CH121972A - Process for the preparation of a developer dye. - Google Patents
Process for the preparation of a developer dye.Info
- Publication number
- CH121972A CH121972A CH121972DA CH121972A CH 121972 A CH121972 A CH 121972A CH 121972D A CH121972D A CH 121972DA CH 121972 A CH121972 A CH 121972A
- Authority
- CH
- Switzerland
- Prior art keywords
- brown
- amino
- preparation
- dye
- developer
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Entwieklerfarbstoffes. Es wurde gefunden, dass ein wertvoller Entwicklerfarbstoff erhalten wird, wenn man tetrazotiertes Benzidin in molekularem Ver hältnis mit 3'-Amino-4'-inethyl-5'-sulfo-l-phe- riyl-5-pyrazolon-3-karbonsäure zu einem Zwi schenprodukt vereinigt und dasselbe in alka lischer Lösung mit 2-Amino-8-riaphtol-6-sulfo- säure weiterkuppelt.
Der neue Farbstoff bildet ein braun schwarzes Pulver, das sich in Wasser mit violettbrauner, in konzentrierter Schwefelsäure mit blauer Farbe löst. Er färbt ungebeizte Baumwolle in violettbraunen Tönen, welche sich durch Diazotieren auf der Faser und nachfolgende Entwicklung mit P-hlaphtol zu waschechtem Schokoladebraun fixieren lassen. Beispiel <I>.</I>
Zu der Tetrazolösung aus 18,4 Teilen Benzidin lässt man bei 0 -5 C die neutral gestellte Lösung des Trinatriumsalzes von 31,3 Teilen 3'-Amino-4'-methyl-5'-sulfo-l-phe- nyl-5-pyrazolon-3-karbonsäure zufliessen. So bald unveränderte Tetrazoverbindung nicht mehr nachweisbar ist, gibt man die Lösung von 20 Teilen kalzinierter Soda und hierauf die schwach phenolphtaleinalkalische Lösung 'von 23,9 Teilen 2-Amino-8-naphtol-6-sulfo- säure zu. Die Kombination ist nach wenigen Stunden beendigt.
Es wird aldann aufgekocht und der Farbstoff ausgesalzen.
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 3'-amino-4'-ynethyl-5'-sulfo-1-pheriyl-5-pyrazolone-3-carboxylic acid Intermediate product combined and the same coupled further in alkali solution with 2-amino-8-riaphthol-6-sulfonic acid.
The new dye forms a brown-black powder that dissolves in water with a purple-brown color, and in concentrated sulfuric acid with a blue color. It dyes unstained cotton in violet-brown tones, which can be fixed to washable chocolate brown by diazotizing the fiber and then developing it with P-hlaphtol. Example <I>. </I>
The neutral solution of the trisodium salt of 31.3 parts of 3'-amino-4'-methyl-5'-sulfo-1-phenyl-5- is added to the tetrazo solution of 18.4 parts of benzidine at 0-5 ° 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 phenolphthalein-alkaline solution of 23.9 parts of 2-amino-8-naphthol-6-sulfonic acid are added. The combination ends after a few hours.
It is then boiled and the dye is salted out.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH119229T | 1925-10-17 | ||
GB121972X | 1926-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH121972A true CH121972A (en) | 1927-08-01 |
Family
ID=25709203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH121972D CH121972A (en) | 1925-10-17 | 1926-05-25 | Process for the preparation of a developer dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH121972A (en) |
-
1926
- 1926-05-25 CH CH121972D patent/CH121972A/en unknown
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