CH215403A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH215403A
CH215403A CH215403DA CH215403A CH 215403 A CH215403 A CH 215403A CH 215403D A CH215403D A CH 215403DA CH 215403 A CH215403 A CH 215403A
Authority
CH
Switzerland
Prior art keywords
production
azo dye
amino
new azo
new
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH215403A publication Critical patent/CH215403A/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/35—Trisazo dyes in which the tetrazo component is a diamino-azo-aryl compound

Landscapes

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

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoffes.       <B>ES</B> wurde ,gefunden,     d@ass    man einen neuen       Azofarbstoff    erhält, wenn man     4-Amino-2-          methylbenzol        -1,1'-        azo-(4'-        amino)-naphthalin          tetrazotiert    und die so entstandene     Tetrazo-          verbindung    mit     2,3-Ogynaphthoesäure    kup  pelt.

   Der so erhaltene     schwarze    Pigmentfarb  stoff zeichnet sich durch, seine Ausgiebig  keit und     Lichtechtheit    aus. Auf :geeigneten  Unterlagen, zum Beispiel     Acetylcellulose,     hergestellt, färbt er diese in echten schwar  zen Tönen.  



  <I>Beispiel:</I>  276 'teile     4-Amino-2-methylbenzol-1,1'-          azo-(4'-amino)-naphthalin    werden wie üblich  durch Lösen in 500 Teilen konzentrierter       Salzsäure    und     Versetzen    mit einer     wIsseri-          gen    Lösung von 138 Teilen     Natriumnitrit          tetrazotiert.    Die so erhaltene     Dia.zolösung     wird in einer feinen, überschüssiges Natrium-         acetat    enthaltenden Suspension von 376 Tei  len     2,3-Ogynaphthoesäure    eingetragen.

   Man  rührt bis die     2,3-Ogynaphthoessäure        beinahe     verschwunden ist, filtriert und trocknet.



  Process for the production of a new azo dye. It has been found that a new azo dye is obtained if 4-amino-2-methylbenzene -1,1'-azo- (4'-amino) -naphthalene is tetrazotized and the like The resulting tetrazo compound is coupled with 2,3-ogynaphthoic acid.

   The black pigment dye obtained in this way is characterized by its abundance and lightfastness. Produced on a suitable base, e.g. acetyl cellulose, he colors them in real black tones.



  <I> Example: </I> 276 parts of 4-amino-2-methylbenzene-1,1'-azo- (4'-amino) -naphthalene are prepared as usual by dissolving them in 500 parts of concentrated hydrochloric acid and adding a water - Tetrazotized against a solution of 138 parts of sodium nitrite. The dialysis solution obtained in this way is introduced into a fine suspension of 376 parts of 2,3-ogynaphthoic acid containing excess sodium acetate.

   The mixture is stirred until the 2,3-ogynaphthoic acid has almost disappeared, filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch .gekennzeichnet, dass man 4-Amino - 2 - methylbenzol -1,1'- azo-(4'- amino)-naphthalin tetrazotiert und die so entstandene Tetrazoverbindung mit 2,3-Ogy- naphthoesäure kuppelt. PATENT CLAIM: Process for the production of a new azo dye, characterized in that 4-amino-2-methylbenzene -1,1'-azo- (4'-amino) -naphthalene is tetrazotized and the resulting tetrazo compound with 2,3-Ogy - naphthoic acid couples. Der .so erhaltene schwarze Pigmentfarbstoff zeichnet sich durch seine Ausgiebigkeit und Lichtechtheit aus. Auf geeigneten Unterlagen, zum Bei spiel Aoetylcellulose, hergestellt, färbt er diese in echten schwarzen Tönen. The black pigment obtained in this way is distinguished by its abundance and lightfastness. Produced on suitable substrates, for example acetyl cellulose, he colors them in real black tones.
CH215403D 1940-02-09 1940-02-09 Process for the production of a new azo dye. CH215403A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH215403T 1940-02-09

Publications (1)

Publication Number Publication Date
CH215403A true CH215403A (en) 1941-06-30

Family

ID=4449110

Family Applications (1)

Application Number Title Priority Date Filing Date
CH215403D CH215403A (en) 1940-02-09 1940-02-09 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH215403A (en)

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