CH105398A - Process for the production of a new indigoid dye. - Google Patents
Process for the production of a new indigoid dye.Info
- Publication number
- CH105398A CH105398A CH105398DA CH105398A CH 105398 A CH105398 A CH 105398A CH 105398D A CH105398D A CH 105398DA CH 105398 A CH105398 A CH 105398A
- Authority
- CH
- Switzerland
- Prior art keywords
- production
- new
- indigoid dye
- dye
- new indigoid
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B7/00—Indigoid dyes
- C09B7/06—Indone-thionapthene indigos
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen indigoiden Farbstoffes. Es wurde gefunden, dass ein neuer, wert voller, indigoider Farbstoff entsteht, wenn man das 2,3-Naphththioindoxyl mit 5,7-Di- bromisatin kondensiert.
Der neue Farbstoff stellt ein rötliches Pulver dar, das sich in Schwefelsäure mit violetter Farbe löst. Er bildet eine goldgelbe Küpe und färbt Baumwolle in violetten Tönen von sehr guter Echtheit.
Beispiel: 200 Teile 2,3-Naphththioindoxyl und 305 Teile 5,7-Dibromisatin werden in 4000 Teilen Alkohol suspendiert und nach Beigabe von 5 Teilen konzentriertem Ammoniak zum Sieden erhitzt. Nach kurzem Köchen ist die Kondensation beendigt. Der in sehr guter Ausbeute abgeschiedene Farbstoff wird filtriert, gewaschen und getrocknet.
Process for the production of a new indigoid dye. It has been found that a new, valuable, indigoid dye is formed when the 2,3-naphththioindoxyl is condensed with 5,7-dibromisatin.
The new dye is a reddish powder that dissolves in sulfuric acid with a purple color. It forms a golden yellow vat and dyes cotton in violet tones with very good fastness.
Example: 200 parts of 2,3-naphthioindoxyl and 305 parts of 5,7-dibromoisatin are suspended in 4000 parts of alcohol and, after addition of 5 parts of concentrated ammonia, heated to the boil. After a short boil, the condensation is over. The dyestuff deposited in very good yield is filtered, washed and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH100705T | 1922-11-18 | ||
CH105398T | 1923-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH105398A true CH105398A (en) | 1924-06-16 |
Family
ID=25705835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH105398D CH105398A (en) | 1922-11-18 | 1923-03-29 | Process for the production of a new indigoid dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH105398A (en) |
-
1923
- 1923-03-29 CH CH105398D patent/CH105398A/en unknown
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