CH265414A - Process for the preparation of a stilbene dye. - Google Patents
Process for the preparation of a stilbene dye.Info
- Publication number
- CH265414A CH265414A CH265414DA CH265414A CH 265414 A CH265414 A CH 265414A CH 265414D A CH265414D A CH 265414DA CH 265414 A CH265414 A CH 265414A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- yellow
- parts
- wool
- water
- 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
- C09B56/00—Azo dyes containing other chromophoric systems
- C09B56/04—Stilbene-azo dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 260575. Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines Stilben- farbstoffes. Das Verfahren ist dadurch ge- kennzeichnet, dass ein Nitrostilben-bis-triazol der Formel
EMI0001.0005
mit Dehydrothio-p-toluidinsulfonsäure in alkalischem Medium kondensiert wird. Der neue Farbstoff stellt ein gelbes Pulver dar, das sich in Wasser mit gelber Farbe löst und Cellulosefasern in gelben Tönen von guter Wasser-, Wasch- und Lichtechtheit färbt.
Der Farbstoff ist, da er Wolle praktisch vollkom men weiss lässt, besonders auch für das Fär ben von Halbwolle sehr wertvoll. Durch Nachbehandeln mit Kupfer- oder Chrom salzen werden die Nassechtheiten noch ver bessert.
<I>Beispiel:</I> 40 Teile diazotierte 4,4'-Nitroamino-stilben- 2,2'-disulfonsäure werden mit 35 Teilen 5 -Amino - 2- (4'-oxy-3'-carboxy-5'-sulfophenyl) - 1,3-benztriazol gekuppelt. Der rote Farbstoff wird abfiltriert, in 3000 bis 4000 Teilen heissem Wasser mit Ammoniak gelöst und mit einer Lösung von 60 Teilen kristallisiertem Kupfersulfat und 120 Teilen konzentriertem Ammoniak bei 95-98 oxydiert.
Der Kupfer komplex des Bistriazols wird durch Erhitzen mit Salzsäure aufgespalten; nach dem Isolie ren erhält man das Nitrostilben-bis-triazol als gelbe Substanz.
75,9 Teile dieser Verbindung und 32 Teile Dehydrothio-p-toluidinsulfonsäure werden in 1.500 Teilen Wasser und 500 Teilen Natron lauge 36 B6 18 Stunden unter Rückfluss kon densiert. Das schwerlösliche Kondensations produkt wird abfiltriert und getrocknet. Der Farbstoff stellt ein gelbes Pulver dar.
<B> Additional patent </B> to main patent no. 260575. The subject of the present patent is a process for the production of a stilbene dye. The process is characterized in that a nitrostilbene-bis-triazole of the formula
EMI0001.0005
is condensed with dehydrothio-p-toluidinesulfonic acid in an alkaline medium. The new dye is a yellow powder that dissolves in water with a yellow color and dyes cellulose fibers in yellow shades of good water, washing and lightfastness.
As it leaves wool practically completely white, the dye is particularly valuable for dyeing half wool. Subsequent treatment with copper or chrome salts improves the wet fastness properties.
<I> Example: </I> 40 parts of diazotized 4,4'-nitroamino-stilbene-2,2'-disulfonic acid are mixed with 35 parts of 5-amino-2- (4'-oxy-3'-carboxy-5 ' -sulfophenyl) - 1,3-benzotriazole coupled. The red dye is filtered off, dissolved in 3,000 to 4,000 parts of hot water with ammonia and oxidized at 95-98 with a solution of 60 parts of crystallized copper sulfate and 120 parts of concentrated ammonia.
The copper complex of the bistriazole is broken down by heating with hydrochloric acid; after isolating ren, nitrostilbene-bis-triazole is obtained as a yellow substance.
75.9 parts of this compound and 32 parts of dehydrothio-p-toluidinesulfonic acid are condensed under reflux for 18 hours in 1,500 parts of water and 500 parts of sodium hydroxide solution 36 B6. The sparingly soluble condensation product is filtered off and dried. The dye is a yellow powder.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH260575T | 1944-11-24 | ||
CH265414T | 1944-11-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH265414A true CH265414A (en) | 1949-11-30 |
Family
ID=25730313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH265414D CH265414A (en) | 1944-11-24 | 1944-11-24 | Process for the preparation of a stilbene dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH265414A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2989527A (en) * | 1957-02-01 | 1961-06-20 | Hickson & Welch Ltd | Pyrazolo and indazolo triazolyl stilbene disulfonic acids |
-
1944
- 1944-11-24 CH CH265414D patent/CH265414A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2989527A (en) * | 1957-02-01 | 1961-06-20 | Hickson & Welch Ltd | Pyrazolo and indazolo triazolyl stilbene disulfonic acids |
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