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CH249548A - Process for the preparation of a polyazo dye. - Google Patents

Process for the preparation of a polyazo dye.

Info

Publication number
CH249548A
CH249548A CH249548DA CH249548A CH 249548 A CH249548 A CH 249548A CH 249548D A CH249548D A CH 249548DA CH 249548 A CH249548 A CH 249548A
Authority
CH
Switzerland
Prior art keywords
dye
mol
polyazo dye
preparation
brown
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 CH249548A publication Critical patent/CH249548A/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
    • C09B35/00Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/38Trisazo dyes ot the type
    • C09B35/40Trisazo dyes ot the type the component K being a dihydroxy or polyhydroxy compound

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum     Hauptpatsnt    Nr. 244602.    Verfahren zur Herstellung     eines        Polyazofarbstoffes.       Gegenstand vorliegenden Patentes     ist    ein  Verfahren zur Herstellung     eines        Polyazo-          farbstoffes.    Das Verfahren ist dadurch ge  kennzeichnet, dass man 1     Mol        tetrazotierten     4,

  4' -     Diamino    -     diphenylharnstoff    einerseits  mit 1     Mol    des     Monoazofarbstoffes        aus        diazo-          tierter        2-Amino-l-oxy-benzol-4-sulfonsäure     und     Resorcin    und anderseits mit     3-Methyl-5-          pyrazolon    kuppelt. Der entstandene neue       Trisazofarbstoff    stellt ein dunkles Pulver  dar, das sich in Wasser mit brauner und     in     konzentrierter Schwefelsäure mit orange  roter Farbe löst.

   Er färbt     Cellulosefasern    in  gelbbraunen Tönen, welche beim Behandeln  mit Kupferverbindungen die Nuance nur un  wesentlich ändern, in den Echtheitseigen  schaften jedoch erheblich     verbessert    werden.       Beispiel:

       24,2 Teile     4,4'-Diamino-diphenylharnstoff     werden in Gegenwart von 45 Teilen Salz  säure mit 13,8 Teilen     Natriumnitrit        tetra-          zotiert    und in schwach essigsaurer Suspen  sion mit einer wässerigen Lösung von 31,0  Teilen des     Monoazofarbstoffes        aus    diazotier-         ter        2-Amino-l-oxy-benzol-4-sulfonsäure        und          Resorcin    vereinigt.

   Sobald kein     Tetrazo-          diphenylharnstoff    mehr nachgewiesen wer  den kann, kuppelt man in Gegenwart von       Natriumbiearbonat    mit einer neutralen wässe  rigen Lösung von 9,8 Teilen     3-Methyl-5-pyr-          azolon.    Nach 12 Stunden wird filtriert und  getrocknet.



  <B> Additional patent </B> to main patent no. 244602. Process for the production of a polyazo dye. The present patent relates to a process for the production of a polyazo dye. The process is characterized in that 1 mol of tetrazotized 4,

  4 '- diamino - diphenylurea on the one hand with 1 mol of the monoazo dye from diazo - tated 2-amino-1-oxy-benzene-4-sulfonic acid and resorcinol and on the other hand with 3-methyl-5-pyrazolone. The resulting new trisazo dye is a dark powder that dissolves in water with a brown color and in concentrated sulfuric acid with an orange-red color.

   It dyes cellulose fibers in yellow-brown tones, which change the shade only un essential when treated with copper compounds, but the fastness properties are considerably improved. Example:

       24.2 parts of 4,4'-diaminodiphenylurea are tetrazotized with 13.8 parts of sodium nitrite in the presence of 45 parts of hydrochloric acid and diazotized in weakly acetic acid suspension with an aqueous solution of 31.0 parts of the monoazo dye 2-Amino-1-oxy-benzene-4-sulfonic acid and resorcinol combined.

   As soon as no more tetrazodiphenylurea can be detected, coupling is carried out in the presence of sodium carbonate with a neutral aqueous solution of 9.8 parts of 3-methyl-5-pyrazolone. After 12 hours, it is filtered and dried.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Poly- azofarbstoffes, dadurch gekennzeichnet, dass man 1 Mol tetrazotierten 4,4'-Diamino-di- phenylharnstoff einerseits mit 1 Mol des Monoazofarbstoffes aus dia.zotierter 2-Amino- 1-oxy-benzol-4-sulfonsäure und Resorcin und anderseits mit 3-Methyl-5-pyrazolon kuppelt. PATENT CLAIM: Process for the production of a polyazo dye, characterized in that 1 mol of tetrazotized 4,4'-diamino-diphenylurea is mixed with 1 mol of the monoazo dye from dia.zotierter 2-amino-1-oxy-benzene-4- sulfonic acid and resorcinol and on the other hand with 3-methyl-5-pyrazolone. Der entstandene neue Trisazofarbsto.ff stellt ein dunkles Pulver dar, das sich in Wasser mit brauner und in konzentrierter Schwefel säure mit orangeroter Farbe löst. Er färbt Cellulosefasern in gelbbraunen Tönen, welche beim Behandeln mit Kupferverbindungen die Nuance nur unwesentlich ändern, in den Echtheitseigenschaften jedoch erheblich ver bessert werden. The resulting new Trisazofarbsto.ff is a dark powder that dissolves in water with a brown color and in concentrated sulfuric acid with an orange-red color. It dyes cellulose fibers in yellow-brown tones, which change the shade only insignificantly when treated with copper compounds, but the fastness properties are considerably improved.
CH249548D 1945-05-16 1945-05-16 Process for the preparation of a polyazo dye. CH249548A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH244602T 1945-05-16
CH249548T 1945-05-16

Publications (1)

Publication Number Publication Date
CH249548A true CH249548A (en) 1947-06-30

Family

ID=25728954

Family Applications (1)

Application Number Title Priority Date Filing Date
CH249548D CH249548A (en) 1945-05-16 1945-05-16 Process for the preparation of a polyazo dye.

Country Status (1)

Country Link
CH (1) CH249548A (en)

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