FIELD: chemistry.
SUBSTANCE: invention describes catalyst components for olefin polymerisation. Catalyst component is obtained by reacting magnesium, titanium, halogen and internal electron donor, internal electron donor comprises an imine described by general formula Z, formula I or formula II, where values of radicals are given in patent claim. Invention also describes methods of producing catalyst components and an olefin polymerisation catalyst containing a catalyst component. 
General formula Z,
Formula I, 
Formula II.
EFFECT: when using the catalyst disclosed in the present invention, catalyst activity and the isotacticity index of the obtained polymer are high in the olefin polymerisation reaction and the catalyst activity decreases slowly and the molecular weight distribution of the obtained polymer is wider.
27 cl, 6 tbl, 21 ex
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