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CH175238A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH175238A
CH175238A CH175238DA CH175238A CH 175238 A CH175238 A CH 175238A CH 175238D A CH175238D A CH 175238DA CH 175238 A CH175238 A CH 175238A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
produced
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 CH175238A publication Critical patent/CH175238A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.            Cxegenstand    des vorliegenden Zusatz  patentes ist ein Verfahren zur Darstellung  eines     Azofarbstoffes,    welches dadurch ge  kennzeichnet ist, dass man .die     Diazoverbin-          dung    von     4-Amino-3,2'-dimethylazobenzol     mit     1-Oxy-3,5-di-(4'-chlorphenylamino)-ben-          zol    kuppelt. Die Einwirkung der beiden  Komponenten aufeinander kann auch in  Gegenwart eines Substrates erfolgen.  



  Der in Substanz hergestellte Farbstoff  bildet ein dunkles Pulver, welches sich in  konzentrierter Schwefelsäure mit blauer  Farbe löst, und liefert, wenn auf .der Faser       erzeugt,    ein dunkles Rotbraun von guten  Echtheitseigenschaften.  



  <I>Beispiel:</I>  22,5 Gewichtsteile     4-Amino-3,2'-dimethyl-          azobenzol    werden in bekannter Weise     diazo-          tiert    und die     Diazolösung    mit einer Lösung  von 35 Gewichtsteilen     1-Oxy-3,5-di-(4'-chlor-          phenylamino)-benzol    in verdünnter Natron  lauge, welche mit der zur Bindung der über  schüssigen Mineralsäure hinreichenden Menge       Natriumacetat,    sowie     mit    5 Gewichtsteilen         Türkischrotöl        versetzt    ist; gekuppelt.

   Nach  Beendigung .der     Farbstoffbildung    wird ab  filtriert, gut mit Wasser gewaschen     und    ge  trocknet. Die Darstellung des Farbstoffes  kann auch in Gegenwart eines Substrates er  folgen. Wird der Farbstoff auf der Faser  erzeugt, so erhält man ein dunkles Rotbraun  von guten Echtheitseigenschaften.



  Process for the preparation of an azo dye. The subject of the present additional patent is a process for the preparation of an azo dye, which is characterized in that the diazo compound of 4-amino-3,2'-dimethylazobenzene with 1-oxy-3,5-di- (4 '-chlorophenylamino) -ben- zene couples. The two components can also act on one another in the presence of a substrate.



  The dyestuff produced in substance forms a dark powder, which dissolves in concentrated sulfuric acid with a blue color and, if produced on the fiber, provides a dark reddish brown with good fastness properties.



  <I> Example: </I> 22.5 parts by weight of 4-amino-3,2'-dimethyl-azobenzene are diazo- tated in a known manner and the diazo solution with a solution of 35 parts by weight of 1-oxy-3,5-di - (4'-chlorophenylamino) -benzene in dilute sodium hydroxide solution, which is mixed with the sufficient amount of sodium acetate to bind the excess mineral acid and with 5 parts by weight of Turkish red oil; coupled.

   When the dye formation is complete, it is filtered off, washed well with water and dried. The representation of the dye can also follow in the presence of a substrate. If the dye is produced on the fiber, a dark red-brown with good fastness properties is obtained.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 4-Amino-3,2'-dimethyl- azobenzol mit 1-Oxy-3,5-di-(4'-chlorphenyl- amino)-benzol kuppelt. Der in .Substanz hergestellte Farbstoff bildet ein dunkles Pulver, welches sich in konzentrierter Schwefelsäure mit blauer Farbe löst, und liefert, wenn auf der Faser erzeugt, ein dunkles Rotbraun von guten Echtheitseigenschaften. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that the diazo compound of 4-amino-3,2'-dimethyl-azobenzene with 1-oxy-3,5-di- (4'-chlorophenyl-amino) - benzene coupling. The dye produced in .Substanz forms a dark powder, which dissolves in concentrated sulfuric acid with a blue color, and, when produced on the fiber, provides a dark red-brown with good fastness properties.
CH175238D 1932-06-25 1933-06-23 Process for the preparation of an azo dye. CH175238A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE175238X 1932-06-25
CH170090T 1933-06-23

Publications (1)

Publication Number Publication Date
CH175238A true CH175238A (en) 1935-02-15

Family

ID=25718858

Family Applications (1)

Application Number Title Priority Date Filing Date
CH175238D CH175238A (en) 1932-06-25 1933-06-23 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH175238A (en)

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