Catalyst components for polymerizing olefins

Details Catalyst components for polymerizing olefins Catalyst components for polymerizing olefins

1981-07-23

1983-06-28

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252429C, 526114, 526116, 526119, 526127, 526128, C08F 464

Patent

active

043904548

ABSTRACT:
There are disclosed components of catalysts for polymerizing 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 tetrachloride.
According to an aspect of the invention, the reaction product (A)+(B), before being reacted with (C), is treated with a silicum 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.

REFERENCES:
patent: 3454547 (1969-07-01), Delbouille et al.
patent: 4190555 (1980-02-01), Takamura et al.
patent: 4199475 (1980-04-01), Welch et al.
patent: 4218339 (1980-08-01), Zucchini et al.

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