http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-876972-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4a393844d957e3b97675ba1fc4892e96 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B29-0025 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B29-033 |
| filingDate | 1958-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1961-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-876972-A |
| titleOfInvention | Ortho-hydroxy-azo dyestuffs and process for their manufacture |
| abstract | 3-Hydroxynaphthalic acid amide and the N-31-methoxypropyl-, -n-butyl-, 21-hydroxyethyl- and-41-chlorophenyl derivatives thereof are prepared by condensing 3-hydroxynaphthalic acid anhydride with ammonia or the corresponding amine.ALSO:The invention comprises azo dyestuffs of formula:- <FORM:0876972/IV(c)/1> wherein R is a hydrogen atom or a substituted or unsubstituted alkyl group, a cycloalkyl group, or a substituted or unsubstituted aryl group and R1 is an aryl group which may be substituted. They are prepared by diazotizing an aromatic amine and coupling with a 3-hydroxynaphthalic acid imide or with 3-hydroxynaphthalic acid and in the latter case treating the azo compound so formed with ammonia or an amine. The dyes give a variety of shades such as red, orange and brown on cellulose derivatives, polyurethanes, polyacrylonitriles, polyvinyl chloride and polyesters. In Examples: (1) mono- and dis-azo dyes are obtained by diazotization and coupling using the following components: aniline, anilines substituted as follows:-2- or 3-mono- or 2 : 4-di-nitro-, 2- or 3-nitro-4-chloro- 2- or 4-chloro-, 2- or 3-methyl-, 2-bromo-, 2-hydroxy- 5-chloro-, 4-methoxy-, 2-carboxy-, 4-acetylamino-, 4-carboxylic acid amide, 2-chloro- 4-nitro-, 2-nitro- 4-methoxy-or -cyano-, 2-methoxy- 5-sulphodiethylamino- or -ethylsulphonyl- or phenylsulphonyl-, 2-trifluoromethyl- 4-chloro-, 3 : 5-bistrifluoromethyl-and 2 : 4-dimethyl-3-nitroanilines, 1-aminonaphthalene, 2-nitro-1-aminonaphthalene, 1-aminoanthraquinone, 4-aminodiphenyl or -diphenyl ether or -diphenylamine, 4-aminoazobenzene, 4-amino-2 : 5-dimethoxy-41-nitroazobenzene, and 4-amino-acetophenone or -benzophenone; 3-hydroxynaphthalic acid imide and the following N-derivatives thereof 31-hydroxy-or -methoxy- or -ethoxy-propyl, n- or iso-butyl, 21-hydroxy- or -methoxyethyl-, methyl, n-hexyl, cyclohexyl, phenyl and 41-chlorophenyl; (2) the monoazo dye 2-nitro-4-chloroaniline --> 3-hydroxynaphthalic acid is boiled with a mixture of 3-methoxypropylamine and water to give the imide derivative. |
| priorityDate | 1957-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 52.