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CH160670A - Process for the preparation of a water-insoluble azo dye. - Google Patents

Process for the preparation of a water-insoluble azo dye.

Info

Publication number
CH160670A
CH160670A CH160670DA CH160670A CH 160670 A CH160670 A CH 160670A CH 160670D A CH160670D A CH 160670DA CH 160670 A CH160670 A CH 160670A
Authority
CH
Switzerland
Prior art keywords
water
preparation
insoluble azo
azo dye
dye
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 CH160670A publication Critical patent/CH160670A/en

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

Description

  

  Verfahren zur Darstellung eines wasserunlöslichen     Azofarbstoffes.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung eines wasser  unlöslichen     Azofarbstoffes,    das dadurch ge  kennzeichnet ist, dass man die     Diazoverbin-          dung    von     2.5-Dichloranilin    mit     Terephta-          loyl-bis-essigsäure-l-a.mino-3    -     chlor-4    . 6 -     di-          methoxybenzol    kuppelt. Die Einwirkung der  beiden Komponenten aufeinander kann auch  in Gegenwart eines Substrates erfolgen.  



  Der in Substanz hergestellte Farbstoff  bildet ein     rotstichig    gelbes Pulver; die Fär  bungen besitzen einen lebhaften,     rotstichig     gelben Farbton und sind sehr gut lichtecht.       Beispiel:     58,9     gr        Terephta.loyl    - bis -     essigsäure-          1    -     amino    - 3 - chlor - 4 . 6 -     dimethogybenzol     werden in 100 cm' doppelt normaler Natron  lauge und Wasser heiss gelöst.

   Diese Lö  sung läuft zu einer wie folgt bereiteten       Diazolösung:    32,4     gr    2 . 5 -     Dichloranilin     werden mit 52     ein'    Salzsäure von 22       B6    und  14,4     gr        Natriumnitrit    unter Eiszusatz wie  üblich     diazotiert    und mit     Natriumacetat    auf  Kongoneutralität abgestumpft.    Die     Farbstoffbildung    ist nach     mehrstün-          digem        Nachrühren    beendet. Man saugt ab,  wäscht gut mit Wasser und trocknet.  



  Man erhält ein     rotstichig    gelbes Pulver.  Die Darstellung des Farbstoffes     kann    auch  in     Gegenwart    eines Substrates erfolgen.  Wird der Farbstoff auf der Faser erzeugt,  so erhält man einen sehr lichtechten,     lebhaf-          ten        rotstichig    gelben Farbton.



  Process for the preparation of a water-insoluble azo dye. The subject of this additional patent is a process for the preparation of a water-insoluble azo dye, which is characterized in that the diazo compound of 2,5-dichloroaniline with terephthalyl-bis-acetic acid-1-a.mino-3-chloro-4. 6 - dimethoxybenzene couples. The two components can also act on one another in the presence of a substrate.



  The dye produced in substance forms a reddish-tinged yellow powder; the colors have a lively, reddish yellow hue and are very lightfast. Example: 58.9 g terephta.loyl - bis - acetic acid - 1 - amino - 3 - chlorine - 4. 6 - dimethogybenzene are dissolved in 100 cm 'double normal sodium hydroxide solution and hot water.

   This solution runs into a diazo solution prepared as follows: 32.4 gr 2. 5 - dichloroaniline are diazotized with 52 a 'hydrochloric acid of 22 B6 and 14.4 g sodium nitrite with the addition of ice as usual and blunted to Congo neutrality with sodium acetate. The formation of the dye has ended after stirring for several hours. It is suctioned off, washed well with water and dried.



  A reddish yellow powder is obtained. The preparation of the dye can also take place in the presence of a substrate. If the dye is produced on the fiber, a very lightfast, vivid reddish yellow color is obtained.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines w=asser- unlöslichen Azofarbstoffes, dadurch gekenn zeichnet, dass man die Diazoverbindung von 2 . 5 - Dichloranilin mit Terephtaloyl - bis- essigsäure - 1 - amino - 3 - chlor - 4 . 6 - di- methogybenzol kuppelt. PATENT CLAIM: Process for the preparation of a water-insoluble azo dye, characterized in that the diazo compound of 2. 5 - dichloroaniline with terephtaloyl - bis - acetic acid - 1 - amino - 3 - chlorine - 4. 6 - dimethogybenzene couples. Der in Substanz hergestellte Farbstoff bildet ein rotstichig gelbes Pulver; die Fär bungen besitzen einen lebhaften, rotstichig gelben Farbton und sind sehr gut lichtecht. The dye produced in substance forms a reddish-tinged yellow powder; the colors have a lively, reddish yellow hue and are very lightfast.
CH160670D 1930-09-09 1931-05-07 Process for the preparation of a water-insoluble azo dye. CH160670A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE160670X 1930-09-09
CH153828T 1931-05-07

Publications (1)

Publication Number Publication Date
CH160670A true CH160670A (en) 1933-03-15

Family

ID=25716319

Family Applications (1)

Application Number Title Priority Date Filing Date
CH160670D CH160670A (en) 1930-09-09 1931-05-07 Process for the preparation of a water-insoluble azo dye.

Country Status (1)

Country Link
CH (1) CH160670A (en)

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