Inventors:
Harilaos Mavridis - Cincinnati OH
Mark K. Reinking - Mason OH
Ramesh N. Shroff - Cincinnati OH
Joel A. Mutchler - Morris IL
Charles S. Holland - Coal City IL
Keta M. Lindstrom - Channahon IL
Kiran M. Gupte - Naperville IL
Michael H. Treptau - Channahon IL
Francis M. Mirabella - Mason OH
Assignee:
Equistar Chemicals, LP - Houston TX
International Classification:
C08F11002
US Classification:
526352, 526128, 526348, 5261231, 5261243, 526143, 502116, 502115, 502125, 502103
Abstract:
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.