Abstract: According to the invention, a single or plural kinds of bridged metallocene compounds having differing cyclopentadienyl-derived groups afford macromonomers that are a source of long-chain branches and simultaneously catalyze the repolymerization of the macromonomers into olefin polymers having a large number of long-chain branches, small neck-in in the T-die extrusion, small take-up surge and superior mechanical strength. The olefin polymerization catalysts and the polymerization processes can efficiently produce the olefin polymers.

Abstract: Metallocene compounds of the invention are useful as olefin polymerization catalysts or catalyst components. Olefin polymerization processes of the invention involve an olefin polymerization catalyst containing the metallocene compound. In detail, the olefin polymerization catalysts can catalyze with high polymerization activity the production of olefin polymers having high melt tension, excellent mechanical strength and good particle properties, and the olefin polymerization processes involve the catalysts. Ethylene polymers according to the invention are obtained by the polymerization processes and have higher processability and easy-opening properties and particularly excellent mechanical strength compared to conventional ethylene polymers. Thermoplastic resin compositions of the invention contain the ethylene polymers.

Abstract: The invention provides a method for preventing fouling in chemical equipment, comprising adding an antifouling agent which comprises a polyoxyalkylene polymer having Mn of 30,000 or less to a component in the chemical equipment.

Abstract: The present invention provides a film including, in at least a part thereof, a layer comprising an ethylene-based resin, which is a copolymer of ethylene and an ?-olefin of 4 to 10 carbon atoms, and satisfies the following requirements (1) to (5) at the same time or an ethylene-based resin composition containing the resin; (I) the melt flow rate at 190° C. under a load of 2.16 kg is in the range of 0.1 to 50 g/10 min, (II) the density is in the range of 875 to 970 kg/m3, (III) the ratio of a melt tension at 190° C. to a shear viscosity at 200° C. and an angular velocity of 1.0 rad/sec is in the range of 1.00×10?4 to 9.00×10?4, (IV) the sum of the number of methyl branches and the number of ethyl branches, each number being based on 1000 carbon atoms and measured by 13C-NMR, is not more than 1.8, and (V) the zero shear viscosity [?0(P)] at 200° C. and the weight-average molecular weight (Mw) as measured by a GPC-viscosity detector method (GPC-VISCO) satisfy the following relational formula (Eq-1): 0.

Abstract: The invention provides a method for preventing fouling in chemical equipment, comprising adding an antifouling agent which comprises a polyoxyalkylene polymer having Mn of 30,000 or less to a component in the chemical equipment.

Abstract: Ethylene-based resin, which exhibits a satisfactorily high melt tension and can provide a molded object excellent in mechanical strength, the ethylene-based resin characterized in simultaneously satisfying the requirements [1] to [5] described below: [1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C. is in the range of 0.1 to 100 g/10 minutes; [2] density (d) is in the range of 875 to 970 kg/m3; [3] ratio [MT/?*(g/P)] of melt tension [MT(g)] at 190° C. to shearing viscosity [?*(P)] at 200° C. at an angular velocity of 1.0 rad/sec. is in the range of 1.50×10?4 to 9.00×10?4; [4] sum [(A+B)(/1000C)] of the number of methyl branches [A(/1000C)] and the number of ethyl branches [B(/1000C)] per 1000 carbon atoms measured by 13C-NMR is 1.8 or less; and [5] zero shear viscosity [?0(P)] at 200° C. and weight-average molecular weight (Mw) measured by GPC-viscosity detector method (GPC-VISCO) satisfy the following relational expression (Eq-1): 0.01×10?13×Mw3.4??0?4.5×10?13×Mw3.4??(Eq-1).

Abstract: Metallocene compounds of the invention are useful as olefin polymerization catalysts or catalyst components. Olefin polymerization processes of the invention involve an olefin polymerization catalyst containing the metallocene compound. In detail, the olefin polymerization catalysts can catalyze with high polymerization activity the production of olefin polymers having high melt tension, excellent mechanical strength and good particle properties, and the olefin polymerization processes involve the catalysts. Ethylene polymers according to the invention are obtained by the polymerization processes and have higher processability and easy-opening properties and particularly excellent mechanical strength compared to conventional ethylene polymers. Thermoplastic resin compositions of the invention contain the ethylene polymers.

