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US 2017/0320972 A1Published application
Catalysts
OwnerDermot O'HARE, Jean-Charles BUFFET +2inventors
InventorsDermot O'HARE, Jean-Charles BUFFET, Tossapol KHAMNAEN, Thomas ARNOLD
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Abstract
Novel catalytic compositions are disclosed comprising symmetrical metallocene catalytic compounds. Also disclosed are uses of such catalytic compositions in olefin polymerisation reactions, as well as processes for polymerising olefins. When compared with prior art compositions, the catalytic compositions of the invention are markedly more active in the polymerisation of olefins.
Claims21
A composition comprising a solid methyl aluminoxane support material and compound of the formula (I) shown below:
- wherein
- R1, R2, R3 and R4 are each independently (1-3C)alkyl;
- Q is absent, or is a bridging group comprising 1, 2 or 3 bridging carbon atoms, and is optionally substituted with one or more groups selected from the group consisting of hydroxyl, (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, (1-6C)alkoxy, Si[(1-4C)alkyl]3, aryl, and —C(O)NRxRy;
- X is selected from zirconium, titanium or hafnium;
- and
- each Y group is independently selected from the group consisting of halo, hydrogen, a phosphonate anion, a sulfonate anion, a borate anion, (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, (1-6C)alkoxy, aryl and aryloxy, wherein each of (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, (1-6C)alkoxy, aryl, and aryloxy is optionally substituted with one or more groups selected from the group consisting of (1-6C)alkyl, halo, nitro, amino, phenyl, (1-6C)alkoxy, Si[(1-4C)alkyl]3 and —C(O)NRxRy;
- wherein Rx and Ry are independently (1-4C)alkyl.
4 more elements
(canceled)
Dependencies are inferred from the claim text.