CATALYST COMPONENT, APPLIED FOR OLEFIN POLYMERISATION, METHOD OF OBTAINING THEREOF AND CATALYST CONTAINING THEREOF Russian patent published in 2014 - IPC C08F4/654 C08F10/00 B01J37/03 

FIELD: chemistry.

SUBSTANCE: described are: a method of obtaining solid disperse particles of a catalyst component, applied for olefin polymerisation, which contains magnesium, titanium, halogen and a donor of electrons as essential composite parts, a catalyst, containing the said catalyst component, and a method of polymerisation. The method of obtaining the catalyst component includes the following stages: (1) dissolution of a magnesium halogenide in a dissolving system with the formation of a homogenous solution and optional addition of compound C - the internal donor of electrons - into the said mixture before dissolution, in the course of dissolution or after dissolution; (2) combination of a titanium compound and a co-precipitating agent with the solution from stage (1) with the formation of a mixture; (3) slow heating of the mixture from stage (2) to a temperature from 60 to 110°C, with compound D - internal donor of electrons - being optionally added in the course of heating or after heating and after achievement of a specified temperature the mixture is mixed for 0.5 to 8 hours, after which mother liquor is removed by filtration and a residual solid substance is washed with an inert solvent to obtain a magnesium- and titanium-containing solid substance; and (4) the magnesium- and titanium-containing solid substance from stage (3) is one or several times processed with the titanium compound and an optional compound E - internal donor of electrons - in an inert solvent with further washing of a solid substance with an inert solvent to obtain the catalyst component. The co-precipitating agent represents a combination of a co-precipitating agent A and a co-precipitating agent B. The agent A is, at least, one diol ester, represented by general formula (I): , in which radicals from R₁ to R₆ and from R¹ to R²ⁿ are given in the invention formula. The agent B represents, at least, one organic silane, represented by general formula (II): $$R_a^I{R}_b^{II}Si{\left(O{R}^{III}\right)}_c$$ , in which R^I and R^II are given in the invention formula.

EFFECT: method makes it possible to efficiently control precipitation of the catalyst component particles and thus obtain with the high output the catalyst component, possessing good particle morphology and narrow distribution of particles by size, the catalyst component in the application together with a co-catalyst in olefin polymerisation demonstrates high catalytic activity, good response to hydrogen addition, good characteristic of stereoregularity and good kinetic characteristics and makes it possible to obtain a polymer with the small content of fine particles.

14 cl, 8 tbl, 10 ex