POLYOLEFIN PRODUCTION Russian patent published in 2005 - IPC

FIELD: polymerization catalysts.

SUBSTANCE: invention describes metallocene catalytic component of catalytic system for production of polyolefin with isotactic or syndiotactic/isotactic block structure with length of monomer unit up to C₁₀, said component having general formula R"(CpR₁R₂R₃)(Cp'R₁R₂')MQ₂, where Cp represents cyclopentadienyl ring substituted by at least one substituent; Cp' is substituted fluorenyl ring; R" structural bridge imparting steric rigidity; R₁ optional substituent in cyclopentadienyl ring located at a distance to bridge and including a bulky group XR*₃ wherein X is selected from group IVA elements and R*, the same or different, are hydrogen or hydrocarbon radical containing 1 to 20 carbon atoms; R₂ optional substituent in cyclopentadienyl ring, nearest to bridge and not vicinal to remote substituent, which substituent has formula YR^# wherein Y is selected from group IVA elements and R^#, the same or different, are hydrogen or hydrocarbon radical containing 1 to 7 carbon atoms; R₃ optional substituent in cyclopentadienyl ring, nearest to bridge and being hydrogen or having formula ZR^$ wherein Z is selected from group IVA elements and R^s, the same or different, are hydrogen or hydrocarbon radical containing 1 to 7 carbon atoms; R₁' and R₂' are independent substituents in fluorenyl ring, one of them having formula AR₃’’’ wherein A is selected from group IVA elements and each of R’’’ represents independently hydrogen or hydrocarbon radical containing 1 to 20 carbon atoms and the other being hydrogen or second group AR₃’’’; M is transition metal from group IVB or vanadium and each Q is either hydrocarbon radical with 1-20 carbon atoms or halogen.

EFFECT: enabled preparation isotactic or syndiotactic/isotactic block polymer with length of monomer unit up to C₁₀.

30 cl, 13 dwg, 2 tbl, 10 ex