CATALYST AND METHOD FOR PRODUCING ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE USING THIS CATALYST Russian patent published in 2017 - IPC C08F4/685 C08F4/654 C08F110/02 C08F2/18 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for producing ultra-high molecular weight polyethylene (UHMWPE) using the supported ziegler type catalyst comprising a transition metal compound on a magnesium-containing support. The catalyst for producing ultra-high molecular weight polyethylene-UHMWPE contains a transition metal compound on a magnesium-containing support, which is produced by reacting a solution of an organomagnesium compound of the composition: Mg (C₆H₅)₂n MgCl₂ mR₂O, where: n = 0.37-0.7, m = 2, R₂O is a simple ether with R = i-Am, n-Bu, with the reaction product of alkylchlorosilane of the composition: R'_kSiCl_4-k, where: R' - alkyl or phenyl, k = 0, 1, 2, and silicon tetraalkoxide Si (OEt)₄ taken at the molar ratio R'_kSiCl_4-k, / Si (OEt)₄ = 50-2. As the transition metal compound, a mixture of titanium compounds (TiC₄ or Ti (OEt₎₂Cl₂) and vanadium (VCl₄, VOCl₃). The method for producing ultra-high molecular weight polyethylene UHMWPE in the suspension mode in a hydrocarbon diluent medium is carried out at a polymerization temperature above 70°C in the presence of an organoaluminum cocatalyst using the said catalyst. Herewith an ultra-high molecular weight polyethylene with a molecular weight in the range of 2.5⋅10⁶ up to 8⋅10⁶ g/mol.

EFFECT: using high polymerisation temperatures, which allows to increase reactor productivity and the possibility of producing ultra-high molecular weight polyethylene with the required molecular weight.

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