CH140416A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH140416A
CH140416A CH140416DA CH140416A CH 140416 A CH140416 A CH 140416A CH 140416D A CH140416D A CH 140416DA CH 140416 A CH140416 A CH 140416A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
acid
dye
amino
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 CH140416A publication Critical patent/CH140416A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Es wurde gefunden, dass     män        bordo-    vio  lett- und     violettbraune        Azofarbstoffe    erhält,  wenn man     4-Aminoriaphthalsäurederivate    von  folgender Konstitution  
EMI0001.0007     
    wobei X Wasserstoff,     Alkyl,        Aryl    oder     Aral-          kyl    bedeutet,

   oder deren     Substitutionsprodukte     oder Derivate     diazotiert    und in Substanz  oder auf der Faser mit     2.3-Oxynaphtoe-          säurearylamiden    kuppelt. Diese     Azofarbstoffe       liefern Farbtöne, die sich durch eine gute  bis hervorragende Lichtechtheit auszeichnen.  



  Die     4-Aminonaphtalsäurederivate    kann  man beispielsweise darstellen aus     4-Amino-          naphtalsäureanhydrid    oder deren     Substitutions-          produkten    durch Umsetzen mit Ammoniak,       aliphatischen    und aromatischen Aminen.  



  Gegenstand des vorliegenden Patentes  ist ein Verfahren zur Darstellung eines     Azo-          farbstoffes,    welches darin besteht, dass man  die     Diazoverbindung    von     4-Amino-1.8-naph-          talsäuremethlimid    mit     2-3-Oxynaphtoesäure-2'-          5'-dimethoxy-1'-anilid    kuppelt. Man erhält  ein schönes, sehr blaustichiges     Bordo    von  hervorragender Lichtechtheit.  



  <I>Beispiel:</I>  Die in üblicher Weise aus 22 Gewichts  teilen     4-Amino-1-8-naphtalsäuremethylimid     dargestellte     Diazolös.ung    lässt man unter  Rühren in eine Lösung von 32 Gewichtstei-           len        2-3-Oxynaphtoesäur-e-2'-5'-dimethoxy-1'-          anilid    in 90 Raumteilen Natronlauge von  340N verdünnt mit Wasser zufliessen.  



  Der Farbstoff scheidet sich ab und wird  abgesaugt, gewaschen und getrocknet; er ist  blaustichig     bordo    und besitzt eine hervor  ragende Lichtechtheit.



  Process for the preparation of an azo dye. It has been found that Bordeaux and violet-brown azo dyes are obtained when 4-amino naphthalic acid derivatives of the following constitution are used
EMI0001.0007
    where X is hydrogen, alkyl, aryl or aralkyl,

   or their substitution products or derivatives are diazotized and coupled in substance or on the fiber with 2,3-oxynaphtoe acid arylamides. These azo dyes provide shades that are characterized by good to excellent lightfastness.



  The 4-aminonaphthalic acid derivatives can be prepared, for example, from 4-aminonaphthalic anhydride or their substitution products by reaction with ammonia, aliphatic and aromatic amines.



  The subject of the present patent is a process for the preparation of an azo dye, which consists in that the diazo compound of 4-amino-1,8-naphthalic acid methylimide with 2-3-oxynaphthoic acid-2'-5'-dimethoxy-1'- anilid domes. A beautiful, very bluish border of excellent lightfastness is obtained.



  <I> Example: </I> The diazo solution prepared in the usual way from 22 parts by weight of 4-amino-1-8-naphthalic acid methylimide is allowed to stir into a solution of 32 parts by weight of 2-3-oxynaphthoic acid-e- 2'-5'-dimethoxy-1'-anilide in 90 parts by volume of 340N sodium hydroxide solution diluted with water.



  The dye separates and is filtered off, washed and dried; it has a bluish bordo and has excellent lightfastness.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 4-Amino-1-8-naph- talsätrr-emetbylimid mit 2-3-Oxyrraphtoesäure- 2'-5'-dimethoxy-1'-ariilid kuppelt. Der Farb stoff gibt ein schönes, sehr blaustichiges Bordo von hervorragender Lichtechtheit. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that the diazo compound of 4-amino-1-8-naphthalene-methylimide is mixed with 2-3-oxyrraphtoic acid-2'-5'-dimethoxy-1'-arilide clutch. The dye gives a beautiful, very bluish border with excellent lightfastness.
CH140416D 1927-12-10 1928-12-07 Process for the preparation of an azo dye. CH140416A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE140416X 1927-12-10

Publications (1)

Publication Number Publication Date
CH140416A true CH140416A (en) 1930-06-15

Family

ID=5668210

Family Applications (1)

Application Number Title Priority Date Filing Date
CH140416D CH140416A (en) 1927-12-10 1928-12-07 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH140416A (en)

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