Auf-         lösung    von 17,8 Teilen     p-Isohegylphenol    in  250 Teilen Natronlauge, enthaltend 6 Teile       Natriumhydrogyd        und        etwa    3 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  gelbbraun an.



      Additional patent to main patent no. 198710. Process for the production 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-isohegylphenol.



  As has now also been found, a dye with very similar properties is obtained if the monoazo dye, which is obtained by coupling a diazotized technical mixture of xylidine with α-amino-4-methogy-1-methylbenzene, is continued diazotized and the diazo compound couples with p-isohegylphenol.



  <I> Example: </I> 26.9 parts of the monoazo dye, which is obtained by coupling a diazotized technical-grade mixture of xylidine with 3-amino-4-methogy-1-methylbenzene, are diazotized with the addition of 60 parts of hydrochloric acid, 12 B6, in a known manner with 6.9 parts of sodium nitrite,

      The diazo solution is filtered and allowed to run in at 0 to a solution of 17.8 parts of p-isohegylphenol in 250 parts of sodium hydroxide solution containing 6 parts of sodium hydrogen and about 3 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 stains organic solvents lightfast yellow-brown.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man den Monoazofarbstoff, der erhalten wird durch Kupplung eines diazotierten tech nischen Gemisches von Xylidin mit 3-Amino- 4-methogy-l-methylbenzol, weiter diazotiert und die Diazoverbindung mit p-Isohegyl- phenol kuppelt. Claim: Process for the preparation of a disazo dye, characterized in that the monoazo dye, which is obtained by coupling a diazotized technical mixture of xylidine with 3-amino-4-methogy-1-methylbenzene, is further diazotized and the diazo compound with p -Isohegyl- phenol couples. Der Farbstoff färbt orga nische Lösungsmittel lichtecht gelbbraun an. The dye stains organic solvents lightfast yellow-brown.
CH201840D 1936-03-31 1937-01-22 Process for the preparation of a disazo dye. CH201840A (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
DE201846X 1936-03-31
DE201849X 1936-03-31
DE201840X 1936-03-31
CH198710T 1937-01-22

Publications (1)

Publication Number Publication Date
CH201840A true CH201840A (en) 1938-12-15

Family

ID=27570406

Family Applications (1)

Application Number Title Priority Date Filing Date
CH201840D CH201840A (en) 1936-03-31 1937-01-22 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH201840A (en)

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