Nova Chemicals (international) S.a.

Nova Chemicals Inc.

Bronwyn Gillon

Shivendra K Goyal

Stephen Salomons

Fazle Sibtain

Kenneth Edward Taylor

Niousha Kazemi

Monika Kleczek

Mehdi Keshtkar

Vinod Konaganti

Sepideh Kasiri

Christopher John Brooke Dobbin

Norman Aubee

Zengrong Zhang

Owen Lightbody

Soheil Sadeghi

Stephen John Brown

Patrick Lam

Christopher Dobbin

Maryam Fereydoon

Lison Mark

Thomas Green

Christian Carello

Jared Taylor

Kenneth Taylor

Shivendra Goyal

A Biaxially Oriented Polyethylene (BOPE) process uses a selected polyethylene having a medium density and a very broad molecular weight distribution. The use of this selected polyethylene facilitates stretching in the BOPE process in comparison to previously used polyethylene resins having a higher density and/or a narrower molecular weight distribution.

Biaxially oriented MDPE film

An ethylene copolymer comprising ethylene and at least one alpha olefin having from 4 to 8 carbon atoms has a density f from 0.940 to 0.960 g/cm, a molecular weight distribution, Mw/Mn of from 9 to 12, and a Z-average molecular weight, Mz of greater than 500,000. The ethylene copolymer is made in a multi-zone reactor system under solution phase polymerization conditions and is useful in the preparation of biaxially oriented polyethylene (BOPE) films.

Ethylene copolymer for biaxial orientation

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%.

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

Provided herein are VLDPE polymer compositions suitable for use in the manufacture of flexible films or sheets. In one embodiment, the copolymer comprises a polyethylene VLDPE resin with M/Mof greater than 2, CDBIof greater than 55 and a single melting peak in DSC measurement. The polymer compositions disclosed herein may be suitable for use in the manufacture of films with improved balance of film toughness, processability and sealability in monolayer and multi-layer film structures.

Very low density polyethylene produced with single site catalyst

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Calgary, Canada

Bronwyn Gillon