Nova Chemicals (international) S.a.

Nova Chemicals Inc.

Nova Chemicals S.a.

Stephen Salomons

Niousha Kazemi

Fazle Sibtain

Kenneth Edward Taylor

Shivendra K Goyal

Monika Kleczek

Mehdi Keshtkar

XiaoChuan Wang

Bronwyn Gillon

Lawrence VanAsseldonk

Brian Molloy

Zengrong Zhang

Vinod Konaganti

Sepideh Kasiri

Qinyan Wang

Peter Zoricak

Hamidreza Khakdaman

Charles Carter

Christopher Dobbin

Stephen John Brown

Yves Lacombe

Christopher John Brooke Dobbin

Darryl Morrison

Isam Jaber

Soheil Sadeghi

Shivendra Goyal

Bronwyn Hilary Gillon

Shivendra Kumar Goyal

Eric Clavelle

Tieqi Li

Andrew Hawryluk

Maryam Fereydoon

Marion Walls

Lawrence Van Asseldonk

Kenneth Taylor

Stephen Brown

Christopher John Dobbin

Darryl J Morrison

A dual reactor solution polymerization process gives high density polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer. The polyethylene compositions can be used in the manufacture of injection molded closures or cast film having good barrier properties.

Polyethylene copolymer compositions and their barrier properties

This disclosure relates to an improved continuous solution polymerization process wherein production rate is increased. Process solvent, ethylene, optional comonomers, optional hydrogen and a bridged metallocene catalyst formulation are injected into a first reactor to form a first ethylene interpolymer. Optionally, process solvent, ethylene, optional comonomers, optional hydrogen and a bridged metallocene catalyst formulation are injected into a second reactor forming a second ethylene interpolymer. The first and second reactors may be configured in series or parallel modes of operation. Optionally, a third ethylene interpolymer is formed in a third reactor, wherein a homogeneous catalyst formulation or a heterogeneous catalyst formulation is employed. In solution, the first, optional second and optional third ethylene interpolymers are combined, the catalyst is deactivated, the solution is optionally passivated and following a phase separation process an ethylene interpolymer product is recovered.

Manufacturing ethylene interpolymer products at higher production rate

This disclosure relates to ethylene interpolymer compositions and films prepared therefrom. Specifically: ethylene interpolymer products having: a dimensionless Long Chain Branching Factor, LCBF, greater than or equal to 0.001; a residual catalytic metal of from &#x2265;0.03 to &#x2264;5 ppm of hafnium, and; a dimensionless unsaturation ratio, UR, of from &#x2265;&#x2212;0.40 to &#x2264;0.06, wherein UR is defined by the following relationship; UR=(SC&#x2212;T)/T, where SCis the amount of a side chain unsaturation per 100 carbons and Tis amount of a terminal unsaturation per 100 carbons, in said ethylene interpolymer product. The disclosed ethylene interpolymer products have a melt index from about 0.3 to about 500 dg/minute, a density from about 0.855 to about 0.975 g/cc, a polydispersity (M/M) from about 1.7 to about 25 and a Composition Distribution Breadth Index (CDBI) from about 1% to about 98%.

Ethylene interpolymer products and films

This disclosure relates to ethylene interpolymer compositions and films prepared therefrom. Specifically: ethylene interpolymer products having: a dimensionless nonlinear rheology network parameter, &#x394;, greater than or equal to 0.01, satisfying 0.01&#xd7;(Z&#x2212;50)&#x2264;&#x394;&#x2264;0.01&#xd7;(Z&#x2212;60)inequality wherein Z is a normalized molecular weight defined by where Mand Mare the weight average and entanglement molecular weights, and; a residual catalytic metal of from &#x2265;0.03 to &#x2264;5 ppm of hafnium. The disclosed ethylene interpolymer products have a melt index from about 0.3 to about 500 dg/minute, a density from about 0.855 to about 0.975 g/cc, a polydispersity, from about 1.7 to about 25 and a Composition Distribution Breadth Index (CDBI) from about 1% to about 98%.

Polyethylene copolymer compositions and articles with barrier properties

A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (&#x3b1;-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.

Means for increasing the molecular weight and decreasing the density of ethylene interpolymers employing homogeneous and heterogeneous catalyst formulations

Embodiments of the invention described herein relate to a polyethylene polymer composition suitable for use in the manufacture of packaging articles, flexible films and/or sheets. In one embodiment, the copolymer comprises a polyethylene resin with density 0.918 g/cmto about 0.935 g/cm, G' at G&#x2033;value, as determined from Dynamic Mechanical Analysis at 190&#xb0; C., of less than 40 Pa, M/Mof greater than 2, CDBIof greater than 60. Other embodiments relate to polymer compositions with defined molecular characteristics and formulations suitable for use in the manufacture of articles including films, sheets, bags and pouches with improved creep resistance and high toughness and a good balance of film stiffness and processability in monolayer and/or multi-layer film structures.

Ethylene copolymers produced with single site catalyst

A continuous solution polymerization process is disclosed wherein at least two homogeneous catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a second homogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to the third homogeneous catalyst formulation. A means for reducing the (&#x3b1;-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to the third homogeneous catalyst formulation.

Means for increasing the molecular weight and decreasing the density of ethylene interpolymers employing mixed homogeneous catalyst formulations

This disclosure relates to ethylene interpolymer compositions. Specifically, ethylene interpolymer products having: a Dilution Index (Y) greater than 0; total catalytic metal &#x2265;3.0 ppm; &#x2265;0.03 terminal vinyl unsaturations per 100 carbon atoms, and; optionally a Dimensionless Modulus (X) greater than 0. The disclosed ethylene interpolymer products have a melt index from about 0.3 to about 500 dg/minute, a density from about 0.869 to about 0.975 g/cm, a polydispersity (M/M) from about 2 to about 25 and a CDBIfrom about 20% to about 97%. Further, the ethylene interpolymer products are a blend of at least two ethylene interpolymers; where one ethylene interpolymer is produced with a single-site catalyst formulation and at least one ethylene interpolymer is produced with a heterogeneous catalyst formulation.

Dilution index

Disclosed are methods and conditions for manufacturing a polyethylene polymer or copolymer in a liquid/liquid biphasic non-adiabatic reaction, and the compositions and articles made therefrom.

Non adiabatic 2-phase (liquid-liquid) polymerization process

The various embodiments of the present invention relate to a polymerization reactor where the agitator mixing performance is optimized for use with a high activity catalyst and methods for developing the same.

Optimized agitator system for production of polyolefin

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Calgary, Canada

Stephen Salomons