CH150793A - 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
CH150793A
CH150793A CH150793DA CH150793A CH 150793 A CH150793 A CH 150793A CH 150793D A CH150793D A CH 150793DA CH 150793 A CH150793 A CH 150793A
Authority
CH
Switzerland
Prior art keywords
water
preparation
insoluble azo
azo dye
garnet
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 CH150793A publication Critical patent/CH150793A/en

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Description

  

      Ycilahr    en mir<B>Dar</B>     stell1111g    eines     wasser    unlöslichen     Azofarhstoffes.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung eines wasserunlös  lichen     Azofarbstoffes,    das dadurch gekenn  zeichnet ist, dass man die     Nitrosodiazoverbin-          dung    von     Anilin-azo-diphenylamin    mit     2.3-          Oxy        naphtoesäure-2'-naphtylamid    kuppelt. Die  Einwirkung der beiden Komponenten aufein  ander kann auch in Gegenwart eines Sub  strates erfolgen.  



  Der in     Substanz    hergestellte     Nitrosofarb-          stoff    bildet ein     granatrotes    Pulver und liefert,  wenn auf der Faser erzeugt, eine     granatrote     Färbung, die bei der Nachbehandlung mit  alkalischen Reduktionsmitteln in ein Schwarz  von guter Wasch-, Chlor- und Lichtechtheit  übergeht.  



  <I>Beispiel:</I>  2,88 Gewichtsteile Anilin -     azo    -     diphenyl-          amin,    4,35 Raumteile konzentrierte Salzsäure  und 20 Raumteile Wasser werden unter Eis  kühlung gerührt und durch Zugabe einer    konzentrierten Lösung von 1,4 Gewichtsteilen       Natriumnitrit    dianotiert und     nitrosiert.    Die  erhaltene Lösung lässt man einlaufen in eine  Lösung aus 3,13 Gewichtsteilen<B>2.3</B> -     Oxy-          naphtoesäure-2'-        naphtylamid,    6 Raumteilen  Natronlauge 40       B6    und 100 Raumteilen  Wasser.

   Der     granatrote        Farbstoff    wird abge  saugt und mit Wasser gewaschen. Durch  Nachbehandlung mit alkalischen Reduktions  mitteln, zum Beispiel stark verdünnten Lö  sungen von     Natriumsulfit,        Scbwefelnatrium     oder     pheriylhydrazinsulfosaurem    Natrium, de  nen zweckmässig noch etwas Natronlauge  oder Soda zugesetzt wird, geht der Farbstoff  in der Wärme in ein Schwarz über.



      Ycilahr en me <B> Dar </B> represent1111g of a water-insoluble azo carbon. The subject of this additional patent is a process for the preparation of a water-insoluble azo dye, which is characterized in that the nitrosodiazo compound of aniline-azo-diphenylamine is coupled with 2,3-oxynaphthoic acid-2'-naphthylamide. The action of the two components on one another can also take place in the presence of a substrate.



  The nitroso dye, produced in bulk, forms a garnet-red powder and, if produced on the fiber, produces a garnet-red color which, when treated with alkaline reducing agents, turns into a black with good fastness to washing, chlorine and light.



  <I> Example: </I> 2.88 parts by weight of aniline - azo - diphenylamine, 4.35 parts by volume of concentrated hydrochloric acid and 20 parts by volume of water are stirred while cooling with ice and dianotized by adding a concentrated solution of 1.4 parts by weight of sodium nitrite and nitrosated. The solution obtained is allowed to run into a solution of 3.13 parts by weight 2.3-oxynaphthoic acid-2'-naphthylamide, 6 parts by volume of sodium hydroxide solution 40 B6 and 100 parts by volume of water.

   The garnet-red dye is filtered off with suction and washed with water. After treatment with alkaline reducing agents, for example very dilute solutions of sodium sulfite, sodium sulfite or sodium pheriylhydrazinesulfosaurem, to which a little caustic soda or soda is expediently added, the dye turns black when heated.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines wasser unlöslichen Azofarbstoffes, dadurch gekenn zeichnet, dass man die Nitrosodiazoverbindung von Anilin-azo-diphenylamin mit 2.3-Osy- naphtoesäure-2'-naphtylamid kuppelt. Der in Substanz hergestellte Nitrosofarb- stoff bildet ein granatrotes Pulver und liefert, wenn auf der Faser erzeugt, eine granatrote Färbung, die bei der Nachbehandlung mit alkalischen Reduktionsmitteln in ein Schwarz von guter Wasch-, Chlor- und Lichtechtheit übergeht. Claim: Process for the preparation of a water-insoluble azo dye, characterized in that the nitrosodiazo compound of aniline-azo-diphenylamine is coupled with 2,3-osynaphthoic acid-2'-naphthylamide. The nitroso dye, produced in bulk, forms a garnet-red powder and, if produced on the fiber, produces a garnet-red color which, when treated with alkaline reducing agents, turns into a black with good fastness to washing, chlorine and light.
CH150793D 1929-02-18 1930-01-30 Process for the preparation of a water-insoluble azo dye. CH150793A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE150793X 1929-02-18
CH147797T 1930-01-30

Publications (1)

Publication Number Publication Date
CH150793A true CH150793A (en) 1931-11-15

Family

ID=25715086

Family Applications (1)

Application Number Title Priority Date Filing Date
CH150793D CH150793A (en) 1929-02-18 1930-01-30 Process for the preparation of a water-insoluble azo dye.

Country Status (1)

Country Link
CH (1) CH150793A (en)

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