AT72639B - Process for the preparation of blue tetrakisazo dyes. - Google Patents
Process for the preparation of blue tetrakisazo dyes.Info
- Publication number
- AT72639B AT72639B AT72639DA AT72639B AT 72639 B AT72639 B AT 72639B AT 72639D A AT72639D A AT 72639DA AT 72639 B AT72639 B AT 72639B
- Authority
- AT
- Austria
- Prior art keywords
- blue
- preparation
- coupling
- dyes
- tetrakisazo dyes
- Prior art date
Links
- 239000000975 dye Substances 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims 2
- MTJGVAJYTOXFJH-UHFFFAOYSA-N 3-aminonaphthalene-1,5-disulfonic acid Chemical compound C1=CC=C(S(O)(=O)=O)C2=CC(N)=CC(S(O)(=O)=O)=C21 MTJGVAJYTOXFJH-UHFFFAOYSA-N 0.000 claims 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- 238000004043 dyeing Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 150000008049 diazo compounds Chemical class 0.000 description 1
- 238000006193 diazotization reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
Landscapes
- Coloring (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Darstellung blauer Tetrakisazofarbstoffe.
Dem bekannten Verfahren zur Herstellung waschechter Färbungen durch Kupplung eines geeigneten Farbstoffes auf der Faser mit einer Diazoverbindung oder nach erfolgter Diazotierung mit einer Azokomponento wird die Nachbehandlung hiefür geeigneter Färbungen mit Formaldehyd der Einfachheit wegen vorgezogen. Wenngleich eine grössere Zahl von Farbstoffen bekannt geworden ist, deren Färbungen durch eine Nachbehandlung mit Formaldehyd genügend waschecht werden, so besitzen die derart behandelten Färbungen in sehr vielen Fällen eine ungenügende Lichtechtheit, da die Lichtechtheit der direkten Färbungen im allgemeinen durch die Nachbehandlung mit Formaldehyd herabgesetzt wird.
Besonders war es bisher nicht gelungen, nach diesem Verfahren gleichzeitig in hohem Grade wasch- und lichtechte blaue Färbungen herzustellen.
Den Gegenstand vorliegender Erfindung bildet ein Verfahren zur Darstellung von Farbstoffen, die, auf Baumwolle gefärbt und mit Formaldehyd nach behandelt, nicht nur waschechte, sondern auch hervorragend lichtechte, blaue Färbungen liefern. Die Farbstoffe entsprechen dem Schema:
EMI1.1
-7-sulfosäure zu verstehen ist.
Beispiel : Der nach dem Beispiel der deutschen Patentschrift Nr. 163321 dar-
EMI1.2
EMI1.3
farbt Baumwolle rötlichblau.
In Anlehnung an dieses Beispiel stellt man ähnliche Farbstoffe her, indem man die Reilenfolge der Mittelkomponente andett oder sie durch andere ersetzt.
EMI1.4
einen noch etwas @ötlicheren Farbstoff.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for the preparation of blue tetrakisazo dyes.
For the sake of simplicity, the after-treatment for suitable dyeings with formaldehyde is preferred to the known process for producing washfast dyeings by coupling a suitable dye to the fiber with a diazo compound or after diazotization with an azo component. Although a large number of dyestuffs have become known, the colorations of which are sufficiently washfast after treatment with formaldehyde, the colorations treated in this way have in very many cases insufficient lightfastness, since the lightfastness of the direct colorations is generally reduced by the after-treatment with formaldehyde .
In particular, it has not been possible to use this process to produce blue dyeings that are both washable and lightfast at the same time.
The subject matter of the present invention is a process for the preparation of dyes which, when dyed on cotton and treated with formaldehyde, give not only washfast but also excellent lightfast blue colorations. The dyes correspond to the scheme:
EMI1.1
-7-sulfonic acid is to be understood.
Example: The example shown in German patent specification No. 163321
EMI1.2
EMI1.3
colors cotton reddish blue.
Based on this example, similar dyes are produced by adding the sequence of the middle component or by replacing them with others.
EMI1.4
an even more reddish dye.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE72639X | 1914-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT72639B true AT72639B (en) | 1916-10-25 |
Family
ID=5636209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT72639D AT72639B (en) | 1914-10-29 | 1915-10-21 | Process for the preparation of blue tetrakisazo dyes. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT72639B (en) |
-
1915
- 1915-10-21 AT AT72639D patent/AT72639B/en active
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