CH121013A - Process for the preparation of a developer dye. - Google Patents
Process for the preparation of a developer dye.Info
- Publication number
- CH121013A CH121013A CH121013DA CH121013A CH 121013 A CH121013 A CH 121013A CH 121013D A CH121013D A CH 121013DA CH 121013 A CH121013 A CH 121013A
- Authority
- CH
- Switzerland
- Prior art keywords
- phenyl
- preparation
- dye
- purple color
- pyrazolone
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Entwicklerfarbstoffes. Es wurde gefunden, dass ein wertvoller Entwicklerfarbstoff erhalten wird, wenn man tetrazotiertes Dianisidin in molekularem Ver hältnis mit 2'-Methyl-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 blauroter, in konzentrierter Schwefelsäure mit violetter Farbe löst.
Er färbt ungeheizte Baumwolle in bordeauxroten Tönen, welche durch Diazotieren auf der Faser und nachfol gende Entwicklung mit Betanaphtol ohne we sentliche Nuancenänderung waschecht fixiert werden.
Beispiel: Zu der Tetrazodianisyllösung aus 24,4 Tei len o-Dianisidin lässt man bei 0-50 C die Lösung des Trinatriumsalzes von 31,3 Teilen 2'-Methyl-3'-amino-5'-sulfo-l-phenyl-5-pyrazo- lon-3-karbonsäure zufliessen. Sobald unverän derte Tetrazoverbindung nicht mehr nachge wiesen 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 if tetrazotized dianisidine is in a molecular ratio with 2'-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 blue-red color, and in concentrated sulfuric acid with a purple color.
It dyes unheated cotton in burgundy shades, which are fixed by diazotization on the fiber and subsequent development with betanaphtol without significant changes in nuance.
Example: The solution of the trisodium salt of 31.3 parts of 2'-methyl-3'-amino-5'-sulfo-1-phenyl-5 is added to the tetrazodianisyl solution of 24.4 parts of o-dianisidine at 0-50 ° 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 alkaline sodium solution of 17.4 parts of 1-phenyl-3-methyl-5-pyrazolone are added.
The combination is over 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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE121013X | 1925-03-28 | ||
CH119229T | 1925-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH121013A true CH121013A (en) | 1927-06-16 |
Family
ID=25709197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH121013D CH121013A (en) | 1925-03-28 | 1925-11-02 | Process for the preparation of a developer dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH121013A (en) |
-
1925
- 1925-11-02 CH CH121013D patent/CH121013A/en unknown
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