http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-485592-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_de121c4283bf623b8906f1d698aacd7f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B29-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B29-20 |
| filingDate | 1936-11-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1938-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-485592-A |
| titleOfInvention | Manufacture of azo-dyestuffs |
| abstract | Azo dyes insoluble in water are made in substance, on the fibre or on a substratum by coupling the diazo compound of an amine of the formula <FORM:0485592/IV/1> or a derivative thereof with an arylide of 2 : 3-oxynaphthoic acid. In examples, (1) cotton is grounded in a liquor containing 1-(21 : 31 - oxynaphthoylamino) - 2 : 4 - di-methoxy-5-chlorobenzene, alcohol, pyridine, caustic soda, formaldehyde and turkey red oil and developed with a solution made by diazotizing 4-methoxy-3-aminophenyl - 1 - trifluoromethylsulphone in presence of acetone and zinc chloride with subsequent addition of sodium acetate and salt (yellowish red), (2) diazotized 3-aminophenyl - 1 - trifluoromethylsulphone is coupled with 1-(21 : 31-oxynaphthoylamino) - 2 - methoxybenzene in substance or in presence of barytes or zinc white (orange-red lakes), (3) cotton is padded with the anilide, printed with a paste containing diazotized 4-methoxy-3-aminophenyl-1-trifluororomethylsulphone, acetic acid and starch tragacanth, dried and treated with a hot sodium carbonate solution (vivid red). A table of further combinations is given. Specifications 6379/12, [Class 2 (iii)], 17279/13, [Class 15 (ii)], and 361,097 are referred to. Aminophenyltrifluoromethyl sulphones of the above formula are made by reducing the corresponding nitro compounds described in Specification 479,774 or by reduction of the nitro compounds made by nitration of trifluoromethylphenylsulphones. The o- and p-amino derivatives may be made by nitrating trifluoromethylphenylsulphides (cf. Specification 479,774) oxidizing the nitrophenyltrifluorosulphoxides formed to the nitro sulphones and reducing. |
| priorityDate | 1936-11-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.