Catalyst, process for preparation of same, and process for polym

Details Catalyst, process for preparation of same, and process for polym Catalyst, process for preparation of same, and process for polym

1990-07-11

1991-09-17

Garvin, Patrick P.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502127, C08F 464

Patent

active

050495330

ABSTRACT:
Disclosed is a catalyst composition for use in the polymerization of olefins, which is comprised of (a) a catalyst component containing magnesium, titanium, a halogen, and an ingredient derived from a keto-ester compound, and (b) an organic aluminum compound. The catalyst activity and capability of providing a highly stereoregular polymer are enhanced by preparing the catalyst component (a) by a process wherein, during or after the formation of a solid catalyst component containing magnesium, titanium, and a halogen, the solid catalyst component is treated with a keto-ester of the formula: ##STR1## wherein R.sup.1, R.sup.2 and Z represent a hydrocarbon group.

REFERENCES:
patent: 4496660 (1985-01-01), Gessell et al.

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