Nova Chemicals (international) S.a.

Nova Chemicals S.a.

Cliff Baar

Peter Phung Minh Hoang

Victoria Ker

Patrick Lam

Charles Ashton Garret Carter

Yan Jiang

Benjamin Milton Shaw

Peter Zoricak

P Scott Chisholm

XiaoChuan Wang

Darryl Morrison

Eric Vignola

Janelle Smiley-Wiens

Ian Gibbons

Paul Mesquita

Amin Mirzadeh

Graham Lee

Xiaoliang Gao

Dusan Jeremic

Ian Douglas McKay

Lee Douglas Henderson

Alexei Kazakov

Gail Baxter

Martina Elissa Djatmiko

Rajesh Dahyabhai Patel

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.

Phosphinimine amido-ether complexes

The present disclosure describes bottle closure assemblies which are made at least in part with a polyethylene composition having good processability, good organoleptic properties and good dimensional stability. The bottle closure assembly includes a cap portion, an elongated tether portion, and a retaining means portion. The retaining means portions engages a bottle neck or an upper portion of a bottle. The elongated tether portion connects at least one point on the cap portion to at least one point on the retaining means portion so as to prevent loss of the cap portion from a bottle.

Bottle closure assembly including a polyethylene composition

The present disclosure describes bottle closure assemblies which are made at least in part with a polyethylene composition having good flow properties and good resistance to environmentally induced stress cracking. The bottle closure assembly includes a cap portion, an elongated tether portion, and a retaining means portion. The retaining means portions engages a bottle neck or an upper portion of a bottle. The elongated tether portion connects at least one point on the cap portion to at least one point on the retaining means portion so as to prevent loss of the cap portion from a bottle.

Olefin polymerization is carried out with a supported phosphinimine catalyst which has been treated with a long chain substituted amine compound.

Modified phosphinimine catalysts for olefin polymerization

A highly active, supported phosphinimine catalyst is fed to a gas phase reactor as a slurry in a liquid hydrocarbon. Feeding the catalyst to a gas phase reactor in a viscous liquid hydrocarbon modifies catalyst initiation kinetics.

Feeding highly active phosphinimine catalysts to a gas phase reactor

Polyethylene films having a good balance of optical and mechanical properties are disclosed. The films are derived from ethylene copolymer compositions made with a suitably substituted phosphinimine catalyst. The ethylene copolymers have very narrow molecular weight distributions and broadened comonomer distributions.

Polyethylene film

A method for altering the polymer architecture of ethylene copolymers made with a supported phosphinimine polymerization catalyst. The method involves changing the amount of a catalyst modifier added to a reactor separately from or together with a supported phosphinimine polymerization catalyst.

Methods for controlling ethylene copolymer properties

Fouling in a dispersed phase reactor in the presence of a phosphinimine catalyst and MAO may be reduced by reducing the loading of the phosphinimine catalyst to provide from 0.02 to 0.031 mmol of transition M per g of catalyst while still maintaining a productivity of not less than 2500 g of polymer/gram of catalyst. The catalyst may optionally be used in the presence of an antistatic agent.

Reduced reactor fouling

A blend of polymers comprising from 5 to 95 weight % of a polymer having a high molecular weight made using a single site type catalyst and from 95 to 5 weight % of a polymer having a lower molecular weight made using a catalyst containing a phenoxide, preferably a salicylaldimine ligand, has an excellent toughness and would be suitable for use in applications such as polyolefin pipes.

Polymer blends

Properties of a polymer produced in gas phase or slurry phase using a dual catalyst such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, (co)monomer pressure, hydrogen partial pressure and the presence of non-polymerizable hydrocarbon. This provides an easy method to control the bimodality of a polymer as well as comonomer incorporation.

Adjusting polymer characteristics through process control

Properties of a polymer produced using a dual catalyst on the same support, such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, monomer pressure, hydrogen partial pressure and the presence of non-polymerizable hydrocarbon. This provides an easy method to control the bimodality of a polymer as well as comonomer incorporation.

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Calgary, Canada

Cliff Baar