CH148687A - Process for the preparation of a vat dye. - Google Patents
Process for the preparation of a vat dye.Info
- Publication number
- CH148687A CH148687A CH148687DA CH148687A CH 148687 A CH148687 A CH 148687A CH 148687D A CH148687D A CH 148687DA CH 148687 A CH148687 A CH 148687A
- Authority
- CH
- Switzerland
- Prior art keywords
- red
- preparation
- dye
- vat
- vat dye
- Prior art date
Links
Description
Verfahren zur Darstellung eines KÜpenfarbstoffes. Gegenstand dieses Patentes ist ein Ver fahren zur Darstellung eines Küpenfarb- stoffes, welches dadurch gekennzeichnet ist, dass man Naphtoylen-benzimidazol-peri-di- carbonsäureanhydrid mit 1. 2-Dimethyl-4. 5- diaminobenzol kondensiert. <I>Beispiel: .</I>
3,4 Gewichtsteile Naplitoylen-benzimid- azol-peri-dicarbonsäureanhydrid werden zu sammen mit 1,4 Gewichtsteilen 1.2-Di- methyl-4 . 5-diaminobenzol in etwa der zehn fachen Menge Eisessig zum gelinden Sieden erhitzt, bis die Abscheidung des Farbstoffes beendet ist. Durch Absaugen, Waschen mit Eisessig, Äthylalkohol und Wasser wird der Farbstoff isoliert. Er stellt ein braunrotes Pulver dar, das sich in konzentrierter Schwefelsäure mit roter Farbe löst.
Er färbt aus grüner, in dicker Schicht und in der Aufsicht rot erscheinender Hydrosulfitküpe Baumwolle in kupferroten Tönen von guten Echtheitseigenschaften an.
Process for the preparation of a vat dye. The subject of this patent is a process for the preparation of a vat dye, which is characterized in that naphthoylene-benzimidazole-peri-dicarboxylic acid anhydride with 1,2-dimethyl-4. 5-diaminobenzene condensed. <I> Example:. </I>
3.4 parts by weight of naplitoylen-benzimid-azole-peri-dicarboxylic acid anhydride are added together with 1.4 parts by weight of 1,2-dimethyl-4. Heat 5-diaminobenzene in about ten times the amount of glacial acetic acid to a gentle boil until the dye has finished separating. The dye is isolated by suction, washing with glacial acetic acid, ethyl alcohol and water. It is a brownish-red powder that dissolves in concentrated sulfuric acid with a red color.
It dyes cotton in copper-red tones with good fastness properties from green hydrosulfite vat, which appears red in a thick layer and when viewed from above.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE148687X | 1928-06-18 | ||
CH143998T | 1929-06-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH148687A true CH148687A (en) | 1931-07-31 |
Family
ID=25714396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH148687D CH148687A (en) | 1928-06-18 | 1929-06-05 | Process for the preparation of a vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH148687A (en) |
-
1929
- 1929-06-05 CH CH148687D patent/CH148687A/en unknown
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