Polymerization catalysts for production of polyethylene with high molecular weight
US12365750B2 · kind B2 · utility
0Cited by
6References
18Claims
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Key dates
| Filing date | Jul 30, 2020 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Aug 21, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The catalyst system includes a heterogeneous procatalyst, an electron donor, and a hydrogenation procatalyst. The heterogeneous procatalyst includes a titanium species, an aluminum species, and a magnesium chloride component. The hydrogenation procatalyst has the formula Cp2TiXnTiCp2 or Cp2TiXn. In formula Cp2TiXn, each Cp is a cyclopentadienyl substituted with at least one R1, wherein R1 is (C1-C10)alkyl; and each X is independently monoanionic or neutral, wherein each X is independently (C1-C40)hydrocarbon, (C1-C40)heterohydrocarbon, (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl, or a halogen atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.