CH121013A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121013A
CH121013A CH121013DA CH121013A CH 121013 A CH121013 A CH 121013A CH 121013D A CH121013D A CH 121013DA CH 121013 A CH121013 A CH 121013A
Authority
CH
Switzerland
Prior art keywords
phenyl
preparation
dye
purple color
pyrazolone
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
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 Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH121013A publication Critical patent/CH121013A/en

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Description

  

  Verfahren zur Darstellung eines     Entwicklerfarbstoffes.       Es wurde gefunden, dass ein wertvoller       Entwicklerfarbstoff    erhalten wird, wenn man       tetrazotiertes        Dianisidin    in molekularem Ver  hältnis mit     2'-Methyl-3'-amino-5'-sulfo-l-phe-          nyl-5-pyrazolon-3-karbonsäure    zu einem Zwi  schenprodukt vereinigt und dasselbe in alka  lischer Lösung mit     1-Phenyl-3-methyl-5-pyra-          zolon        weiterkuppelt.    Der neue Farbstoff bildet  ein rotbraunes Pulver, das sich in Wasser  mit blauroter, in konzentrierter Schwefelsäure  mit violetter Farbe löst.

   Er färbt ungeheizte  Baumwolle in bordeauxroten Tönen, welche  durch     Diazotieren    auf der Faser und nachfol  gende Entwicklung mit     Betanaphtol    ohne we  sentliche     Nuancenänderung    waschecht fixiert  werden.  



       Beispiel:     Zu der     Tetrazodianisyllösung    aus 24,4 Tei  len     o-Dianisidin    lässt man bei     0-50    C die  Lösung des     Trinatriumsalzes    von 31,3 Teilen       2'-Methyl-3'-amino-5'-sulfo-l-phenyl-5-pyrazo-          lon-3-karbonsäure    zufliessen. Sobald unverän  derte     Tetrazoverbindung    nicht mehr nachge  wiesen werden kann, gibt man die Lösung  von 20 Teilen     kalzinierter    Soda und hierauf  die schwach     natronalkalische    Lösung von    17,4 Teilen     1-Phenyl-3-methyl-5-pyrazolon    zu.

    Nach wenigen Stunden ist die Kombination  beendigt; man wärmt auf 50  C an, neutra  lisiert die überschüssige Soda mit Salzsäure  und salzt den     Farbstoff    aus.



  Process for the preparation of a developer dye. It has been found that a valuable developer dye is obtained if tetrazotized dianisidine is in a molecular ratio with 2'-methyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid Intermediate product combined and the same in alkaline solution with 1-phenyl-3-methyl-5-pyrazolone coupled on. The new dye forms a red-brown powder that dissolves in water with a blue-red color, and in concentrated sulfuric acid with a purple color.

   It dyes unheated cotton in burgundy shades, which are fixed by diazotization on the fiber and subsequent development with betanaphtol without significant changes in nuance.



       Example: The solution of the trisodium salt of 31.3 parts of 2'-methyl-3'-amino-5'-sulfo-1-phenyl-5 is added to the tetrazodianisyl solution of 24.4 parts of o-dianisidine at 0-50 ° C -pyrazolone-3-carboxylic acid flow in. As soon as unchanged tetrazo compound can no longer be detected, the solution of 20 parts of calcined soda and then the weakly alkaline sodium solution of 17.4 parts of 1-phenyl-3-methyl-5-pyrazolone are added.

    The combination is over after a few hours; the mixture is warmed to 50 C, the excess soda is neutralized with hydrochloric acid and the dye is salted out.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Entwick- lerfarbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes ö-Dianisidin in moleku larem Verhältnis mit 2'-Dlethyl-3'-amino-5'- sulfo-l-phenyl-5-pyrazoloi)-3-karbon'säure zu einem Zwischenprodukt vereinigt und das selbe in alkalischer Lösung mit 1-Phenyl-3- methyl-5-pyrazolon weiterkuppelt. Der neue Farbstoff bildet ein rotbraunes Pulver, das sich in Wasser mit blauroter, in konzentrier ter Schwefelsäure mit violetter Farbe löst. PATENT CLAIM: Process for the preparation of a developer dye, characterized in that tetrazotized δ-dianisidine in a molecular ratio with 2'-Dlethyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazoloi) -3- carbonic acid combined to an intermediate product and the same in alkaline solution with 1-phenyl-3-methyl-5-pyrazolone coupled. The new dye forms a red-brown powder that dissolves in water with a purple color and in concentrated sulfuric acid with a purple color. Er färbt ungeheizte Baumwolle in bordeaux roten Tönen, welche durch Diazotieren auf der Faser und nachfolgende Entwicklung mit Betanaphtol ohne wesentliche Nuancenände- r ung waschecht fixiert werden. It dyes unheated cotton in burgundy red tones, which are fixed by diazotizing on the fiber and subsequent development with betanaphthol without any significant change in shade.
CH121013D 1925-03-28 1925-11-02 Process for the preparation of a developer dye. CH121013A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE121013X 1925-03-28
CH119229T 1925-10-17

Publications (1)

Publication Number Publication Date
CH121013A true CH121013A (en) 1927-06-16

Family

ID=25709197

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121013D CH121013A (en) 1925-03-28 1925-11-02 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121013A (en)

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