CH183864A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH183864A
CH183864A CH183864DA CH183864A CH 183864 A CH183864 A CH 183864A CH 183864D A CH183864D A CH 183864DA CH 183864 A CH183864 A CH 183864A
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 CH183864A publication Critical patent/CH183864A/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-'Titro-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-Dibrom-l-amino-4-          nitrobenzol    mit     1-Methyl-3-di-(ss-ogyäthyl)-          aminobenzol    kuppelt.  



  <I>Beispiel:</I>  Eine aus 29,6 Teilen     2.6-Dibrom-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>2,3'</B>     B6    und 800 Teilen Wasser  einlaufen und stumpft hierauf mit Natron  lauge ab, bis die Kupplung beendet ist. Der  Farbstoff färbt     Acetatseide    in lichtechten,  rotbraunen Tönen an.



  Process for the preparation of an azo dye. According to the process described in the main patent, a dye which is suitable for acetate silk dyeing and has very good lightfastness is obtained 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-dibromo-1-amino-4-nitrobenzene is coupled with 1-methyl-3-di- (s-ogyethyl) aminobenzene .



  <I> Example: </I> A diazo solution prepared in the usual way from 29.6 parts of 2,6-dibromo-1-amino-4-nitrobenzene is left in a cold solution of 19.5 parts of 1-methyl-3- Run in di- (ss-ogyäthyl) -aminobenzene in 20 parts of hydrochloric acid 2.3 'B6 and 800 parts of water and then blunt with sodium hydroxide until the coupling is complete. The dye stains acetate silk in lightfast, red-brown tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man 2.6-Dibrom-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 lichtechten, rotbraunen Tönen an. Claim: Process for the preparation of an azo dye, characterized in that 2.6-dibromo-1-amino-4-nitrobenzene is diazoned and the diazo compound is kup pelt with 1-methyl-3-di- (ss-ogyäthyl) aminobenzene. The dye thus obtained stains acetate silk in lightfast, red-brown tones.
CH183864D 1934-02-22 1934-12-05 Process for the preparation of an azo dye. CH183864A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE183864X 1934-02-22
CH178543T 1934-12-05

Publications (1)

Publication Number Publication Date
CH183864A true CH183864A (en) 1936-04-30

Family

ID=25720168

Family Applications (1)

Application Number Title Priority Date Filing Date
CH183864D CH183864A (en) 1934-02-22 1934-12-05 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH183864A (en)

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