CATALYTST COMPONENTS FOR POLYMERISATION OF OLEFINS AND CATALYSTS OBTAINED THEREFROM Russian patent published in 2012 - IPC C08F4/655 C08F10/02 B01J37/04 

FIELD: chemistry.

SUBSTANCE: invention relates to catalyst components for polymerisation of olefins. Described are catalyst components for polymerisation of olefins which contain Ti, Mg, Al, CI and optionally OR¹ groups, in which R¹ denotes a C1-C20 hydrocarbon group optionally containing heteroatoms, so as to obtain molar ratio OR¹/Ti less than 0.5, where essentially all titanium atoms are in a valence state equal to 4, and porosity (P_F), which is measured using a mercury method and resulting from pores with radius equal to or less than 1 mcm, is at least 0.30 cm³/g, and that molar ratio Cl/Ti is less than 29. Described are methods of obtaining said components, involving a step (a) where a compound MgCl₂·mR¹¹OH tH₂O, in which 0.3 ≤ m ≤ 1.7, t ranges from 0.01 to 0.6 and R¹¹ denotes an alkyl, cycloalkyl or aryl radical containing 1-12 carbon atoms, reacts with a titanium compound of formula Ti(OR¹)_nX_y-n, in which n lies between 0 and 0.5, y is the valence of titanium, X is a halogen and R¹ is as defined above, in the presence of an aluminium compound of formula AlL₃, where L independently denotes OR¹ groups, in which R¹ denotes a C1-C20 hydrocarbon group or a halogen. Described is a method for polymerisation of olefins, which is realised in the presence of a catalyst system containing a product of reaction of the described catalytic components and an alkylaluminium compound.

EFFECT: described catalyst components are characterised by high morphological stability in low molecular weight ethylene polymerisation conditions while maintaining high activity.

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