METALLOCENE CATALYST AND METHOD OF PREPARATION OF POLYOLEFINS

polymerization catalysts. SUBSTANCE: catalyst represents sterilely rigid metallocene compound containing at least two optionally substituted cyclopentadienyl groups as ligands linked to each other through monocyclic annular system, one of cyclopentadienyl groups being annelated to monocyclic system and this ligand system being different from 4-(η5-3-alkylcyclopentadienyl)-4,6,6-trimethyl-(η5-2- alkyl-4,5-tetrahydropentalene) group and defined by formula I: , wherein M is IVb group metal; R1 and R2, identical or different, are halogen atoms, C1-C10-alkyls, or NR123, group with R13 being C1-C10-alkyl; R3,R4,R5,R6,R7,R8 and R9, identical or different, are hydrogen atoms, C1-C10-alkyls, or group -R13-SiR133-, with R13 being as indicated above; R10 is C1-C20-alkyl; R11 and R12, identical or different, are C1-C20-alkyl, C6-C20-aryl, or C2-C12-alkenyl; and n is integer from 1 to 10. Catalyst is applicable in production of polyolefins via polymerization of at least one cycloolefin. EFFECT: enabled production of olefin homopolymers and copolymers with improved physico-chemical properties, especially those with reduced crystallinity, increased impact resistance, elevated transparency, high flowability at processing temperatures, low molecular weight, and reduced melting temperature. 8 cl, 3 tbl, 33 ex