COMPOSITION OF OLEFIN (CO)POLYMER, METHOD OF PREPARING THEREOF (VARIANTS), (CO)POLYMERIZATION CATALYST OF OLEFINS, AND METHOD OF PREPARING THEREOF Russian patent published in 2001 - IPC

FIELD: chemistry of polymers. SUBSTANCE: described is olefin (co)polymer composition comprising 0.01-5.0 wt parts of high molecular polyethylene which is ethylene homopolymer or ethylene copolymer with olefin containing 50 wt % or more ethylene units; and 100 wt parts of olefin (co)polymer which is other than high molecular polyethylene in which composition said high molecular polyethylene has characteristic viscosity [η_E] from 15 to100 dl/g measured in tetraline at 135 C or higher, and said high molecular polyethylene is the form of finely dispersed particles having average numerical particle size from 1 to 5000 nm. EFFECT: increased yield of polyethylene, no problem of smell, higher heat resistance, greater melt tension and higher crystallization temperature. 51 cl, 13 dwg