CH244254A - Process for the production of a direct dye. - Google Patents

Process for the production of a direct dye.

Info

Publication number
CH244254A
CH244254A CH244254DA CH244254A CH 244254 A CH244254 A CH 244254A CH 244254D A CH244254D A CH 244254DA CH 244254 A CH244254 A CH 244254A
Authority
CH
Switzerland
Prior art keywords
production
mol
direct dye
yellow
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R 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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH244254A publication Critical patent/CH244254A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B43/00Preparation of azo dyes from other azo compounds
    • C09B43/12Preparation of azo dyes from other azo compounds by acylation of amino groups
    • C09B43/136Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents
    • C09B43/16Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents linking amino-azo or cyanuric acid residues

Landscapes

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

Description

  

  Verfahren zur Herstellung eines     Direktfarbstoffes.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung eines Direktfarb  stoffes. Das Verfahren ist dadurch gekenn  zeichnet, dass man das Kondensationsprodukt  aus 1     Mol        4,4'-Diamino-stilben-2,2'-disulfon-          säure    und 2     Mol        Cyanurhalogenid    mit 2     Mol          4-Amino-g-ogy-1,1"-        azobenzol        -3(-earbonsäure     und 2     Mol    Anilin umsetzt.  



  Der so erhaltene     Disazofarbstoff    ist ein  gelbbraunes Pulver, das sich in Wasser mit  gelber Farbe löst und     Cellulo,sefasern    in grün  stichig     gelben,    Tönen färbt.  



  Durch Nachbehandlung der Färbung mit  Normaldehyd oder Chromsalzen werden die  Wasch- und     MVasserechtheit        beträchtlich    ver  bessert, besonders eine     Behandlung    der Fär  bungen mit Chromsalzen ergibt, bei sehr  geringer     Trübung    der Nuance, vorzügliche:  Wasser-     und        Waschechtheiten.     



  <I>Beispiel:</I>  37 Teile     Cyanurchlorid    werden mit 37       Teilen        4,4'-Diamino-stilben-2,2'-disulfonsäure     kondensiert.     Das        diprimäre    Kondensations-         produkt    wird mit der neutralen Lösung von  51,4 Teilen     4-A.mino-4'-oxy-1,1'-azobenzol-3'-          carbonsäure    bis 40-42      weiterkondensiert,     wobei die Reaktion durch Zugabe von     Soda     neutral gehalten wird.

   Durch Kondensation  des so erhaltenen     disekundären    Produktes mit  25,8 Teilen     Anilinchlorhydrat    und 60 Teilen  kristallisiertem     Natriumacetat    wird der Farb  stoff hergestellt und durch Ausfällen mit  Kochsalz isoliert.



  Process for the production of a direct dye. The present patent is a process for the production of a direct color material. The process is characterized in that the condensation product of 1 mole of 4,4'-diamino-stilbene-2,2'-disulfonic acid and 2 moles of cyanuric halide with 2 moles of 4-amino-g-ogy-1,1 " - Reacts azobenzene -3 (carboxylic acid and 2 moles of aniline.



  The disazo dye obtained in this way is a yellow-brown powder which dissolves in water with a yellow color and dyes cellulose fibers in green, pale yellow shades.



  Post-treatment of the dyeing with normal dehyde or chromium salts considerably improves the fastness to washing and water, especially a treatment of the dyeings with chromium salts gives excellent: water and washing fastnesses with very little cloudiness of the shade.



  <I> Example: </I> 37 parts of cyanuric chloride are condensed with 37 parts of 4,4'-diamino-stilbene-2,2'-disulfonic acid. The diprimary condensation product is further condensed with the neutral solution of 51.4 parts of 4-A.mino-4'-oxy-1,1'-azobenzene-3'-carboxylic acid to 40-42, the reaction being caused by the addition of soda is kept neutral.

   The dye is produced by condensation of the disecondary product thus obtained with 25.8 parts of aniline chlorohydrate and 60 parts of crystallized sodium acetate and isolated by precipitation with common salt.

 

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines Direkt farbstoffes, dadurch gekennzeichnet, dass man das Kondensationsprodukt aus 1 Mol 4,4"-Diamino-stilben-2,2'-disulfonsäurs und 2 Mol Cyanurhalogenid mit 2 Mol 4-Amino- 4'-oxy-1,1"-azobenzol-3'-carbonsäure und 2 Mol Anilin umsetzt. Der so erhaltene Disazofarbstoff ist ein gelbbraunes Pulver, PATENT CLAIM Process for the preparation of a direct dye, characterized in that the condensation product of 1 mol of 4,4 "-diamino-stilbene-2,2'-disulfonic acid and 2 mol of cyanuric halide with 2 mol of 4-amino-4'-oxy-1 , 1 "-azobenzene-3'-carboxylic acid and 2 moles of aniline. The disazo dye thus obtained is a yellow-brown powder, das sich in Wasser mit gelber Farbe löst und Cellulosefasern in grün- stichig gelben Tönen färbt. which dissolves in water with a yellow color and dyes cellulose fibers in greenish yellow tones.
CH244254D 1943-09-01 1943-09-01 Process for the production of a direct dye. CH244254A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH244254T 1943-09-01
CH239758T 1945-11-15

Publications (1)

Publication Number Publication Date
CH244254A true CH244254A (en) 1946-08-31

Family

ID=25728422

Family Applications (1)

Application Number Title Priority Date Filing Date
CH244254D CH244254A (en) 1943-09-01 1943-09-01 Process for the production of a direct dye.

Country Status (1)

Country Link
CH (1) CH244254A (en)

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