SOLID TITANIUM CATALYST COMPONENT FOR POLYMERIZING OLEFIN AND ITS PRODUCTION AND OLEFIN POLYMERIZATION CATALYST CONTAINING THE CATALYST COMPONENT AND POLYMERIZATION OF OLEFIN IN PRESENCE OF THE CATALYST

摘要

PROBLEM TO BE SOLVED: To obtain the subject catalyst component enabling the (co) polymerization of an olefin in high polymerization activity by imparting specific physical properties to a catalyst component containing Ti, Mg, and a halogen as essential components. SOLUTION: This solid titanium catalyst component contains Ti, Mg and a halogen as essential components. Therein, fine crystal sizes calculated from the peak of the face (110) by the X-ray diffraction of a magnesium halide forming the catalyst component are 3-100Å. The total volume of fine pores having radii of <=0.1μm in the catalyst component is <=0.20cm<3> /g, and the total volume of fine pores having radii of 0.1-7.5μm is >=0.30cm<3> /g. The average particle diameter measured by a light transmission sedimentation method is 0.5-80μm. The catalyst component enables the (co)polymerization of an olefin in high polymerization activity. When a >=3Cα-olefin is polymerized, an olefin (co)polymer high in stereoregularity is obtained.