Abstract: 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.

Abstract: The copolymerization of ethylene with vinylcyclohexane (VCH) is carried out with a catalyst system comprising a bridged hafnocene. High levels of vinylcyclohexane incorporation can be achieved affording ethylene-vinylcyclohexane copolymers having low degrees of crystallinity as measured by differential scanning calorimetry (Xc in %). These copolymers have good barrier properties when made into film.

Abstract: The copolymerization of ethylene with vinylcyclohexane is carried out with a catalyst system comprising a bridged hafnocene. When relatively low levels of vinylcyclohexane are incorporated, the ethylene-vinylcyclohexane copolymers have high degrees of crystallinity as measured by differential scanning calorimetry (Xc in %). These copolymers have good thermoformability.

Abstract: 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.

Abstract: A four component additive package that contains a first phosphite, a second phosphite, a primary antioxidant and an optical brightener is used in combination with a polyethylene that is polymerized with a mixed catalyst system that contains two different types of catalysts. The stabilized polyethylene exhibits improved color performance.

Abstract: 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 Mw/Mn of <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 Mw/Mn of <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 Mw/Mn of <2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene.

Abstract: Provided in this disclosure is an ethylene interpolymer composition. The ethylene interpolymer composition includes a first ethylene interpolymer, a second ethylene interpolymer, and a third ethylene interpolymer. Further, the ethylene interpolymer composition has a density of at least 0.945 g/cm3; an environmental stress crack resistance (ESCR), measured according to ASTM D1693, Condition B, 10% IGEPAL CO-360, of at least 90 hours; and an Izod impact strength of at least 80 J/m, as measured according to ASTM D256.

Abstract: A medium pressure solution phase polymerization process is provided in which the amount of long chain branching present in an ethylene/1-octene copolymer is controlled with a bridged hafnocene polymerization catalyst in the presence of different polymerization process conditions.

Abstract: 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.

Abstract: 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.

Abstract: 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 Mw/Mn of <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 <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 >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 (I21/I2) of ?50 and an area Dimensional Thermoformability Index (aDTI) at 105° C. of less than 15.

Abstract: 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.

Abstract: 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 Mw/Mn of <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 Mw/Mn of <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 Mw/Mn of <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 Mw/Mn of >2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene.

Abstract: An interpolymer product comprising: a first ethylene interpolymer comprising ethylene and an ?-olefin having a weight-average molecular weight (Mw) of greater than 250,000 and a density of less than 0.930 g/cm3, and a second ethylene interpolymer comprising ethylene and an ?-olefin wherein the second ethylene interpolymer comprises a Mw of less than 70,000 and a density of greater than 0.930 g/cm3; and wherein the interpolymer product comprises an environmental stress crack resistance (ESCR), measured according to ASTM D1693, Condition B, 10% IGEPAL CO-630, of greater than 90 hours. The interpolymer product may be manufactured in a continuous solution polymerization process utilizing at least two reactors employing at least one single site catalyst formulation and at least one heterogeneous catalyst formulation.

Abstract: A polyethylene composition which when made into a film layer having a thickness of about 1 mil exhibits a machine direction (MD) 1% secant modulus of ?190 MPa and an oxygen transmission rate (OTR) of ?650 cm3 per 100 inch2 per day, and when made into a film layer having a thickness of about 2 mil exhibits a seal initiation temperature (SIT) of ?100° C. and an area of hot tack window (AHTW) of ?160 Newtons·° C.

Abstract: 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 cm3 per 100 inch2 per 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.

Abstract: 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.

Abstract: 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 <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 <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 >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 ?190 MPa (at a film thickness of about 1 mil), a seal initiation temperature (SIT) of ?100° C.

Abstract: 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 Mw/Mn of <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 Mw/Mn of <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 Mw/Mn of <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, CDBI50 obtained from a crystallization elution fractionation (CEF) analysis of <45 weight %.

Abstract: 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 <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 Mw/Mn of >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 >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 ?MPa (at a film thickness of about 1 mil), a seal initiation temperature (SIT) of ?90° C.