CH249376A - Process for the production of a new azo dye. - Google Patents
Process for the production of a new azo dye.Info
- Publication number
- CH249376A CH249376A CH249376DA CH249376A CH 249376 A CH249376 A CH 249376A CH 249376D A CH249376D A CH 249376DA CH 249376 A CH249376 A CH 249376A
- Authority
- CH
- Switzerland
- Prior art keywords
- production
- azo dye
- sulfuric acid
- new azo
- new
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
- C09B29/08—Amino benzenes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
verfahren zur Herstellung eines neuen Azofarbstoffes. Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Herstellung eines neuen Azofarbstoffes, gemäss welchem diazotiertes 2-Cyan-4-nitralin mit dem Schwefelsäure ester des N-ss-Phenyläthyl-N-;B-oxyäthyl-m- chloranilins gekuppelt wird.
Der neue Farbstoff bildet ein schwarzes Pulver, welches in heissem Wasser eine röt- lichviolette Lösung und in Schwefelsäure eine stumpfe rote Lösung ergibt. Beispiel:
16,3 Teile 2-Cyan-4-nitranilin werden ge mäss der in Beispiel 1 des brit. Patentes Nr. 447561 beschriebenen Methode diazotiert und die so erhaltene Lösung der Diazover- bindung auf Eis gegossen und das Produkt allmählich unter Rühren einer gekühlten Lö sung von 37,
8 Teilen des Natriumsalzes des N-ss-Phenyläthyl - N-ss-oxyäthyl - m - chlorani- linschwefelsäureesters in 400 Teilen Wasser hinzugesetzt.
Nach beendeter Kupplung wird das Gemisch langsam mit 40%igem wässri- gem Natriumhydroxyd so lange versetzt, und zwar unter Aufrechterhaltung einer Tempe ratur von weniger als 10 C, bis das Gemisch eben lackmusalkalisch reagiert. Hierauf wird während einer weiteren Stunde gerührt und der Farbstoff alsdann abfiltriert, mit wenig Wasser gewaschen und bei 30-40 C ge trocknet.
Der Farbstoff bildet ein schwarzes Pulver, welches in heissem Wasser unter Bil dung einer rötlich-violetten Lösung und in Schwefelsäure unter Bildung einer stumpfen roten Lösung löslich ist. Er färbt Zellulose- acetatkunstseide und Polyamidfasern oder Polyamidgewebe in hellen rötlich-violetten Farbtönen von sehr guter Licht- und Nass- echtheit, sofern das Auffärben aus einem neutralen, Natriumchlorid oder Natriumsulfat enthaltenden Färbebade erfolgt.
process for the production of a new azo dye. The present invention relates to a process for the preparation of a new azo dye, according to which diazotized 2-cyano-4-nitralin is coupled with the sulfuric acid ester of N-ß-phenylethyl-N-; B-oxyethyl-m-chloroaniline.
The new dye forms a black powder, which in hot water gives a reddish-violet solution and in sulfuric acid a dull red solution. Example:
16.3 parts of 2-cyano-4-nitroaniline are diazotized according to the method described in Example 1 of British Patent No. 447561 and the solution of the diazo compound thus obtained is poured onto ice and the product is gradually added to a cooled solution while stirring from 37,
8 parts of the sodium salt of N-ß-phenylethyl-N-ß-oxyethyl-m-chloroaniline sulfuric acid ester in 400 parts of water are added.
After the coupling is complete, 40% aqueous sodium hydroxide is slowly added to the mixture, while maintaining a temperature of less than 10 ° C., until the mixture reacts in a litmus-alkaline manner. The mixture is then stirred for a further hour and the dye is then filtered off, washed with a little water and dried at 30.degree.-40.degree.
The dye forms a black powder which is soluble in hot water to form a reddish-purple solution and in sulfuric acid to form a dull red solution. It dyes cellulose acetate rayon and polyamide fibers or polyamide fabric in light reddish-violet shades of very good lightfastness and wet fastness, provided the dyeing is done with a neutral dye bath containing sodium chloride or sodium sulfate.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB249376X | 1944-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH249376A true CH249376A (en) | 1947-06-30 |
Family
ID=10219640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH249376D CH249376A (en) | 1944-08-28 | 1945-08-28 | Process for the production of a new azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH249376A (en) |
-
1945
- 1945-08-28 CH CH249376D patent/CH249376A/en unknown
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