CH196349A - Process for the preparation of a new chromable disazo dye. - Google Patents
Process for the preparation of a new chromable disazo dye.Info
- Publication number
- CH196349A CH196349A CH196349DA CH196349A CH 196349 A CH196349 A CH 196349A CH 196349D A CH196349D A CH 196349DA CH 196349 A CH196349 A CH 196349A
- Authority
- CH
- Switzerland
- Prior art keywords
- new
- dye
- chromable
- disazo dye
- amino
- 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
- C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
- C09B33/02—Disazo dyes
- C09B33/04—Disazo dyes in which the coupling component is a dihydroxy or polyhydroxy compound
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen chromierbaren Disazofarbstoffes. Es wurde gefunden, dass man einen neuen, sehr wertvollen chromierbaren Disazofarb- stoff erhält, wenn man 1;3-Dioxybenzol, diazotiertes 1-Oxy-2-,amino-4,6-@dinitrobenzol und diazotierte '2-Amino-l-methylbenzol-5- sulfonsäure aufeinander einwirken lässt. Der so erhaltene Farbstoff kann g4wünschtenfallo mit chromabgebenden Mitteln behandelt wer den.
Der nasch dem, vorliegenden Verfahren hergestellte Farbstoff eignet sich besonders zum Färben von Wolle und Leder. Die nachchromierten Färbungen -auf Wolle und die Färbungen mit der komplexen Chrom verbindung des Farbstoffes auf Leder zeigen sehr gute Echtheitseigenschaften. Der ohrom- haltige Farbstoff kann auch .zum Färben von natürlicher Seide oder Viskose dienen.
<I>Beispiel:</I> Man vereinigt die Diazoverbindung von 19,9 Teilen 1-Oxy-2=amino-4,6-@dinitrobenzol mit einer wässrigen Lösung von 11 Teilen 1,3-Dioxybenzol. Durch Zugeben von über schüssigem Natriumacetat wird die Kupp lung zu Ende geführt. Dann .gibt man die Diazoverbindung aus 18,7 Teilen 2-Amino-l- methylbenzol-15-,
sulfoneäure zu einer Goda- alkalis chen Lösung des erhaltenen Monoazo- farbstoffes. Der nach dem Aufarbeiten er hältliche Disazofarbstoff liefert auf Wolle beim Nachbehandeln mit Bichromat echte braune Färbungen.
Den ;gleichen Farbstoff erhält man, wenn man zuerst ,die Diazoverbindung der 2-Amino- 1-methylbenzol-5-sulfonssiäure mit 1,3-Dioxy- benzol umsetzt und ,dann den erhaltenen Monoazofarb@stoff mit diazotiertem 1-Oxy-2- amino-4;6-dinitrobenzol umsetzt.
Um die komplexe Chromverbindung 4er- zustellen, löst man den Dissazofarbstoff in etwa 500 bis 600 Teilen Wasser und kocht ihn einige Zeit lang mit einer Chromformiat- lösung,deren Gehalt 9,2 Teilen CrzQ ent- spricht. Der ehromhaltige -Farbstoff wird dann ausgesalzen, abgesaugt und getrocknet.
Er färbt Leder in braunen Tönen und be sitzt eine vorzügliche Licht-, Wasch-. Säure- und Alkaliechtheit und @Säurebestäiidigheit. Auf Seide liefert der Farbstoff echte braune Färbungen von guter Wasserechtheit.
Process for the preparation of a new chromable disazo dye. It has been found that a new, very valuable chromable disazo dye is obtained if 1; 3-dioxybenzene, diazotized 1-oxy-2-, amino-4,6- @ dinitrobenzene and diazotized '2-amino-1- methylbenzene-5-sulfonic acid interacts. The dye obtained in this way can, if desired, be treated with chromium donating agents.
The dye produced by the present process is particularly suitable for dyeing wool and leather. The post-chromed dyeings on wool and the dyeings with the complex chromium compound of the dye on leather show very good fastness properties. The ear-containing dye can also be used to dye natural silk or viscose.
<I> Example: </I> The diazo compound of 19.9 parts of 1-oxy-2 = amino-4,6- @ dinitrobenzene is combined with an aqueous solution of 11 parts of 1,3-dioxybenzene. The coupling is brought to an end by adding excess sodium acetate. Then give the diazo compound from 18.7 parts of 2-amino-1-methylbenzene-15-,
sulfonic acid to form a Goda-alkaline solution of the monoazo dye obtained. The disazo dye, which is available after working up, gives real brown dyeings on wool when treated with bichromate.
The same dye is obtained if the diazo compound of 2-amino-1-methylbenzene-5-sulfonic acid is first reacted with 1,3-dioxybenzene and then the monoazo dye obtained is reacted with diazotized 1-oxy-2- amino-4; 6-dinitrobenzene converts.
To create the complex chromium compound 4, the dissazo dye is dissolved in about 500 to 600 parts of water and boiled for some time with a chromium formate solution, the content of which corresponds to 9.2 parts of CrzQ. The Ehrom -haltige dye is then salted out, filtered off with suction and dried.
It dyes leather in brown tones and has excellent lighting and washing. Acid and alkali fastness and acid resistance. The dye provides real brown dyeings with good waterfastness on silk.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE196349X | 1936-05-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH196349A true CH196349A (en) | 1938-03-15 |
Family
ID=5754274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH196349D CH196349A (en) | 1936-05-09 | 1937-03-18 | Process for the preparation of a new chromable disazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH196349A (en) |
-
1937
- 1937-03-18 CH CH196349D patent/CH196349A/en unknown
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