ИСТИНА

The invention relates to a pyridine-2,6-bis(phenylenephenolate) complexes that are useful as catalyst components for olefin polymerization and have improved solubility in non-aromatic hydrocarbons (e.g., isohexane). The improved solubility of these complexes was accomplished by the modification of the ligand framework at a specific position that led to improved solubility, but did not adversely affect the performance of the complex when used as a catalyst for olefin polymerizations A catalyst system, comprising an activator, preferably a non-aromatic hydrocarbon, and optionally a support material, and the catalyst compound, is also claimed. The invention also relates to a homogeneous solution, comprising: an aliphatic hydrocarbon solvent; and at least one catalyst compound, with a concentration of the at least one catalyst compound of ≥ 0.20 wt% (alternatively ≥ 0.25 wt%, alternatively ≥ 0.30 wt%, alternatively ≥ 0.35 wt%, alternatively ≥ 0.40 wt%, alternatively ≥ 0.50 wt%, alternatively ≥ 1.0 wt%, alternatively ≥ 2.0 wt%). The invention also directs to a process for the production of a propylene or ethylene based polymer or copolymer, comprising: polymerizing propylene and/or ethylene and an optional comonomer by contacting the propylene and/or ethylene and an optional comonomer with a catalyst system, in one or more continuous stirred tank reactors or loop reactors, in series or in parallel, at a reactor pressure of 0.05 - 1,500 MPa and a reactor temperature of 30 - 230° to form the propylene or ethylene based polymer or copolymer.