CH180692A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH180692A
CH180692A CH180692DA CH180692A CH 180692 A CH180692 A CH 180692A CH 180692D A CH180692D A CH 180692DA CH 180692 A CH180692 A CH 180692A
Authority
CH
Switzerland
Prior art keywords
new
preparation
good
red color
azo dye
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH180692A publication Critical patent/CH180692A/en

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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
    • C09B29/02—Monoazo dyes prepared by diazotising and coupling from diazotised o-amino-hydroxy compounds

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

Description

  

  Verfahren zur Darstellung eines     Azofa.rbstof%s.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    von wertvollen Eigenschaften  erhält, wenn man dianotiertes     5-Nitro-2-          amino-l-phenol    mit     2.5-Dimethoxy-l-amino-          benzol    vereinigt.  



  Der neue     Farbstoff    ist ein irr     Wasser     unlösliches, dunkelgrünes, metallglänzendes  Pulver, das in Aceton mit blauroter und in  konzentrierter Schwefelsäure mit bordeaux  roter     Farbe    löslich ist. Er färbt     Acetatseide     nach üblichem Verfahren auf Grund seines  guten Ziehvermögens und seiner hervorragen  den Löslichkeit in kräftigen, blauroten Tönen,  die sich durch ihre grosse Reinheit und Schön  heit auszeichnen. Die Färbungen zeigen gute  Echtheitseigenschaften und sind rein weiss       ätzbar.    Das neue Produkt ist auch ein gutes       Färbemittel    für Lacke.  



  <I>Beispiel:</I>  15,4 Teile     5-Nitro-2-amino-l-phenol    wer  den mit 300 Teilern Wasser vermahlen; die  erhaltene Suspension wird mit 25 Teilen  konzentrierter Salzsäure und 7 Teilen Na  triumnitrit dianotiert und die so bereitete         Diazolösung    mit einer Lösung von 15,3 Tei  len     2.5-Dimethoxy-l-aminobenzol    in ver  dünnter Salzsäure vereinigt. Der nach län  gerem Rühren ausgeschiedene Farbstoff wird  filtriert und gewaschen.



  Method for the preparation of an azofa% s. It has been found that a new azo dye with valuable properties is obtained if dianotated 5-nitro-2-amino-1-phenol is combined with 2,5-dimethoxy-1-aminobenzene.



  The new dye is a water-insoluble, dark green, metal-shiny powder that is soluble in acetone with a blue-red color and in concentrated sulfuric acid with a burgundy red color. Due to its good drawability and its excellent solubility, it dyes acetate silk according to the usual methods in strong, blue-red tones, which are characterized by their great purity and beauty. The dyeings show good fastness properties and can be etched in pure white. The new product is also a good colorant for paints.



  <I> Example: </I> 15.4 parts of 5-nitro-2-amino-l-phenol are ground with 300 parts of water; the suspension obtained is dianotized with 25 parts of concentrated hydrochloric acid and 7 parts of sodium nitrite and the diazo solution thus prepared is combined with a solution of 15.3 parts of 2.5-dimethoxy-1-aminobenzene in dilute hydrochloric acid. The dye which separates out after prolonged stirring is filtered and washed.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man dianotiertes 5-Nitro-2-amirro-l-phenol mit 2.5-Dimethoxy-l-aminobenzol vereinigt. Der neue Farbstoff ist ein in Wasser unlösliches, dunkelgrünes, metallglänzendes Pulver, das in Aceton mit blauroter und in konzentrier ter Schwefelsäure mit bordeauxroter Farbe löslich ist. Er färbt Acetatseide nach üb lichem Verfahren auf Grund seines guten Ziehvermögens und seiner hervorragenden Löslichkeit in kräftigen blauroten Tönen, die sich durch ihre grosse Reinheit und Schönheit auszeichnen. Claim: Process for the preparation of a new azo dye, characterized in that dianotated 5-nitro-2-amirro-1-phenol is combined with 2,5-dimethoxy-1-aminobenzene. The new dye is a water-insoluble, dark green, metallic-luster powder that is soluble in acetone with a blue-red color and in concentrated sulfuric acid with a claret-red color. It dyes acetate silk according to the usual methods due to its good drawability and its excellent solubility in strong blue-red tones, which are characterized by their great purity and beauty. Die Färbungen zeigen gute Echtheitseigenschaften und sind nein weiss ätzbar. Das neue Produkt ist auch ein gutes Färbemittel für Lacke. The dyeings show good fastness properties and are no white etchable. The new product is also a good colorant for paints.
CH180692D 1935-02-15 1935-02-15 Process for the preparation of an azo dye. CH180692A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH180692T 1935-02-15

Publications (1)

Publication Number Publication Date
CH180692A true CH180692A (en) 1935-11-15

Family

ID=4430207

Family Applications (1)

Application Number Title Priority Date Filing Date
CH180692D CH180692A (en) 1935-02-15 1935-02-15 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH180692A (en)

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