CH121011A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121011A
CH121011A CH121011DA CH121011A CH 121011 A CH121011 A CH 121011A CH 121011D A CH121011D A CH 121011DA CH 121011 A CH121011 A CH 121011A
Authority
CH
Switzerland
Prior art keywords
pyrazolone
phenyl
red
preparation
dye
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 CH121011A publication Critical patent/CH121011A/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     2'-lMethyl-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 gelbroter, in konzentrierter Schwefelsäure  mit blauroter Farbe löst.

   Er färbt ungeheizte  Baumwolle in scharlachroten Tönen, welche  durch     Diazotieren    auf der Faser und nach  folgende Entwicklung mit     Betanaphtol    ohne  wesentliche     Nuancenänder        ung        waschechtfixiert     werden.  



  <I>Beispiel:</I>  Zu der     Tetrazodiphenyllösung    aus 18,4 Tei  len     Benzidin    lässt man bei<B>0-50</B> C die  Lösung des     Trinatriumsalzes    von 31,3 Teilen       2'-lMethyl-3'-amino-5'-sulfo-l-phenyl-5-pyrazo-          lon-3-karbonsäure    zufliessen. Sobald unver  änderte     Tetrazoverbindung    nicht mehr nach  gewiesen 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 when tetrazotized benzidine is in a molecular ratio with 2'-1-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 yellow-red color, and in concentrated sulfuric acid with a blue-red color.

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



  <I> Example: </I> The solution of the trisodium salt of 31.3 parts of 2'-l-methyl-3'- is added to the tetrazodiphenyl solution of 18.4 parts of benzidine at <B> 0-50 </B> C Amino-5'-sulfo-1-phenyl-5-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 ends 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 Benzidin in molekularem Verhältnis mit 2'-1VIethyl - 3'- amino - 5'- sulfo- 1-phenyl-5-pyrazolon-3-karbonsäure zu einem Zwischenprodukt vereinigt und dasselbe in alkalischer Lösung mit 1-Phenyl-3-methyl- 5-pyrazolon weiterkuppelt. Der neue Farb stoff bildet ein rotbraunes Pulver, das sich in Wasser mit gelbroter, PATENT CLAIM: Process for the preparation of a developer dye, characterized in that tetrazotized benzidine in a molecular ratio with 2'-1VIethyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid to an intermediate product combined and the same in alkaline solution with 1-phenyl-3-methyl-5-pyrazolone coupled. The new dye forms a red-brown powder that turns into yellow-red, in konzentrierter Schwefelsäure mit blauroter Farbe löst. Er färbt ungeheizte Baumwolle in scharlachroten Tönen, welche durch Diazotieren auf der Faser und nachfolgende Entwicklung mit Betanaphtol ohne wesentliche Nuancenände- rung waschecht fixiert werden. dissolves in concentrated sulfuric acid with a blue-red color. It dyes unheated cotton in scarlet shades, which are fixed by diazotizing on the fiber and subsequent development with betanaphthol without any significant change in shade.
CH121011D 1925-03-28 1925-11-02 Process for the preparation of a developer dye. CH121011A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE121011X 1925-03-28
CH119229T 1925-10-17

Publications (1)

Publication Number Publication Date
CH121011A true CH121011A (en) 1927-06-16

Family

ID=25709195

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121011D CH121011A (en) 1925-03-28 1925-11-02 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121011A (en)

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