CH182281A - Process for the preparation of a bluish red monoazo dye. - Google Patents

Process for the preparation of a bluish red monoazo dye.

Info

Publication number
CH182281A
CH182281A CH182281DA CH182281A CH 182281 A CH182281 A CH 182281A CH 182281D A CH182281D A CH 182281DA CH 182281 A CH182281 A CH 182281A
Authority
CH
Switzerland
Prior art keywords
preparation
bluish red
monoazo dye
red monoazo
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
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 Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH182281A publication Critical patent/CH182281A/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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid

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

Description

  

      Zusatznatent    zum     Hauptpatent    Nr. 178820.    Verfahren zur Darstellung eines     blaiistiehig    roten     Nonoazofarbstoifes.       Es wurde gefunden, dass man zu einem  blaustichig roten     Monoazofarbstoff    von sehr  guten Echtheitseigenschaften gelangt, wenn  man     Orthanilsäure-diphenylamid        diazotiert     und mit     2-Amino-8-oxynaphtaIin-6-sulfo-          säure    sauer vereinigt.  



  <I>Beispiel:</I>  32 Teile     Orthanilsäurediphenylamid    wer  den in     Eisessiglösung    mit 6,9 Teilen Na  triumnitrit und     2'5    Teilen     30%iger        Salzsäure          diazotiert.    Die     Diazolösung    lässt man in eine  essigsaure Lösung von 24 Teilen     2-Amino-8-          oxynaphtalin    - 6 -     sulfosäure    einlaufen und  stumpft die überschüssige Mineralsäure mit       Natriumacetat    ab. Der Farbstoff wird mit  Kochsalz vollständig abgeschieden, filtriert,  mit verdünnter Salzlösung gewaschen und    getrocknet.

   Er stellt ein rotbraunes Pulver  dar, das Wolle in     klarem,    blaustichig rotem  Ton anfärbt. Die Färbung ist sehr gut     licht-          und        walkecht    und zeigt gute Egalität.



      Additional patent to main patent No. 178820. Process for the preparation of a blue-like red nonoazo dye. It has been found that a bluish red monoazo dye with very good fastness properties is obtained if orthanilic acid diphenylamide is diazotized and combined acidic with 2-amino-8-oxynaphthalen-6-sulfonic acid.



  <I> Example: </I> 32 parts of orthanilic acid diphenylamide are diazotized in glacial acetic acid solution with 6.9 parts of sodium nitrite and 2.5 parts of 30% hydrochloric acid. The diazo solution is allowed to run into an acetic acid solution of 24 parts of 2-amino-8-oxynaphthalene-6-sulfonic acid and the excess mineral acid is blunted with sodium acetate. The dye is completely separated off with common salt, filtered, washed with dilute brine and dried.

   It is a red-brown powder that dyes wool in a clear, bluish red shade. The dyeing is very lightfast and washfast and shows good levelness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines blausti chig roten Monoazofarbstoffes, dadurch ge kennzeichnet, dass man Orthanilsäure- diphenylamid diazotiert und mit 2li-Amino-8- oxynaphtalin.-6-sulfosäure sauer vereinigt. Der neue Farbstoff stellt ein rotbraunes Pulver dar, das Wolle in klarem, blaustichig rotem Ton anfärbt. Die Färbung ist sehr gut licht- und walkecht und zeigt gute Ega lität. Claim: Process for the preparation of a bluish red monoazo dye, characterized in that orthanilic acid diphenylamide is diazotized and combined acidic with 2li-amino-8-oxynaphthalene-6-sulfonic acid. The new dye is a red-brown powder that dyes wool in a clear, bluish red shade. The coloration is very lightfast and washfast and shows good evenness.
CH182281D 1934-11-21 1934-11-21 Process for the preparation of a bluish red monoazo dye. CH182281A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH178820T 1934-11-21
CH182281T 1934-11-21

Publications (1)

Publication Number Publication Date
CH182281A true CH182281A (en) 1936-01-31

Family

ID=25720214

Family Applications (1)

Application Number Title Priority Date Filing Date
CH182281D CH182281A (en) 1934-11-21 1934-11-21 Process for the preparation of a bluish red monoazo dye.

Country Status (1)

Country Link
CH (1) CH182281A (en)

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