Dual reactor polyethylene process using a phosphinimine...

Details Dual reactor polyethylene process using a phosphinimine... Dual reactor polyethylene process using a phosphinimine...

C - Chemistry, Metallurgy

08

F

C08F 10/02 (2006.01) C08F 4/52 (2006.01) C08F 4/622 (2006.01) C08F 210/16 (2006.01) C08J 5/18 (2006.01) C08F 4/659 (2006.01)

Patent

CA 2245375

A dual reactor process for the solution (co)polymerization of ethylene uses a catalyst having a phosphinimine ligand in each of the two reactors. In a preferred embodiment, the two reactors are operated at different temperatures and/or with different cocatalyst systems (such as "alumoxanes" and "ionic activators") for the preparation of linear low density polyethylene ("LLPDE") having a broad molecular weight distribution. Certain LLDPE polymers of this invention have an outstanding balance of physical properties (high dart impact strength and tear strength) excellent optical properties and excellent processability.

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