| 摘要 |
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) RaCR1(OR4)-CR2R3(OR5) (I), in which Ra 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 Ra and R3, respectively, to form a ring; provided that when Ra 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 |
