CH187614A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- 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
Links
Landscapes
- Coloring (AREA)
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)
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) |
-
1935
- 1935-05-13 CH CH187614D patent/CH187614A/en unknown
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