Bis-phosphaguanidine and poly-phosphaguanidine ligands with group IV metal catalysts produced therefrom
US11028190B2 · kind B2 · utility
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Key dates
| Filing date | Sep 28, 2017 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Feb 14, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Embodiments are directed to bis- and poly-phosphaguanidine compounds, and the metal-ligand complexes formed therefrom, wherein the metal complexes can be used as procatalysts in polyolefin polymerization. Formulas (I) (II) and (III).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.