Components and catalysts for the polymerization of olefins

C - Chemistry – Metallurgy – 08 – F

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C08F 4/651 (2006.01) C07C 69/38 (2006.01) C07C 69/63 (2006.01) C08F 4/654 (2006.01) C08F 10/00 (2006.01) C08F 10/06 (2006.01)

Patent

CA 2315179

The present invention relates to catalyst components for the polymerization of olefins, and to the catalyst obtained therefrom, particularly suitable for the stereospecific polymerization of olefins, comprising Ti, Mg, halogen and an electron donor compound selected from heteroatom containing esters of malonic acids (heteroatom containing malonates). 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 des composants catalyseurs de polymérisation d'oléfines ainsi que le catalyseur obtenu, aptes notamment à la polymérisation stéréospécifique d'oléfines, comprenant Ti, Mg, halogène et un composé donneur d'électrons choisi parmi des esters d'acides maloniques contenant des hétéroatomes (malonates contenant des hétéroatomes). Lesdits composants catalyseurs, lorsqu'ils sont utilisés dans la polymérisation d'oléfines et en particulier le propylène, sont capables de donner des polymères à haut rendement et avec un indice isotactique élevé exprimé en terme d'insolubilité élevée du xylène.

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