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OwnerRobert Ivan Mink, Thomas Edward Nowlin +3inventors
InventorsRobert Ivan Mink, Thomas Edward Nowlin, Sandra Denise Schregenberger, Pradeep P. Shirodkar, Kenneth George Schurzky
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A catalyst composition for the polymerization of one or more 1-olefins (e.g., ethylene) comprises a transition metal catalyst precursor and a cocatalyst, the transition metal catalyst precursor comprising a contact product of an unsubstituted metallocene compound and an aluminum alkyl compound in a hydrocarbon solvent solution. In another embodiment, the transition metal catalyst precursor is bimetallic and contains a non-metallocene transition metal catalyst component. When a bimetallic catalyst precursor is used, the resin product exhibits improved properties, and has a bimodal molecular weight distribution, long chain branching (LCB), and good bubble stability.
A catalyst composition comprising a transition metal catalyst precursor and a cocatalyst, the transition metal catalyst precursor comprising a contact product of an unsubstituted metallocene compound and an aluminum alkyl compound in a hydrocarbon solvent solution.
A catalyst composition comprising a bimetallic transition metal catalyst precursor and a cocatalyst, the bimetallic transition metal catalyst precursor comprising:
An ethylene (co)polymer produced in a single reactor having a bimodal molecular weight distribution, a flow activation energy of at least about 27 kjoule/mole, a density of from about 0.89 to about 0.965 g/cc, a melt index of from about 0.01 to about 0.2 g/10 minutes, a high load melt index (HLMI) of from about 2 to about 100 g/10 minutes, and a melt flow ratio (MFR) of from about 40 to about 300.
Dependencies are inferred from the claim text.