CH222691A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH222691A
CH222691A CH222691DA CH222691A CH 222691 A CH222691 A CH 222691A CH 222691D A CH222691D A CH 222691DA CH 222691 A CH222691 A CH 222691A
Authority
CH
Switzerland
Prior art keywords
amino
red
acid
monoazo dye
preparation
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 CH222691A publication Critical patent/CH222691A/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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid

Landscapes

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

Description

  

      Verfahren    zur     Darstellung    eines     Monoazofarbstoffes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung eines       Monoazofarbstoffes,    welches dadurch gekenn  zeichnet ist, dass     diazotierte        2-Amino-4-acetyl-          amino-4'-        methyl-diphenylsulfon-3'-sulfonsäure     in saurem Medium mit     2-Amino-8-oxynaph-          thalin-6-sulfonsäure    gekuppelt wird.  



  Der neue     Farbstoff,    ein violettes Pulver,  welches sich in Wasser mit roter, in konzen  trierter Schwefelsäure mit braunroter Farbe  löst, liefert auf Wolle aus saurem Bade gleich  mässige     gelbstichig    rote Färbungen, die sich  durch sehr gute Lichtechtheit auszeichnen.

           Beispiel:     38,4 Teile     2-Amino-4-acetylamino-4'-me-          thyl-diphenylsulfon-3'-sulfonsäure    werden nach  bekannten Methoden indirekt     diazotiert.    Die       Diazoniumverbindung    gibt man zu     einerkongo-          sauren    Suspension von 24 Teilen     2-Amino-8-          oxynaphthalin-6-sulfonsäure    und stumpft dar  auf die     11lineralsäure    in üblicher Weise bis  zur schwach kongosauren Reaktion ab. Die    Kupplung ist     in    kurzer Zeit beendet.

   Man  erhält einen     Farbstoff,    der nach dem Filtrieren  und Trocknen ein violettes Pulver bildet, das  sich in Wasser mit roter, in konzentrierter  Schwefelsäure mit braunroter Farbe löst und  auf Wolle aus saurem Bade gleichmässige       gelbstichig    rote Färbungen     liefert,    die sich  durch sehr gute Lichtechtheit auszeichnen.



      Process for the preparation of a monoazo dye. The subject of the present additional patent is a process for the production of a monoazo dye, which is characterized in that diazotized 2-amino-4-acetyl-amino-4'-methyl-diphenylsulfone-3'-sulfonic acid in an acidic medium with 2-amino 8-oxynaphthalene-6-sulfonic acid is coupled.



  The new dye, a violet powder, which dissolves in water with red, in concentrated sulfuric acid with a brownish-red color, delivers evenly yellowish red dyeings on wool from an acid bath, which are characterized by very good lightfastness.

           Example: 38.4 parts of 2-amino-4-acetylamino-4'-methyl-diphenylsulphone-3'-sulphonic acid are diazotized indirectly by known methods. The diazonium compound is added to a Congo acidic suspension of 24 parts of 2-amino-8-oxynaphthalene-6-sulfonic acid and blunted to the mineral acid in the usual way until a weak Congo acidic reaction occurs. The coupling is completed in a short time.

   A dye is obtained which, after filtering and drying, forms a violet powder which dissolves in water with red, in concentrated sulfuric acid with a brownish-red color and on wool from an acid bath gives uniform yellow-tinged red colorations which are characterized by very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Monoazo- farbstoffes, welches dadurch gekennzeichnet ist, dass diazotierte 2-Amino-4-acetylamino- 4'-methyl-diphenylsulfon-3'-sulfonsäure in sau rem Medium mit 2-Amino-8-oxynaphthalin-6- sulfonsäure gekuppelt wird. Der neue Farbstoff, ein violettes Pulver, welches sich in Wasser mit roter, in konzen trierter Schwefelsäure mit braunroter Farbe löst, liefert auf Wolle aus saurem Bade gleichmässige gelbstichig rote Färbungen, die sich durch sehr gute Lichtechtheit auszeichnen. PATENT CLAIM: Process for the production of a monoazo dye, which is characterized in that diazotized 2-amino-4-acetylamino-4'-methyl-diphenylsulfone-3'-sulfonic acid in acidic medium with 2-amino-8-oxynaphthalene-6 - sulfonic acid is coupled. The new dye, a purple powder, which dissolves in water with red, in concentrated sulfuric acid with a brownish-red color, provides uniform yellowish red dyeings on wool from an acid bath, which are characterized by very good lightfastness.
CH222691D 1940-04-26 1940-04-26 Process for the preparation of a monoazo dye. CH222691A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH222691T 1940-04-26
CH219931T 1940-04-26

Publications (1)

Publication Number Publication Date
CH222691A true CH222691A (en) 1942-07-31

Family

ID=25726363

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222691D CH222691A (en) 1940-04-26 1940-04-26 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH222691A (en)

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