CH252296A - Process for the preparation of a disazo dye. - Google Patents
Process for the preparation of a disazo dye.Info
- Publication number
- CH252296A CH252296A CH252296DA CH252296A CH 252296 A CH252296 A CH 252296A CH 252296D A CH252296D A CH 252296DA CH 252296 A CH252296 A CH 252296A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- dye
- yellow
- disazo dye
- preparation
- 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
- C09B43/00—Preparation of azo dyes from other azo compounds
- C09B43/12—Preparation of azo dyes from other azo compounds by acylation of amino groups
- C09B43/136—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents
- C09B43/14—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents with phosgene or thiophosgene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr.<B>246986.</B> Verfahren zur Herstellung eines Disazofarbstoffes. Das vorliegende Patent betrifft ein Ver fahren zur Herstellung eines Disazofarbstof- fes und ist dadurch gekennzeichnet, dass der durch Kuppeln von 4-Diazo-6-sulfosalicyl- säure auf 2,
5-Dimethyl-l-aminobenzol erhält liche Aminoazofarbstoff durch Behandeln mit Phosgen in das Harnstoffderivat über geführt wird.
<I>Beispiel:</I> Der aus der Diazoverbindung von 23,3 Teilen 4-Amino-6-sulfosalicylsäure und 12,1 Teilen 2,5-Dimethyl-l-aminobenzol durch Kuppeln hergestellte Aminoazofarbstoff wird in 1000 Teilen heissem Wasser unter Zusatz von überschüssiger Soda gelöst, durch Filtra tion geklärt und bei neutraler, schwach alka lischer oder essigsaurer Reaktion so lange mit Phosgen behandelt, bis er ;sich völlig in das Harnstoffderivat verwandelt hat, wel ches sich aus der Lösung abscheidet. Hierauf wird filtriert und getrocknet. Der neue Farb stoff stellt ein bräunlichgelbes Pulver dar.
Er löst sich in Wasser mit gelber, in konzen- trierter Schwefelsäure mit roter Farbe und färbt Baumwolle und regenerierte Cellulose in gelben, rein weiss ätzbaren Tönen, welche beim Nachbehandeln mit Kupferformiat und nassechtheitsverbessernden, hochmolekularen, wasserlöslichen Basen voller und gut wasch-, Wasser- und lichtecht werden.
Additional patent to main patent no. <B> 246986. </B> Process for the production of a disazo dye. The present patent relates to a process for the production of a disazo dye and is characterized in that the by coupling of 4-diazo-6-sulfosalicylic acid to 2,
5-Dimethyl-1-aminobenzene is obtained Liche aminoazo dye by treatment with phosgene in the urea derivative.
<I> Example: </I> The aminoazo dye produced by coupling the diazo compound of 23.3 parts of 4-amino-6-sulfosalicylic acid and 12.1 parts of 2,5-dimethyl-l-aminobenzene is poured into 1000 parts of hot water Addition of excess soda, clarified by filtration and treated with phosgene in a neutral, weakly alkaline or acetic acid reaction until it has completely transformed into the urea derivative, which separates out of the solution. It is then filtered and dried. The new dye is a brownish-yellow powder.
It dissolves in water with a yellow color, in concentrated sulfuric acid with a red color and dyes cotton and regenerated cellulose in yellow, pure white etchable shades, which when treated with copper formate and high-molecular, water-soluble bases, are full and easily washable. and become lightfast.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH252296T | 1946-01-14 | ||
CH246986T | 1946-01-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH252296A true CH252296A (en) | 1947-12-15 |
Family
ID=25729170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH252296D CH252296A (en) | 1946-01-14 | 1946-01-14 | Process for the preparation of a disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH252296A (en) |
-
1946
- 1946-01-14 CH CH252296D patent/CH252296A/en unknown
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