CH121008A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121008A
CH121008A CH121008DA CH121008A CH 121008 A CH121008 A CH 121008A CH 121008D A CH121008D A CH 121008DA CH 121008 A CH121008 A CH 121008A
Authority
CH
Switzerland
Prior art keywords
brown
preparation
red
dye
color
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 CH121008A publication Critical patent/CH121008A/en

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Description

  

  Verfahren zur Darstellung eines     .Entwielzlerfarbstoffes.       Es wurde gefunden, dass ein wertvoller       Entwicklerfarbstoff    erhalten wird; wenn man       tetrazotiertes        o-Tolidin    in molekularem     Ver-          bältnis    mit     2'-Methyl-3'-amino-5'-sulfo-l-phe-          iryl-5-pyrazolon-3-kai-borisäure    zu einem Zwi  schenprodukt vereinigt und dasselbe mit       a-Naphtylaminsulfosäure-1,        6-Cleve    weiter  kuppelt. Der neue Farbstoff bildet ein  braunschwarzes Pulver, das sich in Wasser  mit rotbrauner, in konzentrierter Schwefelsäure  mit blauvioletter Farbe löst.

   Er färbt     urge-          beizte    Baumwolle in rotbraunen Tönen, welche  sich durch     Diazotieren    auf der Faser und  nachfolgende Entwicklung mit     Betanaphtol     zu waschechten Schokoladebraun fixieren  lassen.  



  <I>Beispiel:</I>  Zu der     Tetrazoditolyllösung    aus 21,2 Tei  len     o-Tolidin    lässt man bei<B>0-50</B> C die  Lösung des     Trinatriumsalzes    von<B><U>31.3</U></B> Teilen     2'-          Methyl-3'-        amino    - 5'-     sulfo-1-pheriyl-5-pyrazo-          lon-3-kai-botisäirre    zufliessen. Sobald unver  ändertes     Tetrazoditolyl    nicht mehr nachge  wiesen werden kann, gibt man die Lösung  von 24,5 Teilen     a=Naphtylaminsulfosaurem            Natroii-1,        6-Cleve    zu.

   Es tritt rasch Weiter  kupplung ein unter Bildung eines dicken  schwarzen Niederschlages. Nach einigen Stun  den ist die Kombination beendigt. Man neu  tralisiert sorgfältig durch Zugabe von Soda  und salzt aus der hierbei entstehenden rot  braunen     Löaung    den     Farbstoff    aus.



  Process for the preparation of a .Entwielzler dye. It has been found that a valuable developer dye is obtained; when tetrazotized o-tolidine is combined in a molecular ratio with 2'-methyl-3'-amino-5'-sulfo-1-pheiryl-5-pyrazolone-3-kai-boric acid to form an intermediate product and the same with α-Naphthylamine sulfonic acid-1,6-Cleve further couples. 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.

   It dyes originally stained cotton in red-brown tones, 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 <B> <U> 31.3 </ U is added to the tetrazoditolyl solution of 21.2 parts of o-tolidine at <B> 0-50 </B> C. > </B> Parts of 2'-methyl-3'-amino-5'-sulfo-1-pheriyl-5-pyrazolone-3-kai-botisäirre flow. As soon as unchanged tetrazoditolyl can no longer be detected, the solution of 24.5 parts of a = naphthylaminesulfosaurem Natroii-1, 6-Cleve is added.

   Further coupling occurs rapidly with the formation of a thick black precipitate. The combination is over after a few hours. You neutralize carefully by adding soda and salt out the dye from the resulting red-brown solution.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Entwick- lerfarbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes o -Tolidin in molekularem Verhältnis mit 2'-lbl_ethyl-3'-amiiio-5'-sulfo-l- phenyl-5-pyrazolon-3-karbonsäure zu einem Zwischenpunkt vereinigt und dasselbe mit a-Naphtylamirisulfosäui-e-1,6-Cleve weiter kuppelt. Der neue Farbstoff bildet einbraun- schwarzes Pulver, das sich in Wasser mit rot brauner, in konzentrierter Schwefelsäure mit blauvioletter Farbe löst. Claim: Process for the preparation of a developer dye, characterized in that tetrazotized o-tolidine is added in a molecular ratio with 2'-lbl_ethyl-3'-amiiio-5'-sulfo-l-phenyl-5-pyrazolone-3-carboxylic acid combined an intermediate point and the same with a-Naphtylamirisulfosäui-e-1,6-Cleve coupled further. 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 ungeheizte Baumwolle in rotbraunen Tönen, welche sich durch Diazotieren auf der Faser und nach folgende Entwicklung mit Betanaphtol zu waschechten Schokoladebraun fixieren lassen. It dyes unheated cotton in red-brown shades, which can be fixed to washable chocolate brown by diazotizing the fiber and then developing it with betanaphtol.
CH121008D 1925-03-28 1925-11-02 Process for the preparation of a developer dye. CH121008A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE121008X 1925-03-28
CH119229T 1925-10-17

Publications (1)

Publication Number Publication Date
CH121008A true CH121008A (en) 1927-06-16

Family

ID=25709192

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121008D CH121008A (en) 1925-03-28 1925-11-02 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121008A (en)

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