CH249548A - Process for the preparation of a polyazo dye. - Google Patents
Process for the preparation of a polyazo dye.Info
- Publication number
- CH249548A CH249548A CH249548DA CH249548A CH 249548 A CH249548 A CH 249548A CH 249548D A CH249548D A CH 249548DA CH 249548 A CH249548 A CH 249548A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- mol
- polyazo dye
- preparation
- brown
- 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
- C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
- C09B35/38—Trisazo dyes ot the type
- C09B35/40—Trisazo dyes ot the type the component K being a dihydroxy or polyhydroxy compound
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatsnt Nr. 244602. Verfahren zur Herstellung eines Polyazofarbstoffes. Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines Polyazo- farbstoffes. Das Verfahren ist dadurch ge kennzeichnet, dass man 1 Mol tetrazotierten 4,
4' - Diamino - diphenylharnstoff einerseits mit 1 Mol des Monoazofarbstoffes aus diazo- tierter 2-Amino-l-oxy-benzol-4-sulfonsäure und Resorcin und anderseits mit 3-Methyl-5- pyrazolon kuppelt. Der entstandene neue Trisazofarbstoff stellt ein dunkles Pulver dar, das sich in Wasser mit brauner und in konzentrierter Schwefelsäure mit orange roter Farbe löst.
Er färbt Cellulosefasern in gelbbraunen Tönen, welche beim Behandeln mit Kupferverbindungen die Nuance nur un wesentlich ändern, in den Echtheitseigen schaften jedoch erheblich verbessert werden. Beispiel:
24,2 Teile 4,4'-Diamino-diphenylharnstoff werden in Gegenwart von 45 Teilen Salz säure mit 13,8 Teilen Natriumnitrit tetra- zotiert und in schwach essigsaurer Suspen sion mit einer wässerigen Lösung von 31,0 Teilen des Monoazofarbstoffes aus diazotier- ter 2-Amino-l-oxy-benzol-4-sulfonsäure und Resorcin vereinigt.
Sobald kein Tetrazo- diphenylharnstoff mehr nachgewiesen wer den kann, kuppelt man in Gegenwart von Natriumbiearbonat mit einer neutralen wässe rigen Lösung von 9,8 Teilen 3-Methyl-5-pyr- azolon. Nach 12 Stunden wird filtriert und getrocknet.
<B> Additional patent </B> to main patent no. 244602. Process for the production of a polyazo dye. The present patent relates to a process for the production of a polyazo dye. The process is characterized in that 1 mol of tetrazotized 4,
4 '- diamino - diphenylurea on the one hand with 1 mol of the monoazo dye from diazo - tated 2-amino-1-oxy-benzene-4-sulfonic acid and resorcinol and on the other hand with 3-methyl-5-pyrazolone. The resulting new trisazo dye is a dark powder that dissolves in water with a brown color and in concentrated sulfuric acid with an orange-red color.
It dyes cellulose fibers in yellow-brown tones, which change the shade only un essential when treated with copper compounds, but the fastness properties are considerably improved. Example:
24.2 parts of 4,4'-diaminodiphenylurea are tetrazotized with 13.8 parts of sodium nitrite in the presence of 45 parts of hydrochloric acid and diazotized in weakly acetic acid suspension with an aqueous solution of 31.0 parts of the monoazo dye 2-Amino-1-oxy-benzene-4-sulfonic acid and resorcinol combined.
As soon as no more tetrazodiphenylurea can be detected, coupling is carried out in the presence of sodium carbonate with a neutral aqueous solution of 9.8 parts of 3-methyl-5-pyrazolone. After 12 hours, it is filtered and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH244602T | 1945-05-16 | ||
CH249548T | 1945-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH249548A true CH249548A (en) | 1947-06-30 |
Family
ID=25728954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH249548D CH249548A (en) | 1945-05-16 | 1945-05-16 | Process for the preparation of a polyazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH249548A (en) |
-
1945
- 1945-05-16 CH CH249548D patent/CH249548A/en unknown
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