Abstract: A separator for an electrochemical device, including a porous polymer substrate and an inorganic coating layer formed on at least one surface of the porous polymer substrate. The inorganic coating layer includes inorganic particles and a binder resin. The binder resin includes a polyvinylidene fluoride (PVdF)-based polymer having a main chain, and at least one hydrogen atom in the main chain of the PVdF-based polymer is substituted with an acrylic compound-derived functional group.

Abstract: The present disclosure relates to a separator for a lithium secondary battery comprising a porous substrate, and a porous coating layer disposed on at least one surface of the porous substrate and comprising inorganic particles and binder polymer, wherein the binder polymer is terpolymer including 65 to 90 weight % of a repeat unit derived from vinylidenefluoride (VDF), 1 to 28 weight % of a repeat unit derived from hexafluoropropylene (HFP) and 5 to 28 weight % of a repeat unit derived from chlorotrifluoroethylene (CTFE), and the separator has adhesiveness towards electrode ranging from 30 gf/25 mm to 150 gf/25 mm and machine direction (MD) thermal shrinkage of 1 to 18% and transverse direction (TD) thermal shrinkage of 1 to 17%, and a lithium secondary battery comprising the same, wherein the separator has uniform micropores on the surface, and thus has the increased adhesive surface area with electrode and consequential improved adhesiveness towards electrode.

Abstract: An apparatus for estimating a vehicle weight includes a memory storing computer-executable instructions and at least one processor that accesses the memory and executes the instructions. The at least one processor applies a real velocity and real acceleration to a trained real-to-virtual transformation model to obtain a virtual output set at a target time point, which includes a virtual gradient of a vehicle, a virtual velocity of the vehicle, and virtual longitudinal acceleration of the vehicle, and applies the virtual output set at the target time point and a real wheel torque at the target time point to a trained mass estimation model to obtain weight information of the vehicle. The real-to-virtual transformation model includes a first sub-model for obtaining an initial virtual velocity, a second sub-model for obtaining the virtual longitudinal acceleration, and a third sub-model for obtaining the virtual gradient.

Abstract: Provided is a hybrid catalyst composition including a first transition metal compound represented by Formula 1 and a second transition metal compound represented by Formula 2, the compounds being different from each other in the Formulae. The hybrid catalyst composition including the first and second transition metal compounds may exhibit high catalytic activity and may prepare a polyolefin having processability and mechanical properties.

Abstract: The present invention relates to a hybrid supported metallocene catalyst including at least first metallocene compound, at least one second metallocene compound, at least one cocatalyst compound, and a carrier, a preparation method therefor, and a polyolefin resin polymerized in the presence of the catalyst, wherein the second metallocene compound is a compound of a bridged structure having a ligand of an asymmetric structure, and the polyolefin resin has a density of 0.910 g/cm3 to 0.960 g/cm3, a molecular weight density in a unimodal distribution of 3 to 5, a melt index of 0.05 to 100 at 2.16 kg, and a melt flow rate of 20 to 40.

Abstract: The present invention relates to a high-density ethylene-based polymer comprising an ethylene homopolymer or a copolymer of ethylene and at least one comonomer selected from the group consisting of an ?-olefin, a cyclic olefin, and a straight, branched and cyclic diene. According to the present invention, the high-density polyethylene resin has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer of the present invention has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

Abstract: A high-density ethylene-based polymer is provided. The high-density ethylene-based polymer contains an ethylene homopolymer or a copolymer of ethylene and at least one comonomer selected from the group consisting of an ?-olefin, a cyclic olefin, and a straight, branched and cyclic diene. The high-density polyethylene resin has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

Abstract: The invention relates to: a hybrid supported metallocene catalyst includes at least one first metallocene compound among the compounds represented by chemical formula 1, at least one second metallocene compound among the compounds represented by chemical formula 2 and a cocatalyst compound; a method for preparing an ethylene-?-olefin copolymer, comprising polymerizing olefin monomers in the presence thereof; and an ethylene-?-olefin copolymer having improved melt strength.

Abstract: The present invention relates to a high-density ethylene-based polymer comprising: an ethylene homopolymer; or a copolymer of ethylene and at least one comonomer selected from the group consisting of ?-olefins, cyclic olefins and linear, branched and cyclic dienes. According to the present invention, the high-density ethylene-based polymer has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer of the present invention has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

Abstract: Provided are an ethylene-based polymer having excellent long-term pressure resistance characteristics and a pipe using the ethylene-based polymer. The ethylene-based polymer satisfies the balance of mechanical characteristics and excellent molding processability, as compared with a conventional ethylene-based polymer. Also provided are an ethylene-based polymer having a wide molecular weight distribution and a small lamellar thickness, thereby increasing tie molecules and obtaining excellent long-term pressure resistance characteristics, and a pipe using the same.

