CH121010A - Process for the preparation of a developer dye. - Google Patents
Process for the preparation of a developer dye.Info
- Publication number
- CH121010A CH121010A CH121010DA CH121010A CH 121010 A CH121010 A CH 121010A CH 121010D A CH121010D A CH 121010DA CH 121010 A CH121010 A CH 121010A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- brown
- developer
- pyrazolone
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Entwiehlerfarbstoffes. Es wurde gefunden, dass ein wertvoller Entwicklerfarbstoff erhalten wird, wenn man tetrazotiertes o-Tolidin in molekularem Ver hältnis mit 2'-Methyl-3'-amino-5'-sulfo-l-pbe- nyl-5-pyrazolon-3-karbonsäure zu einem Zwi schenprodukt vereinigt und dasselbe in alka lischer Lösung mit dem Monoazofarbstoff aus 1-Diazo-4-aminobenzol-3-sulfosäure und Meta- toluylendiamin weiterkuppelt. Der neue Farb
stoff bildet ein schwarzes Pulver, das sich in Wasser mit brauner, in konzentrierter Schwe felsäure mit violetter Farbe löst. Er färbt ungebeizte Baumwolle in rotbraunen Tönen, welche durch Diazotieren auf der Faser und nachfolgende Entwicklung mit Betanaphtoi ohne wesentliche Nuancenänderung waschecht fixiert werden.
<I>Beispiel</I> Zu der Tetrazoditolyllösung aus 21,2 Tei len o-Tolidin@ lässt man bei<B>0-5'</B> C die Lö sung des Trinatriumsalzes von 31,3 Teilen 2'-Methyl-3'-amino-5'-sulfo-l-phenyl-5-pyrazo- lon-3-karbonsäure zufliessen.
Sobald unverän dertes Tetrazoditolyl nicht mehr nachgewiesen werden kann, gibt man die Lösung von 20 Teilen kalzinierter Soda zu und hierauf die sodaalkalische Lösung des Monoazofarbstoffes, erhalten aus der Diazoverbindung von 18,8 Teilen Paraphenylendiaminsulfosäure und 12,3 Teilen Metatoluylendiamin. Das Zwischen produkt tritt rasch in Reaktion, welche unter Bildung einer tiefbraunen Lösung nach we nigen Stunden beendigt ist. Die überschüssige Soda wird alsdann mit Salzsäure neutralisiert und der Trisazofarbstoff ausgesalzen.
Process for the preparation of a desiccant dye. It has been found that a valuable developer dye is obtained if tetrazotized o-tolidine is used in a molecular ratio with 2'-methyl-3'-amino-5'-sulfo-1-pbenyl-5-pyrazolone-3-carboxylic acid combined to form an intermediate product and the same in alkaline solution with the monoazo dye from 1-diazo-4-aminobenzene-3-sulfonic acid and metatoluylenediamine coupled on. The new color
The substance forms a black powder that dissolves in water with a brown color, and in concentrated sulfuric acid with a purple color. It dyes unstained cotton in red-brown tones, which are fixed by diazotizing on the fiber and subsequent development with Betanaphtoi without any significant change in shade.
<I> Example </I> The solution of the trisodium salt of 31.3 parts of 2'-methyl is added to the tetrazoditolyl solution of 21.2 parts of o-tolidin @ at <B> 0-5 '</B> C. -3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid flow in.
As soon as unchanged tetrazoditolyl can no longer be detected, the solution of 20 parts of calcined soda is added and then the alkaline soda solution of the monoazo dye, obtained from the diazo compound of 18.8 parts of paraphenylenediaminesulfonic acid and 12.3 parts of metatolylenediamine. The intermediate product reacts quickly, which is completed after a few hours with the formation of a deep brown solution. The excess soda is then neutralized with hydrochloric acid and the trisazo dye is salted out.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE121010X | 1925-03-28 | ||
CH119229T | 1925-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH121010A true CH121010A (en) | 1927-06-16 |
Family
ID=25709194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH121010D CH121010A (en) | 1925-03-28 | 1925-11-02 | Process for the preparation of a developer dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH121010A (en) |
-
1925
- 1925-11-02 CH CH121010D patent/CH121010A/en unknown
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