07619047 is referenced by 138 patents and cites 116 patents.

This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η5-cyclopentadienyl-type ligands, in combination with at least one second Group 4 metallocene with non-bridging η5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with a bimodal molecular weight distribution.

Title
Dual metallocene catalysts for polymerization of bimodal polymers
Application Number
11/359972
Publication Number
7619047 (B2)
Application Date
February 22, 2006
Publication Date
November 17, 2009
Inventor
Tony R Crain
Niotaze
KS, US
Jerry T Lanier
Bartlesville
OK, US
Matthew G Thorn
Mason
OH, US
Joel L Martin
Bartlesville
OK, US
Max P McDaniel
Bartlesville
OK, US
Michael D Jensen
Laurel
MD, US
Kumudini C Jayaratne
Bartlesville
OK, US
Qing Yang
Bartlesville
OK, US
Agent
Merchant & Gould P C
Assignee
Chevron Phillips Chemical Company
TX, US
IPC
C08F 4/6592
C08F 4/655
C08F 4/02
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