CH145154A - Process for the preparation of a yellow wool dye. - Google Patents
Process for the preparation of a yellow wool dye.Info
- Publication number
- CH145154A CH145154A CH145154DA CH145154A CH 145154 A CH145154 A CH 145154A CH 145154D A CH145154D A CH 145154DA CH 145154 A CH145154 A CH 145154A
- Authority
- CH
- Switzerland
- Prior art keywords
- yellow
- preparation
- dye
- wool dye
- wool
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines gelben Wollfarbstoffes. Es wurde gefunden, dass man zu gelben Wollfarbstoffen gelangt, die eine grosse Licht echtheit besitzen, wenn man Diazoverbindun- gen von Basen der allgemeinen Formel:
EMI0001.0005
worin die Arylkerne beliebig substituiert sein können, und R Wasserstoff oder Alkyl be deutet, mit solchen Arylpyrazolonen oder ihren Substitutionsprodukten vereinigt, die im Arylkern durch Halogen substituiert sind, und gegebenenfalls die so erhältlichen Farb stoffe sulfiert. Gegenstand dieses Patentes ist ein Ver fahren zur Darstellung eines gelben Woll farbstoffes, welches dadurch gekennzeichnet ist, dass man meta-Aminobenzolsulfosäure- phenylamid dianotiert und mit dem Natrium salz des 1-(2'-Chlor-5'-sulfophenyl)
-3-methyl- 5-pyrazolons in Gegenwart überschüssiger Soda kuppelt.
Beispiel: 24,5 Gewichtsteile meta-Aminobenzolsulfo- säure-phenylamid werden mit 48 Gewichts teilen Salzsäure 20 B6 und 6,9 Gewichts teilen Nitrit dianotiert und mit 31 ()'(ewichts- teilen des Natriumsalzes des 1-(2'-Chlor-5'- sulfophenyl)-3-methyl-5-pyrazolons in Gegen wart überschüssiger Soda gekuppelt. Es ent steht ein gelber Farbstoff, der mit Kochsalz abgeschieden wird und nach dem Trocknen ein gelbes, in Wasser leicht lösliches Pulver bildet.
Er färbt Wolle in grünstichig-gelben Tönen von sehr guter Lichtechtheit.
Process for the preparation of a yellow wool dye. It has been found that yellow wool dyes are obtained, which have a high lightfastness, if one uses diazo compounds of bases of the general formula:
EMI0001.0005
wherein the aryl nuclei can be substituted as desired, and R is hydrogen or alkyl be, combined with those arylpyrazolones or their substitution products which are substituted in the aryl nucleus by halogen, and optionally sulfated the dyes thus obtainable. The subject of this patent is a process for the preparation of a yellow wool dye, which is characterized in that meta-aminobenzenesulfonic acid phenylamide is dianotated and the sodium salt of 1- (2'-chloro-5'-sulfophenyl)
-3-methyl-5-pyrazolones in the presence of excess soda couples.
Example: 24.5 parts by weight of meta-aminobenzenesulfonic acid phenylamide are dianotized with 48 parts by weight of hydrochloric acid 20 B6 and 6.9 parts by weight of nitrite and mixed with 31 () '(parts by weight of the sodium salt of 1- (2'-chlorine) 5'-sulfophenyl) -3-methyl-5-pyrazolones are coupled in the presence of excess soda, resulting in a yellow dye which is deposited with common salt and, after drying, forms a yellow powder that is easily soluble in water.
It dyes wool in greenish-yellow shades of very good lightfastness.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE145154X | 1928-09-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH145154A true CH145154A (en) | 1931-02-15 |
Family
ID=5670614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH145154D CH145154A (en) | 1928-09-21 | 1929-09-19 | Process for the preparation of a yellow wool dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH145154A (en) |
-
1929
- 1929-09-19 CH CH145154D patent/CH145154A/en unknown
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