Abstract: A preparation method for a metallocene compound is provided. The method includes: stirring at least one compound I among compounds expressed by the following chemical formula (I) and a hydrogenation reaction catalyst of 0.10 to 0.55 parts by weight based on 100 parts by weight of the compound I under a hydrogen atmosphere; and obtaining a metallocene compound containing at least one first compound among the compounds expressed by the following chemical formula (1). Chemical formula (I) and (1) are provided in the specification.

Abstract: The present invention relates to a hybrid supported metallocene catalyst including at least first metallocene compound, at least one second metallocene compound, at least one cocatalyst compound, and a carrier, a preparation method therefor, and a polyolefin resin polymerized in the presence of the catalyst, wherein the second metallocene compound is a compound of a bridged structure having a ligand of an asymmetric structure, and the polyolefin resin has a density of 0.910 g/cm3 to 0.960 g/cm3, a molecular weight density in a unimodal distribution of 3 to 5, a melt index of 0.05 to 100 at 2.16 kg, and a melt flow rate of 20 to 40.

Abstract: A high-density ethylene-based polymer is provided. The high-density ethylene-based polymer contains an ethylene homopolymer or a copolymer of ethylene and at least one comonomer selected from the group consisting of an ?-olefin, a cyclic olefin, and a straight, branched and cyclic diene. The high-density polyethylene resin has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

Abstract: The present invention relates to a high-density ethylene-based polymer comprising an ethylene homopolymer or a copolymer of ethylene and at least one comonomer selected from the group consisting of an ?-olefin, a cyclic olefin, and a straight, branched and cyclic diene. According to the present invention, the high-density polyethylene resin has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer of the present invention has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

Abstract: Provided is a hybrid catalyst composition including a first transition metal compound represented by Formula 1 and a second transition metal compound represented by Formula 2, the compounds being different from each other in the Formulae. The hybrid catalyst composition including the first and second transition metal compounds may exhibit high catalytic activity and may prepare a polyolefin having processability and mechanical properties.

Abstract: The present invention relates to a high-density ethylene-based polymer comprising: an ethylene homopolymer; or a copolymer of ethylene and at least one comonomer selected from the group consisting of ?-olefins, cyclic olefins and linear, branched and cyclic dienes. According to the present invention, the high-density ethylene-based polymer has a wide molecular weight distribution and excellent comonomer distribution characteristics, has excellent melt flowability due to a long chain branched structure, and has excellent mechanical characteristics since the comonomer distribution is concentrated in a high-molecular-weight body. The high-density ethylene polymer of the present invention has excellent molding processability during processing such as extrusion, compression, injection and rotational molding by having excellent mechanical characteristics and melt flowability.

Abstract: The invention relates to: a hybrid supported metallocene catalyst includes at least one first metallocene compound among the compounds represented by chemical formula 1, at least one second metallocene compound among the compounds represented by chemical formula 2 and a cocatalyst compound; a method for preparing an ethylene-?-olefin copolymer, comprising polymerizing olefin monomers in the presence thereof; and an ethylene-?-olefin copolymer having improved melt strength.

Abstract: A preparation method for a metallocene compound is provided. The method includes: stirring at least one compound I among compounds expressed by the following chemical formula (I) and a hydrogenation reaction catalyst of 0.10 to 0.55 parts by weight based on 100 parts by weight of the compound I under a hydrogen atmosphere; and obtaining a metallocene compound containing at least one first compound among the compounds expressed by the following chemical formula (1). Chemical formula (I) and (1) are provided in the specification.

Abstract: The present invention relates to a metallocene catalyst system comprising an antistatic agent and a preparation method for polyolefin using the same. The present invention can not only maintain the inherent activity of the catalyst but also minimize reactor fouling and particle agglomeration in the preparation of a polyolefin using the gas-phase polymerization process, thereby allowing to the process to be operational with more stability.

Abstract: The present invention relates to a method for preparing a polyethylene wax, comprising the step of polymerizing ethylene monomers using a metallocene catalyst in a loop reactor, and more particularly, to a method for polymerizing a polyethylene wax using a metallocene catalyst and a double loop reactor. According to the present invention, a polyethylene wax having a uniform and narrow molecular weight distribution can be polymerized with high activity.