CH230208A - Process for the preparation of a trisazo dye. - Google Patents
Process for the preparation of a trisazo dye.Info
- Publication number
- CH230208A CH230208A CH230208DA CH230208A CH 230208 A CH230208 A CH 230208A CH 230208D A CH230208D A CH 230208DA CH 230208 A CH230208 A CH 230208A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- parts
- diazotized
- dlol
- dark
- 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)
Description
Zusatzpatent zum Hauptpatent Nr.227352. Es wurde :gefunden, dass man einen neuen Azofarbs toff erhält, wenn man die Diaza- verbindung des Aminoazofarbstoffee, der ,selbst erhältlich isst durch Vereinigen in, alka- li"c#chem Medium,
von 1 Mol diazofiertem 4- Amnoazobenzol mit 1 Mol 2-Amino@-8-agy- naphthaJiu-6-sulfonsäure mit 1 Mol 1,3-Di- ogybenz.ol! verein'.-t.
Der neue Farbstoff stellt getrocknet -ein dunkles bronzierendes Pulver dar, dass sich in Wasser mit dunkelroter, in konzentrierter Sahwefels,äure mit blauvioletter Farbe löst.
Der Farbstoff färbt Baumwolle in rotbraunen Tönen, die -durch Entwickeln mit diazotier- tem p-Nitranilin ein val'les Braun von guter Waschechtheit und ausgezeichneter neutraller und alkalischer Ätzbarkeit ergeben.
<I>Beispiel:</I> 19,7 Teile des Monoazofarbstoffes 4- o Aminaazobenzol 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 beträgt. Dann wird eine Lösung von 7 Teilen Natriumnitrit innert einer Viertel'stunde zugegeben. Die Tempera tur beträgt 10-12 .
Wenn die Diazotierung beendet ist, wird von einem allfälligen un löslichen Rückstand abfiltriert und die klare Diazodbsung mit einer Lösung vereinigt, die in 300 Teilen Wasser 35 Teile Natrium- carbonat und 23,9 Teile 2-Amino,-8-o@gynapli- thalin-6-sulfon@säure enthält.
Wenn die Kupp- lunig beendet ist, wird :der Disazofarbstoff abfiltriert. Stein Natriumsal@z wird mit Wasser wieder gut verrührt,
mit einer Lösung von 7 Teilen Natriumnitrit vermischt und bei 10 30 Teile konzentrierter Salzsäume eingestürzt. Nach etwa 2 Stunden wird,die fertige Diazo- verbindung mit einer Lösung vereinigt, die in 100 Teilen. Wasser 11,
0 Teile 1,3-Dioxy- benzol und 30 Teile Natriumcarbonat enthält. Nach zweistündigem Rühren wird auf 70\ erwärmt und oder Farbstoff ohne weiteres ab- filtriert.
Additional patent to main patent No. 227352. It has been found that a new azo dye is obtained if one eats the diaza compound of the amino azo dye, which is obtainable by combining in "alkali" c # chemical medium,
of 1 mole of diazofiated 4-amnoazobenzene with 1 mole of 2-amino @ -8-agynaphthaJiu-6-sulfonic acid with 1 mole of 1,3-diogybenzol! club '.- t.
The new dye is dried - a dark bronzing powder that dissolves in water with a dark red, in concentrated Sahwefels, acid with a blue-violet color.
The dyestuff dyes cotton in red-brown shades which, when developed with diazotized p-nitroaniline, give a full brown of good fastness to washing and excellent neutral and alkaline etchability.
<I> Example: </I> 19.7 parts of the monoazo dye 4- o aminaazobenzene 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 is 8. Then a solution of 7 parts of sodium nitrite is added within a quarter of an hour. The temperature is 10-12.
When the diazotization is complete, any insoluble residue is filtered off and the clear Diazodbsung combined with a solution containing 35 parts of sodium carbonate and 23.9 parts of 2-amino, -8-o @ gynaplethalin in 300 parts of water Contains -6-sulfonic acid.
When the coupling is over: The disazo dye is filtered off. Stone sodium salt is mixed well with water again,
mixed with a solution of 7 parts of sodium nitrite and collapsed at 10 30 parts of concentrated salt fringes. After about 2 hours, the finished diazo compound is combined with a solution that is in 100 parts. Water 11,
Contains 0 parts of 1,3-dioxybenzene and 30 parts of sodium carbonate. After stirring for two hours, the mixture is warmed to 70 ° and the dye or dye is filtered off without further ado.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH230208T | 1942-02-27 | ||
CH227352T | 1943-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH230208A true CH230208A (en) | 1943-12-15 |
Family
ID=25727086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH230208D CH230208A (en) | 1942-02-27 | 1942-02-27 | Process for the preparation of a trisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH230208A (en) |
-
1942
- 1942-02-27 CH CH230208D patent/CH230208A/en unknown
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