C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 210/16 (2006.01) C08F 4/656 (2006.01) C08F 4/70 (2006.01) C08F 10/02 (2006.01) C08J 5/18 (2006.01) C08L 23/08 (2006.01) D01F 6/30 (2006.01) D01F 6/46 (2006.01)
Patent
CA 2681298
The invention relates to a bimodal or multimodal polyethylene which comprises ethylene homopolymers and/or copolymers of ethylene with .alpha.-olefins, has a polydispersity index Mw/Mn of the low molecular weight component of less than 10 and can be prepared using a polymerization catalyst based on a Ziegler component and a late transition metal component having a tridentate ligand which bears at least two ortho.ortho-disubstituted aryl radicals and also a catalyst system and a process for preparing the polyethylene and also fibers, moldings, films and polymer blends comprising this material.
La présente invention concerne un polyéthylène bimodal ou multimodal qui comprend des homopolymères d'éthylène et/ou des copolymères d'éthylène avec des .alpha.-oléfines, présente un indice de polydispersité Mw/Mn du composant de faible poids moléculaire de moins de 10 et peut être préparé en utilisant un catalyseur de polymérisation à base d'un composant Ziegler et d'un composant métal de transition tardif ayant un ligand tridenté qui porte au moins deux radicaux aryle ortho,ortho-disubstitués. L'invention concerne également un système de catalyseur et un procédé de préparation du polyéthylène, ainsi que des fibres, des moulages, des films et des mélanges de polymères comprenant ce matériau.
Mihan Shahram
Schmitz Harald
Basell Polyolefine Gmbh
Osler Hoskin & Harcourt Llp
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