FIELD: polymerization.
SUBSTANCE: present invention relates to a solid catalytic component for olefin polymerization, a method for producing a solid catalytic component of a catalyst, an olefin polymerization catalyst, a method for producing olefin polymer, a method for producing propylene copolymer, and propylene copolymer. The solid catalytic component includes titanium, magnesium, a halogen atom and an internal electron donor, where the solid catalytic component has a multimodal pore distribution by volume measured by mercury porometry, and has one or more peaks in each range of the pore radius range from 0.002 to 1 mcm and the pore radius range from more than 1 to 30 mcm or less, and a ratio, which is a ratio of the pore volume V1 obtained from pores in the radius range from 0.002 to 1 mcm to the pore volume V2 obtained from pores in the radius range from more than 1 to 30 mcm or less, is from 0.30 to 0.65, where the total pore volume measured by mercury porometry is from 0.65 to 2.00 cm3/g. The method for producing a solid catalytic component includes a stage of bringing a magnesium compound having an alkoxy group, a titanium halogenide compound and an internal electron donor into contact with each other, where, for contact between the magnesium compound and the titanium halogenide compound, the magnesium compound is added to the titanium halogenide compound or, alternatively, the titanium halogenide compound is added to the magnesium compound continuously or periodically for 2 hours or more, while maintaining a temperature of 15°C or lower, where the magnesium compound having an alkoxy group is dialkoxymagnesium. The resulting propylene copolymer has the pore volume from 0.10 to 0.23 cm3/g measured by mercury porometry, where the sum of pore volumes in the pore radius range from 1 to 20 mcm is from 0.09 to 0.21 cm3/g.
EFFECT: creation of a solid catalytic component for olefin polymerization, which is capable of producing polymer that has very low adhesion capability associated with the adhesiveness (stickiness) of polymer particles, has excellent fluidity and also has a favorable particle size distribution in order to polymerize olefins.
20 cl, 1 dwg, 5 tbl, 8 ex
