摘要 |
<p>Disclosed herein are various processes, including continuous fluidized-bed gas- phase polymerization processes for making a high strength, high density polyethylene copolymer, comprising (including): contacting monomers that include ethylene and optionally at least one non-ethylene monomer with fluidized catalyst particles in a gas phase in the presence of hydrogen gas at an ethylene partial pressure of 100 psi or more and a polymerization temperature of 120°C or less to produce a polyethylene copolymer having a density of 0.945 g/cc or more and an ESCR Index of 1.0 or more wherein the catalyst particles are prepared at an activation temperature of 700°C or less, and include silica, chromium, and titanium.</p> |
申请人 |
UNIVATION TECHNOLOGIES, LLC;CANN, KEVIN, J.;EISINGER, RONALD, S.;GOODE, MARK, G.;MOORHOUSE, JOHN, H.;MURE, CLIFF, R.;JAKER, STEPHEN, P.;APECETCHE, MARIA, A. |
发明人 |
CANN, KEVIN, J.;EISINGER, RONALD, S.;GOODE, MARK, G.;MOORHOUSE, JOHN, H.;MURE, CLIFF, R.;JAKER, STEPHEN, P.;APECETCHE, MARIA, A. |