Loading patent…
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsShohjiroh Tanase, Takehiro Tsuda, Tsuyoshi Ota, Hideo Funabashi
Estimating the term…
The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity in producing the polymers, to an olefin polymerization catalyst comprising the compound, and to a method for producing such olefin polymers. The olefin polymerization catalyst comprises (A) a solid catalyst component prepared by contacting a magnesium compound having a specific particle size distribution index (P), a titanium compound and an electron donor compound with each other, (B) an organometallic compound, and (C) an electron donor. The olefin polymerization method comprises polymerizing an olefin in the presence of the catalyst to give olefin polymers.
A magnesium compound obtained by reacting a metal magnesium, an alcohol, and at least 0.0001 gram atoms, in terms of the halogen atom relative to one gram atom of magnesium, of a halogen and/or a halogen-containing compound, at 30 to 60° C.
A solid magnesium compound substantially comprising a magnesium alkoxide, of which the particle size distribution index (P) represented by the following formula (I-1) is smaller than 4.0, P<4.0:
A magnesium compound obtained by reacting a metal magnesium, an alcohol, and at least 0.0005 gram atoms, in terms of the halogen atom relative to one gram mol of magnesium, of a halogen and/or a halogen-containing compound, in the presence of a saturated hydrocarbon compound.
A solid magnesium compound substantially comprising a magnesium alkoxide, of which the particle size distribution index (P) represented by the following formula (II-1) is smaller than 4.0, P<4.0:
Dependencies are inferred from the claim text.