| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_34fbeb1e614ea098731393cc639cd372 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-65908
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-65912
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-943
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-61912
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-61908
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-61927 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F17-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F110-06 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-6192
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-6392
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-639
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-619 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-6592
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-642
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-602
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F110-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F17-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-76 |
| filingDate |
1990-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2001-04-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c4fd5be864d70e61bcd08271f22dab7e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d62b59aa7d3f21eb1efc73b7f1cfd16f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aa560bf1b0d3d662700d6fbecfc84621 |
| publicationDate |
2001-04-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0427696-B1 |
| titleOfInvention |
Process for producing syndiotactic polymers |
| abstract |
Syndiospecific catalysts and processes for the syndiotactic propagation of a polymer chain derived from an ethylenically unsaturated monomer which contains 3 or more carbon atoms or is a substituted vinyl compound. The catalysts comprise an unbalanced metallocene cation, characterized by a cationic metallocene ligand having sterically dissimilar ring structures joined to a positively charged coordinating transition metal atom, and a stable noncoordinating counter anion for the metallocene cation. One of said ring structures is a substituted or unsubstituted cyclopentadienyl ring and the other of the ring structures is a substituted cyclopentadienyl group which is sterically different from the first cyclopentadienyl group. A structural bridge between cyclopentadienyl groups imparts stereorigidity to the catalyst. The catalyst is contacted with a C3+ alpha olefin or other ethylenically unsaturated compound in a polymerization reaction zone and maintained in contact with the catalyst in the reaction zone under polymerizatio conditions to produce a syndiotactic polymer. |
| priorityDate |
1989-10-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |