http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2104655-A1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G69-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-4676 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-0828 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-6884 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C317-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-688 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-46 |
| filingDate | 1971-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1972-08-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-2104655-A1 |
| titleOfInvention | 3,3'-disulpho-diphenyl sulphone 4,4'-dicarboxylic acid - dianhydride - useful as an intermediate for eg polyesters and polyami |
| abstract | Title dianhydride of formula (I) - is a crystalline, colourless, extremely thermostable cpd. which can be used as a chemical inter., partic. as a monomer in the prodn. of e.g., polyesters and polyamides with high thermal stability and good affinity for dyes. (I) is prepd. by dehydration of 3,31-disulpho-diphenyl sulphone 4,41-dicarboxylic acid (prepd. by condensing toluene with H2SO4, sulphonating the resulting 4,41-dimethyldiphenyl sulphone, and oxidising the resulting 4,41-dimethyl-3,3'-disulpho-diphenyl sulphone), e.g. by treating with a carbodiimide, acetyl chloride or acetic anhydride in the presence or absence of a solvent. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2949113-A1 |
| priorityDate | 1971-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.