CH238692A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH238692A CH238692A CH238692DA CH238692A CH 238692 A CH238692 A CH 238692A CH 238692D A CH238692D A CH 238692DA CH 238692 A CH238692 A CH 238692A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- preparation
- tone
- dye
- amino
- 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
- C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
- C09B33/02—Disazo dyes
- C09B33/08—Disazo dyes in which the coupling component is a hydroxy-amino compound
- C09B33/10—Disazo dyes in which the coupling component is a hydroxy-amino compound in which the coupling component is an amino naphthol
-
- 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
- C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
- C09B35/50—Tetrazo dyes
- C09B35/60—Tetrazo dyes of the type
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines Azofarbstofes. Gegenstand dieses Patentes ist ein Ver fahren zur Herstellung eines Azofarbstoffes, welches darin besteht, dass man 2 Mol der Diazoverbindung der 1-Amino-2-oxybenzol- 3-carbonsäure mit 1 Mol 2-Acetoacetylamino- 5-oxynaphtalin-7-sulfonsäure kuppelt.
Beispiel: 20,8 Gewichtsteile des Chlorhydrates der 1-Amino-2-oxybenzol-3-carbonsäure (91%ig) werden diazotiert; die Diazoverbindung wird in Gegenwart eines Überschusses vonNatrium- carbonat mit einer wässerigen Lösung aus 19 Gewichtsteilen des Natriumsalzes von 2-Aceto- acetyl -,amino - 5 - oxynaphtalin.- 7- sulfonsäure vereinigt.
Nach Beendigung der Kupplung wird der Farbstoff ausgesalzen und abgesaugt.
Der Disazofarbstoff von der Formel:
EMI0001.0027
eignet sich unter anderem zum Färben von Mischfasern aus Wolle und Zellwolle. Durch Nachbehandlung der Färbungen mit einer Mischung von Chromacetat und Kupfersulfat erhält man Ton-in-Ton-gleiche, gedeckte Bordotöne. Die Echtheiten, insbesondere die Lichtechtheit, sind sehr gut.
Process for the preparation of an azo dye. The subject of this patent is a process for the preparation of an azo dye, which consists in coupling 2 moles of the diazo compound of 1-amino-2-oxybenzene-3-carboxylic acid with 1 mole of 2-acetoacetylamino-5-oxynaphthalene-7-sulfonic acid.
Example: 20.8 parts by weight of the hydrochloride of 1-amino-2-oxybenzene-3-carboxylic acid (91%) are diazotized; the diazo compound is combined in the presence of an excess of sodium carbonate with an aqueous solution of 19 parts by weight of the sodium salt of 2-acetoacetyl-, amino-5-oxynaphthalene-7-sulfonic acid.
After the coupling has ended, the dye is salted out and filtered off with suction.
The disazo dye of the formula:
EMI0001.0027
is suitable, among other things, for dyeing mixed fibers made of wool and rayon. Post-treatment of the dyeings with a mixture of chromium acetate and copper sulfate gives tone-on-tone, muted Bordo tones. The fastness properties, in particular the light fastness, are very good.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE238692X | 1943-04-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH238692A true CH238692A (en) | 1945-08-15 |
Family
ID=5903628
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH296245D CH296245A (en) | 1943-04-17 | 1944-03-21 | Process for the preparation of an azo dye. |
CH296246D CH296246A (en) | 1943-04-17 | 1944-03-21 | Process for the preparation of an azo dye. |
CH296247D CH296247A (en) | 1943-04-17 | 1944-03-21 | Process for the preparation of an azo dye. |
CH238692D CH238692A (en) | 1943-04-17 | 1944-03-21 | Process for the preparation of an azo dye. |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH296245D CH296245A (en) | 1943-04-17 | 1944-03-21 | Process for the preparation of an azo dye. |
CH296246D CH296246A (en) | 1943-04-17 | 1944-03-21 | Process for the preparation of an azo dye. |
CH296247D CH296247A (en) | 1943-04-17 | 1944-03-21 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (4) | CH296245A (en) |
-
1944
- 1944-03-21 CH CH296245D patent/CH296245A/en unknown
- 1944-03-21 CH CH296246D patent/CH296246A/en unknown
- 1944-03-21 CH CH296247D patent/CH296247A/en unknown
- 1944-03-21 CH CH238692D patent/CH238692A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CH296245A (en) | 1954-01-31 |
CH296247A (en) | 1954-01-31 |
CH296246A (en) | 1954-01-31 |
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