Dual metallocene catalyst for producing film resins with...

Details Dual metallocene catalyst for producing film resins with... Dual metallocene catalyst for producing film resins with...

C - Chemistry, Metallurgy

08

F

C08F 4/6592 (2006.01) C08F 10/02 (2006.01)

Patent

CA 2553993

This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. This invention also relates to methods to prepare and use the catalyst compositions and new polyolefins. The compositions and methods disclosed herein provide ethylene polymers and copolymers with lower MI, increased melt strength, and good MD tear properties.

La présente invention a trait à des compositions de catalyseur comportant un premier composé métallocène, un deuxième composé métallocène, au moins un oxyde solide soumis à un traitement chimique, et au moins un composé organoaluminium. La présente invention a également trait à des procédés de préparation et d'utilisation de compositions de catalyseurs et de nouvelles polyoléfines. Les compositions et procédés de l'invention permettent d'obtenir des polymères et des copolymères d'éthylène à indice de fluidité inférieure, à tenue à la fusion accrue, et de bonnes propriétés de résistance dans le sens machine.

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