GB418455A - Improvements in or relating to the manufacture of azo dyestuffs - Google Patents
Improvements in or relating to the manufacture of azo dyestuffsInfo
- Publication number
- GB418455A GB418455A GB1207833A GB1207833A GB418455A GB 418455 A GB418455 A GB 418455A GB 1207833 A GB1207833 A GB 1207833A GB 1207833 A GB1207833 A GB 1207833A GB 418455 A GB418455 A GB 418455A
- Authority
- GB
- United Kingdom
- Prior art keywords
- toluidine
- mol
- acid
- mols
- condensed
- 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
- C09B43/136—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents
- C09B43/145—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents with polycarboxylic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
Polyazo dyes having the general formula <FORM:0418455/IV/1> in which R = an aromatic residue (the same or different) which may be substituted, e.g. by halogen, alkyl, alkoxy and sulpho groups, but contains no free hydroxy or amino groups and in which R1 and/or R4 may carry additional azo groups are made by condensing a terephthaloyl halide (1 mol.) with the corresponding amino polyazo compound (2 mols.) in presence of a suitable condensing agent. They dye cotton, wool, silk and regenerated cellulose in orange to brown shades fast to washing and light. In examples: (1) the dyestuff 2-naphthylamine-6 : 8-disulphonic acid --> o -methylaniline sulpho acid (hydrolyzed) --> m-toluidine (2 p mols.) is condensed with terephthaloyl chloride; (2) the dyestuff sulphanilic acid --> 1 : 6- or 1 : 7-Cleve's acid --> m-toluidine (2 mols.) is condensed as in (1); (3) the aminodisazo compound in (1) (1 mol.) and the aminodisazo compound in (2) (1 mol.) are condensed with terephthaloyl chloride (1 mol); the proportion of the aminodisazo dyes may be varied. The trisazo dye aminoazobenzene disulphonic acid --> m-toluidine --> m-toluidine is also specified as a starting material as well as chloro-terephthaloyl chloride. Specification 326,791, [Class 2 (iii)], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1207833A GB418455A (en) | 1933-04-25 | 1933-04-25 | Improvements in or relating to the manufacture of azo dyestuffs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1207833A GB418455A (en) | 1933-04-25 | 1933-04-25 | Improvements in or relating to the manufacture of azo dyestuffs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB418455A true GB418455A (en) | 1934-10-25 |
Family
ID=9998022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1207833A Expired GB418455A (en) | 1933-04-25 | 1933-04-25 | Improvements in or relating to the manufacture of azo dyestuffs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB418455A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2746954A (en) * | 1956-05-22 | Dis- and polyazo dyestuffs |
-
1933
- 1933-04-25 GB GB1207833A patent/GB418455A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2746954A (en) * | 1956-05-22 | Dis- and polyazo dyestuffs |
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