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AssigneeEquistar Chemicals, LP
InventorsHarilaos Mavridis, Mark K. Reinking, Ramesh N. Shroff, Joel A. Mutchler, Charles S. Holland, Keta M. Lindstrom, Kiran M. Gupte, Michael H. Treptau, Francis M. Mirabella
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The present invention provides an ethylene copolymer resin that has unique melt elastic properties not observed in ethylene copolymers heretofore known. Specifically, the ethylene copolymer resin of the present invention when in pelletized form has a reduction in melt elasticity (ER) of 10% or more to a final value of 1.0 or less upon rheometric low shear modification or solution dissolution. Moreover, the resin of the present invention when in reactor-made form exhibits at least a partially reversible increase of 10% or more in ER when pelletizing the same. An ethylene polymerization catalyst, a process of preparing the ethylene copolymer resin and a high-impact film are also provided herein.
An in-situ prepared ethylene copolymer resin comprising ethylene, as the major component, and at least one C4-8 comonomer with the proviso that said resin, when in pelletized form, has a reduction in melt elasticity (ER) of 10% or more upon a rheometric low shear modification or solution dissolution and has a final ER value of 1.0 or less after the rheometric low shear modification or solution dissolution.
An in-situ prepared ethylene copolymer resin comprising ethylene, as the major component, and at least one C4-8 comonomer with the proviso that said resin, when in reactor-made form, exhibits at least a partially reversible Increase of 10% or more in melt elasticity (ER) when pelletizing the same compared with before pelletizing, and said resin, when in pelletized form, has a reduction in ER of 10% or more upon a rheometric low shear modification or solution dissolution and has a final ER value of 1.0 or less after the rheometric low shear modification or solution dissolution.
An ethylene copolymer resin that
Dependencies are inferred from the claim text.