GB701709A - Process for the preparation of polyazo dyestuffs - Google Patents
Process for the preparation of polyazo dyestuffsInfo
- Publication number
- GB701709A GB701709A GB14763/51A GB1476351A GB701709A GB 701709 A GB701709 A GB 701709A GB 14763/51 A GB14763/51 A GB 14763/51A GB 1476351 A GB1476351 A GB 1476351A GB 701709 A GB701709 A GB 701709A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- toluidine
- naphthylamine
- disulphonic acid
- aminoazobenzene
- 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
- C09B43/00—Preparation of azo dyes from other azo compounds
- C09B43/12—Preparation of azo dyes from other azo compounds by acylation of amino groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
The invention comprises disazo and polyazo dyestuffs of the formula <FORM:0701709/IV(c)/1> where x and y are 0 or 1, A is hydrogen or methyl and R1, R2, R3 and R4 are benzene or naphthalene nuclei which contain at least four solubilizing groups and may be further substituted, e.g. with halogen, alkyl, alkoxy, acylamino or nitro groups, but do not contain a hydroxy and another metalizable group adjacent to the same azo group. These are made by acylating the appropriate aminoazo compounds with a dichloride or dibromide of an acid HOCO-CH=CA-COOH, preferably in an aqueous medium in the presence of an acid binding agent; such acids are fumaric, maleic, citraconic and mesaconic. The products dye cotton and regenerated cellulose dischargeable yellow or brown shades. In the examples the following dyestuffs are acylated with fumaric chloride: (1) 2-naphthylamine-4 : 8-disulphonic acid-->acetyl m-phenylene diamine; (2) 4-aminoazobenzene-3 : 4\sv-disulphonic acid-->m-toluidine; (3) 2-naphthylamine-6 : 8-disulphonic acid-->m-toluidine-->cresidine; (4) 4-aminoazobenzene-3 : 4\sv-disulphonic acid -->m-toluidine-->acetyl-m-phenylene diamine; (5) disazo dyestuff of (2) p-nitrobenzoylated and reduced; (6) sulphanilic acid-->1-naphthylamine-6-sulphonic acid-->m-toluidine. Other suitable components are mentioned. Specifications 418,295 and 643,046 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH701709X | 1950-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB701709A true GB701709A (en) | 1953-12-30 |
Family
ID=4530084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14763/51A Expired GB701709A (en) | 1950-06-23 | 1951-06-21 | Process for the preparation of polyazo dyestuffs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB701709A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4194883A (en) | 1974-12-20 | 1980-03-25 | Hoechst Aktiengesellschaft | Water-soluble disazo dyestuffs and process for coloring synthetic polyamide fibres with them |
-
1951
- 1951-06-21 GB GB14763/51A patent/GB701709A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4194883A (en) | 1974-12-20 | 1980-03-25 | Hoechst Aktiengesellschaft | Water-soluble disazo dyestuffs and process for coloring synthetic polyamide fibres with them |
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