Loading patent…
AssigneeChevron Phillips Chemical Company LP
InventorsMax McDaniel, Elizabeth Benham, Steven Secora, Michael Jensen, Kathy Collins
Estimating the term…
Methods of polymerizing at least one olefin include contacting the olefin with a catalyst comprising chromium and with a cocatalyst comprising a non-transition metal cyclopentadienyl (Cp) compound. The polymerization may be performed in the presence of hydrogen. Using the cocatalyst in conjunction with the catalyst increases several properties, such as the high load melt index (HLMI), the MW, and the MN, of the polymers produced by this polymerization method. Polymer compositions produced by such methods have various unique properties, including a PDI greater than about 30. Additional embodiments include articles of manufacture or end use articles formed from such polymer compositions.
A method of polymerizing at least one olefin, comprising contacting the at least one olefin with a catalyst comprising chromium and with a cocatalyst comprising a non-transition metal cyclopentadienyl (Cp) compound.
A polymer composition having a MW greater than about 600,000 g/mol and a MI in a range of from about 0.01 g/10 min to about 10 g/10 min.
A polymer composition having a MW greater than about 400,000 g/mol and an Eo less than about 108 Pa.s.
A polymer composition having a rheological breadth parameter greater than about 0.15 and a PDI greater than about 30.
A polymer composition having a PDI greater than about 30, a Charpy critical temperature less than about 0° C., and a Charpy energy greater than about 50 J/m.
A polymer of ethylene and hexene having a HLMI in a range of from about 15 g/10 min to about 50 g/10 min, a density greater than about 0.952 g/cc, and an ESCR condition A greater than about 250 hours.
A polymer of ethylene and hexene having a HLMI in a range of from about 15 g/10 min to about 50 g/10 min, an ESCR condition A greater than about 800 hours, and a weight swell less than about 700%.
A polymer of ethylene and hexene having a HLMI in a range of from about 15 g/10 min to about 50 g/10 min, an ESCR condition A greater than about 800 hours, and a weight swell less than that exhibited by the commercial resin HHM 5502 when molded under control conditions.
A polymer of ethylene and hexene having a HLMI in a range of from about 15 g/10 min to about 50 g/10 min, an ESCR condition A greater than about 800 hours, and an onset of melt fracture greater than about 26,000 /sec.
A polymer of ethylene and hexene having a HLMI in a range of from about 15 g/10 min to about 50 g/10 min, an ESCR condition A greater than about 800 hours, and an onset of melt fracture greater than that exhibited by the commercial resin HHM 5502 when molded under control conditions.
Dependencies are inferred from the claim text.