Abstract: The purpose of the invention is to provide an ethylene-?-olefin copolymer, which has a high melt tension but a small neck-in, and a molded object produced by extrusion molding of the copolymer. An ethylene-?-olefin copolymer having a monomer unit based on ethylene and a monomer unit based on an ?-olefin having 3 to 20 carbon atoms, which has a melt flow rate (MFR) of 0.1 to 100 g/10 min, a density (d) of 850 to 940 kg/m3, a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of 2 to 12, and a value g* defined by the following formula (I) of 0.50 to 0.75: g*=[?]/([?]GPC×gSCB*)??(I).

Abstract: A production process of a pre-polymerized catalyst component, comprising steps of (i) contacting a transition metal compound defined by formula [1], an activation agent, an organometallic compound defined by formula [2], and an optional organoaluminum compound with one another, thereby forming a primary polymerization catalyst, and (ii) pre-polymerizing an olefin in the presence of the primary polymerization catalyst; and a process for producing an addition polymer, comprising a step of polymerizing an addition polymerizable monomer in the presence of a pre-polymerized catalyst component produced by the above production process, or in the presence of the pre-polymerized catalyst component and an organoaluminum compound.

Abstract: A production process of a pre-polymerized catalyst component, comprising steps of (i) contacting a transition metal compound defined by formula [1], an activation agent, an organometallic compound defined by formula [2], and an optional organoaluminum compound with one another, thereby forming a primary polymerization catalyst, and (ii) pre-polymerizing an olefin in the presence of the primary polymerization catalyst; and a process for producing an addition polymer, comprising a step of polymerizing an addition polymerizable monomer in the presence of a pre-polymerized catalyst component produced by the above production process, or in the presence of the pre-polymerized catalyst component and an organoaluminum compound.

Abstract: The purpose of the invention is to provide an ethylene-?-olefin copolymer, which has a high melt tension but a small neck-in, and a molded object produced by extrusion molding of the copolymer. An ethylene-?-olefin copolymer having a monomer unit based on ethylene and a monomer unit based on an ?-olefin having 3 to 20 carbon atoms, which has a melt flow rate (MFR) of 0.1 to 100 g/10 min, a density (d) of 850 to 940 kg/m3, a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of 2 to 12, and a value g* defined by the following formula (I) of 0.50 to 0.75: g*=[?]/([?]GPC×gSCB*)??(I).

Abstract: A production process of a polymerization catalyst component includes contacting compound (a) such as diethyl zinc represented by the defined formula [1], a compound (b) such as pentafluorophenol, represented by the defined formula [2], a compound (c) such as water, represented by the defined formula [3], and particles (d), such as silica, with one another in a hydrocarbon solvent under an agitator power of 0.05 kW/m3 or greater.

Abstract: A production process of a polymerization catalyst component includes contacting compound (a) such as diethyl zinc represented by the defined formula [1], a compound (b) such as pentafluorophenol, represented by the defined formula [2], a compound (c) such as water, represented by the defined formula [3], and particles (d), such as silica, with one another in a hydrocarbon solvent under an agitator power of 0.05 kW/m3 or greater.

Abstract: A process for producing a modified particle, which involves the step of contacting with one another compounds (a), (b) and (c) represented by the defined general formulas M1L1m, R1t-1TH and H2O, respectively, and a particle (d), in which M1 is a metal atom of Group 1, 2, 12, 14 or 15 of the periodic table, m is a valence of M1, L1 is a hydrogen atom, a halogen atom or a hydrocarbon group, which may be the same or different when plural L1's exist, R1 is an electron-withdrawing group or an electron-withdrawing group-containing group, which may be the same or different when plural R1's exist, T is a non-metal atom of Group 15 or 16 of the periodic table, and t is a valence of T; and a particle (d), wherein the compound (a) to (c) and the particle (d) are contacted in defined orders and in defined solvents; a carrier comprising said modified particle; a catalyst component for addition polymerization comprising said modified particle; a catalyst for addition polymerization using said catalyst component; and a proc

Abstract: A production process of a polymerization catalyst component includes contacting compound (a) such as diethyl zinc represented by the defined formula [1], a compound (b) such as pentafluorophenol, represented by the defined formula [2], a compound (c) such as water, represented by the defined formula [3], and particles (d), such as silica, with one another in a hydrocarbon solvent under an agitator power of 0.05 kW/m3 or greater.

Abstract: A process for producing a homogeneous type solid catalyst component or a homogeneous type solid catalyst comprising a step for removing a fine-powdery component and/or a shapeless component utilizing a difference between their sedimentation velocities of the catalyst component or the catalyst in a solvent.

Abstract: A modified particle obtained by contacting the following (a), the following (b), the following (c) and a particle (d) with one another,

Abstract: A process for producing a homogeneous type solid catalyst component or a homogeneous type solid catalyst comprising a step for removing a fine-powdery component and/or a shapeless component utilizing a difference between their sedimentation velocities of the catalyst component or the catalyst in a solvent.