CH234965A - Process for the preparation of a polymethine dye. - Google Patents

Process for the preparation of a polymethine dye.

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Publication number
CH234965A
CH234965A CH234965DA CH234965A CH 234965 A CH234965 A CH 234965A CH 234965D A CH234965D A CH 234965DA CH 234965 A CH234965 A CH 234965A
Authority
CH
Switzerland
Prior art keywords
preparation
polymethine dye
dye
trifluoromethylsulfonylindoline
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 CH234965A publication Critical patent/CH234965A/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-tri-          fluormethylsulfonylindolin    mit     4-(N-Äthyl-          butyl)-amino-2-methyl-benzaldehyd    konden  siert.  



  <I>Beispiel:</I>  305 Gewichtsteile     1.3.3-Trimethyl-2-me-          thylen-5-trifluormethylsulfonylindolin    und  219 Gewichtsteile     4-(N-Äthyl-butyl)-amino-          2-methylbenzaldehyd    werden in 900 Ge  wichtsteilen Eisessig auf 70 bis 80  C erhitzt,  bis die     Farbstoffbildung    beendet ist. Dann  wird die Lösung des Farbstoffes in starke       Salzsäurelösung    gegeben und mit Natrium  chlorid     ausgesalzen.    Der Farbstoff kristalli  siert in bronzierenden Schuppen.

   Er ist leicht  in Wasser löslich und färbt     Zelluloseester    und       -äther    in einem     rotstichigen    Blau von guten       Nassechtheiten    und guter Lichtechtheit. Das    angewandte     Indolinderivat    kann nach be  kanntem Verfahren aus     4-Aminophenyltri-          fluormethylsulfon    hergestellt werden. Es  ist ein     ül    vom     gp,    176 bis     179 C,    das sich  schon nach kurzer Zeit rot 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-trifluoromethylsulfonylindoline with 4- (N-ethyl-butyl) -amino-2 -methyl-benzaldehyde condenses.



  <I> Example: </I> 305 parts by weight of 1,3.3-trimethyl-2-methylene-5-trifluoromethylsulfonylindoline and 219 parts by weight of 4- (N-ethyl-butyl) -amino-2-methylbenzaldehyde in 900 parts by weight of glacial acetic acid heated to 70 to 80 C until dye formation has ended. Then the solution of the dye is poured into a strong hydrochloric acid solution and salted out with sodium chloride. The dye crystallizes in bronzing scales.

   It is easily soluble in water and dyes cellulose esters and ethers in a reddish blue with good wet fastness and good light fastness. The indoline derivative used can be prepared from 4-aminophenyltrifluoromethylsulfone by known processes. It is a ül from gp, 176 to 179 C, which turns red after a short time.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Poly- methinfarbstoffes, dadurch gekennzeichnet, dass man 1.3.3-Trimethyl-2-methylen-5-tri- fluormethylsulfonylindolin mit 4-(N-Äthyl- butyl)-amino-2-methyl-benzaldehyd konden siert. Der neue Farbstoff bildet bronzierende Schuppen. Er ist leicht in Wasser löslich und färbt Zelluloseester und -äther in einem rotstichigen Blau von guten Nassechtheiten und guter Lichtechtheit. PATENT CLAIM: Process for the production of a polymethine dye, characterized in that 1,3.3-trimethyl-2-methylene-5-trifluoromethylsulfonylindoline is condensed with 4- (N-ethylbutyl) -amino-2-methylbenzaldehyde . The new dye forms bronzing scales. It is easily soluble in water and dyes cellulose esters and ethers in a reddish blue with good wet fastness and good light fastness.
CH234965D 1940-10-21 1941-12-02 Process for the preparation of a polymethine dye. CH234965A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE234965X 1940-10-21
CH232375T 1941-12-02

Publications (1)

Publication Number Publication Date
CH234965A true CH234965A (en) 1944-10-31

Family

ID=25727710

Family Applications (1)

Application Number Title Priority Date Filing Date
CH234965D CH234965A (en) 1940-10-21 1941-12-02 Process for the preparation of a polymethine dye.

Country Status (1)

Country Link
CH (1) CH234965A (en)

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