CH120996A - Process for the preparation of a developer dye. - Google Patents
Process for the preparation of a developer dye.Info
- Publication number
- CH120996A CH120996A CH120996DA CH120996A CH 120996 A CH120996 A CH 120996A CH 120996D A CH120996D A CH 120996DA CH 120996 A CH120996 A CH 120996A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- preparation
- tetrazodiphenyl
- red
- orange
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Entivieklerfarlostoffes. Es wurde gefunden, dass ein wertvoller Entwicklerfarbstoff erhalten wird, wenn man Di-p-tetrazodiphenyl, Orthokresotinsäure und 2'-Methyl-3'-amino-5'-sulfo-l-phenyl-5-pyrazo- lon-3-karbonsäure in molekularen Mengen aufeinander einwirken lässt, wobei man die Tetrazoverbindung sowohl zuerst mit der Kresotinsäure, wie auch mit dem Pyrazolon- derivat kuppeln kann.
Der neue Farbstoff bildet ein ziegelrotes Pulver, das sich in Wasser mit oranger, in konzentrierter Schwefelsäure mit rotvioletter Farbe löst. Er färbt ungebeizte Baumwolle in lebhaft orangen Tönen,. welche durch Dia- zotieren auf der Faser und nachfolgende Entwicklung mit Betanaphtol ohne wesent liche Nuancenänderung waschecht fixiert werden.
Beispiel <I>1:</I> Die Tetrazodiphenyllösung aus 18,4 Tei len Benzidin wird mit der sodaalkalischen Lösung von 16 Teilen Orthokresotinsäure zum Zwischenprodukt vereinigt und dasselbe mit der schwach alkalisch reagierenden 2'-Methyl-3'-amino-5'-sulfo-l-pheriyl-5-pyrazo- lori-3-karbonsäure weitergekuppelt. Die Kom bination ist nach wenigen Stunden beendigt. Es wird alsdann auf<B>50"</B> C angewärmt und der in Lösung gegangene Farbstoff ausge- salzen.
<I>Beispiel 2:</I> Zu der Tetrazodiphenyllösung aus 18,4 Teilen Benzidin lässt man bei 0-5 C inner halb einer Viertelstunde unter gutem Rühren die neutrale Lösung des Trinatriumsalzes von 31,3 Teilen 2'-lyIethyl-3'-amino-5'-sulfo-l- phenyl-5-pyrazolon-3-karboneäure zufliessen.
Sobald uiiverändertesTetrazodiphenyl sich nicht mehr nachweisen lässt, gibt man die Lösung von 16 Teilen Orthokresotinsäure und 15 Teilen Xatron 1000/0 zu und lässt bei gewöhnlicher Temperatur weiterrühren. Nach wenigen Stunden ist die Reaktion beendigt. Man wärmt auf<B>50'</B> C an, neutralisiert das über schüssige Natron mit -Salzsäure und salzt den Farbstoff aus.
Process for the preparation of an Entivieklerfarlostoffes. It has been found that a valuable developer dye is obtained if di-p-tetrazodiphenyl, orthocresotinic acid and 2'-methyl-3'-amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid in Molecular amounts can act on each other, it being possible to couple the tetrazo compound first with the cresotinic acid as well as with the pyrazolone derivative.
The new dye forms a brick-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 diazoting on the fiber and subsequent development with betanaphtol without any significant change in shade.
Example <I> 1: </I> The tetrazodiphenyl solution of 18.4 parts of benzidine is combined with the soda-alkaline solution of 16 parts of orthocresotinic acid to form the intermediate and the same with the weakly alkaline 2'-methyl-3'-amino-5 ' -sulfo-1-pheriyl-5-pyrazolori-3-carboxylic acid coupled further. The combination is completed after a few hours. It is then warmed to <B> 50 "</B> C and the dye that has dissolved is salted out.
<I> Example 2: </I> The neutral solution of the trisodium salt of 31.3 parts of 2'-methyl-3 'is added to the tetrazodiphenyl solution of 18.4 parts of benzidine at 0-5 C within a quarter of an hour with thorough stirring. -amino-5'-sulfo-1-phenyl-5-pyrazolone-3-carbonic acid flow in.
As soon as the modified tetrazodiphenyl can no longer be detected, the solution of 16 parts of orthocresotinic acid and 15 parts of Xatron 1000/0 is added, and stirring is continued at normal temperature. The reaction is over after a few hours. Warm up to <B> 50 '</B> C, neutralize the excess baking soda with hydrochloric acid and salt out the dye.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE120996X | 1925-03-28 | ||
CH119229T | 1925-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH120996A true CH120996A (en) | 1927-06-16 |
Family
ID=25709180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH120996D CH120996A (en) | 1925-03-28 | 1925-10-17 | Process for the preparation of a developer dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH120996A (en) |
-
1925
- 1925-10-17 CH CH120996D patent/CH120996A/en unknown
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