Catalyst system for use in preparing isotactic polyolefin, comprises chiral coordination compound(s) of main group element, e.g. aluminum, silicon, or gallium, as central atom, and co-catalyst(s)

摘要

A catalyst system is obtained by reacting chiral coordination compound(s) of main group element selected from aluminum, silicon, phosphorus, sulfur, gallium, germanium, arsenic, selenium, indium, tin, antimony, tellurium, thallium, lead, bismuth, or polonium as central atom, and co-catalyst(s) capable of converting the chiral coordination compound into species which displays polymerization activity toward olefin(s). A catalyst system is obtained by reacting chiral coordination compound(s) of main group element selected from aluminum, silicon, phosphorus, sulfur, gallium, germanium, arsenic, selenium, indium, tin, antimony, tellurium, thallium, lead, bismuth, or polonium as central atom, and co-catalyst(s) capable of converting the chiral coordination compound into species which displays polymerization activity toward olefin(s). The chiral coordination compound comprises two bidentate chelating ligands joined to one another via a bridge, and optionally one or two additional monodentate ligands. The four coordinating atoms of the two chelating ligands surround the main group element as central atom of coordination compound in an approximately planar fashion, and up to two further ligands are located above and below this approximately planar coordination sphere formed by the four coordinating atoms of two chelating ligands. The two further ligands are in trans positions relative to one another. Independent claims are also included for: (1) preparation of polyolefins by polymerization or copolymerization of olefin(s) in the presence of the above catalyst system; (2) a polyolefin obtained by the above process; (3) a polyolefin composition comprising a polyolefin; (4) a film, fiber or molding produced from a polyolefin composition; (5) use of a chiral coordination compound of formula (Ib) or its enantiomer of formula (Ib*) for preparing catalyst system for polymerization of olefins; and (6) preparation of catalyst system by reacting coordination compound(s) (Ib) or (Ib*) with cocatalyst(s). M : Al, Si, P, S, Ga, Ge, As, Se, In, Sn, Sb, Te, Tl, Pb, Bi, or Po; Z : organic or inorganic radical; n1, n2 : 0 or 1; R 1>, R 2>1-40C radical; R 1>and R 2>(together with the atoms connecting them) : cyclic or polycyclic ring system containing heteroatom(s), e.g. N, O, P, S, or Si in place of C atoms in the ring system; R 3>H or 1-40C radical, and displaying lower steric hindrance than R 1>; R 4>H or 1-40C radical, and displaying lower steric hindrance than R 2>; R 5>, R 6>H or 1-40C radical; R 1>and R 3>, R 2>and R 4>, R 1>and R 5>, and/or R 2>and R 6>(together with the atoms connecting them in each case) : cyclic or polycyclic ring system containing heteroatom(s), e.g. N, O, P, S and Si in place of C atoms in the ring system; X : single bond between 2C or a divalent group; Y 1>, Y 2>O, S, Se, Te, NR 9>group, or PR 9>group; R 7>-R 9>H, 1-20C alkyl, 2-20C alkenyl, 6-22C aryl, 1-10C alkyl(6-22c aryl), or 6-22C aryl(1-10C alkyl); T 1>-T 4>H or 1-40C radical; and T 1>and T 3>and/or T 2>and T 4>(together with the carbon atoms connecting them in each case) : cyclic or polycyclic ring system containing heteroatom(s), e.g. N, O, P, S, or Si in place of C atoms in the ring system. [Image] [Image] [Image] [Image].