CH234963A - Process for the preparation of a polymethine dye. - Google Patents

Process for the preparation of a polymethine dye.

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Publication number
CH234963A
CH234963A CH234963DA CH234963A CH 234963 A CH234963 A CH 234963A CH 234963D A CH234963D A CH 234963DA CH 234963 A CH234963 A CH 234963A
Authority
CH
Switzerland
Prior art keywords
preparation
polymethine dye
dye
methylsulfonylindoline
benzaldehyde
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 CH234963A publication Critical patent/CH234963A/en

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Description

  

  Verfahren zur Herstellung eines     Polymethinfarbstoffes.       Gegenstand dieses Patentes ist ein Ver  fahren zur Herstellung eines     Polymethinfarb-          stoffes,    welches dadurch gekennzeichnet ist,  dass man     1.3.3-Trimethyl-2-methylen-5-me-          thylsulfonylindolin    mit 4 - (N -     Methyl    - 4'     -          äthoxyphenyl)    -     amino    -     benzaldehyd    konden  siert.  



       Beispiel:     251 Gewichtsteile     1.3.3-Trimethyl-2-me-          thylen-5-methylsulfonylindolin    und 255 Ge  wichtsteile     4-(N-Methyl-4'-äthoxyphenyl)-          amino-benzaldehyd    werden in 600 Gewichts  teilen Eisessig mehrere Stunden auf 70 bis  80  C erhitzt. Nach beendeter     Farbstoffbil-          dung    wird die Lösung in starke Phosphor  säure gegeben und mit saurem     Natriumphos-          phat        ausgesalzen.    Der Farbstoff kristalli  siert in dunklen glänzenden Schuppen.

   Er  löst sich leicht in Wasser     und    färbt     Zellu-          loseester        und        -äther    in violetten Tönen, die  sich durch gute Lichtechtheit     auszeichnen.       Das als Ausgangsstoff     verwendete        Indo-          linderivat    kann aus     p-Aminophenylmethyl-          sulfon    nach bekanntem Verfahren hergestellt  werden. Es ist ein zähes<B>01</B> vom     Kp."5    235 bis  237  C, das sich nach kurzer Zeit rötlich  färbt.



  Process for the preparation of a polymethine dye. The subject of this patent is a process for the production of a polymethine dye, which is characterized in that 1,3.3-trimethyl-2-methylene-5-methylsulfonylindoline with 4 - (N - methyl - 4 '- ethoxyphenyl) - Amino-benzaldehyde condenses.



       Example: 251 parts by weight of 1,3.3-trimethyl-2-methylene-5-methylsulfonylindoline and 255 parts by weight of 4- (N-methyl-4'-ethoxyphenyl) -amino-benzaldehyde are in 600 parts by weight of glacial acetic acid to 70 to several hours 80 C heated. When the dye has formed, the solution is poured into strong phosphoric acid and salted out with acidic sodium phosphate. The dye crystallizes in dark, shiny scales.

   It dissolves easily in water and colors cellulose esters and ethers in violet tones, which are characterized by good lightfastness. The indoline derivative used as the starting material can be prepared from p-aminophenylmethylsulfone by a known process. It is a tough <B> 01 </B> with bp "5 235 to 237 C, which turns reddish after a short time.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Poly- methinfarbstoffes, dadurch gekennzeichnet, dass man 1.3.3-Trimethyl-2-methylen-5-me- thylsulfonylindolin mit 4 - (N - Methyl - 4' äthogyphenyl) - amino - benzaldehyd konden siert. Der neue Farbstoff bildet dunkle glän zende Schuppen. Er löst sich leicht in Was ser und färbt Zelluloseester und -ä,ther in vio letten Tönen. Die Färbungen zeichnen sich durch gute Lichtechtheit aus. PATENT CLAIM: Process for the production of a polymethine dye, characterized in that 1,3.3-trimethyl-2-methylene-5-methylsulfonylindoline is condensed with 4 - (N-methyl-4'ethogyphenyl) -amino-benzaldehyde. The new dye forms dark, shiny scales. It dissolves easily in water and colors cellulose esters and ethers in violet shades. The dyeings are distinguished by their good lightfastness.
CH234963D 1940-10-21 1941-12-02 Process for the preparation of a polymethine dye. CH234963A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE234963X 1940-10-21
CH232375T 1941-12-02

Publications (1)

Publication Number Publication Date
CH234963A true CH234963A (en) 1944-10-31

Family

ID=25727708

Family Applications (1)

Application Number Title Priority Date Filing Date
CH234963D CH234963A (en) 1940-10-21 1941-12-02 Process for the preparation of a polymethine dye.

Country Status (1)

Country Link
CH (1) CH234963A (en)

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