Catalyst for the polymerization of olefins

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...

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502104, 502110, 502115, 502119, 502120, 502121, 502123, 502125, 502126, 502127, C08F 460

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active

053107160

ABSTRACT:
A supported solid component of catalyst, for the stereospecific polymerization of propylene and other .alpha.-olefins, is obtained by making a non-activated silica interact in succession with: (i) a magnesium dialkyl or halide of magnesium alkyl; (ii) a halogenating agent selected from silicon, tin and antimony halides; (iii) a titanium tetrahalide; and (iv) a Lewis base. A catalyst for the stereospecific polymerization of propylene and other .alpha.-olefins is composed of: (A) the solid component of catalyst; (B) an aluminium trialkyl or aluminium alkyl halide; and (C) an electron donor compound, capable of forming a complex compound with component (B).

REFERENCES:
patent: 4252670 (1981-02-01), Caunt et al.
patent: 4857613 (1989-08-01), Zolk et al.

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