Catalysts and catalyst components useful for polymerizing...

Details Catalysts and catalyst components useful for polymerizing... Catalysts and catalyst components useful for polymerizing...

C - Chemistry, Metallurgy

08

F

252/109, 402/418

C08F 4/16 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1137068

ABSTRACT OF THE DISCLOSURE There are disclosed new catalyst-forming components obtained by reacting at least the following substance: (a) a halogenated Ti compound containing at least one Ti-halogen bond; (b1) a support an essential constituent of which is a mixture of an oxygenated Mg compound with an ad- duct between a Mg dihalide and at least one elec- tron-donor compound and/or with the product of de composition of said adduct containing Mg dihalide; and/or (b2) the product obtained by treating and oxygenated Mg compound with an electron-donor compound. Also disclosed are catalysts prepared from said new ca- talyst-forming components, as is use of the catalysts in the po- lymerization of olefins, more particularly olefins CH2=CHR in which R is a alkyl or aryl radical having 1-8 carbon atoms, of mixtures of said olefins and of mixtures thereof with ethylene.

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