Abstract: Provided is an olefin polymerization catalyst characterized by including (I) a solid catalyst component for olefin polymerization containing at least magnesium, titanium, halogen, and an internal electron-donating compound, (II) an organoaluminum compound, and (III) an external electron-donating compound, in which in the olefin polymerization catalyst, there exist, as the internal electron-donating compound, at least one or more compounds selected from a first internal electron-donating compound and one or more compounds selected from a second internal electron-donating compound, and as the external electron-donating compound, there exist at least one or more compounds selected from an alkoxysilane compound and an aminosilane compound.

Abstract: Provided is an olefin polymerization catalyst including: (I) a solid catalyst component for olefin polymerization containing at least magnesium, titanium, halogen, and as an internal electron-donating compound, one or more compounds selected from succinate diester compounds and one or more compounds selected from phthalate diester compounds; (II) an organoaluminum compound; and (III) as an external electron-donating compound, at least one or more compounds selected from alkoxysilane compounds and one or more compounds selected from (alkylamino)alkylsilane compounds. According to the present invention, an olefin polymerization catalyst that can produce an olefin polymer having a high flexural modulus and a high impact resistance, and a method for producing an olefin polymer using the catalyst can be provided.

Abstract: Provided is an olefin polymerization catalyst characterized in that the catalyst includes (I) a solid catalyst component for olefin polymerization containing at least magnesium, titanium, halogen and an internal electron-donating compound, (II) an organoaluminum compound, and (III) an external electron-donating compound, wherein in the olefin polymerization catalyst, there exist, as the internal electron-donating compound, at least one or more compounds selected from a first internal electron-donating compound and one or more compounds selected from a second internal electron-donating compound, and as the external electron-donating compound, there exists at least one or more compounds selected from an alkoxysilane compound and an aminoalkoxysilane compound.

Abstract: Provided is an olefin polymerization catalyst including: (I) as a solid catalyst component for olefin polymerization, (a) a solid catalyst component for olefin polymerization containing at least magnesium, titanium, halogen, and as an internal electron-donating compound, a succinate diester compound, and (b) a solid catalyst component for olefin polymerization containing at least magnesium, titanium, halogen, and as an internal electron-donating compound, a phthalate diester compound, (II) an organoaluminum compound, and (III) as an external electron-donating compound, at least one or more compounds selected from alkoxysilane compounds and one or more compounds selected from (alkylamino)alkylsilane compounds. According to the present invention, an olefin polymerization catalyst that can produce an olefin polymer having a high flexural modulus and a high impact resistance, and a method for producing an olefin polymer using the catalyst can be provided.

Abstract: Provided is a novel olefin polymer which is excellent in lightness and moldability, has high rigidity and yields molded products excellent in flexural elasticity. The olefin polymer includes a propylene initial polymerization product formed in the presence of an olefin polymerization catalyst which is a contact reaction product of an olefin polymerization solid catalyst component containing a titanium atom, a magnesium atom, a halogen atom and an internal electron donating compound, at least one organoaluminum compound selected from the compounds of the general formula (I), and a first external electron donating compound; and a polypropylene part formed of a propylene polymerization product formed in the presence of the olefin polymerization catalyst and a second external electron donating compound higher in adsorption to the surface of the olefin polymerization solid catalyst component than the first external electron donating compound.

Abstract: A solid catalyst component for polymerization of an olefin having a polymerization activity equivalent to or higher than a solid catalyst component having a phthalic acid ester compound or diether compound as an internal electron-donating compound, and can produce an olefin polymer having excellent bulk density and low content of olefin oligomers.

Abstract: A solid catalyst component for polymerization of an olefin having a polymerization activity equivalent to or higher than a solid catalyst component having a phthalic acid ester compound or diether compound as an internal electron-donating compound, and can produce an olefin polymer having excellent bulk density and low content of olefin oligomers.

Abstract: A method for manufacturing a solid catalyst component for polymerization of an olefin is disclosed, which includes bringing a magnesium compound and a specific styrene-based compound into contact with each other to obtain a preliminary contact product, and subsequently bringing the preliminary contact product, a titanium halide compound, and an internal electron donor compound into contact with each other to obtain a solid catalyst component for polymerization of an olefin; and a method for manufacturing a catalyst for polymerization of an olefin and a method for manufacturing a polymer of an olefin using the solid catalyst component for polymerization of an olefin obtained by the manufacturing method.

Abstract: Provided is a novel olefin polymer which is excellent in lightness and moldability, has high rigidity and yields molded products excellent in flexural elasticity. The olefin polymer includes a propylene initial polymerization product formed in the presence of an olefin polymerization catalyst which is a contact reaction product of an olefin polymerization solid catalyst component containing a titanium atom, a magnesium atom, a halogen atom and an internal electron donating compound, at least one organoaluminum compound selected from the compounds of the general formula (I), and a first external electron donating compound; and a polypropylene part formed of a propylene polymerization product formed in the presence of the olefin polymerization catalyst and a second external electron donating compound higher in adsorption to the surface of the olefin polymerization solid catalyst component than the first external electron donating compound.