CH292652A - Process for the preparation of a substantive azo dye. - Google Patents

Process for the preparation of a substantive azo dye.

Info

Publication number
CH292652A
CH292652A CH292652DA CH292652A CH 292652 A CH292652 A CH 292652A CH 292652D A CH292652D A CH 292652DA CH 292652 A CH292652 A CH 292652A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
reddish
azo dye
substantive azo
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH292652A publication Critical patent/CH292652A/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
    • C09B35/04—Disazo dyes characterised by the tetrazo component the tetrazo component being a benzene derivative

Landscapes

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

Description

  

  Zusatzpatent     zum    Hauptpatent Nr. 287869.    Verfahren     zur        Herstellung    eines     Substantiven        Azofarbatoffes.            l...rde    gefunden, dass man zu einem  wertvollen Substantiven     Azofarbstoff    gelangt,  wenn man eine     Diazoverbindung    des     Amino-          inonoazofarbstoffes    der Formel  
EMI0001.0011     
         reit    2-     (4'-Methoxy)-phenylamino-5-oxynaph-          tlialin-7-sulfonsäure    kuppelt.  



  Der neue Farbstoff ist ein dunkles Pulver,       (las    sich in Wasser mit     rötlichblauer    Farbe  löst und natürliche     Cellulosefasern    und solche  aus regenerierter     Cellulose    aus     natriumsulfat-          haltigem    Bade in violetten Tönen färbt, die  durch Behandlung mit Kupfersalzen in sehr  gut wasch-     und        liehtechte,        rötliehblaue    Fär  bungen übergehen..  



  Die Kupplung der     Diazoverbindung    mit       der    \'-     (4'-Metlioxy)-phenylamino-5-oxynaph-          tlializi-7-sttlfonsäure    kann nach den für die       Kupplung    derartiger     Azokomponenten    an sich       bekannten    und gebräuchlichen Methoden,       zweckmässig    in alkalischem Medium, erfolgen.

         Beispiel:     Die 30,8 Teilen entsprechende Menge an       feuchter    Paste des     Aminoazofarbstoffes    der  Formel  
EMI0001.0035     
    wird als     Alkalisalz    in 500 Teilen Wasser ge  löst, mit 7 Teilen     Natriumnitrit    versetzt und  nach Zugabe von Eis mit 32 Teilen konzen-         trierter    Salzsäure angesäuert. Nach einigen  Minuten ist die     Diazotierung    beendet.

   Man  lässt die     Diazoverbindung    zu einer eiskalten  Lösung aus 35 Teilen     2-(4'-Methoxy)-phenyl-          amino-5-oxynaphthalin-7-sulfonsäure    und 50  Teilen wasserfreiem     Natriumcarbonat    in 400  Teilen Wasser fliessen,     rührt    einige     Stunden     und erwärmt auf 65 . Mit     Natriumehlorid     kann der     Disazofarbstoff    vollständig gefällt  werden. Er wird filtriert und getrocknet.



  Additional patent to main patent No. 287869. Process for the production of a noun Azofarbatoffes. l ... rde found that one arrives at a valuable noun azo dye if one uses a diazo compound of the amino inonoazo dye of the formula
EMI0001.0011
         reit 2- (4'-methoxy) -phenylamino-5-oxynaph-tlialin-7-sulfonic acid couples.



  The new dye is a dark powder that dissolves in water with a reddish-blue color and colors natural cellulose fibers and those made from regenerated cellulose from a bath containing sodium sulfate in violet tones, which, when treated with copper salts, turn them into a very washable, reddish-blue color skip exercises ..



  The coupling of the diazo compound with the \ '- (4'-Metlioxy) -phenylamino-5-oxynaph- tlializi-7-sttlfonsäure can be carried out according to the known and customary methods for the coupling of such azo components, suitably in an alkaline medium.

         Example: The amount of moist paste of the aminoazo dye of the formula corresponding to 30.8 parts
EMI0001.0035
    is dissolved as the alkali salt in 500 parts of water, 7 parts of sodium nitrite are added and, after the addition of ice, it is acidified with 32 parts of concentrated hydrochloric acid. The diazotization is complete after a few minutes.

   The diazo compound is allowed to flow into an ice-cold solution of 35 parts of 2- (4'-methoxy) -phenyl-amino-5-oxynaphthalene-7-sulfonic acid and 50 parts of anhydrous sodium carbonate in 400 parts of water, stirred for a few hours and heated to 65. The disazo dye can be completely precipitated with sodium chloride. It is filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Substan tiven Azofarbstoffes, dadurch gekennzeichnet, dass man eine Diazoverbindung des Amino- monoazofarbstoffes der Formel EMI0001.0053 mit 2- (4'-Methoxy)-phenylamino-5-oxynaph- thalin-7-sulfonsäure kuppelt. PATENT CLAIM: Process for the preparation of a substantive azo dye, characterized in that a diazo compound of the amino monoazo dye of the formula EMI0001.0053 with 2- (4'-methoxy) -phenylamino-5-oxynaphthalene-7-sulfonic acid. Der neue Farbstoff ist ein dunkles Pulver, das sich in Wasser mit rötlichblauer Farbe löst und natürliche Celhilosefasern und solche aus regenerierter Cellulose aus natriumsulfat- haltigem Bade in violetten Tönen färbt, die durch Behandlung mit Kupfersalzen in sehr gut wasch- und lichtechte, rötlichblaue Fär bungen übergehen. UNTERANSPRUCH: Verfahren gemäss Patentanspruch, da durch gekennzeichnet, dass man die Kupplung in alkalischem Medium durchführt. The new dye is a dark powder that dissolves in water with a reddish-blue color and colors natural celhilose fibers and those made from regenerated cellulose from a bath containing sodium sulfate in violet shades, which, when treated with copper salts, turn very washable and lightfast, reddish-blue colors pass over. SUBClaim: Method according to claim, characterized in that the coupling is carried out in an alkaline medium.
CH292652D 1950-06-28 1950-06-28 Process for the preparation of a substantive azo dye. CH292652A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH292652T 1950-06-28
CH287869T 1951-05-11

Publications (1)

Publication Number Publication Date
CH292652A true CH292652A (en) 1953-08-15

Family

ID=25732759

Family Applications (1)

Application Number Title Priority Date Filing Date
CH292652D CH292652A (en) 1950-06-28 1950-06-28 Process for the preparation of a substantive azo dye.

Country Status (1)

Country Link
CH (1) CH292652A (en)

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