FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing propylene polymers. The obtained propylene polymer has melt flow rate (230°C, 2.16 kg) higher than 30 g/10 min. The method is realised in the presence of a catalyst system comprising (a) a solid catalyst component containing Mg, Ti, halogen and an electron donor compound selected from succinates; (b) an alkylaluminium cocatalyst; and (c) a silicon compound of formula R1Si(OR)3, in which R1 is a branched alkyl and R is independently a C1-C10 alkyl. A method of producing a propylene polymer composition and heterophase compositions is also described.
EFFECT: obtaining propylene polymers having a wide molecular weight distribution and high melt flow rate.
11 cl, 3 tbl, 7 ex
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