Polymerization catalysts for producing polymers with low...

Details Polymerization catalysts for producing polymers with low... Polymerization catalysts for producing polymers with low...

C - Chemistry, Metallurgy

08

F

C08F 10/00 (2006.01) C07F 15/00 (2006.01) C08F 4/659 (2006.01)

Patent

CA 2641255

This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging .eta.5-cyclopentadienyl-type ligands, typically in combination with at least one cocatalyst, and at least one activator. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.

La présente invention concerne des compositions de catalyseur, des procédés et des polymères comprenant au moins un composé métallocène du Groupe 4 comprenant des ligands de pontage de type .eta.5-cyclopentadiényle, typiquement en combinaison avec au moins un cocatalyseur et au moins un activateur. Les compositions et les procédés de la présente invention donnent des polymères d'éthylène à faible teneur en ramification à longue chaîne.

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