FIELD: chemistry.
SUBSTANCE: present invention relates to a procatalyst composition for producing a catalyst used for olefin polymerisation. Said composition includes a combination of a magnesium-containing component, a titanium-containing component and an internal electron donor containing adamantane dicarboxylate, where the adamantane dicarboxylate has the structure (III) 
where R1, R2 are identical or different, each of R1 and R2 is selected from a group consisting of a substituted hydrocarbyl group containing 1-20 carbon atoms, an unsubstituted hydrocarbyl group containing 1-20 carbon atoms and combinations thereof. The invention also relates to a catalyst composition for polymerisation of olefins, which contains said procatalyst composition, and a method of producing an olefin-based polymer using said catalyst composition.
EFFECT: adamantane-based catalyst composition enables to obtain propylene-based olefins which are characterised by high isotacticity and a wide molecular weight distribution.
16 cl, 3 tbl, 7 ex
