Homopolymers and copolymers of ethylene

Details Homopolymers and copolymers of ethylene Homopolymers and copolymers of ethylene

C - Chemistry, Metallurgy

08

F

C08F 210/16 (2006.01) C08F 4/6592 (2006.01) C08F 110/02 (2006.01) C08J 5/18 (2006.01)

Patent

CA 2316165

Ethylene homopolymers and copolymers having a broad molecular distribution, excellent toughness and improved processability are disclosed. These polymers may be prepared by use of a single metallocene catalyst system in a single reactor in the gas phase. These polymers of density typically 0.85-0.95 are defined in particular by their melt strength (MS) and long chain branching (LCB) characteristics and are particularly suitable for use in low density film applications.

L'invention concerne des homopolymères et des copolymères d'éthylène, ayant une répartition moléculaire large, une excellente ténacité et une aptitude au traitement accrue. On peut préparer ces polymères en utilisant un seul système catalyseur métallocène dans un seul réacteur, en phase gazeuse. Ces polymères, qui présentent généralement une densité de 0,85 à 0,95, se caractérisent par leur résistance à la fusion et leurs caractéristiques de ramification longue. Ils sont particulièrement utiles dans le domaine des films basse densité.

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