CH121972A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121972A
CH121972A CH121972DA CH121972A CH 121972 A CH121972 A CH 121972A CH 121972D A CH121972D A CH 121972DA CH 121972 A CH121972 A CH 121972A
Authority
CH
Switzerland
Prior art keywords
brown
amino
preparation
dye
developer
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 CH121972A publication Critical patent/CH121972A/en

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Description

  

      Verfahren    zur Darstellung eines     Entwieklerfarbstoffes.       Es wurde gefunden, dass ein wertvoller       Entwicklerfarbstoff    erhalten wird, wenn man       tetrazotiertes        Benzidin    in     molekularem    Ver  hältnis mit     3'-Amino-4'-inethyl-5'-sulfo-l-phe-          riyl-5-pyrazolon-3-karbonsäure    zu einem Zwi  schenprodukt vereinigt und dasselbe in alka  lischer Lösung mit     2-Amino-8-riaphtol-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     ungebeizte     Baumwolle in     violettbraunen    Tönen, welche  sich durch     Diazotieren    auf der Faser und  nachfolgende Entwicklung mit     P-hlaphtol    zu  waschechtem Schokoladebraun fixieren lassen.         Beispiel   <I>.</I>  



  Zu der     Tetrazolösung    aus 18,4 Teilen       Benzidin    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     aldann    aufgekocht  und der Farbstoff     ausgesalzen.  



      Process for the preparation of a developer dye. It has been found that a valuable developer dye is obtained when tetrazotized benzidine is in a molecular ratio with 3'-amino-4'-ynethyl-5'-sulfo-1-pheriyl-5-pyrazolone-3-carboxylic acid Intermediate product combined and the same coupled further in alkali solution with 2-amino-8-riaphthol-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 unstained cotton in violet-brown tones, which can be fixed to washable chocolate brown by diazotizing the fiber and then developing it with P-hlaphtol. Example <I>. </I>



  The neutral solution of the trisodium salt of 31.3 parts of 3'-amino-4'-methyl-5'-sulfo-1-phenyl-5- is added to the tetrazo solution of 18.4 parts of benzidine at 0-5 ° 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 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 Benzidin 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, PATENT CLAIM: Process for the preparation of a developer dye, characterized in that tetrazotized benzidine is converted into an intermediate product in a molecular ratio with 3'-amino-4'-methyl-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid combined and the same in alkaline solution with 2-amino-8-naphthol-6-sulfonic acid coupled. The new dye forms a brown-black powder that turns into purple-brown, in konzentrierter Schwefelsäure mit blauer Farbe löst. Er färbt ungebeizte Baumwollein violettbraunen Tönen, welche sich durch Diazotieren auf der Faser und nachfol gende Entwicklung mit f-Naphtol zu wasch echtem Schokoladebraun fixieren lassen. dissolves in concentrated sulfuric acid with a blue color. It dyes unstained cotton in violet-brown shades, which can be fixed to a real chocolate brown by diazotizing the fiber and then developing it with f-naphtol.
CH121972D 1925-10-17 1926-05-25 Process for the preparation of a developer dye. CH121972A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH119229T 1925-10-17
GB121972X 1926-02-19

Publications (1)

Publication Number Publication Date
CH121972A true CH121972A (en) 1927-08-01

Family

ID=25709203

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121972D CH121972A (en) 1925-10-17 1926-05-25 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121972A (en)

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