CH209104A - Process for the preparation of a green trisazo dye. - Google Patents
Process for the preparation of a green trisazo dye.Info
- Publication number
- CH209104A CH209104A CH209104DA CH209104A CH 209104 A CH209104 A CH 209104A CH 209104D A CH209104D A CH 209104DA CH 209104 A CH209104 A CH 209104A
- Authority
- CH
- Switzerland
- Prior art keywords
- molecule
- green
- preparation
- dye
- trisazo 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
- C09B35/44—Trisazo dyes ot the type the component K being a hydroxy amine
- C09B35/46—Trisazo dyes ot the type the component K being a hydroxy amine the component K being an amino naphthol
- C09B35/463—D being derived from diaminodiphenyl
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 203693. Verfahren zur Darstellung eines grünen Trisazofarbstoffes. Das vorliegende Patent betrifft ein Ver fahren zur Herstellung eines zum Färben von Leder verschiedenster Gerbungsart be sonders geeigneten, gut eindringenden und egalisierenden, gegen Säure und Alkali prak tisch unempfindlichen grünen Trisazofarb- stoffes und ist dadurch gekennzeichnet,
dass man ein Molekül Tetrazobenzidin in essig saurer Lösung mit einem Molekül 1.8- Aminonaphtol-4. 6-disulfonsäure kombiniert, das Zwischenprodukt mit einem Molekül Di- azobenzol-p-sulfonsäure in sodaalkalischer Lösung kuppelt und hierauf mit einem Mole kül Acetessiganilid vereinigt.
Beispiel: 18,4 Teile Benzidin werden tetrazotiert und in die schwach mineralsaure Tetrazo- lösunb eine mit Natriumacetat und etwas Essigsäure versetzte Lösung von 34,1 Teilen 1.8-Aminonaphtol-4.6-disulfonsäure (Mono natriumsalz) langsam zugegeben. Nach be endigter Bildung des Monoazofarbstoffes macht man die Kupplungsflüssigkeit soda- alkalisch und lässt die Diazoverbindung aus 17,3 Teilen Aminobenzol-p-sulfonsäure zu fliessen.
Nach vollendeter Kupplung versetzt man die Disazozwischenverbindung mit einer gekühlten ätzalkalischen Lösung von 17,7 Tei len Acetessigsäureanilid, worauf unter Grün färbung rasch Kupplung zum Trisazofarb- stoff erfolgt.
Der neue Farbstoff wird durch vorsichtiges Aussalzen der angesäuerten Kupplungsflüssigkeit ausgefällt und stellt nach dem Trocknen ein grauschwarzes, etwas bronzierendes Pulver dar, das sich in Wasser mit tiefgrüner Farbe löst und auf Leder ver schiedenster Gerbungsart tiefdunkelgrüne Färbungen ergibt.
Additional patent to main patent no. 203693. Process for the preparation of a green trisazo dye. The present patent relates to a process for the production of a green trisazo dye which is particularly suitable for dyeing leather of various types of tanning, which penetrates and levels out, is practically insensitive to acid and alkali and is characterized by:
that one molecule of tetrazobenzidine in acetic acid solution with one molecule of 1,8-aminonaphtol-4. 6-disulfonic acid combined, the intermediate product coupled with a molecule of diazobenzene-p-sulfonic acid in a soda-alkaline solution and then combined with a molecule of acetoacetanilide.
Example: 18.4 parts of benzidine are tetrazotized and a solution of 34.1 parts of 1,8-aminonaphthol-4,6-disulfonic acid (monosodium salt), mixed with sodium acetate and a little acetic acid, is slowly added to the weakly mineral acidic tetrazo solution. When the formation of the monoazo dye has ended, the coupling liquid is made alkaline with soda and the diazo compound is allowed to flow from 17.3 parts of aminobenzene-p-sulfonic acid.
After the coupling is complete, the disazo intermediate compound is mixed with a cooled, caustic solution of 17.7 parts of acetoacetic anilide, whereupon coupling to the trisazo dye takes place rapidly, turning green.
The new dye is precipitated by carefully salting out the acidified coupling fluid and, after drying, is a gray-black, somewhat bronzing powder that dissolves in water with a deep green color and produces deep dark green colorations on leather of various types of tanning.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH203693T | 1938-03-05 | ||
CH209104T | 1938-03-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH209104A true CH209104A (en) | 1940-03-15 |
Family
ID=25723965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH209104D CH209104A (en) | 1938-03-05 | 1938-03-05 | Process for the preparation of a green trisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH209104A (en) |
-
1938
- 1938-03-05 CH CH209104D patent/CH209104A/en unknown
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