CH124138A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH124138A CH124138A CH124138DA CH124138A CH 124138 A CH124138 A CH 124138A CH 124138D A CH124138D A CH 124138DA CH 124138 A CH124138 A CH 124138A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- azo dye
- dyes
- dye
- methyl
- Prior art date
Links
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- Coloring (AREA)
Description
Verfahren zur Darstellung eines Azofarbstoffes: Es ist gefunden worden, dass man ganz allgemein zu Azofarbstoffen mit wertvollen Echtheitseigenschaften gelangt, wenn man zu deren Aufbau Diazotierungs- oder Kupp lungskomponenten verwendet, die in der Diazo- oder Kupplungskomponente oder in beiden gleichzeitig eine oder mehrere Carbonsäure- estergruppen enthalten.
Besitzen die Farbstoffe neben diesen Carbonsäureestergruppen noch chromierfähige Gruppen, z. B. in der Diazokomponente einen Anthranilsäure- oder o-Aminophenolkomplex oder in der Kupplungskomponente z. B. einen Salicylsäure- oder Chromotropsäurerest, so können die Echtheitseigenschaften durch Nachchromieren noch weiter erhöht werden.
Je nach dem Charakter der zum Aufbau der Farbstoffe benutzten Komponenten können diese als Pigment-, Woll-, Seide-, Acetatseide- oder als Substantive Farbstoffe verwendet werden.
Gegenstand dieses Patentes ist ein Ver fahren zur Darstellung eines derartigen Farb stoffes durch Kuppeln von diazotiertem Anthranilsäuremethylester mit 1 (2'-Chlor-5'- sulfophenyl)-3-methyl-5-pyrazolon. Beispiel: 310,5 Gewichtsteile des Natriumsalzes des 1 (2'-Chlor-5'-sulfophenyl)-3-methyl-5-pyra- zolons werden in Wasser unter Zusatz von überschüssiger Natriumaeetatlösung gelöst.
Dazu läuft eine in normaler Weise erhaltene Diazoverbindung aus 151 Gewichtsteilen o-Aminobenzoesäuremethylester.
Der mit wenig Kochsalzlösung abgeschie dene Farbstoff stellt nach dem Absaugen und Trocknen ein gelbes Pulver dar, welches Wolle und Seide in einem sehr egalen, gelben Farbton anfärbt.
Process for the preparation of an azo dye: It has been found that in general azo dyes with valuable fastness properties can be obtained if diazotization or coupling components are used in the diazo or coupling component or in both at the same time one or more carboxylic acid contain ester groups.
In addition to these carboxylic acid ester groups, the dyes also have chromable groups, e.g. B. in the diazo component an anthranilic acid or o-aminophenol complex or in the coupling component z. B. a salicylic acid or chromotropic acid residue, the fastness properties can be further increased by chromium plating.
Depending on the character of the components used to build up the dyes, these can be used as pigment, wool, silk, acetate silk or as noun dyes.
The subject of this patent is a process for the preparation of such a dye by coupling diazotized methyl anthranilate with 1 (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone. Example: 310.5 parts by weight of the sodium salt of 1 (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone are dissolved in water with the addition of excess sodium acetate solution.
A diazo compound obtained in the normal way from 151 parts by weight of methyl o-aminobenzoate runs for this purpose.
The dye deposited with a little saline solution is a yellow powder after suction and drying, which dyes wool and silk in a very even, yellow shade.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE124138X | 1925-11-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH124138A true CH124138A (en) | 1928-01-02 |
Family
ID=5658098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH124138D CH124138A (en) | 1925-11-19 | 1926-11-16 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH124138A (en) |
-
1926
- 1926-11-16 CH CH124138D patent/CH124138A/en unknown
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