Polyolefins prepared with binuclear metallocene catalysts
US11802170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2022 |
| Grant date | Oct 31, 2023 |
| Priority date | — |
| Expiry date | Apr 25, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst compound and process for olefin polymerization. The catalyst can be represented by Formula (I): wherein: M is a transition metal selected from group 3, 4, or 5 of the Periodic Table of Elements; L is a linking group selected from any one or more difunctional C1-C20 hydrocarbyl, aryl or substituted aryl groups; T is an optional bridging group; each X is a univalent anionic ligand, or two Xs are joined and bound to the metal atom to form a metallocycle ring, or two Xs are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand; R1 and R2 are each independently a hydrogen atom or substituted or unsubstituted C1 to C20 hydrocarbyl group; R3, R5, R6 and R7 are each independently a hydrogen atom or a substituted or unsubstituted C1 to C20 hydrocarbyl group, and, optionally, any two of R5, R6, and R7 can be joined to form a cyclic structure; R4 is a substituted or unsubstituted aryl group; and R8, R9, R10, and R11 are each independently a substituted or unsubstituted C1 to C6 hydrocarbyl group and, optionally, R9 and R10 are joined to form a cyclic structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.