CATALYTIC SYSTEMS AND THEIR APPLYING IN PROCESS OF POLYMERIZATION Russian patent published in 2004 - IPC

FIELD: organic chemistry, chemical technology, catalysts.

SUBSTANCE: invention relates to a method for polymerization of olefin (olefins) in the presence of catalytic system comprising hafnium-containing catalytic compound with element of the group 15 of Periodic system of elements. Method is carried out at temperature in the range from 50^oC to 200^oC and hafnium-containing catalytic compound with element of the group 15 corresponds to the formula:

wherein M means hafnium; X means similar anionic removing groups; L means atom of element of the group 15; n means degree of oxidation of M; m means formal charge of Y, Z and L; Y and Z means atom of element of the group 15; R¹ and R² means (C₂-C₂₀)-hydrocarbon group; R³ means hydrogen atom; R⁴ and R⁵ means aryl group, substituted aryl group. Also, invention claims a method for polymerization of olefin (olefins) in the presence of catalytic system comprising bidentate or tridentate ligated hafnium-containing catalytic compound with element of the group 15 wherein hafnium atom is bound with at least one anionic removing group and with at least two atoms of elements of the group 15 and wherein at least one of at least two atoms of elements of the group 15 is bound with atom element of the group 15 through bridge group, metallocene catalytic compound with bulky ligand and activating agent. Catalytic system elicits the enhanced activity, provides preparing polyolefins that can be processed being preferably in a single reactor and eliciting necessary combinations for processing, mechanical and optical properties.

EFFECT: valuable properties of catalytic systems.

18 cl, 2 dwg, 1 tbl, 16 ex