Ethylene copolymer compositions

An ethylene copolymer comprising repeating units of ethylene and at least one comonomer selected from a compound represented by the formula H2C═CHR wherein R is a C1-C20 linear, branched or cyclic alkyl group or a C6-C20 aryl group, and a C4-C20 linear, branched or cyclic diene, the ethylene copolymer is prepared by a process comprising copolymerizing said ethylene with said comonomer by continuous slurry polymerization in the presence of a solid catalyst system consisting essentially of:

• a support, a constrained geometry transition metal compound, and an activator capable of converting the constrained geometry transition metal compound into a catalytically active transition metal complex, wherein the activator is fixed or bonded to the support prior to the addition of the constrained geometry transition metal compound.