CH191430A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH191430A
CH191430A CH191430DA CH191430A CH 191430 A CH191430 A CH 191430A CH 191430D A CH191430D A CH 191430DA CH 191430 A CH191430 A CH 191430A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
bromo
dye
dioxyethylaminobenzene
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 CH191430A publication Critical patent/CH191430A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Gemäss dem im Hauptpatent     bescbriebe-          nen    Verfahren erhält man einen     Acetatseide     in sehr lichtechten klaren Scharlachtönen an  färbenden Farbstoff, wenn man     diazotiertes          4-Nitro-l-aminobenzol    mit     3-Chlor-l-dioxy-          äthylaminobenzol    kuppelt.  



  Wie nun weiter- gefunden wurde, erhält       man    einen Farbstoff von ganz ähnlichen Eigen  schaften, wenn man     diazotiertes        4-Nitro-2-          brom-l-aminobenzol    mit     3-Broni-l-dioxyäthyl-          aminobenzol    kuppelt. .  



  <I>Beispiel:</I>  Eine in. üblicher Weise aus 21,7 Teilen       4-Nitro-2-brom-l-aininobenzol    hergestellte       Diazolösung    fliesst in eine kalte Lösung von  26 Teilen     3-Brom-l-dioxyäthylamiriobenzol    in    25 Teilen Salzsäure 23              B6    und 800 Teilen  Wasser ein. Der nach     Beendigurig    der Kupp  lung mit     Natriumacetat    anfallende Farbstoff  färbt     Acetatseide    in echten blauroten Tönen  an.



  Process for the preparation of an azo dye. According to the process described in the main patent, an acetate silk in very lightfast, clear scarlet shades of coloring dye is obtained when diazotized 4-nitro-1-aminobenzene is coupled with 3-chloro-1-dioxyethylaminobenzene.



  As has now also been found, a dye with very similar properties is obtained when diazotized 4-nitro-2-bromo-1-aminobenzene is coupled with 3-broni-1-dioxyethylaminobenzene. .



  <I> Example: </I> A diazo solution prepared in the usual way from 21.7 parts of 4-nitro-2-bromo-1-aininobenzene flows into a cold solution of 26 parts of 3-bromo-1-dioxyethylaminobenzene in 25 parts Hydrochloric acid 23 B6 and 800 parts of water. The dye obtained after the coupling with sodium acetate stains the acetate silk in real blue-red tones.

Claims (1)

PATENTANSPRÜCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man diazotiertes 4-Nitro-2-brom-l-aniinoberizol mit 3-Brom-l-dioxyäthylaminobenzol kuppelt. Der Farbstoff färbt Acetatseide in echten blau roten Tönen an. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that diazotized 4-nitro-2-bromo-1-aniinoberizole is coupled with 3-bromo-1-dioxyethylaminobenzene. The dye stains acetate silk in real blue-red tones.
CH191430D 1935-03-13 1936-02-06 Process for the preparation of an azo dye. CH191430A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE191430X 1935-03-13
CH188887T 1936-02-06

Publications (1)

Publication Number Publication Date
CH191430A true CH191430A (en) 1937-06-15

Family

ID=25721698

Family Applications (1)

Application Number Title Priority Date Filing Date
CH191430D CH191430A (en) 1935-03-13 1936-02-06 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH191430A (en)

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