CH232046A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH232046A
CH232046A CH232046DA CH232046A CH 232046 A CH232046 A CH 232046A CH 232046D A CH232046D A CH 232046DA CH 232046 A CH232046 A CH 232046A
Authority
CH
Switzerland
Prior art keywords
mol
preparation
dye
aminobenzene
sulfonic acid
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH232046A publication Critical patent/CH232046A/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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/02—Disazo dyes
    • C09B33/12—Disazo dyes in which the coupling component is a heterocyclic compound

Landscapes

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

Description

  

  Verfahren zur Herstellung eines     Disazofarbstoifes.       Gegenstand vorliegender Erfindung ist  ein Verfahren zur Herstellung eines     Disazo-          farbstoffes.    Das     Verfahren    ist dadurch ge-         kennzeichnet,        dass        man.    1     Mol    dianotierte     1-          Aminobenzol-2-sulfo@nsäure    mit 1     Mol    des       Diiminodipyrazo#ls    des     4,4'-Diamino-3,3'-,

  di-          methyldiphenyls    der folgenden Formel  
EMI0001.0015     
    kuppelt und anschliessend 1     Mol    des so     er-          haltenenMonoazofarbstoffes    mit 1     Mol        diazo@          tierter        1-Aminoben7,ol-2-carbonsäure-5-sulfon-          s@äure    vereinigt.  



  Der neue Farbstoff stellt ein gelbes Pul  ver -dar, das sich in     Wasser    mit gelber Farbe  löst und Wolle in :gelben Tönen färbt.         Beispiel;     1     Mol        1-Aminobenzol-2-sulfonsäure    wird  dianotiert und in     -saurer    Lösung mit 1     Mol     .des     DiiminodiTyrazols    des     4,4'-Diamino:-3,3'-          dimethyldiphenyls    der Formel  
EMI0001.0033     
      gekuppelt.

   Nach Beendigung der Kupplung  gibt     man    1     Mol        diazotierto        1-Aminobenzol-2-          carbonsäure-5-sulfonsäure    hinzu, lässt einige  Zeit rühren., macht     bicarbonatalkalisch    und  schliesslich     sodaa-lkalisch.    Nach Beendigung  der zweiten Kupplung macht man     essigsauer,     salzt aus und     saugt    den Farbstoff ab. Er  stellt ein gelbliches Pulver dar, das Wolle  gelb anfärbt. Durch Nachbehandlung der  Färbung mit Chrom oder Kupfersalzen wird    die Färbung tiefer. Die     Waschechtheit    und       Wa.lkechtheit    sind gut.



  Process for the preparation of a disazo dye. The present invention relates to a process for the preparation of a disazo dye. The method is characterized in that one. 1 mol of dianotated 1- aminobenzene-2-sulfonic acid with 1 mol of the diiminodipyrazo # ls of 4,4'-diamino-3,3'-,

  dimethyldiphenyls of the following formula
EMI0001.0015
    coupled and then 1 mol of the monoazo dye thus obtained is combined with 1 mol of diazo @ tated 1-aminobene7, ol-2-carboxylic acid-5-sulfonic acid.



  The new dye is a yellow powder that dissolves in water with a yellow color and dyes wool in yellow tones. Example; 1 mol of 1-aminobenzene-2-sulfonic acid is dianotized and in acidic solution with 1 mol .des DiiminodiTyrazole of 4,4'-diamino: -3,3'-dimethyldiphenyl of the formula
EMI0001.0033
      coupled.

   After the coupling is complete, 1 mol of diazotized 1-aminobenzene-2-carboxylic acid-5-sulfonic acid is added, the mixture is stirred for some time, made alkaline with bicarbonate and finally alkaline with soda. When the second coupling is complete, the mixture is made acidic, salted out and the dye is filtered off with suction. It is a yellowish powder that dyes wool yellow. After treating the color with chromium or copper salts, the color becomes deeper. The washfastness and washfastness are good.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man 1 Mol diazotierte 1-Aminobenzol-2-eulfonsäure mit 1 Mal des Diiminodipyrazals des 4,4'- Diamino-3, PATENT CLAIM: Process for the preparation of a disazo dye, characterized in that 1 mol of diazotized 1-aminobenzene-2-sulfonic acid is mixed with 1 time the diiminodipyrazal of 4,4'-diamino-3, 3'-dimethyldiphenyls der folgen den Formel EMI0002.0021 kuppelt und anschliessend 1 Mol des so erhal tenen Monoazofarbstoffes mit 1 Mol dia.zo- tierter 1-Aminobenzol-2-carbonsäure-5-sulfon- säure vereinigt. Der neue Farbstoff stellt ein gelbes Pul ver, dar, das sich in Wasser mit gelber Farbe löst und Wolle in gelben Tönen färbt. 3'-dimethyldiphenyls which follow the formula EMI0002.0021 coupled and then 1 mol of the monoazo dye obtained in this way is combined with 1 mol of dia.zo- tated 1-aminobenzene-2-carboxylic acid-5-sulfonic acid. The new dye is a yellow powder that dissolves in water with a yellow color and dyes wool in yellow tones.
CH232046D 1941-09-13 1942-08-19 Process for the preparation of a disazo dye. CH232046A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE232046X 1941-09-13
CH230074T 1942-08-19

Publications (1)

Publication Number Publication Date
CH232046A true CH232046A (en) 1944-04-30

Family

ID=25727438

Family Applications (1)

Application Number Title Priority Date Filing Date
CH232046D CH232046A (en) 1941-09-13 1942-08-19 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH232046A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197455A (en) * 1961-12-15 1965-07-27 Geigy Ag J R Disazo dyestuffs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197455A (en) * 1961-12-15 1965-07-27 Geigy Ag J R Disazo dyestuffs

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