CH148016A - Process for the preparation of a direct disazo dye. - Google Patents
Process for the preparation of a direct disazo dye.Info
- Publication number
- CH148016A CH148016A CH148016DA CH148016A CH 148016 A CH148016 A CH 148016A CH 148016D A CH148016D A CH 148016DA CH 148016 A CH148016 A CH 148016A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- direct
- color
- preparation
- violet
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines direkt ziehenden Disazofarbstofies. Es wurde gefunden, dass man einen neuen, direkt ziehenden Disazofarbstoff erhält, wenn man tetrazotiertes 3,3'-Diamino-4,4'- dioxy-5,5'-dimethyl-diphenylsulfon mit 2 Molekülen Phenyl-2-amino-5-naphtol-7-sulfo- säure kuppelt.
<I>Beispiel:</I> 31 Teile 3,3'-Diamino-4,4'-dioxy-5,5'-di- methyl-diphenylsulfon werden salzsauer un ter Zusatz von Eis mit 14 Teilen Natrium nitrit tetrazotiert und mit 64 Teilen Phenyl- 2-amino=5-naphtol-7-sulfosäure sodaalkalisch gekuppelt. Man lässt 24 Stunden rühren, er wärmt und salzt aus.
Der getrocki.ete Farbstoff ist ein dunkel- bronziges Pulver, das sich in Wasser mit blauvioletter, in Schwefelsäure mit rot violetter Farbe löst. Er lässt sich auf Baum wolle direkt färben als Bordeauxrosa und geht beim Behandeln mit Kupfersulfat in Violett über. Denselben -Farbton erreicht man, wenn man das Kupfersalz des Farb- stoffes verwendet. Die Ausfärbung ist von hervorragender Licht- und guter Wasch echtheit.
Process for the preparation of a direct disazo dye. It has been found that a new, direct disazo dye is obtained when tetrazotized 3,3'-diamino-4,4'-dioxy-5,5'-dimethyl-diphenylsulfone with 2 molecules of phenyl-2-amino-5- Naphthol-7-sulfonic acid couples.
<I> Example: </I> 31 parts of 3,3'-diamino-4,4'-dioxy-5,5'-dimethyl-diphenylsulfone are tetrazotized with 14 parts of sodium nitrite and with hydrochloric acid with the addition of ice 64 parts of phenyl-2-amino = 5-naphthol-7-sulfonic acid coupled with alkaline soda. It is left to stir for 24 hours, it is warmed up and salted out.
The dried dye is a dark bronze powder that dissolves in water with a blue-violet color and in sulfuric acid with a red-violet color. It can be dyed directly on cotton as burgundy pink and turns purple when treated with copper sulphate. The same color shade can be achieved if the copper salt of the dye is used. The color is extremely lightfast and washfast.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE148016X | 1928-11-15 | ||
| CH145155T | 1929-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH148016A true CH148016A (en) | 1931-06-30 |
Family
ID=25714628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH148016D CH148016A (en) | 1928-11-15 | 1929-11-14 | Process for the preparation of a direct disazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH148016A (en) |
-
1929
- 1929-11-14 CH CH148016D patent/CH148016A/en unknown
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