Catalyst compositions for the polymerization of olefins

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 10/00 (2006.01) B01J 31/18 (2006.01) B01J 31/24 (2006.01) C07C 251/36 (2006.01) C07C 257/14 (2006.01) C07D 233/96 (2006.01) C07D 241/06 (2006.01) C07D 265/30 (2006.01) C07D 285/10 (2006.01) C07D 319/12 (2006.01) C07D 339/08 (2006.01) C07D 513/04 (2006.01) C07D 521/00 (2006.01) C07F 9/50 (2006.01) C07F 15/00 (2006.01) C07F 15/02 (2006.01) C07F 15/04 (2006.01) C07F 15/06 (2006.01) C08F 4/70 (2006.01) C08F 110/02 (2006.01)

Patent

CA 2276254

The present invention includes novel ligands which may be utilized as part of a catalyst system. A catalyst system of the present invention is a transition metal-ligand complex. In particular, the catalyst system includes a transition metal component and a ligand component comprising a Nitrogen atom and/or functional groups comprising a Nitrogen atom, generally in the form of an imine functional group. In certain embodiments, the ligand component may further comprise a phosphorous atom. Preferred ligand components are bidentate (bind to the transition metal at two or more sites) and include a nitrogen- transition metal bond. The transition metal-ligand complex is generally cationic and associated with a weakly coordinating anion. A catalyst system of the present invention may further comprise a Lewis or Bronsted acid. The Lewis or Bronsted acid may be complexed with the ligand component of the transition metal-ligand complex.

La présente invention concerne de nouveaux ligands qui peuvent être utilisés en tant que parties d'un système catalyseur. Un système catalyseur selon la présente invention est un complexe métal de transition-ligand. Le système catalyseur comporte en particulier un composant métal de transition et un composant ligand contenant un atome d'azote et/ou des groupements fonctionnels contenant un atome d'azote et se présentant généralement sous la forme d'un groupement fonctionnel imine. Selon certains modes de réalisation, le composant ligand peut en outre contenir un atome de phosphore. Les composants ligands préférés sont bidentés (liaison au métal de transition en deux endroits ou d'avantage) et comportent une liaison azote-métal de transition. Le complexe métal de transition-ligand est généralement cationique et associé à un anion à liaison de coordination faible. Un système catalyseur selon la présente invention peut en outre contenir un acide de Lewis ou un acide de Brönsted. L'acide de Lewis ou l'acide de Brönsted peuvent former un complexe avec le composant ligand du complexe métal de transition-ligand.

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