Transition metal compound, olefin polymerization catalyst component comprising said compound, olefin polymerization catalyst containing said component, process for olefin polymerization using said catalyst, propylene homopolymer, propylene copolymer and propylene elastomer

摘要

A transition metal compound of formula (I): wherein M is a transition metal of Group IVa, Group Va or Group VIa of the periodic table; each R<1>, which may be identical or different, is a hydrocarbon group of 2 to 6 carbon atoms; each R<2>, which may be identical or different, is an aryl group of 6 to 16 carbon atoms, which may be unsubstituted or substituted with a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms or an organosilyl group; X<1> and X<2>, which may be identical or different, are each a hydrogen atom, a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms, a halogenated hydrocarbon group of 1 to 20 carbon atoms, an oxygen-containing group or a sulfur-containing group; and Y is a divalent hydrocarbon group of 1 to 20 carbon atoms, a divalent halogenated hydrocarbon group of 1 to 20 carbon atoms, a divalent silicon-containing group, a divalent germanium-containing group, -O-, -CO-, -S-, -SO-, -SO2-, -NR<3>-, -P(R<3>)-, -P(O)(R<3>)-, -BR<3>- or -AlR<3>-, wherein R<3> is a hydrogen atom, a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms or a halogenated hydrocarbon group of 1 to 20 carbon atoms.