CH197482A - Process for the preparation of a polymethine dye. - Google Patents

Process for the preparation of a polymethine dye.

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Publication number
CH197482A
CH197482A CH197482DA CH197482A CH 197482 A CH197482 A CH 197482A CH 197482D A CH197482D A CH 197482DA CH 197482 A CH197482 A CH 197482A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
phenetidine
polymethine dye
water
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 CH197482A publication Critical patent/CH197482A/en

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Description

  

  Verfahren zur Herstellung eines     PolymethinfarbstofPes.       In der Hauptanmeldung ist ein Verfah  ren zur Herstellung eines neuen     Polymethin-          farbstoffes    beschrieben, bei dem man     1,3,3-          Trimethyl-2-methylenindolin-co-aldehyd    in  Gegenwart eines sauren Kondensationsmittels  mit     p-Phenylendiamin    umsetzt.  



  Es wurde nun gefunden, dass     tnan    eben  falls einen neuen wertvollen     Polymethinfarb-          stoff    erhält, wenn man     1,3,3-Trimethyl-2-          methylenindolin-co-aldehyd    in Gegenwart  eines sauren Kondensationsmittels mit     p-          Phenetidin    umsetzt.  



  Der neue Farbstoff ähnelt den basischen       Triphenylmethanfarbstoffen    der     Auraminreihe.     Er ist gut wasserlöslich und zeichnet sich  durch ausgezeichnete Klarheit und sehr gute  Lichtechtheit seiner Färbungen aus. Durch       Sulfonierung    kann man den     Farbstoff    in  einen wertvollen sauren Farbstoff überführen.    21 Teilen     1,3,3-Trimethyl-2-methylenicidolin-          o)-aldehyd    versetzt und     '/s    Stunde lang auf  <B>950</B> C erwärmt. Der nach dem Erkalten der  Lösung auskristallisierte     Farbstoff    wird ab  gesaugt, mit wenig Wasser gewaschen und  getrocknet.

   Er färbt tannierte Baumwolle  in reinen grüngelben Tönen von guter     Licht-          echtbeit.  



  Process for the preparation of a polymethine dye. In the main application, a method for producing a new polymethine dye is described in which 1,3,3-trimethyl-2-methyleneindoline-co-aldehyde is reacted with p-phenylenediamine in the presence of an acidic condensing agent.



  It has now been found that a new, valuable polymethine dye is also obtained if 1,3,3-trimethyl-2-methyleneindoline-co-aldehyde is reacted with p-phenetidine in the presence of an acidic condensing agent.



  The new dye is similar to the basic triphenylmethane dyes of the auramine series. It is readily soluble in water and its dyeings are characterized by excellent clarity and very good lightfastness. The dye can be converted into a valuable acidic dye by sulfonation. 21 parts of 1,3,3-trimethyl-2-methylenicidolin- o) -aldehyde are added and the mixture is heated to 950 ° C. for an hour. The dye which crystallizes out after the solution has cooled is filtered off with suction, washed with a little water and dried.

   It dyes tannic cotton in pure green-yellow tones with good light-fastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Polyme- thinfarbstoffes, dadurch gekennzeichnet, dass man 1,3,3-Trimethyl-2-metbylenindolin-cu- aldehyd in Gegenwart eines sauren Konden sationsmittels mit p-Phenetidin umsetzt. Der neue Farbstoff ist gut wasserlöslich. Er färbt tannierte Baumwolle in reinen grün gelben Tönen von guter Lichtechtheit. Durch Sulfonierung kann man ihn in einen wert vollen sauren Farbstoff überführen. Claim: A process for the production of a polymer dyestuff, characterized in that 1,3,3-trimethyl-2-metbylenedoline-cu- aldehyde is reacted with p-phenetidine in the presence of an acidic condensation agent. The new dye is readily soluble in water. It dyes tannin cotton in pure green-yellow shades of good lightfastness. It can be converted into a valuable acidic dye by sulfonation. Beispiel; Eine Lösung von 21 Teilen salzsaurem p-Phenetidin in 200 Teilen Wasser wird mit Example; A solution of 21 parts of hydrochloric acid p-phenetidine in 200 parts of water is mixed with
CH197482D 1935-08-16 1936-07-07 Process for the preparation of a polymethine dye. CH197482A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE197482X 1935-08-16
CH193625T 1936-07-07

Publications (1)

Publication Number Publication Date
CH197482A true CH197482A (en) 1938-04-30

Family

ID=25722555

Family Applications (1)

Application Number Title Priority Date Filing Date
CH197482D CH197482A (en) 1935-08-16 1936-07-07 Process for the preparation of a polymethine dye.

Country Status (1)

Country Link
CH (1) CH197482A (en)

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