| 1. An ethylene copolymer having a polymodal CD wherein under temperature rising elution fractionation (TREF) analysis the
ethylene copolymer evidences at least two peaks, an Mw/Mn value of from 2.5 to about 7, and a density of from 0.905 to 0.95
g/cc, said ethylene copolymer made by a process for polymerizing olefine(s) in the presence of a catalyst system comprising
a hafnium metallocene catalyst compound represented by the formula:
(C5H5-d-fR″d)eR′″fHfQ4-c
wherein (C5H5-d-fR″d) is a substituted cyclopentadienyl ligand bonded to Hf wherein at least one (C5H5-d-fR″d) is substituted with at least one R″, wherein said R″ is selected, from one or more of n-propyl, or n-pentyl, each additional
R″, which can be the same or different is hydrogen or a substituted or unsubstituted hydrocarbyl having from 1 to 30 carbon
atoms or combinations thereof or two or more carbon atoms are joined together to form a part of a substituted or unsubstituted
ring or ring system having 4 to 30 carbon atoms, R′″ is one or more or a combination of the group consisting of carbon, germanium,
silicon, phosphorous, and nitrogen atoms containing radical bridging two (C5H5-d-fR″d) rings, or bridging one (C5H5-d-fR″d) ring to Hf, each Q which can be the same or different is selected from the group consisting of a hydride, substituted and
unsubstituted hydrocarbyl having from 1 to 30 carbon atoms, halogen, alkoxides, aryloxides, amides, phosphides and combinations
thereof; two Q's together form an alkylidene ligand or cyclometallated hydrocarbyl ligand or other divalent anionic chelating
ligand; d is 1, 2, 3, or 4; f is 0 or 1; and e is 1, 2 or 3, said catalyst system further comprising an activator and a support.
|