CH192764A - Process for the preparation of a polymethine dye. - Google Patents

Process for the preparation of a polymethine dye.

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Publication number
CH192764A
CH192764A CH192764DA CH192764A CH 192764 A CH192764 A CH 192764A CH 192764D A CH192764D A CH 192764DA CH 192764 A CH192764 A CH 192764A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
polymethine dye
weight
parts
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 CH192764A publication Critical patent/CH192764A/en

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Description

       

  Verfahren zur Darstellung eines     Polymethinfarbstofes.       Gegenstand     dieses.        Zusatzpatentes    ist ein  Verfahren zur Darstellung eines     Polym-ethin-          farbstoffes,    welches dadurch gekennzeichnet  ist,     dass    man     1,3,

  3-TrimetUyl-5-methoxyindo-          lin-2-methylen-co-a1.dehyd    mit     Tetrahydro-          chinolin        kondensiert    und den so     erhaltenen          basischen    Farbstoff mit einem     sulfierenden          Mittel        behandelt.       <I>Beispiel:

  </I>  23     Gewichtsteile    1,3,3-Trimethyl-5-me-         thoxyindolin-2-methylen-co-aldehyd    werden  mit 13,3 Gewichtsteilen     Tetrahydrochinolin     in 100 Gewichtsteilen Benzol     gelöst    und  durch     Zutropfen    von 16 Gewichtsteilen     Phos-          phoroxychlorid    bei etwa 15 bis 20   C bis zur       Farbstoffbildung        kondensiert.     



  10 Gewichtsteile des so erhältlichen Stof  fes, der aus.     Wasser    in goldglänzenden     Nädel-          chen    kristallisiert werden kann, werden in  50     Gewichtsteilen        Schwefelsäuremonohydrat          etwa    eine     Stunde    lang     bei        M      C     sulfiert.    Die       Sulfierungsmasse    wird auf     Eis    gegossen und       hieraus    der Farbstoff, der wahrscheinlich    eine     Disulfosäure    darstellt,

   als     Natriumsalz     isoliert. Er färbt Wolle in leuchtend gelben  Tönen von sehr .guter Lichtechtheit.



  Process for the preparation of a polymethine dye. Subject of this. Additional patent is a process for the preparation of a polymethine dye, which is characterized in that 1,3,

  3-TrimetUyl-5-methoxyindoline-2-methylen-co-a1.dehyde is condensed with tetrahydroquinoline and the basic dye thus obtained is treated with a sulfating agent. <I> example:

  23 parts by weight of 1,3,3-trimethyl-5-methoxyindoline-2-methylene-co-aldehyde are dissolved with 13.3 parts by weight of tetrahydroquinoline in 100 parts by weight of benzene and by adding dropwise 16 parts by weight of phosphorus oxychloride at about 15 to 20 C condensed until the dye formed.



  10 parts by weight of the so obtainable material from. Water can be crystallized in golden needles, are sulfated in 50 parts by weight of sulfuric acid monohydrate for about one hour at MC. The sulphonation mass is poured onto ice and from this the dye, which is probably a disulphonic acid,

   isolated as the sodium salt. It dyes wool in bright yellow shades of very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Poly- methinfarbstoffes, dadurch gekennzeichnet, dass man 1,3,3-Trimethyl-5-methoxyindolin- 2-methylen-co-al;dehyd mit Tetrahydrochino- lin kondensiert und den so erhaltenen basi schen Farbstoff mit einem sulfierenden Mit tel behandelt. Der so erhältliche Farbstoff färbt Wolle in leuchtend gelben Tönen von .sehr guter Lichtechtheit. PATENT CLAIM: A process for the preparation of a polymethine dye, characterized in that 1,3,3-trimethyl-5-methoxyindoline-2-methylen-co-al; dehyde is condensed with tetrahydroquinoline and the basic dye thus obtained with a treated with sulfating agents. The dye obtainable in this way dyes wool in bright yellow shades with very good lightfastness. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Sulfierung mit Schwefelsäuremonohydrat durch Behandlung während einer Stunde bei 6,5 bewirkt. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that the sulphonation with sulfuric acid monohydrate is effected by treatment for one hour at 6.5.
CH192764D 1935-01-25 1936-01-23 Process for the preparation of a polymethine dye. CH192764A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE192764X 1935-01-25
CH189651T 1936-01-23

Publications (1)

Publication Number Publication Date
CH192764A true CH192764A (en) 1937-08-31

Family

ID=25721846

Family Applications (1)

Application Number Title Priority Date Filing Date
CH192764D CH192764A (en) 1935-01-25 1936-01-23 Process for the preparation of a polymethine dye.

Country Status (1)

Country Link
CH (1) CH192764A (en)

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