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CH197484A - Process for the preparation of a polymethine dye. - Google Patents

Process for the preparation of a polymethine dye.

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Publication number
CH197484A
CH197484A CH197484DA CH197484A CH 197484 A CH197484 A CH 197484A CH 197484D A CH197484D A CH 197484DA CH 197484 A CH197484 A CH 197484A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
polymethine dye
acidic
trimethyl
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 CH197484A publication Critical patent/CH197484A/en

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Description

  

  Verfahren zur Herstellung eines     Polymethinfarbstoifes.       In der Hauptanmeldung ist ein Verfahren  zur     Tierstellung    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 man eben  falls einen neuen wertvollen     Polymethinfarb-          stoff    erhält, wenn man     1,3,3-Trimethyl-2-ine-          thylenindolin-co-aldehyd    in     Gegenwart-'eines     sauren Kondensationsmittels mit     4,4'-Diä-          thoxydiphenylamin    umsetzt.  



  Der neue Farbstoff ähnelt     den.-:äsiscben          Triphenylmethanfarbstoffen    der     Auräminreibe.     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.

      <I>Beispiel:</I>    Zu einer Lösung von 13 Teilen     4,4'-          Diäthoxydiphenylamin    und 10,5 Teilen     1,3,3-          Trimethyl-2-methylenindolin-co-aldehyd    in  90 Teilen Benzol lässt man 8 Teile Phosphor-         oxyehlorid    zulaufen, wobei die Temperatur  auf etwa 40   C ansteigt. Nach einstündigem  Rühren trägt man die Mischung in 200 Teile  Wasser ein und treibt das Benzol mit Was  serdampf ab. Die     Farbstofflösung    wird heiss  filtriert und der nach dem Erkalten aus  kristallisierte Farbstoff abgesaugt, mit Koch  salzlösung gewaschen und im Vakuum ge  trocknet. Er färbt tannierte Baumwolle in  gelben Tönen von sehr guter Lichtechtheit.



  Process for the preparation of a polymethine dye. The main application describes a process for producing a new polymethine dye, 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-inethyleneindoline-co-aldehyde is used in the presence of an acidic condensing agent with 4,4'-diet - Reacts thoxydiphenylamine.



  The new dye is similar to the triphenyl methane dyes of the auric grater. 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.

      <I> Example: </I> 8 parts of phosphorus are added to a solution of 13 parts of 4,4'-diethoxydiphenylamine and 10.5 parts of 1,3,3-trimethyl-2-methyleneindoline-co-aldehyde in 90 parts of benzene - Oxyehlorid run in, whereby the temperature rises to about 40 C. After stirring for one hour, the mixture is introduced into 200 parts of water and the benzene is driven off with steam. The dye solution is filtered hot and the dye which has crystallized out after cooling is filtered off with suction, washed with sodium chloride solution and dried in vacuo. It dyes tannin cotton in yellow shades of very good lightfastness.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Polyme- thinfarbstoffes, dadurch gekennzeichnet, dass man. 1,3,3-Trimethyl- 2-metbylenindolin-co- afdehyd in Gegenwart eines sauren Konden sationsmittels mit 4,4'-Diäthoxydiphenylamin umsetzt. Der Färbstoff ist gut wasserlöslich. Er färbt tannierte Baumwolle in klaren gelben Tönen von sehr guter Lichtechtheit. Durch Sulfonierung kann man ihn in einen wert vollen sauren Farbstoff überführen. PATENT CLAIM: Process for the production of a polymer thin dye, characterized in that one. 1,3,3-Trimethyl-2-metbylenindoline-co-afdehyde in the presence of an acidic condensation agent with 4,4'-diethoxydiphenylamine. The dye is readily soluble in water. It dyes tannin cotton in clear yellow shades of very good lightfastness. It can be converted into a valuable acidic dye by sulfonation.
CH197484D 1935-08-16 1936-07-07 Process for the preparation of a polymethine dye. CH197484A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE197484X 1935-08-16
CH193625T 1936-07-07

Publications (1)

Publication Number Publication Date
CH197484A true CH197484A (en) 1938-04-30

Family

ID=25722557

Family Applications (1)

Application Number Title Priority Date Filing Date
CH197484D CH197484A (en) 1935-08-16 1936-07-07 Process for the preparation of a polymethine dye.

Country Status (1)

Country Link
CH (1) CH197484A (en)

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