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CH143393A - Process for the preparation of a water-insoluble azo dye. - Google Patents

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

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Publication number
CH143393A
CH143393A CH143393DA CH143393A CH 143393 A CH143393 A CH 143393A CH 143393D A CH143393D A CH 143393DA CH 143393 A CH143393 A CH 143393A
Authority
CH
Switzerland
Prior art keywords
water
preparation
azo dye
insoluble azo
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 CH143393A publication Critical patent/CH143393A/en

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Description

  

      Verfaftren    zur Darstellung eines     wassertinlöslichen        Azofarbstoffes.       Es wurde gefunden,     dass    man     Azofarb-          #4offe    von sehr     gaten    Echtheitseigenschaften  erhält, wenn man     Diazo-Verbindun,ren    der       Benzolreille,    welche mindestens eine negative  Gruppe enthalten, mit den bisher unbekann  ten 2<B>.</B>     3-Oxyniiphto-\:,1-4-#,#ilhyl-,oxy-l'-jiaph-          tylaminen    kuppelt.  



  Gegenstand der vorliegenden<B>E</B>     riindung     ist     gin    Verfahren zur     Darstellun-    eines       wasserunlösliehen        Azofarbstoffes    von sehr       Akuten        Echtheitsei-eiischaften,    welches<B>da-</B>  durch gekennzeichnet ist,     dass    man die     Diazo-          verbindung    von     4-Nitro-2-methoxy-l-amino-          benzol    mit 2.     3-Oxyliaphtoyl-4'-methoxy-l-          na,phtylamin    kuppelt.  



  Der Farbstoff besitzt einen schönen,     gra-          natfarbenen    Farbton und zeichnet sieh durch  sehr gute     Lichteehtheit    aus.  



  <I>Beispiel:</I>  <B>16,8</B>     Gewiehtsteile        4-Nitro-2-m-ethoxy-l-          amino-benzol    werden in bekannter Weise mit    Salzsäure und     Natriumnitrit        diazotiert.    Die       Diazolösung        lässt    man unter gutem Rühren  in eine wässerige Suspension von<B>36</B> Ge  wichtsteilen 2.     3-Oxynaphtoyl-4'-methoxy-l-          liaphtvjamin,    bereitet durch Auflösen dieser  Verbindung in verdünnter Natronlauge und  Wiederausfällen mit verdünnter Essigsäure,  einlaufen.

   Der Farbstoff scheidet sich in     gra-          natgefärbten    Flocken ab. Er wird nach Be  endigung der Kupplung abgesaugt und bildet  nach dem Trocknen ein in Wasser unlösliches  Pulver. Er zeichnet sieh durch sehr gute  Lichtbeständigkeit aus. Je nach dem Ver  wendungszweck des Farbstoffes können bei  der Kupplung Substrate anorganischer oder  organischer Natur zugesetzt werden.



      Procedure for the preparation of a water-soluble azo dye. It has been found that azo dyes with very good fastness properties are obtained if diazo compounds of the benzene ring, which contain at least one negative group, are obtained with the previously unknown 2. 3-oxyniphto - \ :, 1-4 - #, # ilhyl-, oxy-l'-jiaphthylaminen couples.



  The subject matter of the present invention is a process for the preparation of a water-insoluble azo dye of very acute fastness properties, which is characterized by the fact that the diazo compound of 4 -Nitro-2-methoxy-1-amino-benzene coupled with 2. 3-oxyliaphtoyl-4'-methoxy-l-na, phtylamine.



  The dye has a beautiful, granite-colored shade and is characterized by very good lightness.



  <I> Example: </I> <B> 16.8 </B> parts by weight of 4-nitro-2-m-ethoxy-1-amino-benzene are diazotized in a known manner with hydrochloric acid and sodium nitrite. The diazo solution is allowed to stir well into an aqueous suspension of 36 parts by weight of 2. 3-oxynaphtoyl-4'-methoxy-l-liaphthovyamine, prepared by dissolving this compound in dilute sodium hydroxide solution and reprecipitating with dilute acetic acid , run in.

   The dye is deposited in granite-colored flakes. It is suctioned off after the coupling has ended and, after drying, forms a powder which is insoluble in water. It is characterized by very good lightfastness. Depending on the intended use of the dye, substrates of inorganic or organic nature can be added during the coupling.

 

Claims (1)

PATENTANSPRUCII: Verfahren zur Darstellung eines wasser unlöslichen Azofarbstoffes, dadurch gekenn- zeichnet, dass man die Diazoverbindung des 4-Nitro-2-metlioxy-l-aminobenzols mit 2 .3- Oxynaphtoyl <B>-</B> 4'<B>-</B> methoxy <B>- l' -</B> naphtylamin kuppelt. Der Farbstoff besitzt einen granatiarbe-- neu Farbton und zeichnet sieh durch sehr gute Lichtechtheit aus. PATENT CLAIM: Process for the preparation of a water-insoluble azo dye, characterized in that the diazo compound of 4-nitro-2-metlioxy-1-aminobenzene is mixed with 2 .3-oxynaphtoyl <B> - </B> 4 ' - </B> methoxy <B> - l '- </B> naphtylamine couples. The dye has a new garnet color and is characterized by very good lightfastness.
CH143393D 1928-02-18 1929-02-15 Process for the preparation of a water-insoluble azo dye. CH143393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE143393X 1928-02-18

Publications (1)

Publication Number Publication Date
CH143393A true CH143393A (en) 1930-11-15

Family

ID=5669676

Family Applications (1)

Application Number Title Priority Date Filing Date
CH143393D CH143393A (en) 1928-02-18 1929-02-15 Process for the preparation of a water-insoluble azo dye.

Country Status (1)

Country Link
CH (1) CH143393A (en)

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