CH302398A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH302398A
CH302398A CH302398DA CH302398A CH 302398 A CH302398 A CH 302398A CH 302398D A CH302398D A CH 302398DA CH 302398 A CH302398 A CH 302398A
Authority
CH
Switzerland
Prior art keywords
phosgene
preparation
disazo dye
dyes
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH302398A publication Critical patent/CH302398A/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
    • C09B43/00—Preparation of azo dyes from other azo compounds
    • C09B43/12—Preparation of azo dyes from other azo compounds by acylation of amino groups
    • C09B43/136—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents
    • C09B43/14—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents with phosgene or thiophosgene

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 298139.    Verfahren     zur        Herstellung    eines     Disazofarbsto$es.       Es wurde gefunden,     dass    man zu einem wertvollen     Disazofarbstoff        gelangt,    wenn man  die     Aminomonoazofarbstoffe    der Formel  
EMI0001.0009     
    mittels     Phosgen    zum     Harnstoffderivat    ver  einigt.  



  Der neue Farbstoff bildet ein braunes Pul  ver, das sieh in Wasser mit oranger Farbe löst  und Baumwolle und regenerierte     Cellulose    in  sehr reinen gelben Tönen anfärbt. Nach dem  ein- oder     zweibadigen        Nachkupferungsverfah-          ren    erhält man gelbe Töne von sehr guter     Nass-          and        Liehteehtheit.     



  Die Vereinigung der beiden     Aminomono-          azofarbstoffe    zum asymmetrischen Harn  stoffderivat mittels     Phosgen        erfolgt    zweck  mässig in wässerigem, schwach alkalischem,  z. B.     alkalicarbonatalkalischem    Medium bei  leicht erhöhter Temperatur in Gegenwart  einer Puffersubstanz, wie beispielsweise Na-         triumacetat.    Der für die     Reaktion    günstige       pH-Wert    liegt zwischen 9,5 und 5,5.  



  <I>Beispiel:</I>  49 Teile 4'-     (4"-Amino)    -benzoylamino-2'       chlor-4-oxy-1,1'-azobenzol-3-carbonsäure-5-sul-          fonsäure    und 33,7 Teile     4'-Amino-4-oxy-1,1'-          azobenzol-3-carbonsäiire-2'-sulfonsäure    werden  in üblicher Weise zusammen mit     Phosgen    zu  einem asymmetrischen Harnstoff vereinigt.  



  Der vollständig abgeschiedene Farbstoff  wird filtriert und getrocknet.



      Patent amendment to main patent no. 298139. Process for the production of a disazo dye. It has been found that a valuable disazo dye is obtained by using the amino monoazo dyes of the formula
EMI0001.0009
    united by means of phosgene to form the urea derivative.



  The new dye forms a brown powder that dissolves in water with an orange color and dyes cotton and regenerated cellulose in very pure yellow tones. The one or two bath re-coppering process produces yellow tones with very good wet and light resistance.



  The combination of the two amino monoazo dyes to the asymmetric urea substance derivative by means of phosgene is conveniently carried out in an aqueous, weakly alkaline, z. B. alkaline carbonate alkaline medium at a slightly elevated temperature in the presence of a buffer substance such as sodium acetate. The pH value favorable for the reaction is between 9.5 and 5.5.



  <I> Example: </I> 49 parts of 4'- (4 "-amino) -benzoylamino-2 'chloro-4-oxy-1,1'-azobenzene-3-carboxylic acid-5-sulphonic acid and 33, 7 parts of 4'-amino-4-oxy-1,1'-azobenzene-3-carboxylic acid-2'-sulfonic acid are combined in the usual way together with phosgene to form an asymmetric urea.



  The completely deposited dye is filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man die Aminomonoazofarbstoffe der Formeln EMI0002.0001 mittels Phosgen zum Harnstoffderivat ver einigt. Claim: Process for the preparation of a disazo dye, characterized in that the aminomonoazo dyes of the formulas EMI0002.0001 united by means of phosgene to form the urea derivative. Der neue Farbstoff bildet ein braunes Pul ver, das sich in Wasser mit oranger Farbe löst und Baumwolle und regenerierte Cellnlose in sehr reinen gelben Tönen anfärbt. Naeh dem ein- oder zweibadigen Nachkupferungsverfah- ren erhält man gelbe Töne von sehr guter Nass- und Lichtechtheit. The new dye forms a brown powder that dissolves in water with an orange color and dyes cotton and regenerated cellulose in very pure yellow tones. The one- or two-bath re-coppering process results in yellow shades of very good wet and light fastness. UNTERANSPRUCH: Verfahren gemäss Patentanspruch, da durch gekennzeiehnet, dass man die Behand lung mit Phosgen in wässerigem Medium bei einem PH-Wert durehführt, der zwisehen. <B>9,5</B> und 5,5 liegt. SUBCLAIM: Process according to patent claim, as characterized by the fact that the treatment with phosgene is carried out in an aqueous medium at a pH value that is between. <B> 9.5 </B> and 5.5.
CH302398D 1949-11-08 1952-04-08 Process for the preparation of a disazo dye. CH302398A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB303049X 1949-11-08
GB2774869X 1949-11-08
CH302398T 1952-04-08

Publications (1)

Publication Number Publication Date
CH302398A true CH302398A (en) 1954-10-15

Family

ID=27178275

Family Applications (1)

Application Number Title Priority Date Filing Date
CH302398D CH302398A (en) 1949-11-08 1952-04-08 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH302398A (en)

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