CH212647A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH212647A
CH212647A CH212647DA CH212647A CH 212647 A CH212647 A CH 212647A CH 212647D A CH212647D A CH 212647DA CH 212647 A CH212647 A CH 212647A
Authority
CH
Switzerland
Prior art keywords
sep
azo dye
preparation
dye
parts
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 CH212647A publication Critical patent/CH212647A/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     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen,  wertvollen     Azofarbstoff    erhält, wenn man       diazotiertes        4-Nitro-l-aminobenzol    mit ss-N-         Methyl-N-phenylaminopropionsäure-R'-ogy-          äthylester    entsprechend der Formel  
EMI0001.0007     
    kuppelt.    Der neue     Azofarbstoff    eignet sich beson  ders zum Färben von     Celluloseestern    und       -äthern,    wobei man klare scharlachrote Töne  von ausgezeichneter Lichtechtheit erhält.

   Der       Farbstoff    lässt sich mit Hilfe geeigneter Dis  pergiermittel so fein in Wasser verteilen,  dass man kolloidale Lösungen erhält, die sich  nicht von echten Lösungen unterscheiden.  Solche Lösungen besitzen ein vorzügliches       Durchfärbevermögen    für dichtgeschlagenes       Acetatseidengewebe    und stark gezwirntes       Acetatseidengarn.     



       Beispiel:     Die     Diazoverbindung    aus 138 Teilen     1-          Amino-4-nitrobenzol    wird bei 0-5<B>0</B> C lang-         sam    in die mit Wasser auf etwa 5000 Teile  verdünnte     Lösung    von 234 Teilen f-N-Me       thyl-N-phenylaminopropionsäure-P'-ogyäthyl-          ester    in 110 Teilen 35     o/oiger    Salzsäure ein  gegossen. Die Kupplung ist nach einigen  Stunden beendet.

   Man versetzt mit soviel       Natriumacetat    oder verdünnter Natronlauge,  dass das p$ der Lösung 5 beträgt, saugt ab,  wäscht gut aus, trocknet bei<B>501</B> C und     ver-          mahlt    mit der gleichen Menge eines     Disper-          giermittels.     



  Der Farbstoff bildet ein rotbraunes Pulver  und liefert aus Glaubersalz oder     Ohloram-          monium    enthaltenden     wässrigen    Bädern kräf  tige scharlachrote Färbungen auf     Acetatseide,     die gut durchgefärbt und lichtecht sind.



  Process for the preparation of an azo dye. It has been found that a new, valuable azo dye is obtained if diazotized 4-nitro-1-aminobenzene with ß-N-methyl-N-phenylaminopropionic acid-R'-ogy-ethyl ester according to the formula
EMI0001.0007
    clutch. The new azo dye is particularly suitable for dyeing cellulose esters and ethers, with clear scarlet shades of excellent lightfastness being obtained.

   With the help of suitable dispersants, the dye can be distributed so finely in water that colloidal solutions are obtained that do not differ from real solutions. Such solutions have excellent dyeing properties for tightly twisted acetate silk fabrics and heavily twisted acetate silk yarn.



       Example: The diazo compound from 138 parts of 1-amino-4-nitrobenzene is slowly converted at 0-5 ° C. into the solution of 234 parts of fN-methyl-N diluted to about 5000 parts with water -phenylaminopropionic acid-P'-ogyäthyl- ester poured into 110 parts of 35% hydrochloric acid. The coupling is complete after a few hours.

   Sodium acetate or dilute sodium hydroxide solution is added in an amount such that the p $ of the solution is 5, filtered off with suction, washed thoroughly, dried at 501 C and ground with the same amount of a dispersing agent.



  The dye forms a red-brown powder and, from aqueous baths containing Glauber's salt or Ohloram- monium, produces strong, scarlet colorations on acetate silk that are well colored and lightfast.

Claims (1)

EMI0002.0001 hATENTANSPRUCIl: <tb> Verfahren <SEP> zur <SEP> Herstellung <SEP> eines <SEP> Azofarb stoffes, <SEP> dadurch <SEP> gekennzeichnet, <SEP> dass <SEP> man <tb> diazotiertes <SEP> 4-Nitro-l-aminobenzol <SEP> mit <SEP> ss-N Methyl <SEP> -N- <SEP> phenylaminopi#opionsäui-e-P'- <SEP> ory äthylester <SEP> kuppelt. EMI0002.0002 Der <SEP> neue <SEP> Farbstoff <SEP> färbt <SEP> Celluloseester <tb> und <SEP> -ätliei- <SEP> aus <SEP> wäl#rigem <SEP> Bade <SEP> in <SEP> scharlach roten <SEP> Tönen. EMI0002.0001 HAVE CLAIM: <tb> Process <SEP> for <SEP> production <SEP> of an <SEP> azo dye, <SEP> characterized by <SEP>, <SEP> that <SEP> man <tb> diazotized <SEP> 4-nitro-l-aminobenzene <SEP> with <SEP> ss-N methyl <SEP> -N- <SEP> phenylaminopi # opionsäui-e-P'- <SEP> ory ethyl ester <SEP > couples. EMI0002.0002 The <SEP> new <SEP> dye <SEP> colors <SEP> cellulose ester <tb> and <SEP> -ätliei- <SEP> from <SEP> round <SEP> bath <SEP> in <SEP> scarlet red <SEP> tones.
CH212647D 1938-07-28 1939-06-27 Process for the preparation of an azo dye. CH212647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE212647X 1938-07-28

Publications (1)

Publication Number Publication Date
CH212647A true CH212647A (en) 1940-12-15

Family

ID=5809144

Family Applications (1)

Application Number Title Priority Date Filing Date
CH212647D CH212647A (en) 1938-07-28 1939-06-27 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH212647A (en)

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