Patent ID: 11945897
Assignee: CHEVRON PHILLIPS CHEMICAL COMPANY LP
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A polymerization process comprising:
(A) contacting a metallocene compound, a hydrocarbon solvent, and a first organoaluminum compound for a first period of time to form a metallocene solution, and contacting the metallocene solution with an activator-support and a second organoaluminum compound for a second period of time to form a high LCB catalyst composition;
(B) contacting the metallocene compound, the hydrocarbon solvent, the activator-support, and the second organoaluminum compound to form a low LCB catalyst composition;
(C) contacting the high LCB catalyst composition and/or the low LCB catalyst composition with ethylene and an optional olefin comonomer in a polymerization reactor system under polymerization conditions to produce an ethylene polymer having a long chain branch (LCB) content; and
(D) controlling a relative amount of the high LCB catalyst composition and the low LCB catalyst composition in step (C) to adjust the LCB content of the ethylene polymer.