CH175238A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH175238A CH175238A CH175238DA CH175238A CH 175238 A CH175238 A CH 175238A CH 175238D A CH175238D A CH 175238DA CH 175238 A CH175238 A CH 175238A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- azo dye
- dye
- produced
- amino
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Azofarbstoffes. Cxegenstand des vorliegenden Zusatz patentes ist ein Verfahren zur Darstellung eines Azofarbstoffes, welches dadurch ge kennzeichnet ist, dass man .die Diazoverbin- dung von 4-Amino-3,2'-dimethylazobenzol mit 1-Oxy-3,5-di-(4'-chlorphenylamino)-ben- zol kuppelt. Die Einwirkung der beiden Komponenten aufeinander kann auch in Gegenwart eines Substrates erfolgen.
Der in Substanz hergestellte Farbstoff bildet ein dunkles Pulver, welches sich in konzentrierter Schwefelsäure mit blauer Farbe löst, und liefert, wenn auf .der Faser erzeugt, ein dunkles Rotbraun von guten Echtheitseigenschaften.
<I>Beispiel:</I> 22,5 Gewichtsteile 4-Amino-3,2'-dimethyl- azobenzol werden in bekannter Weise diazo- tiert und die Diazolösung mit einer Lösung von 35 Gewichtsteilen 1-Oxy-3,5-di-(4'-chlor- phenylamino)-benzol in verdünnter Natron lauge, welche mit der zur Bindung der über schüssigen Mineralsäure hinreichenden Menge Natriumacetat, sowie mit 5 Gewichtsteilen Türkischrotöl versetzt ist; gekuppelt.
Nach Beendigung .der Farbstoffbildung wird ab filtriert, gut mit Wasser gewaschen und ge trocknet. Die Darstellung des Farbstoffes kann auch in Gegenwart eines Substrates er folgen. Wird der Farbstoff auf der Faser erzeugt, so erhält man ein dunkles Rotbraun von guten Echtheitseigenschaften.
Process for the preparation of an azo dye. The subject of the present additional patent is a process for the preparation of an azo dye, which is characterized in that the diazo compound of 4-amino-3,2'-dimethylazobenzene with 1-oxy-3,5-di- (4 '-chlorophenylamino) -ben- zene couples. The two components can also act on one another in the presence of a substrate.
The dyestuff produced in substance forms a dark powder, which dissolves in concentrated sulfuric acid with a blue color and, if produced on the fiber, provides a dark reddish brown with good fastness properties.
<I> Example: </I> 22.5 parts by weight of 4-amino-3,2'-dimethyl-azobenzene are diazo- tated in a known manner and the diazo solution with a solution of 35 parts by weight of 1-oxy-3,5-di - (4'-chlorophenylamino) -benzene in dilute sodium hydroxide solution, which is mixed with the sufficient amount of sodium acetate to bind the excess mineral acid and with 5 parts by weight of Turkish red oil; coupled.
When the dye formation is complete, it is filtered off, washed well with water and dried. The representation of the dye can also follow in the presence of a substrate. If the dye is produced on the fiber, a dark red-brown with good fastness properties is obtained.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE175238X | 1932-06-25 | ||
CH170090T | 1933-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH175238A true CH175238A (en) | 1935-02-15 |
Family
ID=25718858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH175238D CH175238A (en) | 1932-06-25 | 1933-06-23 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH175238A (en) |
-
1933
- 1933-06-23 CH CH175238D patent/CH175238A/en unknown
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