Elevated pressure polymerization processes with late...

Details Elevated pressure polymerization processes with late... Elevated pressure polymerization processes with late...

C - Chemistry, Metallurgy

08

F

C08F 4/70 (2006.01) C08F 4/50 (2006.01) C08F 10/02 (2006.01) C08F 110/02 (2006.01)

Patent

CA 2257818

The invention encompasses late transition metal catalyst systems and their use in polymerization processes, particularly in solution, 2- phase suspension and super-critical phase polymerization of ethylene- containing polymers. Preferred embodiments include the use of a late transition metal catalyst system comprising a Group 9, 10, or 11 metal complex stabilized by a bidentate ligand structure for polymerization under elevated ethylene pressure, or concentration, conditions.

L'invention concerne des systèmes de catalyseur à base de métal de transition retardée et leur utilisation dans des procédés de polymérisation, notamment dans la polymérisation en phase supercritique, en suspension biphasée et en solution de polymères contenant de l'éthylène. Dans des modes de réalisation préférés, on utilise un système de catalyseur à métal de transition retardée comprenant un complexe contenant un métal de groupe 9, 10 ou 11 et stabilisé par une structure de ligand bidenté pour la polymérisation dans des conditions de pression ou de concentrations d'éthylène élevées.

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