AT72639B - Process for the preparation of blue tetrakisazo dyes. - Google Patents

Process for the preparation of blue tetrakisazo dyes.

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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
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AT
Austria
Prior art keywords
blue
preparation
coupling
dyes
tetrakisazo dyes
Prior art date
Application number
Other languages
German (de)
Original Assignee
Anilin Fabrikation Ag
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Publication date
Application filed by Anilin Fabrikation Ag filed Critical Anilin Fabrikation Ag
Application granted granted Critical
Publication of AT72639B publication Critical patent/AT72639B/en

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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)

PATENT-ANSPRUCH: Verfahren zur Darstellung blauer Tetrakisazofarbstoffe, darin bestehend, dass man 2-Naphtylamin-4.8-disulfosäure diazotiert, mit einer Mittelkomponente kuppelt, das Zwischen- produkt weiterdiazotiert, mit einer Mittelkomponente kuppelt, wieder weiterdiazotiert, mit einer Mittelkomponente kuppelt, erneuert diazotiert und mit Resorcin kuppelt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of blue tetrakisazo dyes, which consists in diazotizing 2-naphthylamine-4,8-disulfonic acid, coupling it with a central component, further diazotizing the intermediate, coupling it with a central component, further diazotising it, coupling it with a central component, renewing it diazotising it and coupling it with resorcinol . ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT72639D 1914-10-29 1915-10-21 Process for the preparation of blue tetrakisazo dyes. AT72639B (en)

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

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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)

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