CH233085A - Process for the preparation of a chromable monoazo dye. - Google Patents
Process for the preparation of a chromable monoazo dye.Info
- Publication number
- CH233085A CH233085A CH233085DA CH233085A CH 233085 A CH233085 A CH 233085A CH 233085D A CH233085D A CH 233085DA CH 233085 A CH233085 A CH 233085A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromable
- yellow
- preparation
- monoazo dye
- dye
- 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
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/14—Monoazo compounds
- C09B45/16—Monoazo compounds containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Darstellung eines chromierbaren Monoazofarbstoffes. Es wurde gefunden, dass man wertvolle chromierbare Monoazofarbstoffe erhält, wenn man diazotierte 2-Aminophenol-6-sulfonsäu- ren, die in 4-Stellung einen Cyeloalkylrest oder einen Alkylrest von 3 bis und mit 8 Kohlenstoffatomen enthalten,
mit Pyrazolo- nen ohne freie Sulfon- und Carbonsäuregrup- pen kuppelt.
Gegenstand vorliegenden Zusatzpatentes ist ein Verfahren zur Herstellung eines chro- mierbaren Monoazofarbstoffes, dadurch ge kennzeichnet, dass man diazotierte 2-Amino- 4-isopropylphenol-6-sulfonsäure mit 1-Phe- nyl-3-methyl-5-pyrazolon kuppelt.
Der neue Farbstoff stellt ein gelbbraunes Pulver dar, dessen Lösung in Wasser gelb orange, in Schwefelsäure orange gefärbt ist. Er färbt Wolle beim Behandeln mit Chrom salzen in gelbstichigroten Tönen. <I>Beispiel:</I> 23,1 Teile 2-Amino-4-isopropylphenol-6- sulfonsäure (aus 4-Isopropylphenol durch Sulfonierung, Nitrierung und Reduktion dar gestellt;
die freie Säure -wird als graues, in heissem Wasser gut lösliches Kristallpulver erhalten) werden in üblicher Weise indirekt diazotiert. Die Diazoniumverbindung kup pelt man mit<B>17,9</B> Teilen 1-Phenyl-3-methyl- 5-pyrazolon in sodaalkalischer Lösung. Nach Beendigung der Färbstoffbildung wird der Farbstoff ausgesalzen, abfiltriert und ge trocknet.
Er wird als gelbbraunes Pulver er halten, das sich in Wasser mit gelboranger, in konzentrierter Schwefelsäure mit oranger Farbe löst. Aus saurem Bade zieht er auf Wolle in gelben Tönen, die durch. Nachcliro- mieren in ein gelbstichiges Rot mit guten Nass- und Lichtechtheiten übergehen. Fär bungen mit den gleichen Eigenschaften wer den auch direkt nach dem Einbadchromier- verfahren erhalten.
Process for the preparation of a chromable monoazo dye. It has been found that valuable chromable monoazo dyes are obtained if diazotized 2-aminophenol-6-sulfonic acids which contain a cyeloalkyl radical or an alkyl radical of 3 to 8 carbon atoms in the 4-position,
couples with pyrazolones without free sulfonic and carboxylic acid groups.
The subject of the present additional patent is a process for the production of a chromable monoazo dye, characterized in that diazotized 2-amino-4-isopropylphenol-6-sulfonic acid is coupled with 1-phenyl-3-methyl-5-pyrazolone.
The new dye is a yellow-brown powder, the solution of which is yellow-orange in water and orange in sulfuric acid. When treated with chromium salts, it dyes wool in shades of yellow-tinged red. <I> Example: </I> 23.1 parts of 2-amino-4-isopropylphenol-6-sulfonic acid (made from 4-isopropylphenol by sulfonation, nitration and reduction;
the free acid is obtained as a gray crystal powder which is readily soluble in hot water) is diazotized indirectly in the usual way. The diazonium compound is coupled with 17.9 parts of 1-phenyl-3-methyl-5-pyrazolone in a soda-alkaline solution. When the dye formation is complete, the dye is salted out, filtered off and dried.
It is kept as a yellow-brown powder that dissolves in water with yellow-orange color and in concentrated sulfuric acid with orange color. From an acidic bath he pulls on wool in yellow tones that pull through Post-circling changes to a yellowish red with good wet and light fastness properties. Dyes with the same properties are also obtained directly after the single-bath chrome plating process.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH230906T | 1942-05-16 | ||
CH233085T | 1942-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH233085A true CH233085A (en) | 1944-06-30 |
Family
ID=25727510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH233085D CH233085A (en) | 1942-05-16 | 1942-05-16 | Process for the preparation of a chromable monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH233085A (en) |
-
1942
- 1942-05-16 CH CH233085D patent/CH233085A/en unknown
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