CH187923A - Process for the preparation of an insoluble azo dye. - Google Patents

Process for the preparation of an insoluble azo dye.

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Publication number
CH187923A
CH187923A CH187923DA CH187923A CH 187923 A CH187923 A CH 187923A CH 187923D A CH187923D A CH 187923DA CH 187923 A CH187923 A CH 187923A
Authority
CH
Switzerland
Prior art keywords
azo dye
insoluble azo
preparation
diazotized
dye
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 CH187923A publication Critical patent/CH187923A/en

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Description

  

  Verfahren zur Herstellung eines unlöslichen     Azofarbstoffes.       Gemäss dem im Hauptpatent beschrie  benen Verfahren erhält man einen Acetat  seide in blaustichig roten Tönen anfärbenden  unlöslichen     Azofarbstoff,    wenn man     4-Ni-          tro-l-aminoben.zol        diazotiert    und die     Diazo-          verbindung    mit     1-Butyl-3-oxy-7-chlortetra-          liydroehinolin    kuppelt.  



  Wie nun weiter gefunden wurde, erhält  man einen Farbstoff von ähnlichen Eigen  schaften, wenn man     6-Brom-2.4-dinitro-l-          aminobenzol        diazotiert    und die     Diazoverbin-          dung    mit     1-Äthyl-3-oxy-7-methyl-tetrahydro-          chinolin    kuppelt.

      <I>Beispiel:</I>    26,2 Teile     6-Brom-2.        4-dinitro-l-amino-          benzol    werden in der üblichen Weise     diazo-          tiert.    Die     Diazoverbindung    lässt man in eine    eisgekühlte Lösung von 19,2     Teilen        1-Äthyl-          3-oxy-7-methyl-tetrahydrochinolin    in der ent  sprechenden Menge     verdünnter    Salzsäure ein  laufen und stumpft zur Beendigung der  Kupplung mit     Natriumacetat    ab.

   Der erhal  tene     Farbstoff    färbt     Acetatseide    im Seifen  suspensionsbad rötlich blau.



  Process for the preparation of an insoluble azo dye. According to the process described in the main patent, an insoluble azo dye which stains acetate silk in bluish red shades is obtained if 4-nitro-1-aminoben.zol is diazotized and the diazo compound is treated with 1-butyl-3-oxy-7- chlorotetra- liydroehinoline couples.



  As has now been found further, a dye with similar properties is obtained if 6-bromo-2,4-dinitro-l-aminobenzene is diazotized and the diazo compound is diazotized with 1-ethyl-3-oxy-7-methyl-tetrahydroquinoline clutch.

      <I> Example: </I> 26.2 parts 6-bromo-2. 4-Dinitro-1-aminobenzene are diazotized in the usual way. The diazo compound is poured into an ice-cold solution of 19.2 parts of 1-ethyl-3-oxy-7-methyl-tetrahydroquinoline in the appropriate amount of dilute hydrochloric acid and blunted with sodium acetate to terminate the coupling.

   The dye obtained gives the acetate silk a reddish blue color in the soap suspension bath.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines unlös lichen Azofarbstoffes, dadurch gekennzeich net, d.ass man 6-Brom-2. 4-dinitro-l-amino- benzol diazotiert und die Diazoverbindung mit 1-Äthyl-3-oxy-7-methyl-tetrahydrochino- lin kuppelt. Der erhaltene Farbstoff färbt Acetatseide rötlichblau. PATENT CLAIM: Process for the production of an insoluble azo dye, characterized in that 6-bromo-2. 4-dinitro-1-aminobenzene is diazotized and the diazo compound is coupled with 1-ethyl-3-oxy-7-methyl-tetrahydroquinoline. The dye obtained dyes acetate silk reddish blue.
CH187923D 1934-08-11 1935-05-07 Process for the preparation of an insoluble azo dye. CH187923A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187923X 1934-08-11
CH185944T 1935-05-07

Publications (1)

Publication Number Publication Date
CH187923A true CH187923A (en) 1936-11-30

Family

ID=25721284

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187923D CH187923A (en) 1934-08-11 1935-05-07 Process for the preparation of an insoluble azo dye.

Country Status (1)

Country Link
CH (1) CH187923A (en)

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