FIELD: chemistry.
SUBSTANCE: present invention relates to the field of synthesis of polyolefins and, more specifically, to a composition for the use with a polymerization catalyst, a catalytic composition, and a method for olefin polymerization. The composition for the use with a catalyst of polymerization of mixtures containing olefin contains: a selectivity regulation agent containing at least one silicon-containing compound with at least one C1-C10-alkoxy group bound with a silicon atom; and one or several compounds of an activity limitation agent, wherein the specified compound is composite esters – valerate or hexanoate. The catalytic composition for polymerization contains: one or several polymerization catalysts, which is solid Ziegler-Natt catalyst on substrate, containing Mg and Ti, and the above-mentioned composition for the use with a polymerization catalyst. The polymerization method includes contact of olefin or a mixture of olefin and one or several copolymerized comonomers under polymerization conditions with the catalytic composition.
EFFECT: invention minimizes the introduction of volatile organic compounds (VOC) and increases service life of a catalytic composition.
20 cl, 5 tbl
