CH272155A - 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
- CH272155A CH272155A CH272155DA CH272155A CH 272155 A CH272155 A CH 272155A CH 272155D A CH272155D A CH 272155DA CH 272155 A CH272155 A CH 272155A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- diazotized
- new
- chromable
- mol
- 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
<B>Zusatzpatent</B> zum Hauptpatent Nr. 268844. Verfahren zur Herstellung eines neuen ehromierbaren Monoazofarbatoffes. Das vorliegende Patent betrifft ein Ver fahren zur Herstellung eines neuen chromier- baren Farbstoffes und ist dadurch gekenn zeichnet,
dass man 1 Mol diazotiertes 4-Chlor- 2-aminophenol mit 1 Mol des durch saure Kupplung von diazotierter 2-Toluidin-4-sul- fonsäure mit 1-Phenylamino-8-oxynaphthalin- 4-sulfonsäure erhaltenen Monoazofarbstoffes kuppelt und den erhaltenen Disazofarbstoff zur Schliessung des Azinringes mit Säuren oder sauren Salzen behandelt.
Der Farbstoff soll zum Färben von Wolle nach dem Nach- chromierungsverfahren verwendet werden.
Im nachfolgenden Beispiel bedeuten Teile Gewichtsteile.
<I>Beispiel;</I> 14,4 Teile 4-Chlor-,2-aminophenol werden wie üblich diazotiert und sodaalkalisch unter Eiskühlung mit 55,7 Teilen .des durch saure Kupplung von diazotierter 2-Toluidin-4-sul- fonsäure mit l.Phenylamino-8-oxynaphthalin- 4-sulfonsäure erhaltenen Monoazofarbstoffes, gegebenenfalls unter Zugabe von 5-10 Vo- lumprozent Pyridin vereinigt.
Hierauf wird das Kupplungsprodukt bei 400 in 650 Teile konzentrierte Schwefelsäure eingetragen und 2 Stunden bei 400 gerührt. Auf Eis und Was ser ausgeladen und filtriert bildet der Farb stoff ein rotes Pulver, das sich in Wasser mit roter und in konzentrierter Schwefelsäure mit blauschwarzer Farbe löst. Wolle wird aus sau rem Bade rotbraun und nachchromiert grau angefärbt., wobei die nachchromierten Färbun gen gute Echtheitseigenschaften aufweisen.
Der vorliegende Farbstoff ist nicht zu gänglich durch Kupplung von diazotiertem 4-Chlor-2-aminophenol mit 4 @Sulfo-8-oxy-1,2- naphthophenazin, da letzteres mit diazotier- tem 4-Chlor-2-aminophenol nicht, kuppelt.
<B> Additional patent </B> to main patent No. 268844. Process for the production of a new honorable monoazo carbate. The present patent relates to a process for the production of a new chromable dye and is characterized by
that 1 mole of diazotized 4-chloro-2-aminophenol is coupled with 1 mole of the monoazo dye obtained by acidic coupling of diazotized 2-toluidine-4-sulphonic acid with 1-phenylamino-8-oxynaphthalene-4-sulphonic acid and the disazo dye obtained is coupled to Closure of the azine ring treated with acids or acid salts.
The dye is intended to be used for dyeing wool using the post-chrome plating process.
In the following example, parts mean parts by weight.
<I> Example; </I> 14.4 parts of 4-chloro-, 2-aminophenol are diazotized as usual and soda-alkaline with ice-cooling with 55.7 parts of .des by acidic coupling of diazotized 2-toluidine-4-sulphonic acid with 1.Phenylamino-8-oxynaphthalene-4-sulfonic acid obtained monoazo, optionally combined with the addition of 5-10 volume percent pyridine.
The coupling product is then introduced into 650 parts of concentrated sulfuric acid at 400 and stirred at 400 for 2 hours. Unloaded on ice and water and filtered, the dye forms a red powder that dissolves in water with red and in concentrated sulfuric acid with a blue-black color. From acidic baths, wool is dyed red-brown and then chrome-plated gray. The chrome-plated colors have good fastness properties.
The present dye is not accessible by coupling diazotized 4-chloro-2-aminophenol with 4 @ sulfo-8-oxy-1,2-naphthophenazine, since the latter does not couple with diazotized 4-chloro-2-aminophenol.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH268844T | 1948-07-16 | ||
| CH272155T | 1948-07-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH272155A true CH272155A (en) | 1950-11-30 |
Family
ID=25731041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH272155D CH272155A (en) | 1948-07-16 | 1948-07-16 | Process for the preparation of a new chromable monoazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH272155A (en) |
-
1948
- 1948-07-16 CH CH272155D patent/CH272155A/en unknown
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