METHOD OF PREPARING POLYETHYLENE Russian patent published in 2000 - IPC

FIELD: chemistry of polymers. SUBSTANCE: described is method of preparing polyethylene by polymerization at elevated temperature and pressure in the presence of catalyst consisting of zirconocene and methylalumoxane cocatalyst. Polymerization of ethylene is carried out at 120-140 C and pressure of 4-8 bar in the presence of catalyst comprising, as zirconocene, compound selected from group consisting of ra dimethylsilanediybis-1-(2-methyl-H- phenylindenyl) zirconium dichloride, dimethylsilanediyl- bis-1-(2-methyl-acenenaphthyl) zirconium dichloride, dimethylsilanediyl-bis-1-(2-methyl 4,5-benzoindenyl) zirconium dichloride. EFFECT: high molecular weight polyethylene prepared at high temperature. 8 ex, 1 tbl