Catalyst components for polymerizing ethylene

Details Catalyst components for polymerizing ethylene Catalyst components for polymerizing ethylene

C - Chemistry, Metallurgy

08

F

252/93

C08F 4/62 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1171062

ABSTRACT OF THE DISCLOSURE There are disclosed components of catalyst for polymer- izing ethylene and mixtures of ethylene with alpha-olefins comprising the reaction product of (A) a magnesium compound, such as Mg-chloride, Mg-alcoholate or a Grignard compound, with (B) a titanium, vanadium or zirconium compound having at least two metal-oxygen bonds, such as a tetra-alcoholate, and with (C) a halogenated compound of metals of B, such as Ti tetra- chloride. According to an aspect of the invention, the reaction product (A) + (B), before being reacted with (C), is treated with a silicium compound having a halogenating and/or reducing action. The catalysts according to the invention are suitable for obtaining ethylene polymers having a broad distribution of molecular weights.

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