CH143393A - Process for the preparation of a water-insoluble azo dye. - Google Patents
Process for the preparation of a water-insoluble azo dye.Info
- Publication number
- CH143393A CH143393A CH143393DA CH143393A CH 143393 A CH143393 A CH 143393A CH 143393D A CH143393D A CH 143393DA CH 143393 A CH143393 A CH 143393A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- preparation
- azo dye
- insoluble azo
- dye
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfaftren zur Darstellung eines wassertinlöslichen Azofarbstoffes. Es wurde gefunden, dass man Azofarb- #4offe von sehr gaten Echtheitseigenschaften erhält, wenn man Diazo-Verbindun,ren der Benzolreille, welche mindestens eine negative Gruppe enthalten, mit den bisher unbekann ten 2<B>.</B> 3-Oxyniiphto-\:,1-4-#,#ilhyl-,oxy-l'-jiaph- tylaminen kuppelt.
Gegenstand der vorliegenden<B>E</B> riindung ist gin Verfahren zur Darstellun- eines wasserunlösliehen Azofarbstoffes von sehr Akuten Echtheitsei-eiischaften, welches<B>da-</B> durch gekennzeichnet ist, dass man die Diazo- verbindung von 4-Nitro-2-methoxy-l-amino- benzol mit 2. 3-Oxyliaphtoyl-4'-methoxy-l- na,phtylamin kuppelt.
Der Farbstoff besitzt einen schönen, gra- natfarbenen Farbton und zeichnet sieh durch sehr gute Lichteehtheit aus.
<I>Beispiel:</I> <B>16,8</B> Gewiehtsteile 4-Nitro-2-m-ethoxy-l- amino-benzol werden in bekannter Weise mit Salzsäure und Natriumnitrit diazotiert. Die Diazolösung lässt man unter gutem Rühren in eine wässerige Suspension von<B>36</B> Ge wichtsteilen 2. 3-Oxynaphtoyl-4'-methoxy-l- liaphtvjamin, bereitet durch Auflösen dieser Verbindung in verdünnter Natronlauge und Wiederausfällen mit verdünnter Essigsäure, einlaufen.
Der Farbstoff scheidet sich in gra- natgefärbten Flocken ab. Er wird nach Be endigung der Kupplung abgesaugt und bildet nach dem Trocknen ein in Wasser unlösliches Pulver. Er zeichnet sieh durch sehr gute Lichtbeständigkeit aus. Je nach dem Ver wendungszweck des Farbstoffes können bei der Kupplung Substrate anorganischer oder organischer Natur zugesetzt werden.
Procedure for the preparation of a water-soluble azo dye. It has been found that azo dyes with very good fastness properties are obtained if diazo compounds of the benzene ring, which contain at least one negative group, are obtained with the previously unknown 2. 3-oxyniphto - \ :, 1-4 - #, # ilhyl-, oxy-l'-jiaphthylaminen couples.
The subject matter of the present invention is a process for the preparation of a water-insoluble azo dye of very acute fastness properties, which is characterized by the fact that the diazo compound of 4 -Nitro-2-methoxy-1-amino-benzene coupled with 2. 3-oxyliaphtoyl-4'-methoxy-l-na, phtylamine.
The dye has a beautiful, granite-colored shade and is characterized by very good lightness.
<I> Example: </I> <B> 16.8 </B> parts by weight of 4-nitro-2-m-ethoxy-1-amino-benzene are diazotized in a known manner with hydrochloric acid and sodium nitrite. The diazo solution is allowed to stir well into an aqueous suspension of 36 parts by weight of 2. 3-oxynaphtoyl-4'-methoxy-l-liaphthovyamine, prepared by dissolving this compound in dilute sodium hydroxide solution and reprecipitating with dilute acetic acid , run in.
The dye is deposited in granite-colored flakes. It is suctioned off after the coupling has ended and, after drying, forms a powder which is insoluble in water. It is characterized by very good lightfastness. Depending on the intended use of the dye, substrates of inorganic or organic nature can be added during the coupling.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE143393X | 1928-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH143393A true CH143393A (en) | 1930-11-15 |
Family
ID=5669676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH143393D CH143393A (en) | 1928-02-18 | 1929-02-15 | Process for the preparation of a water-insoluble azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH143393A (en) |
-
1929
- 1929-02-15 CH CH143393D patent/CH143393A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH143393A (en) | Process for the preparation of a water-insoluble azo dye. | |
DE693660C (en) | Process for the production of azo dyes | |
CH146434A (en) | Process for the preparation of a water-insoluble azo dye. | |
CH153708A (en) | Process for the preparation of a substantive polyazo dye. | |
CH121714A (en) | Process for the preparation of a disazo dye. | |
CH143595A (en) | Process for the preparation of a stain-coloring disazo dye. | |
CH153709A (en) | Process for the preparation of a substantive polyazo dye. | |
CH121715A (en) | Process for the preparation of a disazo dye. | |
CH153706A (en) | Process for the preparation of a substantive polyazo dye. | |
CH140009A (en) | Process for the preparation of a strongly basic azo dye. | |
CH218816A (en) | Process for the preparation of a disazo dye. | |
CH129185A (en) | Process for the preparation of a monoazo dye. | |
CH153704A (en) | Process for the preparation of a substantive polyazo dye. | |
CH135390A (en) | Process for the production of a new azo dye. | |
CH135961A (en) | Process for the preparation of an azo dye. | |
CH143592A (en) | Process for the preparation of a stain-coloring disazo dye. | |
CH143593A (en) | Process for the preparation of a stain-coloring disazo dye. | |
CH141536A (en) | Process for the preparation of an azo dye which contains a nitroso group in the molecule. | |
CH153710A (en) | Process for the preparation of a substantive polyazo dye. | |
CH297249A (en) | Process for the preparation of a polyazo dye. | |
CH153705A (en) | Process for the preparation of a substantive polyazo dye. | |
CH268397A (en) | Process for the preparation of an azo dye. | |
CH147797A (en) | Process for the preparation of a water-insoluble azo dye. | |
CH145153A (en) | Process for the preparation of an azo dye. | |
CH146766A (en) | Process for the production of a new azo dye. |