Abstract: The present invention provides a film including, in at least a part thereof, a layer comprising an ethylene-based resin, which is a copolymer of ethylene and an ?-olefin of 4 to 10 carbon atoms, and satisfies the following requirements (1) to (5) at the same time or an ethylene-based resin composition containing the resin; (I) the melt flow rate at 190° C. under a load of 2.16 kg is in the range of 0.1 to 50 g/10 min, (II) the density is in the range of 875 to 970 kg/m3, (III) the ratio of a melt tension at 190° C. to a shear viscosity at 200° C. and an angular velocity of 1.0 rad/sec is in the range of 1.00×10?4 to 9.00×10?4, (IV) the sum of the number of methyl branches and the number of ethyl branches, each number being based on 1000 carbon atoms and measured by 13C-NMR, is not more than 1.8, and (V) the zero shear viscosity [?0(P)] at 200° C. and the weight-average molecular weight (Mw) as measured by a GPC-viscosity detector method (GPC-VISCO) satisfy the following relational formula (Eq-1): 0.

Abstract: Ethylene-based copolymer microparticles and functional group-containing ethylene-based copolymer microparticles that have particle diameter smaller than that of conventional polyethylene fine-particles, no inter-particle agglomeration, very narrow particle size distribution, and high sphericity are provided, in which requirements (A) to (E): (A) The intrinsic viscosity [?] measured in decalin at 135° C. is in the range of 0.1 to 50 dl/g, (B) at least 95 wt % or more of particles pass through a mesh screen with an opening of 37 ?m, (C) the median diameter (d50) measured by laser diffraction scattering is 3 ?m?d50?25 ?m, (D) the circularity coefficient is 0.85 or more, and (E) the variation coefficient of particle diameter (Cv) is 20% or less. Non-agglomerated spherical magnesium-containing microparticles used as magnesium-containing carrier component for olefin-polymerization catalysts that can manufacture the above microparticles are also provided.

Abstract: Solid fine particles which contain a magnesium atom, an aluminum atom and a C1-20 alkoxy group simultaneously, are insoluble in a hydrocarbon solvent, and have an average particle diameter of 3 to 80 ?m, and an olefin polymerization catalyst containing the solid fine particles and a transition metal compound in the groups 3 to 11 in the periodic table, exhibit a very high olefin polymerization activity without combination with an expensive organoaluminum oxy compound or organoboron compound and maintains a high activity in polymerization for a long time, and an olefin polymer excellent in powdery properties can be produced by using the olefin polymerization catalyst. The transition metal compound in the groups 3 to 11 in the periodic table includes a transition metal compound having a ligand containing two or more atoms selected from a boron atom, a nitrogen atom, an oxygen atom, a phosphorus atom and a sulfur atom.

Abstract: Ethylene-based resin, which exhibits a satisfactorily high melt tension and can provide a molded object excellent in mechanical strength, the ethylene-based resin characterized in simultaneously satisfying the requirements [1] to [5] described below: [1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C. is in the range of 0.1 to 100 g/10 minutes; [2] density (d) is in the range of 875 to 970 kg/m3; [3] ratio [MT/?*(g/P)] of melt tension [MT(g)] at 190° C. to shearing viscosity [?*(P)] at 200° C. at an angular velocity of 1.0 rad/sec. is in the range of 1.50×10?4 to 9.00×10?4; [4] sum [(A+B)(/1000C)] of the number of methyl branches [A(/1000C)] and the number of ethyl branches [B(/1000C)] per 1000 carbon atoms measured by 13C-NMR is 1.8 or less; and [5] zero shear viscosity [?0(P)] at 200° C. and weight-average molecular weight (Mw) measured by GPC-viscosity detector method (GPC-VISCO) satisfy the following relational expression (Eq-1): 0.01×?13×Mw3.4??0?4.5×10?13×Mw3.

