CH184484A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH184484A
CH184484A CH184484DA CH184484A CH 184484 A CH184484 A CH 184484A CH 184484D A CH184484D A CH 184484DA CH 184484 A CH184484 A CH 184484A
Authority
CH
Switzerland
Prior art keywords
new
preparation
azo dye
good
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 CH184484A publication Critical patent/CH184484A/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
    • C09B29/02—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

  

  Zusatzpatent zum     Hauptpatent    Nr. 180692.    Verfahren zur Darstellung eines     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    von wertvollen Eigenschaften er  hält, wenn man dianotiertes     5-Nitro-2-amino-          1-phenol    mit     3-Methyl-l-rnono-dioxypropyl-          aminobenzol,    wie es erhalten werden kann  durch Kondensation von     m-Toluidin    mit     a-          Chlordioxypropan,    vereinigt.  



  Der neue     Farbstoff    ist ein in Wasser un  lösliches, dunkelrotes Pulver, das in Aceton  mit roter und in konzentrierter Schwefelsäure  mit braungelber     Farbe    löslich ist. Er färbt       Acetatseide    nach üblichem Verfahren auf  Grund seines guten Ziehvermögens und seiner  hervorragenden Löslichkeit in kräftigen roten  Tönen, die sich durch ihre grosse Reinheit  und Schönheit 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    werden  mit 300 Teilen Wasser vermahlen; die er  haltene Suspension wird mit 25 Teilen kon  zentrierter Salzsäure und 7 Teilen     Natrium-          uitrit    dianotiert und die so bereitete Diazo-         lösung    mit einer Lösung von 18,1 Teilen 3       Methyl-1-    mono -     dioxypropylaminobenzol    in  verdünnter Salzsäure vereinigt. Der nach  längerem Rühren ausgeschiedene Farbstoff  wird filtriert und gewaschen.



  Additional patent to main patent No. 180692. Process for the preparation of an azo dye. It has been found that a new azo dye of valuable properties is obtained if you dianotated 5-nitro-2-amino-1-phenol with 3-methyl-l-mono-dioxypropyl-aminobenzene, as can be obtained by condensation of m-Toluidine with a-chlorodioxypropane, combined.



  The new dye is a dark red powder which is insoluble in water and which is soluble in acetone with a red color and in concentrated sulfuric acid with a brownish-yellow color. Due to its good drawability and its excellent solubility, it dyes acetate silk in strong 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-1-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 uitrite and the diazo solution thus prepared is combined with a solution of 18.1 parts of 3-methyl-1-mono-dioxypropylaminobenzene 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-amino.l-phenol mit 3-Metliyl-l-mono-dioxypropylami n ob enzol, wie es erhalten werden kann durch Kondensation von m-Toluidin mit a-Chlordioxypropan, ver einigt. Der neue Farbstoff ist ein in Wasser unlösliches, dunkelrotes Pulver, das in Aceton mit roter und in konzentrierter Schwefelsäure mit braungelber Farbe löslich ist. PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that dianotated 5-nitro-2-amino.l-phenol with 3-methyl-l-mono-dioxypropylami n ob enzene, as it can be obtained by condensation of m- Toluidine with a-chlorodioxypropane, united ver. The new dye is a water-insoluble, dark red powder that is soluble in acetone with a red color and in concentrated sulfuric acid with a brownish-yellow color. Er färbt Acetatseide nachüblichem Verfahren auf Grund seines guten Ziehvermögens und seiner her vorragenden Löslichkeit in kräftigen roten Tönen, die sich. durch ihre grosse Reinheit und Schönheit auszeichnen. Die Färbungen zeigen gute Echtheitseigenschaften und sind rein weiss ätzbar. Das neue Produkt ist auch ein gutes Färbemittel für Lacke. He dyes acetate silk by the usual method due to its good drawability and its excellent solubility in strong 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.
CH184484D 1935-02-15 1935-02-15 Process for the preparation of an azo dye. CH184484A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH180692T 1935-02-15
CH184484T 1935-02-15

Publications (1)

Publication Number Publication Date
CH184484A true CH184484A (en) 1936-05-31

Family

ID=25720448

Family Applications (1)

Application Number Title Priority Date Filing Date
CH184484D CH184484A (en) 1935-02-15 1935-02-15 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH184484A (en)

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