CH257286A - Process for the preparation of a new monoazo dye. - Google Patents
Process for the preparation of a new monoazo dye.Info
- Publication number
- CH257286A CH257286A CH257286DA CH257286A CH 257286 A CH257286 A CH 257286A CH 257286D A CH257286D A CH 257286DA CH 257286 A CH257286 A CH 257286A
- Authority
- CH
- Switzerland
- Prior art keywords
- sulfuric acid
- new
- monoazo dye
- preparation
- dye
- 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
- C09B62/00—Reactive dyes, i.e. dyes which form covalent bonds with the substrates or which polymerise with themselves
- C09B62/44—Reactive dyes, i.e. dyes which form covalent bonds with the substrates or which polymerise with themselves with the reactive group not directly attached to a heterocyclic ring
- C09B62/62—Reactive dyes, i.e. dyes which form covalent bonds with the substrates or which polymerise with themselves with the reactive group not directly attached to a heterocyclic ring the reactive group being an ethylenamino or N-acylated ethylenamino group or a —CO—NH—CH2—CH2—X group, wherein X is a halogen atom, a quaternary ammonium group or O-acyl and acyl is derived from an organic or inorganic acid, or a beta-substituted ethylamine group
- C09B62/66—Azo dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Confectionery (AREA)
Description
Verfahren zur Herstellung eines neuen Monoazofarbstoffes. Die vorliegende Erfindung bezieht sieh auf ein verfahren zur Herstellung eines u@a.ien Monoazofarbstoffes, welches dadurch gekennzeichnet isst, dass N-n-Hexyl-N-ss-oxy- ;
ithylaiiilin, dia.zotiertes 4-Nitro-2-cyana.nilin wid ein sulfatierendes Mittel zusammen der art umgesetzt werden, dass die Hydroxyl- #ruppe in die entsprechende Schwefelsäure estergruppe umgewandelt wird, und der Di- azorest in die 4-Stellung zumtertiären Stick- #stoffatoin eintritt.
Der neue Farbstoff ist ein dunkelgrünes Pulver, v-elches ;ich in Wasser unter Bil- ilung einer rötliclivioletten Lösung und in l;onzeiit.ricrter Schwefelsäure unter Bildung einer sehokoladebraunen Lösung löst..
Die Hydroxylgruppe kann vor oder nach der Kupplung der Dia.zokomponente mit der Kupplungskomponente in die entsprechende Sc@lü@-ej.'f_hii.ureestergruppe umgewandelt wer den.
Beispiel: 1F;.3 Teile 4-Nitro-2-cy ana.nilin werden im Verlauf von 1 bis ? Stunden einer Lösung von Nitrosylschwefelsäure, welche durch Ein tragen von 6,9 Teilen Natriumnitrit in 140 Teile konzentrierter Schwefelsäure erhalten wird, zugesetzt,
worauf dass Gemisch wäh rend weiteren 1 bis 2 Stunden gerührt wird. Die schwefelsaure Lösung wird hierauf in uiii gerührtes Gemisch von 400 Teilen Eis iiiid 100 Teilen Wasser eingetragen. Die fil- iriell(_ Diazolö:sung wird allmählich einer ge- kühlten und gerührten Lösung von 32,3 Tei len des in 400 Teilen Wasser gelösten Na triumsalzes des N-n-Hexyl-N-ss-oxyäthyl- anilin-schwefelsäureesters zugesetzt.
Das Kupplungsgemisch wird während einiger Stunden gerührt, worauf die gekühlte Sus pension allmählich mit 10n-wässriger Na triumhydroxydlösung versetzt wird, bis sie auf Lackmus gerade alkalisch reagiert. Nach kurzem Rühren wird der neue Farbstoff ab filtriert, mit wenig Wasser gewaschen und bei 30 bis 40 C getrocknet.
Der neue Farbstoff bildet ein dunkelgrü nes Pulver, welches sich in heissem Wasser unter Bildung einer rötlichvioletten Lösung und in konzentrierter Schwefelsäure unter Bildung einer schokoladebraunen Lösung löst. Er färbt Zelluloseacetat, Kunstseide und Polyamidfasern in violetten Schattierungen aus einem Glaubersalz oder Natriumehlorid enthaltenden, neutralen Färbebad. Die Fär bungen erweisen :sich gegenüber Nassbehand- lungen und Licht als sehr haltbar.
Process for the preparation of a new monoazo dye. The present invention relates to a process for producing a u@a.ien monoazo dye which is characterized in that N-n-hexyl-N-ss-oxy-;
ithylaiiilin, dia.zotierter 4-nitro-2-cyana.nilin, a sulfating agent is reacted together in such a way that the hydroxyl group is converted into the corresponding sulfuric acid ester group, and the diazo radical is converted into the 4-position towards the tertiary stick - #stoffatoin enters.
The new dye is a dark green powder, v-elches; I dissolve in water to form a reddish-violet solution, and in white sulfuric acid to form a chocolate-brown solution.
The hydroxyl group can be converted into the corresponding Sc @ lü @ -ej.'f_hii.ureestergruppe before or after the coupling of the dia.zo component with the coupling component.
Example: 1F; .3 parts of 4-nitro-2-cy ana.nilin are used in the course of 1 to? Hours of a solution of nitrosylsulfuric acid, which is obtained by introducing 6.9 parts of sodium nitrite in 140 parts of concentrated sulfuric acid, added,
whereupon the mixture is stirred for a further 1 to 2 hours. The sulfuric acid solution is then added to a stirred mixture of 400 parts of ice and 100 parts of water. The filial (_ diazo solution is gradually added to a cooled and stirred solution of 32.3 parts of the sodium salt of N-n-hexyl-N-3-oxyethyl aniline sulfuric acid ester dissolved in 400 parts of water.
The coupling mixture is stirred for a few hours, after which the cooled suspension is gradually mixed with 10N aqueous sodium hydroxide solution until it just reacts alkaline to litmus. After brief stirring, the new dye is filtered off, washed with a little water and dried at 30 to 40.degree.
The new dye forms a dark green powder which dissolves in hot water to form a reddish-violet solution and in concentrated sulfuric acid to form a chocolate-brown solution. It dyes cellulose acetate, rayon and polyamide fibers in violet shades from a neutral dyebath containing Glauber's salt or sodium chloride. The colors have proven to be very durable to wet treatments and light.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB257286X | 1945-06-29 | ||
| CH251392T | 1946-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH257286A true CH257286A (en) | 1948-09-30 |
Family
ID=25729538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH257286D CH257286A (en) | 1945-06-29 | 1946-06-27 | Process for the preparation of a new monoazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH257286A (en) |
-
1946
- 1946-06-27 CH CH257286D patent/CH257286A/en unknown
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