http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-490389-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B29-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B29-30 |
| filingDate | 1937-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1938-08-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-490389-A |
| titleOfInvention | The manufacture of azodyestuffs |
| abstract | Azo dyes are prepared by combining diazo-compounds containing a hydroxyl or carboxyl group in o-position to the diazo group with N-acyl derivatives of 1-amino-3 : 6- or -6 : 3-naphthol sulphonic acid; alternatively, the dyes formed by using 1 : 3 : 6 or 1 : 6 : 3 acids as coupling components, may be acylated. A mixture of the acylated isomers may be used. The dyes may be aftertreated with metallizing agents, e.g. chromium fluoride or formate in substance or on the fibre. In examples, the following dyes are specified, coupling always occurring in alkaline solution: 4,6-dinitro-2-aminophenol --> N-benzoyl-1 : 6 : 3-acid or N - acetyl - 1 : 3 : 6 - acid; 4 - chloro - 6 - nitro-2-aminophenol --> N-acetyl-, carbomethoxy-, carboethoxy-, benzoyl-, or methoxyacetyl-1 : 3 : 6-acid; 4 - chloro - 2 - aminophenol --> N-acetyl-1 : 3 : 6-acid; 4-chloro- or methyl-2-aminophenol-6-sulphonic acid --> N-benzoyl-1 : 3 : 6-acid; 2-aminobenzoic acid --> N-acetyl-1 : 6 : 3-acid or 2-aminobenzoic acid --> 1 : 6 : 3-acid and subsequently acetylated; 1-amino-2-hydroxy-6-nitronaphthalene-4-sulphonic acid --> N-acetyl-1 : 3 : 6 or -1 : 6 : 3-acids; 4-chloro-6-nitro-2-aminophenol or 5-nitro - 2 - aminophenol --> N-phenoxyacetyl-1 : 6 : 3-acid; 4-chloro-2-aminophenol-6-sulphonic acid --> mixture of N-acetyl-1 : 6 : 3 and 1 : 3 : 6-acids formed by acetylating the mixture of p isomeric aminonaphtholsulphonic acids obtained by subjecting 1-aminonaphthalene-3,6-disulphonic acid to an alkaline melt. A table is given showing the shades produced on wool, both before and after treatment with chromium salts, by various other combinations. Other diazo components specified therein are 5-nitro-2-aminobenzoic acid, 4-methyl-5- or 6-nitro-2-aminophenol, 4-nitro-6-methyl- or chloro-2-aminophenol, 2-aminophenol-4-sulphonic acid, 4-nitro-2-aminophenol-6-sulphonic acid, 4- or 6-chloro-2-aminophenol, 2-aminophenol-4-sulphonic acid diethylamide and 4-chloro-5-nitro-2-aminophenol and other coupling components are 1-(41-methylbenzenesulphamido)-3 : 6- and -6 : 3-naphthol sulphonic acids. Other acyl radicles specified are propionyl, butyryl, chloracetyl, ethylsulphonyl and toluenesulphonyl and aliphatic acyl radicles containing more than 4 carbon atoms. According to the Provisional Specification, the diazo components must contain in o-position to the diazo-group a group which can be converted into a metal complex group. An example of the dye, 4.6-dinitro-2-aminophenol --> N-acetyl-1.6.3-acid, is also given. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2447163-A |
| priorityDate | 1937-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.