CH252290A - Process for the preparation of a polyazo dye. - Google Patents
Process for the preparation of a polyazo dye.Info
- Publication number
- CH252290A CH252290A CH252290DA CH252290A CH 252290 A CH252290 A CH 252290A CH 252290D A CH252290D A CH 252290DA CH 252290 A CH252290 A CH 252290A
- Authority
- CH
- Switzerland
- Prior art keywords
- mol
- dye
- acid
- hand
- sulphonic acid
- 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. 246985. Verfahren zur Herstellung eines Polyazofarbstoffes. Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines Polyazo- farbstoffes. Das Verfahren ist dadurch ge kennzeichnet,
dass man die diazotlerte Amino- azoverbindung 4-Amino-diphenyl-4'-azo-sali- cylsäure in alkalischem Medium mit dem Disazofarbstoff vereinigt, der erhältlich ist durch Kuppeln von 1 Mol tetrazotierter 1- Oxy-2,
6-diamino-benzol-4-sulfonsäure einer seits mit 1 Mol 2-Acetylamino-5-oxy-naph- thalin-7-sulfonsäure und anderseits mit 1 Mol Resorcin. Der neue Farbstoff bildet ein dunkles Pulver, welches sich in Wasser mit brauner und in konzentrierter Schwefelsäure mit vio letter Farbe döst. Cellulosefasern werden in braunen Tönen angefärbt.
Durch Nachkup- ferung werden die Nass- und Lichtechtheit verbessert.
<I>Beispiel:</I> 20,4 Teile 1-Oxy-2,6-diamino-benzol-4-sul- fonsäure werden in salzsaurer Lösung mit 13,8 Teilen Natriumnitrit tetrazotiert, die überschüssige Mineralsäure mit Natriumace- tat abgestumpft und bei Gegenwart von über schüssigem Natriumacetat mit einer neutra len Lösung von 28,1 Teilen 2-Acetylamino- 5-oxy-naphthalin-7-sdfonsäure zum Zwi schenprodukt vereinigt.
Nach mehreren Stun den wird weitergekuppelt, indem man eine Lösung von 11 Teilen Resorcin, 40 Teilen Soda in 400 Teilen Wasser zum Zwischen produkt zufliessen lässt. Nach einigen Stun den wird der gebildete Disazofarbstoff mit Kochsalz gefällt, abgesaugt und mit .Sole resorcinfrei gewaschen. Dann wird mit dem Zwischenprodukt, erhalten aus 18,4 Teilen tetrazotiertem Benzidin und 13,8 Teilen Sali- cylssäure, weitergekuppelt.
Am andern Mor gen ist die Kupplung beendet. Durch Zu gabe von Kochsalz wird die Farbstoffällung vervollständigt. Man filtriert und trocknet.
<B> Additional patent </B> to main patent no. 246985. Process for the production of a polyazo dye. The present patent relates to a process for the production of a polyazo dye. The procedure is characterized by
that the diazotized amino-azo compound 4-amino-diphenyl-4'-azo-salicylic acid is combined in an alkaline medium with the disazo dye, which is obtainable by coupling 1 mol of tetrazotized 1-oxy-2,
6-diamino-benzene-4-sulphonic acid on the one hand with 1 mol of 2-acetylamino-5-oxy-naphthalene-7-sulphonic acid and on the other hand with 1 mol of resorcinol. The new dye forms a dark powder, which dozes in water with brown and in concentrated sulfuric acid with violet color. Cellulose fibers are colored in brown tones.
The wet and light fastness are improved by re-coppering.
<I> Example: </I> 20.4 parts of 1-oxy-2,6-diamino-benzene-4-sulphonic acid are tetrazotized with 13.8 parts of sodium nitrite in a hydrochloric acid solution, and the excess mineral acid is truncated with sodium acetate and in the presence of excess sodium acetate combined with a neutral solution of 28.1 parts of 2-acetylamino-5-oxy-naphthalene-7-sdfonic acid to form the intermediate product.
After several hours, the coupling is continued by allowing a solution of 11 parts of resorcinol, 40 parts of soda in 400 parts of water to flow into the intermediate product. After a few hours, the disazo dye formed is precipitated with sodium chloride, filtered off with suction and washed free of resorcinol with brine. Then the intermediate product, obtained from 18.4 parts of tetrazotised benzidine and 13.8 parts of salicylic acid, is coupled further.
The next morning the clutch is over. The dye precipitation is completed by adding table salt. Filter and dry.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH252290T | 1945-11-09 | ||
CH246985T | 1945-11-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH252290A true CH252290A (en) | 1947-12-15 |
Family
ID=25729164
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH252290D CH252290A (en) | 1945-11-09 | 1945-11-09 | Process for the preparation of a polyazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH252290A (en) |
-
1945
- 1945-11-09 CH CH252290D patent/CH252290A/en unknown
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