High strength polyethylene film

Details High strength polyethylene film High strength polyethylene film

C - Chemistry, Metallurgy

08

F

C08F 210/02 (2006.01) C08F 2/34 (2006.01) C08F 4/64 (2006.01) C08F 4/646 (2006.01) C08F 10/00 (2006.01) C08J 5/18 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2193758

A process comprising contacting ethylene and at least one alpha-olefin comonomer having 3 to 8 carbon atoms with a magnesium/titanium based catalyst system including a supported or spray dried catalyst precursor, which contains an electron donor, and a cocatalyst in at least one fluidized bed reactor, in the gas phase, under polymerization conditions, with the provisos that: (i) the cocatalyst is triethylaluminum and a sufficient amount of cocatalyst is added to activate the catalyst precursor; and (iii) the atomic ratio of aluminum to titanium is in the range of about 10:1 to about 22:1.

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