TITANIUM-CONTAINING COMPONENT OF CATALYST FOR POLYMERIZATION OF ETHYLENE INTO OPEN ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE, CATALYST AND METHOD FOR ITS PREPARATION Russian patent published in 2023 - IPC C07F7/28 C08F4/642 C08F110/02 C08F2/00 

FIELD: catalysts.

SUBSTANCE: production of polyethylene and obtaining reactor powders of ultra-high molecular weight polyethylene (UHMWPE) with a morphology characterized by a small number of molecular entanglements - “open UHMWPE”. A component of the ethylene polymerization catalyst, namely bis{2-[(4-allyloxy-2,3,5,6-tetrafluorophenylimino)methyl]-4-R²-6-R¹-phenoxy}titanium(IV) dichloride has the structure represented by Formula 1, where the substituents R¹ and R² are independently selected from the group consisting of alkyl C₁…C_40, cycloalkyl C₃…C_12, bicycloalkyl C₅…C_10, alkyl aromatic substituent C₇…C₇₀, methoxy group, halogen atom and hydrogen atom. The catalyst for polymerizing ethylene to produce open UHMWPE includes at least one compound of general formula 1, at least one organoaluminum activator, optionally ethylene and at least one hydrocarbon solvent. The method for preparing the catalyst involves mixing in any sequence a compound of general formula 1, an organoaluminum activator, optionally in the presence of ethylene in a hydrocarbon solvent.

EFFECT: production of a catalyst component and an ethylene polymerization catalyst containing this component, and its use to obtain open UHMWPE with an MW of 4.3…16.0 t/mol, melting point 140… 43°C and degree of crystallinity 65-97% and bulk density 0.068…0.117 g×cm^-3.

9 cl, 43 ex, 2 tbl, 3 dwg