METHOD OF PRODUCING MODIFIED METALLOCENE CATALYST, PRODUCED CATALYST AND ITS APPLICATION Russian patent published in 2017 - IPC C08F4/76 C08F10/02 C08F110/06 

FIELD: chemistry.

SUBSTANCE: system comprises, as elements or components: (A) at least, one metallocene precursor compound of the catalyst, which is, at least, one transition metal compound represented by the formula Cp*_qZL^x_mL^y_nL³_p (I), where the radicals are as defined in the claims, q is an integer of 1 or 2, and is a number of Cp* groups bonded to Z, m is an integer of 0 or 1 and is a number of L^x groups bonded to Z, n is an integer of 0 to 3, p is an integer of 1 to 3, the sum of (q+m+p) is equal to the formal oxidation state Z, provided that when any of the groups L^x, L^y and L³ contains hydrocarbyl, the said L group does not mean Cp*, or a polymerisationally active metallocene compound; (B) at least, one titanium-containing metallocene compound; and (A) is a metallocene compound of a catalyst precursor, (C) at least, one compound selected from the group consisting of: (c1) an ionizing ionic compound and (c2) an organoaluminum compound. Moreover, the titanium-containing metallocene compound is inactive with respect to the polymerization of olefins, or when the titanium-containing metallocene compound initially has an activity or is capable of being activated with respect to the polymerization of olefins and thus includes titanium with a degree of oxidation of Ti⁺⁴, titanium in this compound is reduced to the oxidation state of Ti⁺³, so that the titanium-containing metallocene compound becomes inactive before or simultaneously with the use of a catalyst system for the polymerization of olefins. A method of producing a catalyst system and a method of homopolymerizing an olefin or copolymerizing an olefin are also provided.

EFFECT: catalytic system allows to produce polyolefins having the desired combination of properties, including melt index and molecular weight distribution.

24 cl, 8 tbl, 6 dwg, 64 ex