http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2199703-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_60e21de07fa18fc54e2150daffc14654 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-51 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C65-24 |
| filingDate | 1991-09-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c81391150484836bc628ee9e1d717d74 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ba49c49eb7a60c7721626bb8946a7588 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_931352117afc355967cf5ebf35ec451a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9a9f191c845c06d82a46d7d8154b2489 |
| publicationDate | 1992-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2199703-A1 |
| titleOfInvention | Perfluorinated polymide, perfluorinated poly (amic acid), starting compounds therefor, and methods for preparing them |
| abstract | A perfluorinated polyimide comprising a repeating unit represented by general formula (1): (see fig. I) and a perfluorinated poly(amic acid) comprising a repeating unit represented by general formula (6): (see fig. II) wherein R1 is a tetravalent organic group; and R2 is a divalent organic group, provided that chemical bonds between carbon atoms and monovalent elements contained in R1 and R2 are exclusively carbon-to-fluorine bonds; methods for preparing them; and optical material including the perfluorinated polyimide. 1,4-Bis(3,4-dicarboxytrifluorophenoxy)-tetrafluorobenzene dianhydride, 1,4-difluoropyro-mellitic anhydride, 1,4-bis(3,4-dicarboxytrifluoro-phenoxy)tetrafluorobenzene, 1,4-difluoropyromellitic acid, and 1,4-bis(3,4-dicyanotrifluorophenoxy)tetra-fluorobenzene as well as methods preparing them. The perfluorinated polyimide has a thermal stability and has a low optical loss in an optical communication wavelength region (0.8 to 1.7 µm). |
| priorityDate | 1990-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.