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CH189311A - Process for the preparation of a water-soluble, basic triphenylmethane dye. - Google Patents

Process for the preparation of a water-soluble, basic triphenylmethane dye.

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Publication number
CH189311A
CH189311A CH189311DA CH189311A CH 189311 A CH189311 A CH 189311A CH 189311D A CH189311D A CH 189311DA CH 189311 A CH189311 A CH 189311A
Authority
CH
Switzerland
Prior art keywords
water
soluble
preparation
dye
toluidine
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 CH189311A publication Critical patent/CH189311A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines wasserlöslichen, basischen     Triphenylmethanfarbstoffes.       Gegenstand vorliegender Erfindung ist  ein Verfahren zur Darstellung eines wasser  löslichen, basischen     Triphenylmethanfarb-          stoffes,    welches dadurch gekennzeichnet ist,  dass man die durch Kondensation von 1     Mol          p-Chlorbenzaldehyd    mit 2     Mol        Di-(methox-          äthyl)-m-toluidin    und Oxydation erhältliche       tetra-all,oxyalkylierte        Diamino-triphenylme-          thanverbindung,

      die in     p-Stellung    zur     Car-          binolkohlenstoffatom    ein Chloratom enthält,  mit     p-Toluidin    verschmilzt, bis kein Grün  mehr vorhanden ist.  



  <I>Beispiel:</I>  Die durch schwefelsaure Kondensation  von     p-Chlorbenzaldehyd    mit     Di-(methox-          äthyl)-m-toluidin    erhaltene     Leukoverbindung     wird in der üblichen Art und Weise mit Blei  superoxyd zu einem grünen Farbstoff oxy  diert. 30 Gewichtsteile dieses grünen Farb  stoffes werden mit 40 Gewichtsteilen     p-To-          luidin    bei etwa 120   C so lange verschmol  zen, bis kein Grün mehr vorhanden ist.

   Die  Umsetzung dauert     etwa    3 bis 4     Stunden.     Nach Entfernung des überschüssigen     p-To-          luidins    erhält man einen Farbstoff, der sich    sehr leicht in Wasser löst und     tannierte     Baumwolle, Wolle und Seide in leuchtend       grünstichig    blauen Tönen von hervorragen  der Lichtechtheit färbt.



  Process for the preparation of a water-soluble, basic triphenylmethane dye. The present invention relates to a process for the preparation of a water-soluble, basic triphenylmethane dye, which is characterized in that one obtainable by condensation of 1 mole of p-chlorobenzaldehyde with 2 moles of di (methoxethyl) -m-toluidine and oxidation tetra-all, oxyalkylated diamino-triphenylmethane compound,

      which contains a chlorine atom in the p-position to the carbinol carbon atom, fuses with p-toluidine until there is no more green.



  <I> Example: </I> The leuco compound obtained by sulfuric acid condensation of p-chlorobenzaldehyde with di- (methoxy-ethyl) -m-toluidine is oxidized in the usual way with lead superoxide to form a green dye. 30 parts by weight of this green dye are fused with 40 parts by weight of p-toluidine at about 120 C until there is no more green.

   The reaction takes about 3 to 4 hours. After removing the excess p-toluidine, a dye is obtained which dissolves very easily in water and dyes tannic cotton, wool and silk in bright greenish blue shades of excellent lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines wasser löslichen, basischen Triphenylmethanfarb- stoffes, dadurch gekennzeichnet, dass man die durch Kondensation von 1 Mol p-Chlorbenz- aldehyd mit 2 Mol Di-(methoxäthyl)-m-to- luidin und Oxydation erhältliche tetraalkoxy- alkylierte Diamino-triphenylmethanverbin- dung, PATENT CLAIM: Process for the preparation of a water-soluble, basic triphenylmethane dye, characterized in that the tetraalkoxy obtained by condensation of 1 mole of p-chlorobenzaldehyde with 2 moles of di- (methoxethyl) -m-toluidine and oxidation is alkylated Diamino-triphenylmethane compound, die in p-Stellung zum Carbinolkohlen- stoffatom ein Chloratom enthält, mit p-To- luidin verschmilzt, bis kein Grün mehr vor handen ist. Der so erhältliche Farbstoff ist sehr leicht in Wasser löslich und färbt tannierte Baumwolle, Wolle und Seide in leuchtend grünstichig blauen Tönen von hervorragen der Lichtechtheit. which contains a chlorine atom in the p-position to the carbinol carbon atom, fuses with p-toluidine until there is no more green. The dye which can be obtained in this way is very easily soluble in water and dyes tannin cotton, wool and silk in bright greenish blue tones with excellent lightfastness.
CH189311D 1934-06-30 1935-06-29 Process for the preparation of a water-soluble, basic triphenylmethane dye. CH189311A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE189311X 1934-06-30
CH184614T 1935-06-29

Publications (1)

Publication Number Publication Date
CH189311A true CH189311A (en) 1937-02-15

Family

ID=25721049

Family Applications (1)

Application Number Title Priority Date Filing Date
CH189311D CH189311A (en) 1934-06-30 1935-06-29 Process for the preparation of a water-soluble, basic triphenylmethane dye.

Country Status (1)

Country Link
CH (1) CH189311A (en)

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