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US 9,540,465 B2Granted
Boron-bridged metallocene catalyst systems and polymers produced therefrom
AssigneeChevron Phillips Chemical Company LP
InventorsJeffrey F. Greco, Qing Yang, Tony R. Crain
Life of this patent
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Abstract
Disclosed herein are catalyst compositions containing boron bridged, cyclopentadienyl-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene homopolymers produced using these catalyst compositions can be characterized by a density less than 0.97 g/cm3 and a melt index greater than 50 g/10 min.
Claims20
An ethylene homopolymer having:
- a melt index greater than or equal to about 100 g/10 min;
- a density of less than or equal to about 0.970 g/cm3;
- a Mn in a range from about 5,000 to about 20,000 g/mol;
- a ratio of Mw/Mn of less than or equal to about 4;
- and
- less than about 0.008 long chain branches per 1000 total carbon atoms.
3 more elements
An ethylene homopolymer having:
- a melt index in a range from about 100 to about 1000 g/10 min;
- a density in a range from about 0.960 to about 0.970 g/cm3;
- and
- less than about 0.008 long chain branches per 1000 total carbon atoms.
1 more element
Dependencies are inferred from the claim text.