Nova Chemicals (international) S.a.

Brian Molloy

XiaoChuan Wang

Peter Zoricak

Qinyan Wang

Lawrence VanAsseldonk

Fazle Sibtain

Norman Aubee

Kenneth Edward Taylor

Hamidreza Khakdaman

Stephen Salomons

Christopher Dobbin

Niousha Kazemi

Mehdi Keshtkar

Charles Carter

Monika Kleczek

Zengrong Zhang

Celine Bellehumeur

Yves Lacombe

Tieqi Li

Steven Clemens

Xiaoliang Gao

Stephen John Brown

P Scott Chisholm

Shivendra K Goyal

Eric Clavelle

Cheng Fan

Janelle Smiley-Wiens

Amin Mirzadeh

James T Goettel

Kenneth Taylor

Disclosed herein are polymerization processes where recycled polymeric material is fed to polymerization process to produce a blend of virgin polymer with recycled polymeric content.

Processes for producing polyethylene containing recycled polymeric material

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

High density polyethylene compositions having a high flow index and a bimodal composition provides an outstanding combination of processability, stiffness and ductility in rotomolded articles. The compositions have a low relative elasticity (G'/G″, measured at 0.05 rad/sec) of less than 0.03.

Rotomolding compositions with low relative elasticity

A polyethylene composition which when made into a film layer having a thickness of about 1 mil has a machine direction (MD) 1% secant modulus of ≥200 MPa and an oxygen transmission rate (OTR) of ≥600 cmper 100 inchper day and when made into a film layer having a thickness of about 2 mil has a seal initiation temperature (SIT) of ≤90° C. and an area of hot tack window (AHTW) of ≥160 Newtons·° C.

Polyethylene composition and film having high stiffness, outstanding sealability and high permeability

The copolymerization of ethylene with a cyclic mono olefin (such as norbornene) is conducted in the presence of a catalyst system comprising a bridged hafnocene catalyst and a three part activator. The catalyst system provides excellent activity at high polymerization temperatures. Copolymers produced according to this invention have unique microstructure (with methyl branching being observed) and unique rheology.

Ethylene-cyclic mono olefin copolymerizations

A polyethylene composition having a high flow index and a bimodal composition provides an outstanding combination of environmental stress crack resistance (ESCR) and ductility in rotomolded articles. The composition is easy to process/mold.

Enhanced ESCR and ductility bimodal rotomolding resin

A polyethylene composition including a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution M/Mof &#x3c;2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 50,000 to 200,000 and a molecular weight distribution M/Mof &#x3c;2.3, and a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 70,000 to 200,000 and a molecular weight distribution M/Mof &#x3c;2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene.

Polyethylene composition and film having outstanding properties

A thermoformable film comprises a polyethylene composition. The polyethylene composition comprises a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution M/Mof &#x3c;2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 15,000 to 100,000 and a molecular weight distribution M/Mof &#x3c;2.3, and a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution M/Mof &#x3e;2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition has a melt flow ratio (I/I) of &#x2264;50 and an area Dimensional Thermoformability Index (aDTI) at 105&#xb0; C. of less than 15.

Thermoformable film

A thermoformable film including a polyethylene composition. The polyethylene composition includes a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution M/Mof &#x3c;2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of less than 75,000 and a molecular weight distribution M/Mof &#x3c;2.3, a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of less than 75,000 and a molecular weight distribution M/Mof &#x3c;2.3, and a fourth polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 100,000 to 250,000 and a molecular weight distribution M/Mof &#x3e;2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition has a melt flow ratio (I/I) of &#x2264;55 and an area Dimensional Thermoformability Index (aDTI) at 105&#xb0; C. of less than 15.

