CH192981A - Process for the preparation of an azo dye which is capable of forming metal compounds. - Google Patents

Process for the preparation of an azo dye which is capable of forming metal compounds.

Info

Publication number
CH192981A
CH192981A CH192981DA CH192981A CH 192981 A CH192981 A CH 192981A CH 192981D A CH192981D A CH 192981DA CH 192981 A CH192981 A CH 192981A
Authority
CH
Switzerland
Prior art keywords
blue
dye
azo dye
metal compounds
forming metal
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 CH192981A publication Critical patent/CH192981A/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
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/34—Disazo dyes characterised by the tetrazo component the tetrazo component being heterocyclic

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 188320.    Verfahren zur Herstellung eines     Azofarbstoffes,    der zur Bildung  von Metallverbindungen befähigt ist..    Vorliegendes Patent bezieht     sich    .auf ein  Verfahren zur Herstellung eines     Azofarbstof-          fes,    der zur Bildung von Metallverbindungen  befähigt ist,     dadurch    gekennzeichnet, dass  man     2.6-Dimethyl-4-amino-7-acetylamino-          benzthiazol        diazotiert,    mit     1-Naphthol-3.6-          disulfosäure    kuppelt,

   den erhaltenen     Mono-          azofarbstoff    verseift,     diazotiert    und mit 2  Phenylamino-5-naphthol-7-sulfosäurekuppelt.  



  Der so erhaltene Farbstoff     stellt    ein grau  schwarzes Pulver dar, das sich in konzen  trierter Schwefelsäure blaugrün und in Was  ser blau löst. Auf Baumwolle gefärbt, er  hält man ein gut ziehendes lebhaftes Blau.  Lässt man auf den Farbstoff Kupfersulfat  in essigsaurem Medium einwirken, so wird  weder die Lösungsfarbe in Wasser noch die  in konzentrierter Schwefelsäure verändert.  Auch die Färbung auf Baumwolle behält  den lebhaften Blauton, wogegen die Licht  echtheit ganz bedeutend verbessert wird.

      <I>Beispiel:</I>  23,5 Teile 2. 6 -     Dimethyl    - 4 -     amino    - 7     -          acetylaminobenzthiazol    werden in salzsaurer  Lösung mit     Natriumnitrit    wie üblich     di-          azotiert    und in Gegenwart von Soda mit  31 Teilen     1-Naphthol-3.6-,disulfosäure    ge  kuppelt. Durch     Aussalzen    wird der     Mono-          azofarbstoff    abgeschieden. Zur     Verseifung     der     Acetylaminogruppe    wird er in einer  10%igen Schwefelsäure 2 Stunden bei 95   C  gerührt.

   Der abgeschiedene     Aminoazofarb-          stoff    wird mit .der nötigen Menge Natron  lauge wieder in Lösung gebracht, mit 7 Tei  len     Natriumnitrit    versetzt und durch Zugabe  von 36 Teilen Salzsäure 19 bis 2,0       Be    bei  0   bis     -f-    5   in die     Diazoverbindung    über  geführt. Diese wird in     sodaalkalischer    Lö  sung mit 24 Teilen     2-Phenylamino-5-naph-          thol-7-sulfosäure    gekuppelt. Der Farbstoff  wird abgeschieden und getrocknet.



  <B> Additional patent </B> to main patent No. 188320. Process for the production of an azo dye capable of forming metal compounds. The present patent relates to a process for the production of an azo dye capable of forming metal compounds is, characterized in that 2.6-dimethyl-4-amino-7-acetylamino-benzothiazole is diazotized, coupled with 1-naphthol-3.6-disulfonic acid,

   the monoazo dye obtained is saponified, diazotized and coupled with 2-phenylamino-5-naphthol-7-sulfonic acid.



  The dye thus obtained is a gray-black powder which dissolves blue-green in concentrated sulfuric acid and blue in water. Dyed on cotton, it is given a vivid blue that draws well. If the dye copper sulfate is left to act in an acetic acid medium, neither the solution color in water nor that in concentrated sulfuric acid is changed. The dyeing on cotton also retains the lively shade of blue, whereas the light fastness is significantly improved.

      <I> Example: </I> 23.5 parts of 2. 6 - dimethyl - 4 - amino - 7 - acetylaminobenzothiazole are azotized in hydrochloric acid solution with sodium nitrite as usual and in the presence of soda with 31 parts of 1-naphthol-3.6 -, disulfonic acid coupled. The monoazo dye is deposited by salting out. To saponify the acetylamino group, it is stirred in 10% sulfuric acid at 95 ° C. for 2 hours.

   The deposited aminoazo dye is redissolved with the necessary amount of sodium hydroxide solution, 7 parts of sodium nitrite are added and 36 parts of hydrochloric acid 19 to 2.0 Be at 0 to -f-5 are converted into the diazo compound. This is coupled in a soda-alkaline solution with 24 parts of 2-phenylamino-5-naphthol-7-sulfonic acid. The dye is deposited and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, der zur Bildung von Metallverbin dungen befähigt ist, dadurch gekennzeich net, dass man 2.6-Dimethyl-4-amino-7-ace- tylaminobenzthiazol diazotiert, mit 1-Naph- thol-3--'6",disulfosäure kuppelt, den erhaltenen Azofarbstoff verseift, diazotiert und mit 2 Phenylamino-5-naphthol-7-sulfosäurekuppelt. PATENT CLAIM: Process for the production of an azo dye which is capable of forming metal compounds, characterized in that 2,6-dimethyl-4-amino-7-acetylaminobenzothiazole is diazotized with 1-naphthol-3-- '6 ", disulfonic acid couples, the resulting azo dye is saponified, diazotized and coupled with 2-phenylamino-5-naphthol-7-sulfonic acid. Der so erhaltene Farbstoff stellt ein grau schwarzes Pulver dar, das sich in konzen- trierter Schwefelsäure blaugrün und in Was- ser blau löst. Auf Baumwolle gefärbt, er hält man ein gut ziehendes lebhaftes Blau. Lässt man auf den Farbstoff Kupfersulfat in essigsaurem Medium einwirken, so wird weder die Lösungsfarbe in Wasser noch die in konzentrierter Schwefelsäure verändert. Auch die Färbung auf Baumwolle behält .den lebhaften Blauton, wogegen die Licht echtheit ganz bedeutend verbessert wird. The dye obtained in this way is a gray-black powder which dissolves blue-green in concentrated sulfuric acid and blue in water. Dyed on cotton, it is given a vivid blue that draws well. If the dye copper sulfate is left to act in an acetic acid medium, neither the solution color in water nor that in concentrated sulfuric acid is changed. The dyeing on cotton also retains the lively shade of blue, whereas the light fastness is significantly improved.
CH192981D 1935-01-04 1935-12-18 Process for the preparation of an azo dye which is capable of forming metal compounds. CH192981A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE192981X 1935-01-04
CH188320T 1935-12-18

Publications (1)

Publication Number Publication Date
CH192981A true CH192981A (en) 1937-09-15

Family

ID=25721630

Family Applications (1)

Application Number Title Priority Date Filing Date
CH192981D CH192981A (en) 1935-01-04 1935-12-18 Process for the preparation of an azo dye which is capable of forming metal compounds.

Country Status (1)

Country Link
CH (1) CH192981A (en)

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