OLEFIN POLYMERISATION CATALYST COMPONENTS Russian patent published in 2011 - IPC B01J27/10 B01J21/04 B01J31/20 C08F4/654 B01J21/10 B01J21/06 B01J31/14 C08F10/02 

FIELD: chemistry.

SUBSTANCE: invention relates to polymerisation catalyst components and use thereof. Described are olefin polymerisation catalyst components, which are essentially spherically shaped, containing Mg, Ti and a halogen as basic components and containing an electron donor compound of formula (I) R_aCR₁(OR₄)-CR₂R₃(OR₅) (I), in which R_a is a metal group or is condensed with R₄ to form a ring, R₁, R₂ and R₃ independently denote hydrogen or C1-C20 hydrocarbon groups, possibly containing heteroatoms, R₄ and R₅ denote methyl or R₆CO-groups, in which R₆ is a C1-C20-alkyl group, or may be bonded with R_a and R₃, respectively, to form a ring; provided that when R_a and R₄ form a ring, R₅ is methyl. Described also is an olefin CH₂=CHR polymerisation catalyst in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, which includes a product of a reaction between: (a) catalyst components described above, (b) an alkylaluminium compound; described also is use of thereof in polymerisation.

EFFECT: described catalyst enables to obtain polymers having a narrow molecular weight distribution and high apparent density.

8 cl, 2 tbl, 8 ex