METHOD OF REGULATING RELATIVE ACTIVITY OF VARIOUS ACTIVE CENTRES OF HYBRID CATALYSTS Russian patent published in 2011 - IPC C08F2/38 C08F210/16 C08F4/6592 

FIELD: chemistry.

SUBSTANCE: present invention relates to methods of polymerising olefins in the presence of hybrid catalysts, as well as methods of regulating relative activity of active centres of such hybrid catalysts. Described is a method of producing olefin polymers, involving polymerisation of at least one α-olefin in the presence of a catalyst system to obtain a polymer containing at least a high molecular weight polymer component and a low molecular weight polymer component, in the presence of water in amount of 2-100 pts. mol per mln or carbon dioxide in amount of 2-100 pts. mol per mln, in each case in terms of the entire reaction mixture, where the catalyst system includes at least two different catalyst components and at least one catalyst component which is a transition metal complex selected from Fe, Co, Ni, Pd and Pt, and at least one ligand of general formula (IVe): where each E^1D atom denotes nitrogen, each E^2D atom denotes carbon, R^19D and R^25D each independently denotes arylalkyl with 1-10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, where organic radicals R^19D and R^25D may also be substituted with halogens or a group containing O, R^20D-R^24D each independently denotes hydrogen, C₁-C₁₀-alkyl, 5-7-member cycloalkyl or cycloalkenyl, C₂-C₂₂-alkenyl, C₆-C₄₀-aryl, arylalkyl with 1-10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, -NR^26D ₂> -SiR^26D ₃, where organic radicals R^20D-R^25D may also be substituted with halogens and/or two geminal or vinyl radicals, R^20D-R^25D may also bond to form a 5-, 6- or 7-member ring, radicals R^26D each independently denotes hydrogen, C₁-C₂₀-alkyl, a 5-7-member cycloalkyl or cycloalkenyl, , C₂-C₂₀-alkenyl, C₆-C₄₀-aryl or arylalkyl with 1-10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, and two R^26D radicals may also bond to form a 5- or 6-member ring, u equals 1, each index v equals 1, where the bond between the carbon, which is bonded with one radical, and the neighbouring element E^1D is a double bond. The invention also describes a method of regulating the ratio of the high molecular weight polymer component to the low molecular weight polymer component in the said method, which involves polymerisation of at least one α-olefin at temperature 50-130°Cand pressure 0.1-150 MPa in the presence of a catalyst system which includes at least two different catalyst components, in which carbon dioxide is used in amount of 2-100 pts. mol per mln, in order to reduce the amount of the high molecular weight polymer component or water in amount of 2-100 pts. mol per million in order to reduce the amount the low molecular weight polymer component, where the amount in pts. mol per mln is calculated based on the entire reaction mixture in each case. The invention describes use of carbon dioxide in the said method in order to reduce the ratio of the high molecular weight component to the low molecular weight component in the olefin polymer during polymerisation. The invention also describes use of water in the said method in order to increase the ratio of the high molecular weight component to the low molecular weight component in the olefin polymer during polymerisation.

EFFECT: regulation of the ratio of polymer components formed on active centres of catalyst components.

17 cl, 2 tbl, 7 ex