CH188521A - Process for the preparation of a new monoazo dye. - Google Patents
Process for the preparation of a new monoazo dye.Info
- Publication number
- CH188521A CH188521A CH188521DA CH188521A CH 188521 A CH188521 A CH 188521A CH 188521D A CH188521D A CH 188521DA CH 188521 A CH188521 A CH 188521A
- Authority
- CH
- Switzerland
- Prior art keywords
- new
- pure
- dye
- preparation
- bluish
- 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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
- C09B29/28—Amino naphthols
- C09B29/30—Amino naphtholsulfonic acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 184014. Verfahren zur Darstellung eines neuen Monoazofarbstoffes. Es wurde gefunden, dass man einen neuen, wertvollen Monoazofarbstoff erhält, wenn man die Diazoverbindung von 4-Amino-6-chlor- resorcin-di-o-tolyläther von der Formel
EMI0001.0007
mit 8 - Benzoylamino - 1 -oxy-naphthalin-di- sulfonsäure-(3.6) kuppelt.
Der neue Farbstoff bildet ein bläulich rotes Pulver, welches in Wasser mit lebhaft blauchstichigroter, in konzentrierter Schwefel säure mit reinblauer Farbe löslich ist. Er färbt Wolle, Seide und Zelluloseesterlacke in sehr schönen, reinen, rotvioletten Tönen von sehr guter Lichtechtheit; die Textilfärbungen zei gen ausserdem noch eine gute Walkbeständig- keit und eine besonders gute Seewasserecht- heit. Der reine und blaustichige Farbton des neuen Farbstoffes ist in seiner Lebhaftigkeit in der Azoreihe unübertroffen.
Beispiel: 33,95 kg 4-Amino-6-chlor-resoroin-di-o- tolyläther, eine farblose, feste Substanz, wel che erhalten wird, indem man 2,4,5-Trichlor- nitrobenzol mit o-gresol in Gegenwart von Alkalihydroxyd bei Temperaturen von 130 bis 150 zur Umsetzung bringt, reduziert und im Vakuum destilliert (268-270 bei 15 mm) werden dianotiert.
Die Diazolösung lässt man unter gutem Rühren bei 0 in eine wässrige Lösung von 42,5 kg 8-Benzoylamino-l-oxy- naphthalin-disulfonsäure-(3. 6) und überschüs sigem Natriumacetat einlaufen. Durch all mähliche Zugabe von Sodalösung wird neu tralisiert. Nach beendeter Kupplung wird auf geheizt, ausgesalzen, filtriert und getrocknet.
Der erhaltene Farbstoff bildet ein bläulich rotes Pulver, das in Wasser mit lebhaft blau stichig roter, in konzentrierter Schwefelsäure mit reinblauer Farbe löslich ist. Fr färbt Wolle und Seide in klaren, rotvioletten Tönen von sehr guter Licht- und Walkechtheit und vorzüglicher Seewasserechtheit. Die Licht echtheit eines mit dem neuen Farbstoff ge färbten Zelluloseesterlackes ist hervorragend.
<B> Additional patent </B> to main patent No. 184014. Process for the preparation of a new monoazo dye. It has been found that a new, valuable monoazo dye is obtained if the diazo compound of 4-amino-6-chlororesorcinol-di-o-tolyl ether of the formula
EMI0001.0007
with 8 - benzoylamino - 1 -oxy-naphthalene-disulfonic acid- (3.6) couples.
The new dye forms a bluish red powder, which is soluble in water with a lively bluish-tinted red color and in concentrated sulfuric acid with a pure blue color. It dyes wool, silk and cellulose ester lacquers in very beautiful, pure, red-violet shades of very good lightfastness; The textile dyeings also show good flexing resistance and particularly good seawater fastness. The pure and bluish hue of the new dye is unsurpassed in its liveliness in the azo range.
Example: 33.95 kg of 4-amino-6-chloro-resoroin-di-o-tolyl ether, a colorless, solid substance which is obtained by reacting 2,4,5-trichloro-nitrobenzene with o-gresol in the presence of alkali hydroxide at temperatures of 130 to 150 to react, reduced and distilled in vacuo (268-270 at 15 mm) are dianotized.
The diazo solution is allowed to run into an aqueous solution of 42.5 kg of 8-benzoylamino-1-oxynaphthalene-disulfonic acid (3.6) and excess sodium acetate at 0, with thorough stirring. Gradual addition of soda solution will neutralize. After the coupling has ended, the mixture is heated, salted out, filtered and dried.
The dye obtained forms a bluish red powder, which is soluble in water with a vivid blue-tinged red, in concentrated sulfuric acid with a pure blue color. Fr dyes wool and silk in clear, red-violet tones with very good lightfastness and milled fastness and excellent seawater fastness. The light fastness of a cellulose ester varnish colored with the new dye is excellent.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH188521T | 1935-09-24 | ||
CH184014T | 1935-09-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH188521A true CH188521A (en) | 1936-12-31 |
Family
ID=25720964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH188521D CH188521A (en) | 1935-09-24 | 1935-09-24 | Process for the preparation of a new monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH188521A (en) |
-
1935
- 1935-09-24 CH CH188521D patent/CH188521A/en unknown
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