CH187614A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH187614A
CH187614A CH187614DA CH187614A CH 187614 A CH187614 A CH 187614A CH 187614D A CH187614D A CH 187614DA CH 187614 A CH187614 A CH 187614A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
dye
diazotized
oxyethylamino
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 CH187614A publication Critical patent/CH187614A/en

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Description

  

  \'erfahren zur Herstellung     eines        Azofarbstoffes.       Es wurde gefunden, dass man zu neuen       Azofarbstoffen    in der Weise gelangen kann,  dass man     diazotierte        2-Aminothiazolverbin-          dungen    mit in     p-Stellung    zu einer     Amino-          gruppe    kuppelnden Aminen vereinigt.

   Die  so erhältlichen Farbstoffe sind besonders ge  eignet zum Färben von Estern der Zellulose,  wie     Zelluloseazetatseide,    und liefern im all  gemeinen klare     gelbstichig    bis blaustichig  rote Töne von guter     Ätzbarkeit.    Soweit die  Farbstoffe eine primäre     Aminogruppe    enthal  ten, können sie auf der Faser     diazotiert    und  weiter entwickelt werden.  



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines     Azofarb-          stoffes.    Es ist dadurch gekennzeichnet, dass  man     6-Metlroxy-2-benzothiazol        diazotiert    und  mit     1-Oxyäthylamino-5-r)aphthol    kuppelt. Der       Farbstoff    färbt     Azetatseide    aus dem Seifen  bad in klaren, gut     ätzbaren    rein blauen Tönen.

      <I>Beispiel:</I>  18 Gewichtsteile     6-Aletboxy-2-benzothia-          zol    werden in üblicher Weise     diazotiert    und  in stark mineralsaurer Lösung mit 20,3     (xe-          wichtsteilen        1-Oxyäthylamino-5-naphthol    ge  kuppelt.     lflan    rührt noch einige Zeit weiter,  neutralisiert die freie Mineralsäure     mitNatron-          lauge,    saugt ab und wäscht mit Wasser.. Der  erhaltene     Farbstoff    färbt     Azetatseide    in sehr  kräftigen blauen, rein weiss     ätzbaren    Tönen.



  \ 'experienced in the production of an azo dye. It has been found that new azo dyes can be obtained by combining diazotized 2-aminothiazole compounds with amines which couple in the p-position to form an amino group.

   The dyes obtainable in this way are particularly suitable for dyeing esters of cellulose, such as cellulose acetate silk, and generally provide clear yellowish to bluish red tones of good etchability. If the dyes contain a primary amino group, they can be diazotized on the fiber and developed further.



  The subject of the present patent is a process for the production of an azo dye. It is characterized in that 6-metroxy-2-benzothiazole is diazotized and coupled with 1-oxyethylamino-5-r) aphthol. The dye colors acetate silk from the soap bath in clear, easily etchable, pure blue tones.

      <I> Example: </I> 18 parts by weight of 6-aletboxy-2-benzothiazole are diazotized in the usual way and coupled with 20.3 parts by weight of 1-oxyethylamino-5-naphthol. Lflan is stirred in a strongly mineral acid solution for a while, neutralizes the free mineral acid with caustic soda, sucks off and washed with water .. The dye obtained dyes acetate silk in very strong blue, pure white etchable shades.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet; dass man 6- 3#lethoxy-2-benzotbiazol diazotiert und mit 1- Oxyäthylamino-5-naphtbol kuppelt. Der Farbstoff färbt Azetatseide aus dem Seifenbad in klaren; gut ätzbaren rein blauen Tönen. PATENT CLAIM: Process for the production of an azo dye, characterized in that; that 6- 3 # lethoxy-2-benzotbiazole is diazotized and coupled with 1- oxyethylamino-5-naphthol. The dye turns acetate silk from the soap bath into clear; well-etchable pure blue tones.
CH187614D 1934-05-15 1935-05-13 Process for the preparation of an azo dye. CH187614A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187614X 1934-05-15
CH183687T 1935-05-13

Publications (1)

Publication Number Publication Date
CH187614A true CH187614A (en) 1936-11-15

Family

ID=25720903

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187614D CH187614A (en) 1934-05-15 1935-05-13 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH187614A (en)

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