CH170926A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH170926A
CH170926A CH170926DA CH170926A CH 170926 A CH170926 A CH 170926A CH 170926D A CH170926D A CH 170926DA CH 170926 A CH170926 A CH 170926A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
blue
dinitro
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 CH170926A publication Critical patent/CH170926A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Nach dem im Hauptpatent beschriebenen  Verfahren erhält man einen blauen Acetat  seidenfarbstoff, wenn man dianotiertes     6-Broin-          2.4-dinitro-l-aminoberizol    mit     1-Aininonaph-          thalin    kuppelt.  



  Wie nun weiter gefunden wurde, erhält  man einen     Farbstoff    mit ganz ähnlichen  Eigenschaften, wenn man     6-Broin-2.4-dinitro-          1-aminobenzol    dianotiert und mit     1-'Methyl-          3-oxyäthylbutylaminobenzol    kuppelt.  



  <I>Beispiel</I>  29 Teile     6-Brom-2.4-dinitro-l-aminobenzol     werden dianotiert, indem man die Verbindung  bei einer Temperatur vor) etwa<B>55</B>   in eine  mit 6,9 Teilen     Natriumnitrit    und 120 Teilen  konzentrierter Schwefelsäure bereitete     Nitro-          syIschwefelsäure    einrührt. Durch     Digerieren     in der mehrfachen Menge Eis wird eine sehr  leicht kuppelnde     Diazolösung    erhalten, die    man nach dem Filtrieren in eine schwach  mineralsaure Lösung von 20,7 Teilen     1-Me-          thyl-3-oxyäthyl-butylaminoberizol    einlaufen  lässt. Die Kupplung vollzieht sich rasch, auch  ohne Zusatz eines säurebindenden Mittels.

    Der fertige Farbstoff erzeugt auf     Acetatseide     ein Blauviolett von vorzüglicher Lichtechtheit.



  Process for the preparation of an azo dye. According to the process described in the main patent, a blue acetate silk dye is obtained when dianotated 6-broin-2,4-dinitro-1-aminoberizole is coupled with 1-ainonaphthalene.



  As has now been further found, a dye with very similar properties is obtained if 6-broin-2,4-dinitro-1-aminobenzene is dianotized and coupled with 1-methyl-3-oxyethylbutylaminobenzene.



  <I> Example </I> 29 parts of 6-bromo-2,4-dinitro-1-aminobenzene are dianotized by adding the compound at a temperature of about 55 to 6.9 parts of sodium nitrite and 120 parts of concentrated sulfuric acid is stirred in nitro-sysulfuric acid. Digestion in a multiple amount of ice gives a very easily coupling diazo solution which, after filtering, is allowed to run into a weakly mineral acidic solution of 20.7 parts of 1-methyl-3-oxyethyl-butylaminoberizole. The coupling takes place quickly, even without the addition of an acid-binding agent.

    The finished dye produces a blue-violet of excellent lightfastness on acetate silk.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Acetat seide in blauvioletten Tönen anfärbenden Farbstoffes, dadurch gekennzeichnet, dass man 6-Brorn-2.4-dinitro-l-aminobenzol dianotiert und die Diazoverbindung mit 1-Methyl-3- oxyäthyl-butylaminobenzol kuppelt. Der fer tige Farbstoff erzeugt auf Acetatseide ein Blauviolett von vorzüglicher Lichtechtbeit. PATENT CLAIM: Process for the preparation of a dye which dyes acetate silk in blue-violet tones, characterized in that 6-bromine-2,4-dinitro-1-aminobenzene is dianotized and the diazo compound is coupled with 1-methyl-3-oxyethyl-butylaminobenzene. The finished dye produces a blue-violet of excellent lightfastness on acetate silk.
CH170926D 1932-07-08 1933-04-27 Process for the preparation of an azo dye. CH170926A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE170926X 1932-07-08
CH168144T 1933-04-27

Publications (1)

Publication Number Publication Date
CH170926A true CH170926A (en) 1934-07-31

Family

ID=25718526

Family Applications (1)

Application Number Title Priority Date Filing Date
CH170926D CH170926A (en) 1932-07-08 1933-04-27 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH170926A (en)

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