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US 2023/0148294 A1Published application
Polymerization catalyst having a tetradentate ligand
AssigneeNOVA Chemicals (International) S.A.
InventorsXiaoliang GAO, Jia MO, Janelle SMILEY-WIENS
Life of this patent
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Abstract
A new olefin polymerization catalyst is ligated with a tetradentate ligand having a phenoxy/amino/ether/phenoxy (O/N/O/O) atom donor set. The new polymerization catalyst which is based on zirconium or hafnium produces an ethylene copolymer with high molecular weight and high comonomer incorporation levels.
Claims17
A polymerization process comprising polymerizing ethylene with one or more C3-12 alpha olefins in the presence of a polymerization catalyst system comprising:
- i) a catalyst composition having the formula:
- wherein M is Hf or Zr;
- R1 is a hydrogen, an optionally substituted hydrocarbyl group, or an optionally substituted heteroatom containing hydrocarbyl group;
- each R2 is independently an optionally substituted hydrocarbyl group, or an optionally substituted heteroatom containing hydrocarbyl group;
- each of A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11 and A12 is a hydrogen, a halide, an optionally substituted hydrocarbyl group, or an optionally substituted heteroatom containing hydrocarbyl group;
- L is an optionally substituted bivalent hydrocarbyl group, or an optionally substituted bivalent heteroatom containing hydrocarbyl group;
- optionally two or more adjacent A groups may be part of a ring structure;
- and each X is independently an activatable leaving group;
- and
- ii) a catalyst activator.
7 more elements
An olefin pre-polymerization catalyst having the formula:
- wherein M is Hf or Zr;
- R1 is a hydrogen, an optionally substituted hydrocarbyl group, or an optionally substituted heteroatom containing hydrocarbyl group;
- each R2 is independently an optionally substituted hydrocarbyl group, or an optionally substituted heteroatom containing hydrocarbyl group;
- each of A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11 and A12 is a hydrogen, a halide, an optionally substituted hydrocarbyl group, or an optionally substituted heteroatom containing hydrocarbyl group;
- L is an optionally substituted bivalent hydrocarbyl group, or an optionally substituted bivalent heteroatom containing hydrocarbyl group;
- optionally two or more adjacent A groups may be part of a ring structure;
- and each X is independently an activatable leaving group.
4 more elements
An olefin polymerization catalyst system comprising:
- i) a catalyst composition having the formula:
- wherein M is Hf or Zr;
- R1 is a hydrogen, an optionally substituted hydrocarbyl group, or an optionally substituted heteroatom containing hydrocarbyl group;
- each R2 is independently an optionally substituted hydrocarbyl group, or an optionally substituted heteroatom containing hydrocarbyl group;
- each of A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11 and A12 is a hydrogen, a halide, an optionally substituted hydrocarbyl group, or an optionally substituted heteroatom containing hydrocarbyl group;
- L is an optionally substituted bivalent hydrocarbyl group, or an optionally substituted bivalent heteroatom containing hydrocarbyl group;
- optionally two or more adjacent A groups may be part of a ring structure;
- and each X is independently an activatable leaving group;
- and
- ii) a catalyst activator.
7 more elements
Dependencies are inferred from the claim text.