CH230211A - Process for the preparation of a trisazo dye. - Google Patents
Process for the preparation of a trisazo dye.Info
- Publication number
- CH230211A CH230211A CH230211DA CH230211A CH 230211 A CH230211 A CH 230211A CH 230211D A CH230211D A CH 230211DA CH 230211 A CH230211 A CH 230211A
- Authority
- CH
- Switzerland
- Prior art keywords
- amino
- dye
- mol
- parts
- diazotized
- 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
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/16—Trisazo dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
- Paper (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 227352. Verfahren zur Herstellung eines Trisazofarbstoffes. Es wurde gefunden, da man einen neuen Az:ofarbstoff erhält, wenn man die Diazo- verbin:dung des Aminoazofarbstoffes, der selbst erhältl.ich ist durch Vereinigen in alka- li:
schem Medium, von 1 Mol Jiazotiertem 4 Amino - 2,5'- dnmethyl - 2''-methioxy-azobenzol mit 1 Mo1 2-Amino-8-oxynaphthalin-6-sulfon- säure mit 1 Mo:l 1-Amino-3-oxybenzol ver einigt.
Der neue Farbstoff stellt getrocknet ein ,dunkles bronzierendes Pulver dar, .das sieh in Wasser mit braunroter, in. konzentrierter Schwefelsäure mit blauer Farbe löst.
Der Fa.rbetoff färbt Baumwolle in violett schwarzen Tönen, die durch Entwickeln mit dazotiertem p-Nitranilin ein Schwarzbraun von :guter Waschechtheit und ausgezeichne ter neutraler und alkalischer Ätzbarkeit er geben.
<I>Beispiel:</I> 25,5 Teilte dies Mono:azofarbsto:ffe@s 4- Amino -2,5'-:dimethyl -2'-methoxy-azobenzo:
l werden mit 100 Teilen heissem Wasser und 30 Teilen konzentrierter Salzsäure zu einer Paste verrieben, mit 400 Teilen Eis und Wasser vermischt, so -dass die Temperatur 8 beiträgt.
Damm wird! eine Lösung von 7 Teilen Natriumnitrit innert einer Viertelstunde zu- ,gegeben. Die Temperatur beträgt 10-12 . Wenn. die Diazotierung beendet ist, wird von einem allfälligen uulöslichien Rückstand ab filtriert und,
die klare Diazolösung mit einer Lösung vereinigt, die in 300 Teilen Wasser 35 Teile Natriumearbonat und 2:3,9 Teile 2-Amino-8-:o:xynaphthalin-6-sulfonsäure ent hält. Wenn die Kupplung beendet ist, wird :der Dis:
azo)farbs@to@ff abfiltriert. Sein Natrium salz wird mit Wasser wieder gut verrührt, mit einer Lösung von 7 Teilen Natriumnitrit vermiseht und bei 10 30 Teile konzentrierter Salzsäure eingestürzt.. Nach 2 Stunden wird :
die fertige Diazoverbinidung mit einer Lö sung vereinigt, die in 100 Teilen Wasser 10,9 Teile 1-Amnno-3-oxybenzol und 30 Teile Na- triumcarbo:nat enthält. Nach zweistündigem Rühren wird auf 70 erwärmt und der Farb stoff :ohne weiteres abfiltriert.
<B> Additional patent </B> to main patent no. 227352. Process for the production of a trisazo dye. It has been found that a new azo dye is obtained if one uses the diazo compound of the amino azo dye, which is itself obtained by combining in alkali:
Shem medium, of 1 mol of jiazotized 4-amino-2,5'-dnmethyl-2 "-methioxy-azobenzene with 1 mol of 2-amino-8-oxynaphthalene-6-sulfonic acid with 1 mol: l 1-amino-3 -oxybenzene united.
The new dye, when dried, is a dark, bronzing powder, which dissolves in water with a brownish-red color and in concentrated sulfuric acid with a blue color.
The Fa.rbetoff dyes cotton in violet-black tones, which by developing with added p-nitroaniline give a black-brown of: good wash fastness and excellent neutral and alkaline etchability.
<I> Example: </I> 25,5 Shared this Mono: azo color: ffe @ s 4- Amino -2,5 '-: dimethyl -2'-methoxy-azobenzo:
l are triturated with 100 parts of hot water and 30 parts of concentrated hydrochloric acid to form a paste, mixed with 400 parts of ice and water, so that the temperature contributes 8.
Dam will! a solution of 7 parts of sodium nitrite within a quarter of an hour was added. The temperature is 10-12. If. the diazotization is complete, any uulöslichien residue is filtered off and,
the clear diazo solution combined with a solution containing 35 parts of sodium carbonate and 2: 3.9 parts of 2-amino-8-: o: xynaphthalene-6-sulfonic acid in 300 parts of water. When the coupling is finished: the dis:
azo) farbs @ to @ ff filtered off. Its sodium salt is stirred well with water again, mixed with a solution of 7 parts of sodium nitrite and collapsed with 10-30 parts of concentrated hydrochloric acid. After 2 hours:
the finished diazo compound is combined with a solution which contains 10.9 parts of 1-amnno-3-oxybenzene and 30 parts of sodium carbonate in 100 parts of water. After two hours of stirring, the mixture is warmed to 70 and the dye: readily filtered off.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH230211T | 1942-02-27 | ||
CH227352T | 1943-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH230211A true CH230211A (en) | 1943-12-15 |
Family
ID=25727089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH230211D CH230211A (en) | 1942-02-27 | 1942-02-27 | Process for the preparation of a trisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH230211A (en) |
-
1942
- 1942-02-27 CH CH230211D patent/CH230211A/en unknown
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