CH149715A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

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Publication number
CH149715A
CH149715A CH149715DA CH149715A CH 149715 A CH149715 A CH 149715A CH 149715D A CH149715D A CH 149715DA CH 149715 A CH149715 A CH 149715A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
vat
vat dye
dyes
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH149715A publication Critical patent/CH149715A/en

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Description

  

  Verfahren zur Darstellung eines     Nüpenfarbstoifes.       Es wurde gefunden, dass durch Konden  sation von     6-Alkoxy-3-oxy-l-thionaphtenen     mit substituierten     Isatinen    von folgender  Formel:  
EMI0001.0004     
    a = Halogen oder     Alkyl;     b = Halogen,     Alkyl    oder Wasserstoff;  c     =    Halogen,     Alkyl    oder Wasserstoff;  klar orange färbende sehr echte     Küpenfarb-          stoffe    erhalten werden.

      Die Farbstoffe zeichnen sieh durch reine  Farbtöne     und        durch    besondere Lichtechtheit  aus, welche die Lichtechtheit der hochwer  tigen, orange färbenden     güpenfarbstoffe    der       Anthrachinonreihe    teilweise sogar erreicht.  Die neuen Farbstoffe     eignen    sich mit Vorteil  für den Zeugdruck. Für die Kondensation    sind die bekannten     Ausführungsformen    an  wendbar.  



  Gegenstand dieses Patentes ist ein Ver  fahren zur Darstellung eines     Küpenfarb-          stoffes,    welches dadurch gekennzeichnet ist,  dass man     6-Methoxy-3-oxythionaphten    mit  5.     7-Dichlorisatin    kondensiert.    <I>Beispiel:</I>  18 Gewichtsteile     6-Methoxy-3-oxythio-          naphten    werden in 200 Gewichtsteilen Eis       essig    oder     Essigsäureanhydrid    unter Erwär  men gelöst und mit einer Lösung von 22 Ge  wichtsteilen 5.     7-Dichlorisatin    in 200 Ge  wichtsteilen Eisessig vereinigt.

   Nach Zugabe  von etwas konzentrierter Salzsäure fällt  der     6-Methoxy-2-thionaphten-5'-7'-dichlor-3'-          indolindigo    aus der heissen Lösung in kristal  liner Form aus. Durch kurzes     Nachrühren     auf dem Dampfbad wird die     Farbstoffbii-          dung    beendet. Der Farbstoff wird nach dem  Erkalten der Lösung abgesaugt, mit Eisessig      und alsdann mit Wasser gewaschen. Er färbt  aus gelber     Küpe    die Faser in klaren orange  farbigen Tönen von guter Wasch-, Koch- und       Lichtechtheit    an.



  Process for the representation of a nub dye. It has been found that condensation of 6-alkoxy-3-oxy-l-thionaphtenes with substituted isatins of the following formula:
EMI0001.0004
    a = halogen or alkyl; b = halogen, alkyl or hydrogen; c = halogen, alkyl or hydrogen; very genuine vat dyes that give clear orange color are obtained.

      The dyes are characterized by pure shades and special lightfastness, which in some cases even achieves the lightfastness of the high-quality, orange-colored quality dyes of the anthraquinone series. The new dyes are advantageously suitable for stuff printing. The known embodiments can be used for the condensation.



  The subject of this patent is a process for the preparation of a vat dye which is characterized in that 6-methoxy-3-oxythionaphthene is condensed with 5, 7-dichloroisatin. <I> Example: </I> 18 parts by weight of 6-methoxy-3-oxythio- naphthene are dissolved in 200 parts by weight of glacial acetic acid or acetic anhydride with heating and mixed with a solution of 22 parts by weight of 5,7-dichloroisatin in 200 parts by weight of glacial acetic acid united.

   After adding a little concentrated hydrochloric acid, the 6-methoxy-2-thionaphthene-5'-7'-dichloro-3'-indolindigo precipitates out of the hot solution in crystalline form. The dye formation is ended by briefly stirring on the steam bath. After the solution has cooled, the dye is filtered off with suction, washed with glacial acetic acid and then with water. He dyes the fiber from a yellow vat in clear orange shades of good washing, boiling and lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes, welches dadurch gekennzeichnet ist, dass man 6-11lethoxy-3-oxythionaphten mit 5 . 7-Dichlorisatin kondensiert. Der so erhaltene Farbstoff färbt aus gel ber Küpe die Faser in klaren orangefarbigen Tönen von guter Wasch-, Koch- und Licht echtheit an. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kondensation in Gegenwart von Eisessig als Lösungsmittel ausführt. PATENT CLAIM: Process for the preparation of a vat dye, which is characterized in that 6-11lethoxy-3-oxythionaphthene is mixed with 5. 7-dichloroisatin condensed. The dye obtained in this way dyes the fiber from a yellow vat in clear orange tones of good fastness to washing, cooking and light. SUBCLAIM: Process according to claim, characterized in that the condensation is carried out in the presence of glacial acetic acid as solvent.
CH149715D 1929-09-25 1930-09-24 Process for the preparation of a vat dye. CH149715A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE149715X 1929-09-25

Publications (1)

Publication Number Publication Date
CH149715A true CH149715A (en) 1931-09-30

Family

ID=5673498

Family Applications (1)

Application Number Title Priority Date Filing Date
CH149715D CH149715A (en) 1929-09-25 1930-09-24 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH149715A (en)

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