CH184491A - Process for the preparation of a carbocyanine dye. - Google Patents

Process for the preparation of a carbocyanine dye.

Info

Publication number
CH184491A
CH184491A CH184491DA CH184491A CH 184491 A CH184491 A CH 184491A CH 184491D A CH184491D A CH 184491DA CH 184491 A CH184491 A CH 184491A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
carbocyanine dye
condensed
carbocyanine
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 CH184491A publication Critical patent/CH184491A/en

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C11/00—Synchronisation of independently-driven clocks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Anti-Oxidant Or Stabilizer Compositions (AREA)

Description

  

  Verfahren zur Herstellung eines     Carbocyaninfarbstoffes.       Gegenstand des vorliegenden Zusatzpa  tentes ist ein     Verfahren    zur Herstellung eines       Carbocyaninfarbstoffes,    welches dadurch ge  kennzeichnet ist, dass man 1. 3     .3-Trimethyl-          iridolin-2-methylen-co-aldehyd    mit     Dihydro-a-          methylindol    in Gegenwart eines Kondensa  tionsmittels, welches Salzsäure zu liefern  vermag, kondensiert.  



  <I>Beispiel:</I>  20,1 Gewichtsteile     1.3.3-Trimethylindo-          lin-2-methylen-w-aldehyd    werden mit 13,3  Gewichtsteilen     Dihydro-a-methylindol    in 100  Gewichtsteilen Benzol gelöst und durch Zu  tropfen von 6 Gewichtsteilen     Phosphoroxy-          chlorid    bei     15-200    C bis zur     Farbstoffbil-          dung    kondensiert. Der nach Abtreiben des  Benzols zurückbleibende Farbstoff wird in  heissem Wasser gelöst, woraus er sich beim       Abkühlen    wieder ausscheidet.

   Der so erhal  tene Farbstoff färbt     tannierte    Baumwolle in  gelben Tönen von hervorragender Klarheit  und guter Lichtechtheit.



  Process for the preparation of a carbocyanine dye. The subject of the present additional patent is a process for the production of a carbocyanine dye, which is characterized in that 1. 3 .3-trimethyl-iridoline-2-methylene-co-aldehyde with dihydro-a-methylindole in the presence of a condensation agent, which hydrochloric acid is able to deliver, condenses.



  <I> Example: </I> 20.1 parts by weight of 1,3.3-trimethylindoline-2-methylene-w-aldehyde are dissolved with 13.3 parts by weight of dihydro-α-methylindole in 100 parts by weight of benzene and 6 is added dropwise Parts by weight of phosphorus oxychloride condensed at 15-200 C until dye formation. The dye that remains after the benzene has been driven off is dissolved in hot water, from which it precipitates again on cooling.

   The dyestuff obtained in this way dyes tannic cotton in yellow shades of excellent clarity and good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Carbo- cyaninfarbstoifes, dadurch gekennzeichnet, dass man 1.3.3.-Trimethylindolin-2-methylen-co- aldehyd mit Dihydro-a-methylindol in Gegen wart eines Kondensationsmittels, welches Salzsäure zu liefern vermag, kondensiert. Der so erhaltene Farbstoff färbt tannierte Baumwolle in gelben Tönen von hervorragen der Klarheit und guter Lichtechtheit. PATENT CLAIM: Process for the production of a carbocyanine dye, characterized in that 1.3.3.-trimethylindoline-2-methylene-coaldehyde is condensed with dihydro-α-methylindole in the presence of a condensing agent which can deliver hydrochloric acid. The dye thus obtained dyes tannin cotton in yellow shades of excellent clarity and good lightfastness. UNTERANSPRUCH: Verfahren nach Patentänspruch, dadurch gekennzeichnet, dass man die Reaktionskom ponenten in Benzol löst und durch Zutropfen von Phosphoroxychlorid bei etwa 15-20 C bis zur Farbstoffbildung kondensiert. SUBCLAIM: Process according to patent claim, characterized in that the reaction components are dissolved in benzene and condensed by adding dropwise phosphorus oxychloride at about 15-20 ° C. until the dye is formed.
CH184491D 1933-12-16 1934-12-14 Process for the preparation of a carbocyanine dye. CH184491A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE184491X 1933-12-16
CH179452T 1934-05-15

Publications (1)

Publication Number Publication Date
CH184491A true CH184491A (en) 1936-05-31

Family

ID=25720313

Family Applications (1)

Application Number Title Priority Date Filing Date
CH184491D CH184491A (en) 1933-12-16 1934-12-14 Process for the preparation of a carbocyanine dye.

Country Status (1)

Country Link
CH (1) CH184491A (en)

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