| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a051efd9ef47ee950e7a594e64891a49 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-00 |
| classificationIPCInventive |
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/C08F4-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-00 |
| filingDate |
1980-04-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1981-09-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7bbced3d7065bb46c94b71ecc827f307 |
| publicationDate |
1981-09-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4287093-A |
| titleOfInvention |
Process for making alpha-olefin polymers or copolymers with high isotacticity index |
| abstract |
A process for making crystalline polymers or copolymers of alpha-olefins containing 3 to 8 carbon atoms, such as polypropylene, by polymerization with a catalyst consisting of a combination of titanium chloride and an organic aluminium compound, in the presence of a stereospecificity additive. This stereospecificity additive is a cyclic polyether of the crown ether type, which may contain sulphur atoms and/or nitro radicals; this additive may be used together with an activator. The process produces polymers or copolymers with a high isotacticity index, while keeping catalyst activity sufficiently high. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5747407-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5260378-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4384983-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4600377-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5062600-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6046281-A |
| priorityDate |
1978-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |