Process for Making Ethylene Interpolymers and Interpolymers Made Thereby, and Compositions and Electrical Devices Containing Such Interpolymers

摘要

The invention relates to a continuous polymerization process for preparing a random ethylene interpolymer which comprises: (A) polymerizing ethylene, and an α-olefin comonomer selected from propylene and/or 1-butene, and mixtures thereof, under continuous random polymerization conditions in the presence of single site catalyst system employing an ionic activator having cyclic ligands shielding a central charge bearing atom, at a temperature of 140° C. to 250° C. at a conversion of ethylene of 80 to 99% and a comonomer conversion of from at least 20%; and (B) devolatilizing the polymer to provide an ethylene copolymer having a density of from 0.85 to 0.92 g/cm³, an MI of from 0.01 to 100 g/10 min and an I₂₁/I₂ of from 30 to 400.