CH235458A - Process for the preparation of a water-soluble monoazo dye. - Google Patents

Process for the preparation of a water-soluble monoazo dye.

Info

Publication number
CH235458A
CH235458A CH235458DA CH235458A CH 235458 A CH235458 A CH 235458A CH 235458D A CH235458D A CH 235458DA CH 235458 A CH235458 A CH 235458A
Authority
CH
Switzerland
Prior art keywords
water
preparation
monoazo dye
soluble monoazo
dye
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 CH235458A publication Critical patent/CH235458A/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     wasserlösliehen        Honoazofarbstoffes.       Nach :dem im     Hauptpatent    beschriebenen  Verfahren erhält man einen Leder in gelb  braunen Tönen     einheitlich    durchfärbenden  Farbstoff von guter Licht-, Säure- und  Wasserechtheit, wenn man     1-Amino-2-chlor-          4-nitrobenzol-6-sulfosäure        diazotiert        und    die       Diazoverbindung    mit     Phenylamiuodi        (äthan-          sulfonsäure)    der Formel  
EMI0001.0013     
    kuppelt.

    Wie nun weiter gefunden wurde, erhält  man einen Farbstoff von ähnlichen Eigen  schaften, wenn man     1-Amino-2-brom-4-nitro-          benzol=6-sulfon6äure        diazotiert    und die     Di-          azoverbindung        mit        34Methylphenylaminodi          (äthansulfonsäure)    der Formel  
EMI0001.0022     
    kuppelt.

      <I>Beispiel:</I>  31,9, Teile     1-a@mino-2-brom-4-nitrobenzol-          6    -     sulfonsaures    Natrium werden mit 300  Teilen Wasser und 5,0 Teilen Salzsäure von  12"     B.6    mehrere Stunden in der Porzellan  mühle gekollert und hierauf ei 0-5  mit  einer     wässrigen    Lösung von 7 Teilen Na  triumnitrit     diazötiert.    Nach etwa 3 Stunden  ist die     Diazotierung    beendet.

   Die     Diazo-          verbindung        wird    hierauf in eine mit Eis  versetzte,     wässrig    e,     essigsaure    Lösung des       Natriumsalzes    der     3-Methylplienylaminodi          (äthansulfonsäure)    gegossen und zur Beendi  gung der Kupplung mit     Natriumacetat    ab  gestumpft. Der Farbstoff färbt Leder in rot  braunen Tönen einheitlich     ,durch    und besitzt  sehr gute     Echtheitseigenschaften.  



  Process for the production of a water-soluble honoazo dye. According to: the process described in the main patent, a leather in yellow-brown shades is obtained which is uniformly through-coloring and has good fastness to light, acid and water if 1-amino-2-chloro-4-nitrobenzene-6-sulfonic acid is diazotized and the diazo compound is diazotized Phenylamiuodi (ethane sulfonic acid) of the formula
EMI0001.0013
    clutch.

    As has now also been found, a dye with similar properties is obtained if 1-amino-2-bromo-4-nitrobenzene = 6-sulfonic acid is diazotized and the di-azo compound is diazotized with 34-methylphenylamino-di (ethanesulfonic acid) of the formula
EMI0001.0022
    clutch.

      <I> Example: </I> 31.9, parts of 1-a @ mino-2-bromo-4-nitrobenzene-6-sulfonic acid sodium are mixed with 300 parts of water and 5.0 parts of hydrochloric acid of 12 "B.6 several Poured in a porcelain mill for hours and then diazotized with an aqueous solution of 7 parts of sodium nitrite at 0-5. The diazotization is complete after about 3 hours.

   The diazo compound is then poured into an aqueous, acetic acid solution of the sodium salt of 3-methylplienylamino di (ethane sulfonic acid) mixed with ice and blunted with sodium acetate to complete the coupling. The dye dyes leather uniformly in red-brown tones and has very good fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren. zur Herstellung eines wasser- löslichen Monoazofarbstoffes, dadurch ge kennzeichnet, dass man 1-Amino-2=brom-4- nitrobenzal-6-sulfonsäure dianotiert und die Diazoverbindung mit 3-Methylphenylaminodi (äthansulfonsäure) der Formel EMI0002.0004 kuppelt. Der neue Farbstoff färbt Leder in rot braunen Tönen einheitlich .durch und besitzt sehr gute Echtheitseigenschaften. PATENT CLAIM: Process. for the preparation of a water-soluble monoazo dye, characterized in that 1-amino-2 = bromo-4-nitrobenzal-6-sulfonic acid is dianotized and the diazo compound with 3-methylphenylaminodi (ethanesulfonic acid) of the formula EMI0002.0004 clutch. The new dye uniformly dyes leather in red-brown tones and has very good fastness properties.
CH235458D 1939-08-24 1942-12-11 Process for the preparation of a water-soluble monoazo dye. CH235458A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE235458X 1939-08-24
CH232888T 1942-12-11

Publications (1)

Publication Number Publication Date
CH235458A true CH235458A (en) 1944-11-30

Family

ID=25727772

Family Applications (1)

Application Number Title Priority Date Filing Date
CH235458D CH235458A (en) 1939-08-24 1942-12-11 Process for the preparation of a water-soluble monoazo dye.

Country Status (1)

Country Link
CH (1) CH235458A (en)

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