A method of polymerizing olefins is disclosed. The method comprises contacting ethylene and at least one comonomer with a catalyst system to produce a polyolefin polymer that is multimodal. The catalyst system comprises a first catalyst that promotes polymerization of the ethylene into a low molecular weight (LMW) portion of the polyolefin polymer and a second catalyst that promotes polymerization of the ethylene into a high molecular weight (HMW) portion of the polyolefin polymer. The first catalyst and at least a portion of the second catalyst are co-supported to form a commonly-supported catalyst system and at least a portion of the second catalyst is added as a catalyst trim feed to the catalyst system.
申请公布号
CA2938843(A1)
申请公布日期
2015.08.20
申请号
CA20152938843
申请日期
2015.02.10
申请人
UNIVATION TECHNOLOGIES, LLC
发明人
VANDERLENDE, DANIEL D.;HARLAN, JEFF C.;PENG, HAIQING;AWE, MICHAEL D.;KUHLMAN, ROGER L.;LUE, CHING-TAI;LYNN, TIMOTHY R.;MARIOTT, WESLEY R.;ZILKER, DANIEL P., JR.