CH183862A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH183862A
CH183862A CH183862DA CH183862A CH 183862 A CH183862 A CH 183862A CH 183862D A CH183862D A CH 183862DA CH 183862 A CH183862 A CH 183862A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
aminobenzene
dye
nitro
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 CH183862A publication Critical patent/CH183862A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstofes.       Gemäss dem im Hauptpatent beschriebe  nen Verfahren erhält man einen für die     Ace-          tatseidenfärberei    geeigneten Farbstoff vor)  sehr guter Lichtechtheit, wenn man die aus       4-Nitro-2-clrlor--1-amir)obenzol    bereitete     Diazo-          verbindung    mit     1-Metbyl.3-(dioxyäthyl)-amino-          benzol    kuppelt.  



  Wie nun weiter gefunden wurde, erhält  man einen ebenfalls für die     Acetatseiden-          färberei    sehr wertvollen Farbstoff, wenn man  dianotiertes     4-Nitro-2-bi(im-l-aminober)zol    mit       1-Methyl-3-di-(13-oxyäthyl)-amir)obenzol    kup  pelt.  



  <I>Beispiel:</I>  Eine aus 21,7 Teilen     4-Nitro-2-brom-l-          aminobenzol    auf dem üblichen Wege darge  stellte     Diazolösung    lässt man in eine kalte  Lösung von 19,5 Teilen     1-Methyl-3-di-(ss-oxy-          ä,thyl)-aminobenzol    in 20 Teilen Salzsäure    <B>23"</B>     B6    und 600 Teilen Wasser einfliessen  und stumpft zur Beendigung der Kupplung  mit     Natriumacetat    ab. Der anfallende Farb  stoff färbt     Acetatseide    in klaren, rubinroten  Tönen von sehr guter Lichtechtheit an.



  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-amir) is obtained with 1-methyl. 3- (dioxyethyl) amino benzene couples.



  As has now been found, another very valuable dye for acetate silk dyeing is obtained if dianotated 4-nitro-2-bi (im-1-aminober) zene is mixed with 1-methyl-3-di- (13-oxyethyl) ) -amir) obenzol kup pelt.



  <I> Example: </I> A diazo solution made from 21.7 parts of 4-nitro-2-bromo-l-aminobenzene in the usual way is allowed to pour into a cold solution of 19.5 parts of 1-methyl-3- Pour in di- (ss-oxy- ä, ethyl) -aminobenzene in 20 parts of hydrochloric acid 23 "B6 and 600 parts of water and blunt with sodium acetate to terminate the coupling. The resulting dye gives the acetate silk a clear color , ruby-red tones of very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 4-Nitro-2-brom-l-aminobenzol dianotiert und die Diazoverbindung mit 1-Methyl-3-di-(p-oxy- äthyl)-aminobenzol kuppelt. Der so erhaltene Farbstoff färbt Acetat seide in klaren, rubinroten Tönen von sehr guter Lichtechtheit an. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that 4-nitro-2-bromo-1-aminobenzene is dianotated and the diazo compound is coupled with 1-methyl-3-di- (p-oxyethyl) aminobenzene. The dye obtained in this way stains acetate silk in clear, ruby-red shades of very good lightfastness.
CH183862D 1934-02-22 1934-12-05 Process for the preparation of an azo dye. CH183862A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE183862X 1934-02-22
CH178543T 1934-12-05

Publications (1)

Publication Number Publication Date
CH183862A true CH183862A (en) 1936-04-30

Family

ID=25720166

Family Applications (1)

Application Number Title Priority Date Filing Date
CH183862D CH183862A (en) 1934-02-22 1934-12-05 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH183862A (en)

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