Phosphinimine amido-ether complexes
AssigneeNOVA Chemicals (International) S.A.
InventorsDarryl Morrison, P. Scott Chisholm, Cliff Baar, Graham Lee, Janelle Smiley-Wiens
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Abstract
Provided in this disclosure are organometallic complexes that contain i) a metal atom selected from Hf and Zr; 2) a phosphinimine ligand; 3) an amido-ether ligand and at least one other ancillary ligand. The use of such a complex, in combination with an activator, as an olefin polymerization catalyst is demonstrated. The catalysts are effective for the copolymerization of ethylene with an alpha olefin (such as 1-butene, 1-hexene, or 1-octene) and enable the production of high molecular weight copolymers (Mw greater than 25,000) with good comonomer incorporation at high productivity.
Claims5
A complex having the formula (PI)(AE)ML2, wherein:
- I) PI is a phosphinimine ligand defined by the formula:
- wherein each R1 is independently selected from a group consisting of a hydrogen atom;
- the C1-30 hydrocarbyl radical, which hydrocarbyl radical is unsubstituted or further substituted by a halogen atom;
- a C1-10 alkoxy radical;
- a C6-10 aryl or aryloxy radical;
- an amido radical;
- a silyl radical;
- and a germanyl radical;
- II) AE is an amido-ether ligand defined by the formula:
- wherein:
- Q is a bridging group between oxygen, O, and nitrogen, N2, and contains one or more atoms selected from the group consisting of Group 13 to 16 elements;
- R2 is a group containing 1 to 50 atoms selected from the group consisting of hydrogen and Group 13 to 17 elements;
- R3 is a group containing 1 to 50 atoms selected from the group consisting of hydrogen and Group 13 to 17 elements;
- and
- wherein the R2 group optionally joins together with the bridging group Q;
- III) each L is an activatable ligand;
- and
- IV) M is a metal selected from the group consisting of Zr and Hf, and wherein N1, N2 and optionally O are bonded to M.
Dependencies are inferred from the claim text.