Nova Chemicals (international) S.a.

Nova Chemicals S.a.

Cheng Fan

Xiaoliang Gao

Charles Carter

Darryl Morrison

Frederick Chiu

Peter Zoricak

P Scott Chisholm

Janelle Smiley-Wiens

James T Goettel

Qinyan Wang

Daisy Cruz-milette

Brian Molloy

Chia Yun Chang

Alva Woo

James Goettel

Provided in this disclosure are zirconium and hafnium complexes that contain 1) a cyclopentadienyl ligand; 2) an adamantyl-phosphinimine ligand; and 3) at least one other 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).

Cyclopentadienyl/adamantyl phosphinimine zirconium and hafnium complexes

Provided in this disclosure are titanium complexes that contain 1) a cyclopentadienyl ligand; 2) an adamantyl-phosphinimine ligand; and 3) at least one activatable 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) at high productivity under solution polymerization conditions.

Cyclopentadienyl/adamantyl phosphinimine titanium complexes

The copolymerization of ethylene with an optional comonomer is conducted in the presence of a catalyst having a specific aryloxy ether ligand structure. The process enables very high conversions of ethylene to polyethylene at very short residence times when conducted under conditions of pressures of at least 10.3 MPa and high ethylene feed concentrations of from 70 to 150 grams per liter. Using these polymerization conditions, the level of unsaturation may be controlled by the polymerization temperature: for example, a level of 0.09 vinyl groups per 1000 carbon atoms was observed at a polymerization temperature of 160° C. and a level of 0.22 vinyls per 1000 carbon atoms was observed at 220° C.

Control of unsaturation in polymers produced in solution process

The copolymerization of ethylene with an optional comonomer is conducted in the presence of a catalyst having a specific aryloxy ether ligand structure. The process enables very high conversions of ethylene to polyethylene at very short residence times when conducted under conditions of pressures of at least 10.3 MPa and high ethylene feed concentrations of from 70 to 150 grams per liter.

High productivity polymerization with aryloxy ether ligand catalyst

Organometallic complexes are described which are useful as pre-polymerization catalysts which may form part of olefin polymerization catalyst systems. The catalyst systems find use in the polymerization of ethylene, optionally with one or more Calpha-olefin comonomers. The organometallic complexes are broadly represented by formula I: wherein L is a bridging group containing a contiguous chain of atoms connecting P with Cy, wherein the contiguous chain contains 2 or 3 atoms and wherein Cy is a cyclopentadienyl-type ligand. The olefin polymerization catalyst system is effective at polymerizing ethylene with alpha-olefins in a solution phase polymerization process at high temperatures and produces ethylene copolymers with high molecular weight and high degrees of alpha-olefin incorporation. Pre-metallation compounds, metallation processes and synthetic methods to make the organometallic complexes as well as polymerization processes are also described.

Organometallic complex, olefin polymerization catalyst system and polymerization process

A phosphinimide catalyst system comprises: i) a phosphinimide pre-polymerization catalyst having two phosphinimide ligands, at least one of which is substituted by a phosphinimide moiety; and ii) a catalyst activator. The catalyst system polymerizes ethylene with an alpha-olefin to give high molecular weight ethylene copolymer.

Bis-phosphinimide catalysts for olefin polymerization

A phosphinimide catalyst system comprises: i) a phosphinimide pre-polymerization catalyst having a cyclopentadienyl ligand and a phosphinimide ligand which is substituted with a guanidinate type group; and ii) a catalyst activator. The catalyst system polymerizes ethylene with an alpha-olefin to give high molecular weight ethylene copolymer.

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Calgary, Canada

Cheng Fan