CH186739A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH186739A
CH186739A CH186739DA CH186739A CH 186739 A CH186739 A CH 186739A CH 186739D A CH186739D A CH 186739DA CH 186739 A CH186739 A CH 186739A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
dye
amino
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 CH186739A publication Critical patent/CH186739A/en

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Description

  

  Verfahren zur Herstellung eines     Azofarbstof%s.       Es wurde gefunden, dass man wertvolle       Azofarbstoffe    erhält, wenn man die     Diazo-          verbindungen    von Aminen der allgemeinen  Formel  
EMI0001.0005     
    worin X einen     Substituenten,    insbesondere  einen nichtsaurere     Substituenten,    wie     Alkyl,          Aryl,        Aralkyl,        Alkoxy,        Aralkoxy    oder     Aryl-          oxy    bedeutet und R für     Alkyl,        Aryl,

          Ar-          alkyl,        Alkoxy,        Aralkoxy        ,Aryloxy    oder die       Aminogruppe    steht, deren Wasserstoffatome  ganz oder teilweise durch gleiche oder ver  schiedene     Alkyl-,        Aryl-    oder     Aralkylreste     substituiert sein können, mit     2-Aminonaph-          thalinsulfonsäuren    oder ihren     Substitutions-          produkten    in saurem     Medium    vereinigt.  



  Die so erhältlichen Farbstoffe haben ein       gutes        Egalisierungsvermögen    und färben    Wolle im     allgemeinen    in blauen Tönen von  guter     Walkechtheit.    Die Färbungen können  sich ausserdem durch eine gute Abendfarbe       auszeichnen.     



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines     Azo-          farbstoffes.    Es ist dadurch gekennzeichnet.  dass man das     diazotierte        5-Nitro-2-amino-l-          methoxybenzol-3-suHäthylanilid    mit 2     Me-          thylamino    - 8 -     oxynaphthalin    - 6 -     sulfosäure    in  saurem Medium kuppelt.

      <I>Beispiel:</I>    351     Gewichtsteile        5-Nitro-2-amino-l-me-          thoxybenzol-3-sulfäthylanilid    werden mit 69  Gewichtsteilen     Natriumnitrit        und    Salzsäure       diazotiert    und essigsauer mit 253 Gewichts  teilen     2-Methylamino-8-oxynaphthalin-6-sul-          fosäure    gekuppelt. Der isolierte Farbstoff  färbt Wolle aus saurem Bade in klaren, sehr       grünsticlhig    blauen Tönen von ausgezeichne  ter Abendfarbe.



  Process for the preparation of an azo dye% s. It has been found that valuable azo dyes are obtained if the diazo compounds of amines of the general formula are used
EMI0001.0005
    wherein X is a substituent, in particular a non-acidic substituent, such as alkyl, aryl, aralkyl, alkoxy, aralkoxy or aryloxy and R is alkyl, aryl

          Aralkyl, alkoxy, aralkoxy, aryloxy or the amino group, the hydrogen atoms of which can be completely or partially substituted by identical or different alkyl, aryl or aralkyl radicals, combined with 2-aminonaphthalene sulfonic acids or their substitution products in an acidic medium .



  The dyes obtainable in this way have good leveling properties and generally dye wool in blue shades of good millfastness. The colors can also be characterized by a good evening color.



  The present patent relates to a process for the production of an azo dye. It is characterized by it. that the diazotized 5-nitro-2-amino-1-methoxybenzene-3-suHäthylanilid with 2 methylamino-8-oxynaphthalene-6-sulfonic acid is coupled in an acidic medium.

      <I> Example: </I> 351 parts by weight of 5-nitro-2-amino-1-methoxybenzene-3-sulfethylanilide are diazotized with 69 parts by weight of sodium nitrite and hydrochloric acid and acetic acid with 253 parts by weight of 2-methylamino-8-oxynaphthalene 6-sulphonic acid coupled. The isolated dye dyes wool from an acid bath in clear, very greenish blue tones of an excellent evening color.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstelhmg eines Azofarb- stoffes, dadurch gekennzeichnet, dass man das diazotierte 5-Nitro-2-amino-l-methogy- benzol-3-sulfäthylanilid mit 2-Methylamino- S-ogynaphthalin-6-sulfonsäure in saurem Me dium kuppelt. Der isolierte Farbstoff färbt Wolle aus saurem Bade in klaren, sehr grünstichig blauen Tönen von ausgezeichneter Abend farbe. PATENT CLAIM: A process for the production of an azo dye, characterized in that the diazotized 5-nitro-2-amino-1-methogybenzene-3-sulfethylanilide is mixed with 2-methylamino-S-ogynaphthalene-6-sulfonic acid in acidic medium clutch. The isolated dye dyes wool from an acid bath in clear, very greenish blue shades of excellent evening color.
CH186739D 1934-02-24 1935-01-31 Process for the preparation of an azo dye. CH186739A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE186739X 1934-02-24
CH182049T 1935-01-31

Publications (1)

Publication Number Publication Date
CH186739A true CH186739A (en) 1936-09-30

Family

ID=25720652

Family Applications (1)

Application Number Title Priority Date Filing Date
CH186739D CH186739A (en) 1934-02-24 1935-01-31 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH186739A (en)

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