CH249554A - Process for the preparation of a polyazo dye. - Google Patents

Process for the preparation of a polyazo dye.

Info

Publication number
CH249554A
CH249554A CH249554DA CH249554A CH 249554 A CH249554 A CH 249554A CH 249554D A CH249554D A CH 249554DA CH 249554 A CH249554 A CH 249554A
Authority
CH
Switzerland
Prior art keywords
mol
dye
preparation
brown
polyazo 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 CH249554A publication Critical patent/CH249554A/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

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent 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        tetrazotiertes          4,4'-Diamino    - 3,

  3'-     dimethyl    -     diphenyl    einer  seits mit 1     Mol    des     Monoazofarbstoffes    aus       diazotierter        2-Amino-l-ogy-benzol-4-sulfon-          säur6    und     Resorcin    und anderseits mit 1     Mol          3-Methyl-5-pyrazolon    kuppelt. Der entstan  dene neue     Trisazofarbstoff    stellt ein dunkles  Pulver dar, das sich in Wasser mit brauner  und in     konzentrierter    Schwefelsäure mit  roter Farbe löst.

   Er färbt Fasern aus natür  licher und regenerierter     Cellulose    in braunen  Tönen, die beim Behandeln mit Kupfersalzen  in der Nuance nur wenig verändert, in den  Echtheitseigenschaften jedoch erheblich ver  bessert werden.  



  <I>Beispiel:</I>  21,2 Teile 4,4' -     Diamino    - 3,3' -     dimethyl-          diphenyl    werden in bekannter Weise mit  13,8 Teilen     Natriumnitrit        tetrazotiert    und in  Gegenwart von 15 Teilen     Natriumacetat    mit  einer     lackmussauren        wässrigen    Lösung von  31 Teilen des     Monoazofarbstoffes,    erhalten  durch Kuppeln von     diazotierter        2-Amino-l-          oxy-benzol-4-sulfonsäure    mit     Resorcin,    ver-    einigt.

   Durch     Zutropfen    von verdünnter       Sodalösung    wird die Suspension schwach       lackmussauer    gehalten. Sobald kein     Tetrazo-          dimethyl-diphenyl    mehr nachweisbar     ist,     kuppelt man in Gegenwart von Natrium  carbonat mit 9,8 Teilen     3-Methyl-5-pyr-          azolon.    Der fertig     gebildete        Trisazofarbstoff     wird     abfiltriert    und     zetrocknet.  



  <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 - 3,

  3'-dimethyl - diphenyl on the one hand with 1 mol of the monoazo dye from diazotized 2-amino-l-ogy-benzene-4-sulfonic acid6 and resorcinol and on the other hand with 1 mol of 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 a red color.

   It dyes fibers made of natural and regenerated cellulose in brown tones, the shade of which changes only slightly when treated with copper salts, but the fastness properties are considerably improved.



  <I> Example: </I> 21.2 parts of 4,4'-diamino-3,3'-dimethyldiphenyl are tetrazotized in a known manner with 13.8 parts of sodium nitrite and, in the presence of 15 parts of sodium acetate, with an aqueous lacquer acid Solution of 31 parts of the monoazo dye, obtained by coupling diazotized 2-amino-oxy-benzene-4-sulfonic acid with resorcinol, combined.

   The suspension is kept slightly walled by the addition of dilute soda solution. As soon as tetrazodimethyl-diphenyl is no longer detectable, coupling is carried out in the presence of sodium carbonate with 9.8 parts of 3-methyl-5-pyrazolone. The completely formed trisazo dye is filtered off and dried.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Poly- azofarbstoffes, dadurch gekennzeichnet, dass man 1 Mol tetrazotiertes 4,4'-Diamino-3,3'- dimethyl-diphenyl einerseits mit 1 Mol des Monoazofarbstoffes aus diazotierter 2-Amino- 1-ogy-benzol-4-sulfonsäure und Resorcin und anderseits mit 1 Mol 3-Methyl-5-pyrazolon kuppelt. Claim: A process for the production of a polyazo dye, characterized in that 1 mol of tetrazotized 4,4'-diamino-3,3'-dimethyl-diphenyl is mixed with 1 mol of the monoazo dye from diazotized 2-amino-1-ogy-benzene -4-sulfonic acid and resorcinol and on the other hand with 1 mol of 3-methyl-5-pyrazolone couples. Der entstandene neue Trisazofarb- stoff stellt ein dunkles Pulver dar, das sich in Wasser mit brauner und in konzentrierter Schwefelsäure mit roter Farbe löst. Er färbt Fasern aus natürlicher und regenerierter Cel- Lulose in braunen Tönen, die beim Behandeln mit Kupfersalzen in der Nuance nur wenig verändert, in den Echtheitseigenschaften iedoch erheblich verbessert werden. The resulting new trisazo dye is a dark powder that dissolves in water with a brown color and in concentrated sulfuric acid with a red color. It dyes fibers made from natural and regenerated cellulose in brown tones, which are only slightly changed in shade when treated with copper salts, but are considerably improved in terms of their fastness properties.
CH249554D 1945-05-16 1945-05-16 Process for the preparation of a polyazo dye. CH249554A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH244602T 1945-05-16
CH249554T 1945-05-16

Publications (1)

Publication Number Publication Date
CH249554A true CH249554A (en) 1947-06-30

Family

ID=25728960

Family Applications (1)

Application Number Title Priority Date Filing Date
CH249554D CH249554A (en) 1945-05-16 1945-05-16 Process for the preparation of a polyazo dye.

Country Status (1)

Country Link
CH (1) CH249554A (en)

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