http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-715549-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6b6fc801b5bfe5304ffa40d938db6e09 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B29-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B29-30 |
| filingDate | 1952-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1954-09-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-715549-A |
| titleOfInvention | Improvements relating to monoazo dyestuffs and their use |
| abstract | 2 - Amino - 21 : 4 - dichlorodiphenyl sulphide is made by condensing 2-chlorothiophenol with 2-nitro-1 : 4-dichlorobenzene in boiling alcohol and then reducing the nitro group by the B<\>aechamp method. 2 - Amino - 4 : 41 - dichlorodiphenyl sulphide is analogously prepared.ALSO:The invention comprises monoazo dyestuffs of the general formula: <FORM:0715549/IV(c)/1> (wherein R and R1 represent phenyl radicals which may contain other substituents usual in azo dyestuffs, except acid water-solubilizing groups, and R1 contains the azo group in the ortho-position to the sulphur atom), and the manufacture thereof by coupling in an acid medium a diazo compound of a monoamine R-S-R1-NH2 with 2-amino-8-naphthol-6-sulphonic acid. Particularly valuable dyestuffs are those containing a chlorine atom in R1 in para-position to the sulphur atom, and advantageously containing also one or more further substituents, such as chlorine, acylamino or carbocylic ester groups, in R, preferably in ortho- and/or para-position to the sulphur atom. The products give bluish-red dyeings on wool. Examples (1)-(5) describe the use as diazo components of 2-amino-4-chlorodiphenyl sulphide-21-carboxylic acid n-butyl ester, 2-amino-21-acetylamino-4 : 41-dichlorodiphenyl sulphide, 2-amino-4 : 41- and -21 : 4-dichlorodiphenyl sulphide, and 2-amino-4-chloro-41-methyldiphenyl sulphide. In examples (6), wool is dyed with the dyestuff from 2-amino - 21-acetylamino - 4 : 41 - dichlorodiphenyl sulphide from a bath containing acetic acid (or ammonium sulphate or acetate) and Glauber's salt. A table shows the properties of further dyestuffs using as diazo components 4 : 5-dichloro-41-methyl-, 4-methyl sulphone-41-chloro-4-methyl sulphone-41-methyl-, 4-chloro-41-methoxy-, 21-chloroacetylamino-4 : 41-dichloro- and, 2-propionyl- and -butyryl-amino-4 : 41-dichloro-2-aminodiphenyl sulphide, 2-amino-4-chlorodiphenyl sulphide -21-carboxylic acid methyl ester, 2-amino-4 : 41-dichlorodiphenyl sulphide-21-carboxylic acid n-butyl ester, 2-amino-4-chlorodiphenyl sulphide-41-dimethylsulphonamide, and 2-amino-4-chlorodiphenyl sulphide-41-sulphonic acid p-amylphenol and decyl esters. Specifications 260,058 and 299,501, [both in Class 2(iii)], are referred to. |
| priorityDate | 1951-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.