CH272154A - Process for the preparation of a new chromable monoazo dye. - Google Patents
Process for the preparation of a new chromable monoazo dye.Info
- Publication number
- CH272154A CH272154A CH272154DA CH272154A CH 272154 A CH272154 A CH 272154A CH 272154D A CH272154D A CH 272154DA CH 272154 A CH272154 A CH 272154A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- new
- acid
- chromable
- preparation
- 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
- C09B43/00—Preparation of azo dyes from other azo compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen ehromierbaren Monoazofarbstoffesi Das vorliegende Patent betrifft ein Ver fahren zur Herstellung eines neuen chromier- baren Monoazofarbstoffes und ist, dadurch gekennzeichnet, dal,'> man 1.
11o1 dianotiertes 4,6-Diehlor-2-aminophenol mit 1 Mol des durch saure Kupplung von dianotierter 1-Ani- lin-2,5-disulfonsäure mit 2.-Plienylamino-5-oxy- naphthalin-7-sulfonsäure erhaltenen Monoazo- farbstoffes kuppelt und den erhaltenen Dis- azofarbstoff zur Schliessung des Azinringes mit Säuren oder sauren Salzen behandelt. Der Farbstoff soll zum Färben von Wolle nach dem Nachehromierungsverfahren verwendet werden.
Im nachfolgenden Beispiel bedeuten Teile Gewichtsteile.
Beispiel: 17,8 Teile 4,6-Dichlor-2-aminophenol wer den wie üblich dianotiert und unter Eisküh lung mit 64,5 Teilen des durch saure Kupp lung von dianotierter 1-Anilin-2,5-disulfon- säure mit 2-Phenylamino-5-oxynaphthalin-7- sulfonsäure erhaltenen Monoazofarbstoffes in Gegenwart von Soda vereinigt. Zur Beförde rung der Kupplung kann man 5-10 Volum- prozent. Pyridin zusetzen.
Der so gewonnene Farbstoff löst, sieh in heissem Wasser mit dun kelblaustichig roter und in konzentrierter Schwefelsäure mit dunkelgrüner Farbe. Zur Schliessung des Azinringes wird er bei 400 in 650 Teile konzentrierte Schwefelsäure einge tragen, 2 Stunden bei 400 gerührt, auf Eis und Wasser gegossen. und isoliert. Der neue Azinfarbstoff ist ein dunkles Pulver, das sieh in heissem Wasser mit blauer und in konzen trierter Schwefelsäure mit (),rüner Farbe löst. Wolle wird aus saurem Bade in brauner und nacbchromiert in grauer Nuance von bemer kenswerten Eehtheitseigensehaften angefärbt.
Dieser Farbstoff ist nicht darstellbar durch Kupplung von dianotiertem 4,6-Dichlor 2 aminophenol mit 7-Sulfo-5.-oxy-1,2-naphtho- phenazin, da die Kupplungsenergie sowohl der Diazov erbiiidnnr als auch des Azins zu gering ist.
The present patent relates to a process for the production of a new chromable monoazo dye and is characterized by the fact that 1.
1101 dianotated 4,6-diehlor-2-aminophenol with 1 mol of the monoazo dye obtained by acidic coupling of dianotated 1-aniline-2,5-disulphonic acid with 2.-plienylamino-5-oxynaphthalene-7-sulphonic acid couples and treats the disazo dye obtained to close the azine ring with acids or acidic salts. The dye is intended to be used for dyeing wool using the post-homing process.
In the following example, parts mean parts by weight.
Example: 17.8 parts of 4,6-dichloro-2-aminophenol are dianotized as usual and, under ice cooling, with 64.5 parts of 1-aniline-2,5-disulfonic acid dianotated by acidic coupling with 2- Phenylamino-5-oxynaphthalene-7-sulfonic acid obtained monoazo combined in the presence of soda. 5-10 volume percent can be used to move the coupling. Add pyridine.
The dye obtained in this way dissolves, see in hot water with a dark blue tinge of red and in concentrated sulfuric acid with a dark green color. To close the azine ring, it is carried at 400 in 650 parts of concentrated sulfuric acid, stirred for 2 hours at 400, poured onto ice and water. and isolated. The new azine dye is a dark powder that dissolves in hot water with blue and in concentrated sulfuric acid with (), green color. From an acid bath, wool is dyed in brown and chromium-plated in gray shades with remarkable properties of integrity.
This dye cannot be produced by coupling dianotated 4,6-dichloro-2-aminophenol with 7-sulfo-5.-oxy-1,2-naphthophene azine, since the coupling energy of both the diazide and the azine is too low.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH272154T | 1948-07-16 | ||
CH268844T | 1948-07-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH272154A true CH272154A (en) | 1950-11-30 |
Family
ID=25731040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH272154D CH272154A (en) | 1948-07-16 | 1948-07-16 | Process for the preparation of a new chromable monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH272154A (en) |
-
1948
- 1948-07-16 CH CH272154D patent/CH272154A/en unknown
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