CH121007A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121007A
CH121007A CH121007DA CH121007A CH 121007 A CH121007 A CH 121007A CH 121007D A CH121007D A CH 121007DA CH 121007 A CH121007 A CH 121007A
Authority
CH
Switzerland
Prior art keywords
brown
red
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 CH121007A publication Critical patent/CH121007A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

      Verfahren    zur Darstellung eines     Entyvielderfarbstoi%s.       Es wurde gefunden, dass ein wertvoller       Entwicklerfarbstoff    erhalten wird, wenn man       tetrazotiertes        Benzidin    in molekularem Ver  hältnis mit     2'-DIetbyl-3'-amino-5'-sulfo-l-          phenyl-5-pyrazolon-3-karbonsäure    zu einem  Zwischenprodukt vereinigt und dasselbe mit       a-Naphtylaminsulfosäure-1,6-Cleve        weiterkup-          pelt.    Der neue     Farbstoff    bildet ein braun  schwarzes Pulver, -das sich in Wasser mit  rotbrauner,

   in konzentrierter Schwefelsäure  mit blauvioletter Farbe löst. Er färbt     unge-          beizte    Baumwolle in rotbraunen Tönen, welche  sich durch     Diazotieren    auf der Faser und  nachfolgende Entwicklung mit     Betanaphtol     zu waschechtem Schokoladebraun fixieren  lassen.  



  <I>Beispiel:</I>  Zu der     Tetrazodiphenyllösung    aus 18,4  Teilen     Benzidin    lässt     rnan    bei 0-5   C die  Lösung des     Trinatriumsalzes    von 31,3 Teilen 2'       Methyl-3'-amino-5'-sulfo-l-phenyl-5-pyrazolon-          3-karbonsäure    zufliessen. Sobald unverändertes       Tetrazodiphenyl    nicht mehr nachgewiesen  werden kann, gibt man die Lösung von 24,5  Teilen     a-naphtylaminsulfosaurem    Natron-1,6-         Cleve    zu. Es tritt rasch Weiterkupplung ein  unter Bildung eines dicken, schwarzen Nieder  schlages.

   Nach einigen Stunden ist die     Kom-          bination    beendigt. Man neutralisiert sorgfältig  durch Zugabe von Soda - und salzt aus der  hierbei entstehenden rotbraunen Lösung den       Farbstoff    aus.



      Method for the preparation of an Entyvielderfarbstoi% s. It has been found that a valuable developer dye is obtained if tetrazotized benzidine is combined in a molecular ratio with 2'-dietbyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid to form an intermediate and coupled the same with a-naphthylamine sulfonic acid 1,6-Cleve. The new dye forms a brown-black powder, which is mixed in water with red-brown,

   dissolves in concentrated sulfuric acid with a blue-violet color. It dyes unstained cotton in red-brown shades, which can be fixed to washable chocolate brown by diazotizing the fiber and then developing it with betanaphtol.



  <I> Example: </I> The solution of the trisodium salt of 31.3 parts of 2'methyl-3'-amino-5'-sulfo-1- is added to the tetrazodiphenyl solution of 18.4 parts of benzidine at 0-5 ° C. flow in phenyl-5-pyrazolone-3-carboxylic acid. As soon as unchanged tetrazodiphenyl can no longer be detected, the solution of 24.5 parts of a-naphthylaminesulfonate sodium 1,6-Cleve is added. Further coupling occurs quickly with the formation of a thick, black deposit.

   The combination is over after a few hours. It is carefully neutralized by adding soda - and the dye is salted out from the red-brown solution that results.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Entwickler farbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes Benzidin in molekularem Ver hältnis mit 2'-Metbyl-3'-amino-5'-sulfo-l- phenyl-5-pyrazolon-3-karbonsäure zu einem Zwischenprodukt vereinigt und dasselbe mit a-Naphtylaminsulfosäure-1,6-Cleve weiterkup- pelt. Der neue Farbstoff bildet ein braun schwarzes Pulver, das sich in Wasser mit rotbrauner, in konzentrierter Schwefelsäure mit blauvioletter Farbe löst. Claim: Process for the preparation of a developer dye, characterized in that tetrazotized benzidine in a molecular ratio with 2'-methyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid to form an intermediate combined and the same with a-naphthylamine sulfonic acid-1,6-Cleve coupled. The new dye forms a brown-black powder that dissolves in water with a red-brown color, and in concentrated sulfuric acid with a blue-violet color. Er färbt unge- beizte Baumwolle in rotbraunen Tönen, welche sich durch Diazotieren auf der Faser und nachfolgende Entwicklung mit Betanaphtol zu waschechtem Schokoladebraun fixieren lassen. It dyes unstained cotton in red-brown shades, which can be fixed to washable chocolate brown by diazotizing the fiber and then developing it with betanaphtol.
CH121007D 1925-03-28 1925-11-02 Process for the preparation of a developer dye. CH121007A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE121007X 1925-03-28
CH119229T 1925-10-17

Publications (1)

Publication Number Publication Date
CH121007A true CH121007A (en) 1927-06-16

Family

ID=25709191

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121007D CH121007A (en) 1925-03-28 1925-11-02 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121007A (en)

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