CH122930A - Process for the preparation of a new dye. - Google Patents
Process for the preparation of a new dye.Info
- Publication number
- CH122930A CH122930A CH122930DA CH122930A CH 122930 A CH122930 A CH 122930A CH 122930D A CH122930D A CH 122930DA CH 122930 A CH122930 A CH 122930A
- Authority
- CH
- Switzerland
- Prior art keywords
- brown
- color
- dye
- preparation
- dissolves
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines neuen Farbstoffes. Es wurde gefunden, dass man einen in Wasser löslichen Farbstoff erhält, der vorzugs weise die tierische . Faser in gelbstichig braunen licht- und walkechten Tönen anfärbt, wenn man ein Molekül 2.6-Dihalogen-3.5- dinitrotoluol mit zwei Molekülen 2'-4'-Di- methyl-4-aminodiphenylamin-2-sulfosäüre kon densiert.
Beispiel: 25,1 Gewichtsteile 2.6-Dichlor-3.5-dinitro- toluol werden mit 500 Teilen Wasser, in dem 30 Gewichtsteile calcinierte Soda gelöst sind, und mit 58,4 Gewichtsteilen 2'-4'-Dimethyl- 4-aminodiphenylamin-2-sulfosäure vereinigt. Nach Zugabe von 1/2 Gewichtsteilen Kupfer sulfat wird 20 Stunden gekocht.
Dann wird die entstandene tief rotbraun gefärbte Lösung filtriert und der Farbstoff ausgesalzen. Dem Farbstoff kommt folgendes Formelbild zu
EMI0001.0017
Das Natronsalz stellt ein schwarzbraunes Kristallpulver dar, welches sich in konzentrier ter Schwefelsäure mitgrünlicher Farbelöst. Beim Erwärmen schlägt die Farbe nach violett um. Der Farbstoff ist in Alkohol mit brauner Farbe etwas löslich, in Wasser löst er sich sehr leicht mit rotbrauner Farbe. Auf der Woll- faser erzeugt er gelbstichig braune Töne.
Process for the preparation of a new dye. It has been found that a water-soluble dye is obtained which is preferably animal. Fibers are dyed in yellowish brown lightfast and whackfast shades if one molecule of 2,6-dihalo-3,5-dinitrotoluene is condensed with two molecules of 2'-4'-dimethyl-4-aminodiphenylamine-2-sulfonic acid.
Example: 25.1 parts by weight of 2,6-dichloro-3,5-dinitro toluene are mixed with 500 parts of water in which 30 parts by weight of calcined soda are dissolved, and with 58.4 parts by weight of 2'-4'-dimethyl-4-aminodiphenylamine-2- sulfonic acid combined. After adding 1/2 part by weight of copper sulfate, the mixture is boiled for 20 hours.
Then the resulting deep red-brown colored solution is filtered and the dye is salted out. The following formula applies to the dye
EMI0001.0017
The sodium salt is a black-brown crystal powder, which dissolves in concentrated sulfuric acid with a greenish color. When heated, the color changes to purple. The dye is somewhat soluble in alcohol with a brown color, in water it dissolves very easily with a red-brown color. It creates yellowish brown tones on the wool fiber.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE122930X | 1925-05-22 | ||
CH120527T | 1926-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH122930A true CH122930A (en) | 1927-10-17 |
Family
ID=25709492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH122930D CH122930A (en) | 1925-05-22 | 1926-05-19 | Process for the preparation of a new dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH122930A (en) |
-
1926
- 1926-05-19 CH CH122930D patent/CH122930A/en unknown
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