CH255315A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH255315A
CH255315A CH255315DA CH255315A CH 255315 A CH255315 A CH 255315A CH 255315D A CH255315D A CH 255315DA CH 255315 A CH255315 A CH 255315A
Authority
CH
Switzerland
Prior art keywords
production
azo dye
dye
new azo
new
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
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 Ici Ltd filed Critical Ici Ltd
Publication of CH255315A publication Critical patent/CH255315A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
    • C09B29/08—Amino benzenes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

      Verfahren    zur     Herstellung        eines    neuen     Azofarbstoffes.       Die vorliegende Erfindung     bezieht.    sich  auf ein Verfahren zur     Herstellung    eines  neuen     Azofarbstoffes,    gemäss welchem     diazo-          tiertes        2-Cyan-4-nitranilin    mit dem     Schwefel-          säureester    des     N-ss-Oxyäthyl-N-ss'-p-tolyloxy-          äthylaniline    gekuppelt     wird.     



  Der neue Farbstoff bildet ein     grünlich-          schwarzes    Pulver, welches in heissem Wasser  eine     rötlichviolette    Lösung und in     Sch-#vefel-          sä.ure    eine stumpfe     karmesinrote    Lösung er  gibt.  



  <I>Beispiel:</I>  <B>16,3</B> Teile     2-Cyan-4-nitranilin    werden  gemäss der in Beispiel 1 des britischen Pa  tentes Nr. 447561 beschriebenen Methode     di-          azotiert    und die so erhaltene Lösung unter  Rühren     einer        gekühlten    Lösung von 35,7 Tei  len des     Natriumsalzes    des     N-ss-Oxyäthyl-          '-ss'-p-tolyloxyäthylanilinschwefelsäureesters     in 400 Teilen Wasser hinzugesetzt.

   Nach be  endeter Kupplung wird das Gemisch langsam  mit 40%iger wässriger     Natriumhydroxyd-          Irisung    so lange versetzt, und zwar unter  Aufrechterhaltung einer Temperatur von  weniger als 10 C durch Aussenkühlung, bis  (las Gemisch eben     lackmusal'kalisch    reagiert.    Hierauf wird während einer weiteren Stunde       gerührt    und der Farbstoff alsdann     abfil-          triert    und bei     30-40     C getrocknet.

   Der  Farbstoff bildet ein     grünlicbschwarzes    Pul  ver, welches in heissem Wasser     unter    Bildung  einer     rötlichvioletten    Lösung und in Schwe  felsäure unter Bildung einer stumpfen  karmesinroten Lösung löslich ist. Er färbt.       Celluloseacetatkunstseide    und Polyamid  fasern oder     Polyamidgewebe    in violetten  Farbtönen von sehr     guter        Lichtechtheit,    so  fern das Auffärben aus einem neutralen Na  triumchlorid oder Natriumsulfat enthalten  den     Färbebade    erfolgt.



      Process for the production of a new azo dye. The present invention relates. refers to a process for the production of a new azo dye, according to which diazotized 2-cyano-4-nitroaniline is coupled with the sulfuric acid ester of N-ß-oxyethyl-N-ß-p-tolyloxy-ethylaniline.



  The new dye forms a greenish-black powder, which gives a reddish-purple solution in hot water and a dull crimson-red solution in shear acid.



  <I> Example: </I> <B> 16.3 </B> parts of 2-cyano-4-nitroaniline are azotized according to the method described in Example 1 of British Patent No. 447561, and the solution thus obtained while stirring, a cooled solution of 35.7 parts of the sodium salt of N-ßs-oxyethyl- '-ss'-p-tolyloxyethylaniline sulfuric acid ester in 400 parts of water is added.

   After the coupling is complete, 40% aqueous sodium hydroxide iridescence is slowly added to the mixture, while maintaining a temperature of less than 10 ° C. by external cooling, until the mixture reacts like a litmus. This is followed by a further hour stirred and the dye is then filtered off and dried at 30.degree.-40.degree.

   The dye forms a greenish-black powder which is soluble in hot water to form a reddish-purple solution and in sulfuric acid to form a dull crimson solution. He colors. Cellulose acetate rayon and polyamide fibers or polyamide fabric in violet shades of very good lightfastness, as long as the dye is made from a neutral sodium chloride or sodium sulfate containing the dye bath.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass diazotiertes 2-Cyan-4-nitranilin mit dem Schwefelsäureester des N-ss-Oxyäthyl-N-ss'- p-tolyloxyäthylanilins gekuppelt wird. Der neue Farbstoff bildet ein grünlich- schwarzes Pulver, welches in heissem Wasser eine rötlichviolette Lösung und in Schwefel säure eine stumpfe karmesinrote Lösung er- gibt. PATENT CLAIM: Process for the production of a new azo dye, characterized in that diazotized 2-cyano-4-nitroaniline is coupled with the sulfuric acid ester of N-ss-oxyethyl-N-ss'-p-tolyloxyethylaniline. The new dye forms a greenish-black powder, which in hot water gives a reddish-violet solution and in sulfuric acid a dull crimson solution.
CH255315D 1944-08-28 1945-08-28 Process for the production of a new azo dye. CH255315A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB255315X 1944-08-28
CH249376T 1945-08-28

Publications (1)

Publication Number Publication Date
CH255315A true CH255315A (en) 1948-06-15

Family

ID=25729349

Family Applications (1)

Application Number Title Priority Date Filing Date
CH255315D CH255315A (en) 1944-08-28 1945-08-28 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH255315A (en)

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