CH183863A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH183863A
CH183863A CH183863DA CH183863A CH 183863 A CH183863 A CH 183863A CH 183863D A CH183863D A CH 183863DA CH 183863 A CH183863 A CH 183863A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
aminobenzene
methyl
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 CH183863A publication Critical patent/CH183863A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Gemäss dem im Hauptpatent beschriebe  nen Verfahren erhält man     einen    für die       Acetatseidenfärberei    geeigneten Farbstoff  von sehr guter Lichtechtheit, wenn man die  aus     4-Nitro-2-chlor-l-aminobenzol    bereitete       Diazoverbindung    mit     1-Methyl-3-(diogy-          äthyl)-aminobenzol    kuppelt.  



  Wie nun weiter gefunden wurde, erhält  man einen ebenfalls für die     Acetatseiden-          färberei    sehr wertvollen Farbstoff, wenn  man     diazotiertes    2.     6-Dichlor-l-a.mino-4-          nitrobenzol    mit     1-Methy        l-3-di-(ss-ogyäthyl)-          aminobenzol    kuppelt.  



  <I>Beispiel:</I>  Eine aus 20,7 Teilen     2.6-Dichlor-l-          amino-4-nitrobenzol    auf dem üblichen Wege  dargestellte     Diazolösung    lässt man in eine  kalte Lösung von 19,5 Teilen     1-Methyl-3-          di-(ss-ogyäthyl)-aminobenzol    in 20 Teilen    Salzsäure<B>28'</B> De und 800 Teilen Wasser  einlaufen und stumpft hierauf mit soviel  Natronlauge ab, bis die Kupplung beendet  ist. Der Farbstoff färbt     Acetatseide    in  rotbraunen Tönen von sehr guter Lichtecht  heit.



  Process for the preparation of an azo dye. According to the process described in the main patent, a dye suitable for acetate silk dyeing is obtained with very good lightfastness if the diazo compound prepared from 4-nitro-2-chloro-1-aminobenzene is mixed with 1-methyl-3- (diogy-ethyl) - aminobenzene couples.



  As has now been found, another very valuable dye for acetate silk dyeing is obtained if diazotized 2. 6-dichloro-la.mino-4-nitrobenzene is mixed with 1-methyl-3-di- (ss-ogyäthyl) - aminobenzene couples.



  <I> Example: </I> A diazo solution prepared in the usual way from 20.7 parts of 2,6-dichloro-1-amino-4-nitrobenzene is left in a cold solution of 19.5 parts of 1-methyl-3-di - Run in (ss-ogyäthyl) -aminobenzene in 20 parts of hydrochloric acid <B> 28 '</B> De and 800 parts of water and then blunt it with enough sodium hydroxide solution until the coupling is complete. The dye dyes acetate silk in red-brown shades of very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man 2. 6-Dichlor-l-amino-4-nitrobenzol dia zoniert und die Diazoverbindung mit 1- Methyl-3-di-(ss-ogyäthyl)-aminobenzol kup pelt. Der so erhaltene Farbstoff färbt Acetat seide in rotbraunen Tönen von sehr guter Lichtechtheit. Claim: Process for the preparation of an azo dye, characterized in that 2. 6-dichloro-1-amino-4-nitrobenzene is diazoned and the diazo compound with 1-methyl-3-di- (ss-ogyäthyl) -aminobenzene kup pelt. The dye thus obtained dyes acetate silk in red-brown shades of very good lightfastness.
CH183863D 1934-02-22 1934-12-05 Process for the preparation of an azo dye. CH183863A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE183863X 1934-02-22
CH178543T 1934-12-05

Publications (1)

Publication Number Publication Date
CH183863A true CH183863A (en) 1936-04-30

Family

ID=25720167

Family Applications (1)

Application Number Title Priority Date Filing Date
CH183863D CH183863A (en) 1934-02-22 1934-12-05 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH183863A (en)

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