Components and catalysts for the polymerization of olefins

C - Chemistry – Metallurgy – 08 – F

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C08F 10/00 (2006.01) C08F 10/06 (2006.01)

Patent

CA 2331732

The present invention relates to a solid catalyst component for the polymerization of olefins CH2=CHR in which R is hydrogen or a hydrocarbon radical with 1-12 carbon atoms, comprising Mg, Ti, halogen and an electron donor selected from .beta.-substituted glutarates of a particular formula. Said catalyst components when used in the polymerization of olefins, and in particular of propylene, are capable to give polymers in high yields and with high isotactic index expressed in terms of high xylene insolubility.

La présente invention concerne un catalyseur solide destiné à la polymérisation des oléfines CH¿2?=CHR, où R désigne un hydrogène ou un radical hydrocarboné de 1 à 12 atomes de carbone, comprenant Mg, Ti, un halogène et un donneur d'électron choisi parmi des glutarates .beta.-substitués d'une formule particulière. Les composants dudit catalyseur selon l'invention, lorsqu'ils sont utilisés dans la polymérisation d'oléfines et en particulier du propylène, peuvent produire une grande quantité de polymères ayant un indice isostatique élevé exprimé en termes d'insolubilité élevée de xylène

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