CH121004A - Process for the preparation of a developer dye. - Google Patents
Process for the preparation of a developer dye.Info
- Publication number
- CH121004A CH121004A CH121004DA CH121004A CH 121004 A CH121004 A CH 121004A CH 121004D A CH121004D A CH 121004DA CH 121004 A CH121004 A CH 121004A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- dye
- acid
- pyrazolone
- red
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Entwieklerfarbstoifes. Es wurde gefunden, dass ein wertvoller Entwicklerfarbstoff erhalten wird, wenn man tetrazotiertes o-Tolidin, Orthokresotinsäure und 2'-Methyl-3'-amino-5'-sulfo-l-phenyl-3-methyl- 5-pyrazolon in molekularen Mengen aufein ander einwirken lässt, wobei man die Tetrazo- verbindung sowohl zuerst mit der Kresotin- säure, wie auch mit dem Pyrazolonderivat kuppeln kann.
Der neue Farbstoff bildet ein braunrotes Pulver, das sich in Wasser mit oranger, in konzentrierter Schwefelsäure mit rotvioletter Farbe löst. Er färbt ungebeizte Baumwolle in lebhaft orangen Tönen, welche durch Di- azotieren auf der Faser und nachfolgende Entwicklung mit Betanaphtol ohne wesent liche Nuancenänderung waschecht fixiert werden.
<I>Beispiel 1:</I> Die Tetrazoditolyllösung aus 21,2 Teilen o-Tolidin wird mit der sodaalkalischen Lösung von 16 Teilen Orthokresotinsäure zum Zwi schenprodukt vereinigt und dasselbe mit der schwachalkalisch reagierenden Lösung des Di- natriumsalzes von 28,3 Teilen 2'-Metbyl-3'- amino -5'- sulfo-l- p henyl- 3-methyl-5-pyrazolon weitergekuppelt. Die Kombination ist nach wenigen Stunden beendigt. Man wärmt als dann auf 70 C an und salzt den Farbstoff aus.
<I>Beispiel 2:</I> Zu der Terazoditolyllösung aus 21,2 Teilen o-Tolidin lässt man bei 0-511 C die Lösung des Dinatriumsalzes von 28,3 Teilen 2'-lyIethyl- 3'-amino-5'- sulfo-l-phenyl-3-methyl-5-pyrazo- lon zufliessen. Sobald unverändertes Tetrazo- ditolyl sich nicht mehr nachweisen lässt,
gibt man die Lösung von 16 Teilen Orthokresotin-- säure und 15 Teilen Natron 100 % zu und lässt bei gewöhlicher Temperatur weiterrühren. Nach wenigen Stunden ist die Reaktion be endigt. Man wärmt auf 70 C an, neutrali siert das überschüssige Natron mit Salzsäure. und salzt den Farbstoff aus.
Process for the preparation of a developing dye. It has been found that a valuable developer dye is obtained when tetrazotized o-tolidine, orthocresotinic acid and 2'-methyl-3'-amino-5'-sulfo-1-phenyl-3-methyl-5-pyrazolone are added in molecular amounts left to act, whereby the tetrazo compound can first be coupled with the cresotinic acid as well as with the pyrazolone derivative.
The new dye forms a brown-red powder that dissolves in water with an orange color, and in concentrated sulfuric acid with a red-violet color. It dyes unstained cotton in vivid orange tones, which are fixed by diazotization on the fiber and subsequent development with betanaphthol without any significant change in shade.
<I> Example 1: </I> The tetrazoditolyl solution of 21.2 parts of o-tolidine is combined with the soda-alkaline solution of 16 parts of orthocresotinic acid to form the intermediate product and the same with the slightly alkaline solution of the disodium salt of 28.3 parts 2 '-Metbyl-3'-amino -5'-sulfo-1-phenyl-3-methyl-5-pyrazolone coupled further. The combination ends after a few hours. Then it is warmed to 70 ° C. and the dye is salted out.
<I> Example 2: </I> The solution of the disodium salt of 28.3 parts of 2'-methyl-3'-amino-5'- is added to the terazoditolyl solution of 21.2 parts of o-tolidine at 0-511 ° C. sulfo-l-phenyl-3-methyl-5-pyrazolone flow in. As soon as unchanged tetrazoditolyl can no longer be detected,
the solution of 16 parts of orthocresotinic acid and 15 parts of 100% baking soda is added and stirring is continued at normal temperature. The reaction is over after a few hours. The mixture is warmed to 70 ° C. and the excess soda is neutralized with hydrochloric acid. and salt out the dye.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE121004X | 1925-03-28 | ||
CH119229T | 1925-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH121004A true CH121004A (en) | 1927-06-16 |
Family
ID=25709188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH121004D CH121004A (en) | 1925-03-28 | 1925-11-02 | Process for the preparation of a developer dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH121004A (en) |
-
1925
- 1925-11-02 CH CH121004D patent/CH121004A/en unknown
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