CH90848A - Process for the preparation of a chromable o-oxydisazo dye. - Google Patents
Process for the preparation of a chromable o-oxydisazo dye.Info
- Publication number
- CH90848A CH90848A CH90848DA CH90848A CH 90848 A CH90848 A CH 90848A CH 90848D A CH90848D A CH 90848DA CH 90848 A CH90848 A CH 90848A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxydisazo
- dye
- preparation
- parts
- chromable
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Coloring (AREA)
Description
Verfahren zur Darstellaug eines ebromierbaren o-Oxydisazofarbstoffes. Im Hauptpatent wurde ein Verfahren zur Darstellung eines chromierbaren o-Oxydisazö- farbstoffes beschrieben, darin bestehend, dass han diazotiertes 4-Nitro-2-aminopheiiol in alkalischer Lösung mit 2-Amino-5-iiaphtol- 7-sulfosäure kuppelt, das Zwischenprodukt weiter diazotiert und mit Aethylbenzylanilin- 4'-sulfosäure vereinigt.
In diesem Verfahren lässt sich die End- komponente durch Methylbenzylaiiilin-4'-sulfo- säure ersetzen, wobei man einen sehr ähnlichen 'Farbstoff erhält, dessen Färbung auf Wolle nachchromiert tief schwarz ist und sich durch vorzügliche, Licht-, Wasch- und Walkechtheit auszeichnet.
Beispiel: 15,4 Teile 4-Nitio-2-aminopheilol werden mit 50 Teilen Salzsäure von 120 B6 Lind 6,9 Teilen Natriumnitrit diazotiert und mit 24 Teile 2-Ainino-5-paphtol-7-sulfosäure in sodaalkälischer Lösung gekuppelt. Das aus geschiedene und abgesaugte Zwischenprodukt wird mit 700 Teilen Wasser verrührt und nach Zugabe von<B>7</B> Teilen Natriumnitrit und Eis und Eingiessen von 70 Teilen Salzsäure von 12' B6 2 Stunden bei 00 gerührt. Die erhaltene Diazoverbindung fliesst in eine Lösung von 30 Teilen Methylbenzylaniliii-4'-salfosätire und 40 Teilen wasserfreiem Natriumkarbonat in 500 Teilen Wasser. Nach einigem Rühren scheidet man den gebildeten DiazofaAstoff ab. Er färbt Wolle in saurem Bade tr.üb violett; beim Nachchromieren geht die Fär bung in ein tiefes Schwarz über.
Process for the preparation of an ebrominatable o-oxydisazo dye. In the main patent, a process for the preparation of a chromable o-oxydisazo dye was described, consisting in coupling diazotized 4-nitro-2-aminopheiiol in alkaline solution with 2-amino-5-iiaphthol-7-sulfonic acid, further diazotizing the intermediate and combined with ethylbenzylaniline-4'-sulfonic acid.
In this process, the end component can be replaced by methylbenzylbenzylin-4'-sulfonic acid, a very similar dye being obtained, the color of which is deep black when chromed on wool and is characterized by excellent fastness to light, washing and milling .
Example: 15.4 parts of 4-nitio-2-aminopheilol are diazotized with 50 parts of hydrochloric acid of 120 B6 and 6.9 parts of sodium nitrite and coupled with 24 parts of 2-amino-5-paphthol-7-sulfonic acid in a solution of soda-alkali. The separated and filtered intermediate product is stirred with 700 parts of water and, after adding 7 parts of sodium nitrite and ice and pouring in 70 parts of hydrochloric acid of 12 B6, stirred at 00 for 2 hours. The diazo compound obtained flows into a solution of 30 parts of methylbenzylaniliii-4'-salfosätire and 40 parts of anhydrous sodium carbonate in 500 parts of water. After some stirring, the diazo fiber formed is separated off. It dyes wool in an acidic bath with a dull purple; when chromium plating, the color changes to a deep black.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE74077X | 1915-07-28 | ||
CH88563T | 1920-06-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH90848A true CH90848A (en) | 1921-10-01 |
Family
ID=25703857
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH90848D CH90848A (en) | 1915-07-28 | 1920-06-18 | Process for the preparation of a chromable o-oxydisazo dye. |
CH90849D CH90849A (en) | 1915-07-28 | 1920-06-18 | Process for the preparation of a chromable o-oxydisazo dye. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH90849D CH90849A (en) | 1915-07-28 | 1920-06-18 | Process for the preparation of a chromable o-oxydisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (2) | CH90848A (en) |
-
1920
- 1920-06-18 CH CH90848D patent/CH90848A/en unknown
- 1920-06-18 CH CH90849D patent/CH90849A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CH90849A (en) | 1921-10-01 |
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