CH222696A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH222696A
CH222696A CH222696DA CH222696A CH 222696 A CH222696 A CH 222696A CH 222696D A CH222696D A CH 222696DA CH 222696 A CH222696 A CH 222696A
Authority
CH
Switzerland
Prior art keywords
red
blue
acid
preparation
amino
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 CH222696A publication Critical patent/CH222696A/en

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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

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

Description

  

      Verfahren    zur Darstellung eines     3Tonoazofarbstoffes.       Gegenstand des vorliegenden Zusatz  patentes ist ein Verfahren zur Herstellung  eines     Monoazofarbstoffes,    welches dadurch  gekennzeichnet ist, dass     diazotierte        2-Amino-          5-benzoylamino-4'-        methyl-diphenylsulfan    - 8'  sulfonsäure in saurem Medium mit     2-Amino-          8    -     oxynaphthalin    - 6 -     sulfonsäure    gekuppelt  wird.  



  Der neue Farbstoff, ein dunkelblaurotes  Pulver, welches sich in Wasser mit blauroter,  in     konz.    Schwefelsäure mit     trübroter    Farbe  löst, liefert auf Wolle aus saurem Bade  gleichmässige blaurote Färbungen, die sich  durch sehr gute Lichtechtheit auszeichnen.

    <I>Beispiel:</I>  43,2 Teile     2-Amino-5-benzoylamino-4'-          methyl-diphenylsulfon-3'-sulfonsäure    werden  nach bekannten Methoden indirekt     diazotiert.     Die     Diazoniumverbindung    gibt man zu einer  kongosauren Suspension von 24 Teilen     2-          Amino    - 8 -     oxynaphthalin    - 6 -     sulfonsäure    und  stumpft darauf die Mineralsäure in üblicher  Weise bis zur schwach kongosauren Reak-         tion    ab. Die Kupplung ist in kurzer Zeit  beendet.

   Man erhält einen Farbstoff, der  nach dem Filtrieren und Trocknen ein dun  kelblaurotes Pulver bildet, das sich in Was  ser mit blauroter, in     konz.    Schwefelsäure mit       trübroter    Farbe löst und auf Wolle aus sau  rem Bade gleichmässige blaurote     Färbungen     liefert, die sich durch sehr gute Lichtechtheit  auszeichnen.



      Process for the preparation of a 3-toneazo 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-5-benzoylamino-4'-methyl-diphenylsulfane - 8 'sulfonic acid in an acidic medium with 2-amino- 8 - oxynaphthalene - 6 - sulfonic acid is coupled.



  The new dye, a dark blue-red powder, which in water with blue-red, in conc. Sulfuric acid dissolves with a cloudy red color, provides even blue-red colorations on wool from an acid bath, which are characterized by very good lightfastness.

    <I> Example: </I> 43.2 parts of 2-amino-5-benzoylamino-4'-methyl-diphenylsulphone-3'-sulphonic acid are diazotized indirectly by known methods. The diazonium compound is added to a Congo acid suspension of 24 parts of 2-amino-8-oxynaphthalene-6-sulfonic acid, and the mineral acid is then blunted in the usual way until it reacts weakly in the Congo acid. The coupling is completed in a short time.

   A dye is obtained which, after filtering and drying, forms a dark blue-red powder, which is in what water with blue-red, in conc. Sulfuric acid dissolves with a cloudy red color and provides uniform blue-red colorations on wool from acidic baths, which are characterized by very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Mono- azofarbstoffes, dadurch gekennzeichnet, dass diazotierte 2-Amino-5-benzoylamino-4'-me- thyl-diphenylsulfon-3'-sulfonsäure in saurem Medium mit 2-Amino-8-oxynaphthalin-6-sul- fonsäure gekuppelt wird. PATENT CLAIM: Process for the preparation of a monoazo dye, characterized in that diazotized 2-amino-5-benzoylamino-4'-methyl-diphenylsulfone-3'-sulfonic acid in acidic medium with 2-amino-8-oxynaphthalene-6- sulphonic acid is coupled. Der neue Farbstoff, ein dunkelblaurotes Pulver, das sich in Wasser mit blauroter, in konz. Schwefelsäure mit trübroter Farbe löst, liefert auf Wolle aus saurem Bade gleichmässige blaurote Färbungen, die sich durch sehr gute Lichtechtheit auszeichnen. The new dye, a dark blue-red powder, which in water with blue-red, in conc. Sulfuric acid dissolves with a cloudy red color, provides even blue-red colorations on wool from an acid bath, which are characterized by very good lightfastness.
CH222696D 1940-04-26 1940-04-26 Process for the preparation of a monoazo dye. CH222696A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH222696T 1940-04-26
CH219931T 1940-04-26

Publications (1)

Publication Number Publication Date
CH222696A true CH222696A (en) 1942-07-31

Family

ID=25726368

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222696D CH222696A (en) 1940-04-26 1940-04-26 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH222696A (en)

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