FIELD: chemistry.
SUBSTANCE: catalyst composition contains: one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and an internal electron donor, containing a bidentate compound having at least two oxygen-containing functional groups which are separated by at least one saturated C2-C10 hydrocarbon chain; one or more aluminium-containing cocatalysts; and an external electron donor containing a mixture of a selectivity determining agent, selected from a group consisting of an alkoxy silane composition and a diether, and an activity limiting agent, selected from a group consisting of an ester of an aromatic mono- or polycarboxylic acid and a fatty acid ester.
EFFECT: catalyst composition does not require use of a phthalate-based internal electron donor and has high stereoselectivity and is self-extinguishing.
10 cl, 3 ex, 1 tbl
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