GB790261A - New naphthalene-monoazo-naphthalene dyestuffs and their metal complexes - Google Patents
New naphthalene-monoazo-naphthalene dyestuffs and their metal complexesInfo
- Publication number
- GB790261A GB790261A GB2785655A GB2785655A GB790261A GB 790261 A GB790261 A GB 790261A GB 2785655 A GB2785655 A GB 2785655A GB 2785655 A GB2785655 A GB 2785655A GB 790261 A GB790261 A GB 790261A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dyestuffs
- complexes
- naphthalene
- sulphonamido
- naphthylamine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/14—Monoazo compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
5 -, 6 - and 7 - sulphonamidonaphthalene-2 - diazo - 1 - oxides may be made by oxidizing an alkaline solution of a diazotized corresponding sulphonamido-b -naphthylamine with a mild oxidizing agent such as an alkali metal ferricyanide or by diazotizing a corresponding sulphonamido - 1 - nitro - 2 - naphthylamine which is obtainable by nitrating the corresponding 2-acetamidonaphthalene and hydrolysing the product.ALSO:The invention comprises dyestuffs of formula: <FORM:0790261/IV (b)/1> where the sulphonamido group is in the 5, 6 or 7 position and R is H or Cl, and cobalt and chromium 1,2-complexes thereof. The metal-free dyestuffs are made by alkaline coupling a diazo-oxide of the naphthalene sulphonamide with 5 - chloro - or 5,8 - dichloro - 1 - naphthol and metallization is effected in conventional fashion, preferably by using 0.5-0.6 atomic proportions of metal per mol. proportion of dyestuff under mildly acid, neutral or mildly alkaline conditions in aqueous medium in the presence of an organic solvent. The alkali metal or ammonium salts of the complexes yield blue to violet dyeings on wool. Silk and fibres made from superpoly-amides and urethanes and synthetic and natural proteins may also be coloured. Examples are provided in which dyestuffs and their cobalt and chromium complexes are made from the above indicated components and the complexes are used for dyeing wool and nylon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2785655A GB790261A (en) | 1955-09-30 | 1955-09-30 | New naphthalene-monoazo-naphthalene dyestuffs and their metal complexes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2785655A GB790261A (en) | 1955-09-30 | 1955-09-30 | New naphthalene-monoazo-naphthalene dyestuffs and their metal complexes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB790261A true GB790261A (en) | 1958-02-05 |
Family
ID=10266434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2785655A Expired GB790261A (en) | 1955-09-30 | 1955-09-30 | New naphthalene-monoazo-naphthalene dyestuffs and their metal complexes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB790261A (en) |
-
1955
- 1955-09-30 GB GB2785655A patent/GB790261A/en not_active Expired
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