http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-692407-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/D06L4-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C11D1-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06L3-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11D1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06L4-60 |
| filingDate | 1949-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1953-06-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-692407-A |
| titleOfInvention | Process for the manufacture of new optical brightening agents, and new compounds produced |
| abstract | Flourescent stilbene derivatives of the general formula <FORM:0692407/IV (b)/1> wherein R is a low molecular unsubstituted alkyl group are prepared by reacting 4,41-diaminostilbene-2,21-disulphonic acid with an acylating derivative of m- or p-cresotic acid acetylated at the hydroxyl group, saponifying the acyloxy group and alkylating the hydroxyl group so formed. The reaction may be carried out in the presence of benzene, toluene, chlorobenzene or nitrobenzene using an aqueous solution of the alkali salts of 4,41-diaminostilbene-2,21-disulphonic acid, or in the presence of a water-miscible solvent such as acetone. Acid binding agents may be present. In examples: (1) an aqueous solution of 4,41-diaminostilbene-2,21-disulphonic acid, soda ash and sodium acetate is reacted with a benzene solution of 21-acetoxy-4-methyl-benzoyl chloride and the 4,41-di-(211-hydroxy-411-methylbenzoylamino) - stilbene - 2,21 - disulphonic acid alkylated with dimethyl sulphate; (2) the dimethyl sulphate of (1) is replaced by diethyl sulphate, and (3) 4,41-di-(211-hydroxy-511 - methyl - benzoylamino) - stilbene - 2,21-disulphonic acid is ethylated with diethyl sulphate. Specification 692,348 is referred to. The Provisional Specification also includes examples of the preparation of (4) 4,41-di-(211-isobutoxy - 411 - methyl - benzoylamino)-stilbene-2,21-disulphonic acid by the action of 2-isobutoxy-4-methyl-benzoyl chloride on 4,41-diaminostilbene - 2,21 - disulphonic acid; (5) 4,41 - di - (211 - ethoxy - 311 - methyl - benzoylamino)-stilbene-2,21-disulphonic acid by the action of diethyl sulphate on 4,41-di-(211-hydroxy - 311 - methyl - benzoylamino) - stilbene-2,21-disulphonic acid; and (6) 4,41-di-(211-(211 - ethoxy - 511 - methyl - benzoylamino stilbene-2,21-disulphonic acid by the action of diethyl sulphate on 4,41-di-(211-hydroxy-511-methyl - benzoylamino) - stilbene - 2,21 - disulphonic acid.ALSO:Textile materials are brightened by treating them with fluorescent stilbene derivatives of the general formula <FORM:0692407/IV (c)/1> wherein R is a low molecular unsubstituted alkyl group (see Group IV (b)). Compounds specified are 4,41-di-(211-methoxy-411-methylbenzoylamino) - stilbene - 2,21 - disulphonic acid, 4,41 - di - (211 - ethoxy - 411 - methyl - benzoylamino) - stilbene - 2,21 - disulphonic acid and 4,41 - di - (211 - ethoxy - 511 - methyl - benzoylamino) - stilbene - 2,21 - disulphonic acid. The Provisional Specification also includes examples of the washing of white textile goods with a composition containing curd soap, sodium carbonate and one of the first two stilbene derivatives specified above, and of the treatment of white cotton material with a composition containing the third stilbene derivative specified above and Glauber's salt. Specification 692,348 is referred to. |
| priorityDate | 1949-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.