Olefin polymerization with pyridine moiety-containing singe-site catalysts
US6767975B1 · kind B1 · utility
37Cited by
3References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 14, 2003 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Jul 14, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/6592
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An olefin polymerization process is disclosed. The polymerization is performed in the presence of a clay, an activator, and a transition metal complex that has at least one pyridine moiety-containing ligand. The presence of clay increases the catalyst activity. The process is suitable for making ultra-high molecular weight polyethylenes (UHMWPE). The UHMWPE produced has increased bulk density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.