A polyethylene composition includes a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution Mw/Mn of &#x3c;2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 15,000 to 100,000 and a molecular weight distribution Mw/Mn of &#x3c;2.3, and a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution Mw/Mn of &#x3e;2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition has a soluble fraction in a CEF analysis of at least 10 weight percent. Film made from the polyethylene composition may have a machine direction 1% secant modulus of &#x25a1;190 MPa (at a film thickness of about 1 mil), a seal initiation temperature (SIT) of &#x2264;100&#xb0; C. (at a film thickness of about 2 mil), an area of hot tack window (AHTW) of &#x2265;160 Newtons&#xb7;C&#xb0; (at a film thickness of about 2 mil) and an oxygen transmission rate (OTR) of &#x2265;650 cm3 per 100 inch2 per day (at a film thickness of about 1 mil).

Polyethylene composition and film having a good permeability, stiffness and sealability

A polyethylene composition comprises a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution M/Mof &#x3c;2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 50,000 to 200,000 and a molecular weight distribution M/Mof &#x3c;2.3, and a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 70,000 to 200,000 and a molecular weight distribution M/Mof &#x3c;2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition has a composition distribution breadth index, CDBIobtained from a crystallization elution fractionation (CEF) analysis of &#x3c;45 weight %. A film made from the polyethylene composition may have a machine direction 1% secant modulus of &#x2265;200 MPa (at a film thickness of about 1 mil), a seal initiation temperature (SIT) of &#x2264;85&#xb0; C. (at a film thickness of about 2 mil), an area of hot tack window (AHTW) of &#x2265;220 Newtons&#xb7;C&#xb0; (at a film thickness of about 2 mil), an oxygen transmission rate (OTR) of &#x2265;600 cmper 100 inchper day (at a film thickness of about 1 mil), a dart impact strength of &#x2265;400 g/mil, and a machine direction (MD) tear strength of &#x2265;400 g/mil.

A polyethylene composition includes a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution M/Mof &#x3c;2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 15,000 to 100,000, a molecular weight distribution M/Mof &#x3e;2.3, and a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution M/Mof &#x3e;2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition has a soluble fraction in a CEF analysis of at least 10 weight percent. Film made from the polyethylene composition may have a machine direction 1% secant modulus of 200 &#x2265;MPa (at a film thickness of about 1 mil), a seal initiation temperature (SIT) of &#x2264;90&#xb0; C. (at a film thickness of about 2 mil), an area of hot tack window (AHTW) of &#x2265;160 Newtons&#xb7;C&#xb0; (at a film thickness of about 2 mil) and an oxygen transmission rate (OTR) of &#x2265;600 cmper 100 inch per day (at a film thickness of about 1 mil).

A polyethylene composition including a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution M/Mof &#x3c;2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of less than 75,000 and a molecular weight distribution M/Mof &#x3c;2.3, and a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 100,000 to 300,000 and a molecular weight distribution M/Mof &#x3e;2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition has a soluble fraction in a CEF analysis of at least 15 weight percent. A film made from the polyethylene composition may have a machine direction 1% secant modulus of &#x2265;200 MPa (at a film thickness of about 1 mil) and an oxygen transmission rate (OTR) of &#x2265;700 cmper 100 inchper day (at a film thickness of about 1 mil). A film made from the polyethylene composition retains much of its dart impact performance on downgauging from a thickness of 1 mil to a thickness of 0.75 mil.

Polyethylene composition and film having retained dart impact

In some embodiments disclosed herein are polyethylene composition including a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution M/Mof &#x3c;2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of less than 75,000 and a molecular weight distribution M/Mof &#x3c;2.3, a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of less than 75,000 and a molecular weight distribution M/Mof &#x3c;2.3, and a fourth polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 100,000 to 250,000 and a molecular weight distribution M/Mof &#x3e;2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition may have a soluble fraction in a CEF analysis of at least 7.5 weight percent. Film made from the polyethylene composition may have a machine direction 1% secant modulus of 200 MPa (at a film thickness of about 1 mil) and an oxygen transmission rate (OTR) of &#x2265;550 cmper 100 inch per day (at a film thickness of about 1 mil). Film made from the polyethylene composition retains much of its dart impact performance on downgauging from a thickness of 1 mil to a thickness of 0.75 mil.

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Airdrie, Canada

Brian Molloy