CH249554A - Process for the preparation of a polyazo dye. - Google Patents
Process for the preparation of a polyazo dye.Info
- Publication number
- CH249554A CH249554A CH249554DA CH249554A CH 249554 A CH249554 A CH 249554A CH 249554D A CH249554D A CH 249554DA CH 249554 A CH249554 A CH 249554A
- Authority
- CH
- Switzerland
- Prior art keywords
- mol
- dye
- preparation
- brown
- polyazo dye
- 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 Hauptpatent 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 tetrazotiertes 4,4'-Diamino - 3,
3'- dimethyl - diphenyl einer seits mit 1 Mol des Monoazofarbstoffes aus diazotierter 2-Amino-l-ogy-benzol-4-sulfon- säur6 und Resorcin und anderseits mit 1 Mol 3-Methyl-5-pyrazolon kuppelt. Der entstan dene neue Trisazofarbstoff stellt ein dunkles Pulver dar, das sich in Wasser mit brauner und in konzentrierter Schwefelsäure mit roter Farbe löst.
Er färbt Fasern aus natür licher und regenerierter Cellulose in braunen Tönen, die beim Behandeln mit Kupfersalzen in der Nuance nur wenig verändert, in den Echtheitseigenschaften jedoch erheblich ver bessert werden.
<I>Beispiel:</I> 21,2 Teile 4,4' - Diamino - 3,3' - dimethyl- diphenyl werden in bekannter Weise mit 13,8 Teilen Natriumnitrit tetrazotiert und in Gegenwart von 15 Teilen Natriumacetat mit einer lackmussauren wässrigen Lösung von 31 Teilen des Monoazofarbstoffes, erhalten durch Kuppeln von diazotierter 2-Amino-l- oxy-benzol-4-sulfonsäure mit Resorcin, ver- einigt.
Durch Zutropfen von verdünnter Sodalösung wird die Suspension schwach lackmussauer gehalten. Sobald kein Tetrazo- dimethyl-diphenyl mehr nachweisbar ist, kuppelt man in Gegenwart von Natrium carbonat mit 9,8 Teilen 3-Methyl-5-pyr- azolon. Der fertig gebildete Trisazofarbstoff wird abfiltriert und zetrocknet.
<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 - 3,
3'-dimethyl - diphenyl on the one hand with 1 mol of the monoazo dye from diazotized 2-amino-l-ogy-benzene-4-sulfonic acid6 and resorcinol and on the other hand with 1 mol of 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 a red color.
It dyes fibers made of natural and regenerated cellulose in brown tones, the shade of which changes only slightly when treated with copper salts, but the fastness properties are considerably improved.
<I> Example: </I> 21.2 parts of 4,4'-diamino-3,3'-dimethyldiphenyl are tetrazotized in a known manner with 13.8 parts of sodium nitrite and, in the presence of 15 parts of sodium acetate, with an aqueous lacquer acid Solution of 31 parts of the monoazo dye, obtained by coupling diazotized 2-amino-oxy-benzene-4-sulfonic acid with resorcinol, combined.
The suspension is kept slightly walled by the addition of dilute soda solution. As soon as tetrazodimethyl-diphenyl is no longer detectable, coupling is carried out in the presence of sodium carbonate with 9.8 parts of 3-methyl-5-pyrazolone. The completely formed trisazo dye is filtered off and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH244602T | 1945-05-16 | ||
CH249554T | 1945-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH249554A true CH249554A (en) | 1947-06-30 |
Family
ID=25728960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH249554D CH249554A (en) | 1945-05-16 | 1945-05-16 | Process for the preparation of a polyazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH249554A (en) |
-
1945
- 1945-05-16 CH CH249554D patent/CH249554A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH250816A (en) | Process for the preparation of a new copper-compatible polyazo dye. | |
CH249554A (en) | Process for the preparation of a polyazo dye. | |
CH249548A (en) | Process for the preparation of a polyazo dye. | |
CH249550A (en) | Process for the preparation of a polyazo dye. | |
CH252289A (en) | Process for the preparation of a polyazo dye. | |
CH195533A (en) | Process for the preparation of a pentakisazo dye. | |
CH252287A (en) | Process for the preparation of a polyazo dye. | |
CH191566A (en) | Process for the preparation of a pentakisazo dye. | |
CH249553A (en) | Process for the preparation of a polyazo dye. | |
CH209104A (en) | Process for the preparation of a green trisazo dye. | |
CH252290A (en) | Process for the preparation of a polyazo dye. | |
CH93580A (en) | Process for the production of a new azo dye. | |
CH244515A (en) | Process for the preparation of an azo dye. | |
CH249551A (en) | Process for the preparation of a polyazo dye. | |
CH201188A (en) | Process for the preparation of a tetrakisazo dye. | |
CH249555A (en) | Process for the preparation of a polyazo dye. | |
CH249549A (en) | Process for the preparation of a polyazo dye. | |
CH324389A (en) | Process for the production of a metallizable polyazo dye | |
CH243001A (en) | Process for the preparation of a copper-compatible polyazo dye. | |
CH244516A (en) | Process for the production of a metallizable polyazo dye. | |
CH252286A (en) | Process for the preparation of a polyazo dye. | |
CH179448A (en) | Process for the preparation of a new trisazo dye. | |
CH195534A (en) | Process for the preparation of a pentakisazo dye. | |
CH243002A (en) | Process for the preparation of a copper-compatible polyazo dye. | |
CH244775A (en) | Process for the preparation of a new trisazo dye. |