CH220669A - Process for the preparation of a methine dye. - Google Patents

Process for the preparation of a methine dye.

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Publication number
CH220669A
CH220669A CH220669DA CH220669A CH 220669 A CH220669 A CH 220669A CH 220669D A CH220669D A CH 220669DA CH 220669 A CH220669 A CH 220669A
Authority
CH
Switzerland
Prior art keywords
preparation
methine dye
dye
isooctyl
cyanoacetate
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
Priority claimed from DEF3760D external-priority patent/DE878539C/en
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH220669A publication Critical patent/CH220669A/en

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Description

  

  Verfahren zur Herstellung eines     Nethinfarbstoffes.       Gegenstand des vorliegenden Zusatzpatentes  ist ein Verfahren zur Herstellung eines     Methin-          farbstoffes,    welches dadurch gekennzeichnet  ist, dass man     p-Dimethylaminobenzaldehyd    mit       Cyanessigsäureisooctylester    der Formel  
EMI0001.0006     
    umsetzt.  Der neue Farbstoff färbt     Celluloseester     und     -äther    in sehr klaren,     grünstichig    gelben  Tönen.

   Er besitzt ein     hervorragendes    Zieh  vermögen auf     Acetatseide    und sehr gute     Nass-          echtheiten.     



       Beispiel:     233 g     Cyanessigsäureisooctylester    vom       Kp.s    l18-123   C     (erhältlich    durch     Vereste-          rung    von     Cyanessigsäure    mit     Isooctylalkohol     oder durch     Veresterung    von Chloressigsäure mit       Isooctylalkohol    und Umsetzen des     Chloratoms       mit     Alkalicyanid    nach     bekannten    Verfahren)

    werden mit 149 Gewichtsteilen     para-Dimethyl-          amino-benzaldehyd    in 400 Gewichtsteilen     lTe-          thanol    unter Zusatz von 0,4 Gewichtsteilen       Piperidin        mehrere    Stunden zum Sieden erhitzt,  bis die     Farbstoffbildung    beendet ist. Das Metha  nol wird     abdestilliert.    Der zurückbleibende  Farbstoff färbt     Celluloseester    und     -äther    in  sehr klaren,     grünstichig    gelben Tönen.

   Er  besitzt ein hervorragendes Ziehvermögen auf       Acetatseide    und sehr gute     Nassechtheiten.  



  Process for the preparation of a nethine dye. The subject of the present additional patent is a process for the production of a methine dye, which is characterized in that p-dimethylaminobenzaldehyde is mixed with isooctyl cyanoacetate of the formula
EMI0001.0006
    implements. The new dye colors cellulose esters and ethers in very clear, greenish yellow tones.

   It has excellent drawability on acetate silk and very good wet fastness properties.



       Example: 233 g isooctyl cyanoacetate of bp 18-123 C (obtainable by esterifying cyanoacetic acid with isooctyl alcohol or by esterifying chloroacetic acid with isooctyl alcohol and reacting the chlorine atom with alkali metal cyanide according to known processes)

    are heated to boiling with 149 parts by weight of para-dimethylamino-benzaldehyde in 400 parts by weight of ethanol with the addition of 0.4 parts by weight of piperidine for several hours until the dye formation has ended. The methanol is distilled off. The remaining dye colors cellulose esters and ethers in very clear, greenish yellow tones.

   It has excellent drawability on acetate silk and very good wet fastness properties.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines Methin- farbstoffes, dadurch gekennzeichnet, dass man p-Dimethylaminobenzaldehyd mit Cyanessig- säureisooctylester der Formel EMI0001.0046 umsetzt. PATENT CLAIM Process for the production of a methine dye, characterized in that p-dimethylaminobenzaldehyde is mixed with isooctyl cyanoacetate of the formula EMI0001.0046 implements. Der neue Farbstoff färbt Celluloseester und -äther in sehr klaren, grünstichig gelben Tönen. Fr besitzt ein hervorragendes Zieh vermögen auf Acetatseide und Sehr gute -,Nass- echtheiten. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dar man die -Umsetzung in siedendem Methanol unter Zusatz von etwas Piperidin vornimmt. The new dye colors cellulose esters and ethers in very clear, greenish yellow tones. Fr has excellent drawability on acetate silk and very good wet fastness properties. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that the conversion is carried out in boiling methanol with the addition of some piperidine.
CH220669D 1939-08-17 1940-07-08 Process for the preparation of a methine dye. CH220669A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEF3760D DE878539C (en) 1939-08-17 1939-08-17 Process for the production of methine dyes
DE220669X 1940-05-30
DE220670X 1940-05-30
CH217770T 1940-07-08

Publications (1)

Publication Number Publication Date
CH220669A true CH220669A (en) 1942-04-15

Family

ID=32110871

Family Applications (1)

Application Number Title Priority Date Filing Date
CH220669D CH220669A (en) 1939-08-17 1940-07-08 Process for the preparation of a methine dye.

Country Status (1)

Country Link
CH (1) CH220669A (en)

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