Predicate |
Object |
assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c1957b74f08d22d5d3fe5b6b6d19b60f |
classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2420-05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-943 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-65925 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-6592 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-65912 |
classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-003 |
classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-642 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F210-16 |
filingDate |
2001-10-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_146c53bf8dcf32e9e854572582019851 |
publicationDate |
2002-05-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber |
WO-0242314-A1 |
titleOfInvention |
Catalysts for olefin polymerization |
abstract |
A method for making single-site catalysts useful for olefin polymerization is disclosed. A nitrogen-functional heterocycle is first deprotonated with an alkyllithium compound, followed by reaction of this anionic ligand precursor with about 0.5 equivalents of a Group 4 transition metal tetrahalide in a hydrocarbon solvent at a temperature greater than about 10°C to give an organometallic complex-containing mixture. When combined with exceptionally low levels of an activator (e.g., methyl alumoxane), the mixture actively polymerizes olefins to give polymers with a favorable balance of physical properties, including low density and narrow molecular weight distribution. |
priorityDate |
2000-11-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
type |
http://data.epo.org/linked-data/def/patent/Publication |