Catalyst useful for polymerizing olefins

Details Catalyst useful for polymerizing olefins Catalyst useful for polymerizing olefins

1977-09-26

1979-07-03

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252431C, 526124, 526125, 526127, 526128, 252431R, 252431N, C08F 464, C08F 468

Patent

active

041599659

ABSTRACT:
A catalyst useful for polymerizing olefins, capable of providing an extremely high catalyst efficiency, excellent grain size and high bulk density of polymer; production of polymer having various molecular weight distributions from a broader range to a narrower range and controlling of die swell of formed polymer, by using a mechanical grinding and contacting means. Said catalyst shows a high activity and higher stereoregularity in the polymerization of polypropylene when it is used together with an electron donor compound.
Said catalyst comprises a solid catalyst component (A) and an organometallic compound (B), said catalyst component (A) is obtained by reacting a specified organomagnesium component (i) with a specified chlorosilane compound (ii) and reacting and/or grinding-contacting the solid obtained by the reaction of (i) and (ii) with a titanium and/or vanadium compound containing at least one halogen atom.
The organomagnesium component is of the formula

REFERENCES:
patent: 3670043 (1972-06-01), Kubicek et al.
patent: 3676418 (1972-07-01), Tashiro et al.
patent: 3784481 (1974-01-01), Lassau et al.
patent: 3823196 (1974-07-01), Morikawa et al.
patent: 4004071 (1977-01-01), Aishima et al.
patent: 4027089 (1977-05-01), Aishima et al.

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