TRANSITION METAL COMPOUND, OLEFIN POLYMERIZATION CATALYST COMPONENT COMPRISING SAID COMPOUND, OLEFIN POLYMERIZATION CATALYST CONTAINING SAID CATALYST COMPONENT, PROCESS FOR OLEFINPOLYMERIZATION USING SAID CATALYST , PROPYLENE HOMOPOLYMER, PROPYLENE COPOLYMER AND PROPYLENE ELASTOMER

摘要

The novel transition metal compound of the inventionis represented by the following formula (I):(see formula I)wherein M is a transition metal; R1 is a hydrocarbon groupof 2 to 6 carbon atoms, R2 is an aryl group of 6 to 16carbon atoms; X1 and X2 are each a halogen atom or thelike; and Y is a divalent hydrocarbon group, a divalentsilicon-containing group or the like.An olefin polymerization catalyst component of thepresent invention comprises the aforementioned transitionmetal compound. An olefin polymerization catalyst of thepresent invention comprises the aforementioned olefinpolymerization catalyst component. The propylenehomopolymer, the propylene copolymer and the propyleneelastomer according to the present invention have suchproperties that the triad tacticity of propylene unitschain is high, a proportion of the inversely units based onthe 2,1-insertion of propylene monomer is in the specificrange, and the intrinsic viscosity [.pi.], as measured indecahydronaphthalene at 135°C, is in the specific range.