CH201837A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH201837A
CH201837A CH201837DA CH201837A CH 201837 A CH201837 A CH 201837A CH 201837D A CH201837D A CH 201837DA CH 201837 A CH201837 A CH 201837A
Authority
CH
Switzerland
Prior art keywords
preparation
disazo dye
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 CH201837A publication Critical patent/CH201837A/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)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Description

  

      Zusatzpatent    zum     Hauptpatent    Nr. 198710.    Verfahren     zur    Herstellung eines     Bisazofarbstoffes.       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 Ei  genschaften,     wenn    man     4'-Amino-2.3'-di-          methyl-azo-benzol        diazotiert        und    die     Diazo-          verbindung    mit     p-Isohexylphenol    kuppelt.  



  <I>Beispiel:</I>  Man     diazotiert    in üblicher Weise 22.,5  Teile     4'-Amino-2.        3'-dimethyl-azo-benzol    nach  Zugabe von 60 Teilen Salzsäure 12'     B6    mit  6,9 Teilen     Natriumnitrit,    filtriert die     Diazo-          lösung    und lässt sie bei 0<B>'</B>zu einer wässerigen       Lösung    von 17,8     Teilen        p-Isohexylphenol       und 10 Teilen     Natriumhydroxyd,    der man       zweckmässig    ein     Emulgiermittel    zusetzt,

       ein-          laufen.    Nach     Beendigung    der     Kupplung     heizt man auf etwa 60   hoch,     nutscht    bei  Zimmertemperatur ab, wäscht aus und trock  net. Der Farbstoff löst sich in organischen       Lösungsmitteln    mit     einem    bräunlichen  Orange.



      Additional patent to main patent No. 198710. Process for the production of a bisazo 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 been further found, a dye with very similar properties is obtained if 4'-amino-2,3'-dimethyl-azo-benzene is diazotized and the diazo compound is coupled with p-isohexylphenol.



  <I> Example: </I> 22.5 parts of 4'-amino-2 are diazotized in the usual way. 3'-dimethyl-azo-benzene, after adding 60 parts of hydrochloric acid 12 'B6 with 6.9 parts of sodium nitrite, the diazo solution is filtered and leaves it at 0 to give an aqueous solution of 17.8 Parts of p-isohexylphenol and 10 parts of sodium hydroxide, to which an emulsifier is expediently added,

       come in. After the coupling is complete, the temperature is raised to about 60, suction filtered at room temperature, washed out and dried. The dye dissolves in organic solvents with a brownish orange.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man 4'-Amino-2. 3'-dimethyl-azo-benzol diazotiert und die Diazoverbindung mit p-Isohegyl- phenol kuppelt. Der Farbstoff löst sich in organischen Lösungsmitteln mit einem bräun lichen Orange. PATENT CLAIM: Process for the production of a disazo dye, characterized in that 4'-amino-2. 3'-dimethyl-azo-benzene is diazotized and the diazo compound is coupled with p-isohegylphenol. The dye dissolves in organic solvents with a brownish orange.
CH201837D 1936-03-31 1937-01-22 Process for the preparation of a disazo dye. CH201837A (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE201848X 1936-03-31
DE201844X 1936-03-31
DE201849X 1936-03-31
DE201847X 1936-03-31
DE201846X 1936-03-31
DE201845X 1936-03-31
DE201837X 1936-03-31
CH198710T 1937-01-22

Publications (1)

Publication Number Publication Date
CH201837A true CH201837A (en) 1938-12-15

Family

ID=27570403

Family Applications (1)

Application Number Title Priority Date Filing Date
CH201837D CH201837A (en) 1936-03-31 1937-01-22 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH201837A (en)

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