Abstract: Ethylene-based copolymer microparticles and functional group-containing ethylene-based copolymer microparticles that have particle diameter smaller than that of conventional polyethylene fine-particles, no inter-particle agglomeration, very narrow particle size distribution, and high sphericity are provided, in which requirements (A) to (E): (A) The intrinsic viscosity [?] measured in decalin at 135° C. is in the range of 0.1 to 50 dl/g, (B) at least 95 wt % or more of particles pass through a mesh screen with an opening of 37 ?m, (C) the median diameter (d50) measured by laser diffraction scattering is 3 ?m?d50?25 ?m, (D) the circularity coefficient is 0.85 or more, and (E) the variation coefficient of particle diameter (Cv) is 20% or less. Non-agglomerated spherical magnesium-containing microparticles used as magnesium-containing carrier component for olefin-polymerization catalysts that can manufacture the above microparticles are also provided.

Abstract: Solid fine particles which contain a magnesium atom, an aluminum atom and a C1-20 alkoxy group simultaneously, are insoluble in a hydrocarbon solvent, and have an average particle diameter of 3 to 80 ?m, and an olefin polymerization catalyst containing the solid fine particles and a transition metal compound in the groups 3 to 11 in the periodic table, exhibit a very high olefin polymerization activity without combination with an expensive organoaluminum oxy compound or organoboron compound and maintains a high activity in polymerization for a long time, and an olefin polymer excellent in powdery properties can be produced by using the olefin polymerization catalyst. The transition metal compound in the groups 3 to 11 in the periodic table includes a transition metal compound having a ligand containing two or more atoms selected from a boron atom, a nitrogen atom, an oxygen atom, a phosphorus atom and a sulfur atom.

Abstract: Solid fine particles which contain a magnesium atom, an aluminum atom and a C1-20 alkoxy group simultaneously, are insoluble in a hydrocarbon solvent, and have an average particle diameter of 3 to 80 ?m, and an olefin polymerization catalyst containing the solid fine particles and a transition metal compound in the groups 3 to 11 in the periodic table, exhibit a very high olefin polymerization activity without combination with an expensive organoaluminum oxy compound or organoboron compound and maintains a high activity in polymerization for a long time, and an olefin polymer excellent in powdery properties can be produced by using the olefin polymerization catalyst. The transition metal compound in the groups 3 to 11 in the periodic table includes a transition metal compound having a ligand containing two or more atoms selected from a boron atom, a nitrogen atom, an oxygen atom, a phosphorus atom and a sulfur atom.

Abstract: An ethylene-based polymer which is an ethylene/C4 to C10 ?-olefin copolymer and satisfies the following requirements [k1] to [k3]: [k1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C. is in the range of 1.0 to 50 g/10 minutes; [k2] LNR defined as a scale of neck-in upon film molding is in the range of 0.6 to 1.4; and [k3] take-up speed at break [DS (m/min)] at 160° C. and melt flow rate (MFR) satisfy the following relationship (Eq-1): 12×MFR0.577?DS?165×MFR0.577 (Eq-1), and a thermoplastic resin composition containing the ethylene-based polymer, provide a molded product, preferably a film, excellent in moldability and mechanical strength.

Abstract: Solid fine particles which contain a magnesium atom, an aluminum atom and a C1-20 alkoxy group simultaneously, are insoluble in a hydrocarbon solvent, and have an average particle diameter of 3 to 80 ?m, and an olefin polymerization catalyst containing the solid fine particles and a transition metal compound in the groups 3 to 11 in the periodic table, exhibit a very high olefin polymerization activity without combination with an expensive organoaluminum oxy compound or organoboron compound and maintains a high activity in polymerization for a long time, and an olefin polymer excellent in powdery properties can be produced by using the olefin polymerization catalyst. The transition metal compound in the groups 3 to 11 in the periodic table includes a transition metal compound having a ligand containing two or more atoms selected from a boron atom, a nitrogen atom, an oxygen atom, a phosphorus atom and a sulfur atom.

Abstract: An ethylene-based polymer which is an ethylene/C4 to C10 ?-olefin copolymer and satisfies the following requirements [k1] to [k3]: [k1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C. is in the range of 1.0 to 50 g/10 minutes; [k2] LNR defined as a scale of neck-in upon film molding is in the range of 0.6 to 1.4; and [k3] take-up speed at break [DS (m/min)] at 160° C. and melt flow rate (MFR) satisfy the following relationship (Eq-1): 12×MFR0.577?DS?165×MFR0.577 (Eq-1), and a thermoplastic resin composition containing the ethylene-based polymer, provide a molded product, preferably a film, excellent in moldability and mechanical strength.