CH121973A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121973A
CH121973A CH121973DA CH121973A CH 121973 A CH121973 A CH 121973A CH 121973D A CH121973D A CH 121973DA CH 121973 A CH121973 A CH 121973A
Authority
CH
Switzerland
Prior art keywords
brown
amino
preparation
dye
naphthol
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 CH121973A publication Critical patent/CH121973A/en

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Description

  

  Verfahren zur Darstellung eines     Entwicklerfarbstoffes.       Es wurde gefunden, dass ein wertvoller       Entwicklerfarbstoff    erhalten wird, wenn man       tetrazotiertes        o-Tolidin    in molekularem Ver  hältnis mit     3'-Amino-4'-methyl-5'-sulfo-l-phe-          nyl-5-pyrazolon-3-karbonsäure    zu einem Zwi  schenprodukt vereinigt und dasselbe in alka  lischer Lösung mit     2-Amino-8-naphtol-6-sulfo-          säure        weiterkuppelt.     



  Der neue Farbstoff bildet ein braun  schwarzes Pulver, das sich in Wasser mit       violettbrauner,    in konzentrierter Schwefelsäure  mit blauer Farbe löst. Er färbt urgebeizte  Baumwolle in     violettbraunen    Tönen, welche  sich durch     Diazotieren    auf der Faser und  nachfolgende Entwicklung mit     P-Naphtol    zu  waschechtem Schokoladebraun fixieren lassen.

      <I>Beispiel:</I>  Zu der     Tetrazolösung    aus 21,2 Teilen       o-Tolidin    lässt man     bei.0-5     C die neutral  gestellte Lösung des     Trinatriumsalzes    von  31,3 Teilen     3'-Amino-4'-methyl-5'-sulfo-l-phe-          nyl-5-pyrazolon-3-karbonsäure    zufliessen. So  bald unveränderte     Tetrazoverbindung    nicht  mehr nachweisbar ist, gibt man die Lösung    von 20 Teilen     kalzinierter    Soda und hierauf  die schwach     phenolphtaleinalkalische    Lösung  von 23,9 Teilen     2-Amino-8-naphtol-6-sulfo-          säure    zu.

   Die Kombination ist nach wenigen  Stunden beendigt. Es wird alsdann aufge  kocht und der Farbstoff     ausgesalzen.  



  Process for the preparation of a developer dye. It has been found that a valuable developer dye is obtained if tetrazotized o-tolidine is used in a molecular ratio with 3'-amino-4'-methyl-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid combined to form an intermediate product and coupled further in alkaline solution with 2-amino-8-naphthol-6-sulfonic acid.



  The new dye forms a brown-black powder that dissolves in water with a purple-brown color, and in concentrated sulfuric acid with a blue color. It dyes primed cotton in violet-brown shades, which can be fixed to washable chocolate brown by diazotizing the fiber and then developing it with P-naphthol.

      <I> Example: </I> The neutral solution of the trisodium salt of 31.3 parts of 3'-amino-4'-methyl-5 is added to the tetrazo solution of 21.2 parts of o-tolidine at 0-5 C '-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid flow in. As soon as unchanged tetrazo compound is no longer detectable, the solution of 20 parts of calcined soda and then the weakly phenolphthalein-alkaline solution of 23.9 parts of 2-amino-8-naphthol-6-sulfonic acid are added.

   The combination ends after a few hours. It is then boiled and the dye is salted out.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Entwick- lerfarbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes o-Tolidin in. molekularem Verhältnis mit .3'-Amino-4'-methyl-5'-sulfo-l- phenyl-5-pyrazolon-3-karbonsäure zu einem Zwischenprodukt vereinigt und dasselbe in alkalischer Lösung mit 2-Amino-8-naphtol-6- sulfosäure weiterkuppelt. Der neue Farbstoff bildet ein braun schwarzes Pulver, das sich in Wasser mit violettbrauner, in konzentrierter Schwefelsäure mit blauer Farbe löst. Claim: method for the preparation of a developer dye, characterized in that tetrazotized o-tolidine is mixed in a molecular ratio with .3'-amino-4'-methyl-5'-sulfo-1-phenyl-5-pyrazolone-3- carbonic acid combined to form an intermediate product and the same coupled further in alkaline solution with 2-amino-8-naphthol-6-sulfonic acid. The new dye forms a brown-black powder that dissolves in water with a purple-brown color, and in concentrated sulfuric acid with a blue color. Er färbt urgebeizte Baumwolle in violettbraunen Tönen, welche sich durch Diazotieren auf der Faser und nachfolgende Entwicklung mit f-Naphtol zu waschechtem Schokoladebraun fixieren lassen. It dyes originally stained cotton in violet-brown tones, which can be fixed to washable chocolate brown by diazotizing the fiber and then developing it with f-naphtol.
CH121973D 1925-10-17 1926-05-25 Process for the preparation of a developer dye. CH121973A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH119229T 1925-10-17
GB121973X 1926-02-19

Publications (1)

Publication Number Publication Date
CH121973A true CH121973A (en) 1927-08-01

Family

ID=25709204

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121973D CH121973A (en) 1925-10-17 1926-05-25 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121973A (en)

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