Abstract: This invention relates to a method for producing multimodal polyolefin using multistage continuous polymerization process for producing multimodal polyolefin having superior melt-strength, moldability, mechanical strength, processability, and appearance. A method for producing multimodal polyolefin using multistage polymerization process, comprising the steps of: polymerizing a high molecular weight bimodal polymer by introducing a monomer in the presence of a catalyst composition including two or more different catalysts in a first reactor; and continuously introducing the high molecular weight bimodal polymer produced in the first reactor into a second reactor, and polymerizing a low molecular weight bimodal polymer by introducing a monomer in the presence of the catalyst composition, wherein the multimodal polyolefin includes the high molecular weight bimodal polymer and the low molecular weight bimodal polymer at the same time.

Abstract: The present invention relates to a novel metallocene catalyst compound for the production of a polyolefin resin having a high molecular weight and a wide molecular weight distribution or a method of preparing the same, and more particularly to a metallocene catalyst compound using a ligand containing a Group 15 or 16 element having a bulky substituent or a method of preparing the same. The present invention provides a novel metallocene catalyst compound represented by Chemical Formula 1 below.

Abstract: This invention relates to a method for producing multimodal polyolefin using multistage continuous polymerization process for producing multimodal polyolefin having superior melt-strength, moldability, mechanical strength, processability, and appearance. A method for producing multimodal polyolefin using multistage polymerization process, comprising the steps of: polymerizing a high molecular weight bimodal polymer by introducing a monomer in the presence of a catalyst composition including two or more different catalysts in a first reactor; and continuously introducing the high molecular weight bimodal polymer produced in the first reactor into a second reactor, and polymerizing a low molecular weight bimodal polymer by introducing a monomer in the presence of the catalyst composition, wherein the multimodal polyolefin includes the high molecular weight bimodal polymer and the low molecular weight bimodal polymer at the same time.

Abstract: The present invention relates to a novel metallocene catalyst compound for the production of a polyolefin resin having a high molecular weight and a wide molecular weight distribution or a method of preparing the same, and more particularly to a metallocene catalyst compound using a ligand containing a Group 15 or 16 element having a bulky substituent or a method of preparing the same. The present invention provides a novel metallocene catalyst compound represented by Chemical Formula 1 below.

Abstract: Multimodal polyolefin resins for manufacturing films, pipes, hollow molded articles having high melt strength and excellent formability, mechanical strength, processability and appearance are described. The resins have: density is 0.930-0.960 g/cm3; melt flow index is 0.01-10.0 g/10 minutes; ratio Mw/Mn is 10-60; and two or more peaks appear when molecular weight is measured by GPC. In molded pipe, the Mw of polymer collected at position B is 0.1% greater than Mw of polymer collected at position A; polymer having Mw of 10,000 or less among polymers collected at position A is 0.1% greater than the amount of polymer having Mw of 10,000 or less among polymers collected at position B; and the amount of polymer having Mw of 1,000,000 or more among polymers collected at position B is 0.1% greater than the amount of polymer having Mw of 1,000,000 or more among polymers collected at position A.

Abstract: Multimodal polyolefin resins for manufacturing films, pipes, hollow molded articles having high melt strength and excellent formability, mechanical strength, processability and appearance are described. The resins have: density is 0.930-0.960 g/cm3; melt flow index is 0.01-10.0 g/10 minutes; ratio Mw/Mn is 10-60; and two or more peaks appear when molecular weight is measured by GPC. In molded pipe, the Mw of polymer collected at position B is 0.1% greater than Mw of polymer collected at position A; polymer having Mw of 10,000 or less among polymers collected at position A is 0.1% greater than the amount of polymer having Mw of 10,000 or less among polymers collected at position B; and the amount of polymer having Mw of 1,000,000 or more among polymers collected at position B is 0.1% greater than the amount of polymer having Mw of 1,000,000 or more among polymers collected at position A.

Abstract: Multimodal polyolefin resin having excellent characteristics such as moldability, mechanical strength, external appearance and a polyolefin resin molded product are disclosed. The polyolefin resin satisfies all requirements of following (1) to (5), (1) density (d): 0.934 to 0.963 g/cm3, (2) melt flow index (MIE, 190° C., 2.16 kg load condition): 0.01 to 1.0 g/10 minutes, (3) ratio of weight-average molecular weight (Mw) and number-average molecular weight (Mn) measured by Gel Permeation Chromatography (GPC) (Mw/Mn, Molecular weight distribution (MWD)): 12 to 60, (4) at least two peaks appear when the molecular weight of the polyolefin resin is measured with GPC, and (5) amount of polyolefin having Mw of 10,000 or less exceeds 15 weight % and amount of polyolefin having Mw of 1,000,000 or more exceeds 1.5 weight %, when the molecular weight of the polyolefin resin is measured with GPC.

Abstract: Multimodal polyolefin resin having superior characteristics including moldability, mechanical strength, external appearance, melt strength and a polyolefin resin molded product meeting the requirements: (1) polymerized in the presence of at least two different metallocene compounds as catalysts; (2) matrix index of 2 or less and a melt strength of 4.0 Force (cN) or greater at 190° C.; (3) melt flow index (MIP, 190° C., 5.0 kg load condition) of 0.01 to 5.0 g/10 min; (4) ratio (Mw/Mn, MWD) of weight average molecular weight (Mw) to number average molecular weight (Mn) of 5-35 as measured by gel permeation chromatography; and (5) bimodal or multimodal peaks in a weight average molecular weight distribution measured by gel permeation chromatography, wherein the height ratio of two peaks (the ratio of the height of low molecular weight peak to the height of high molecular weight peak) is 0.7-3.

Abstract: Multimodal polyolefin resin having superior characteristics including moldability, mechanical strength, external appearance, melt strength and a polyolefin resin molded product meeting the requirements: (1) polymerized in the presence of at least two different metallocene compounds as catalysts; (2) matrix index of 2 or less and a melt strength of 4.0 Force (cN) or greater at 190° C.; (3) melt flow index (MIP, 190° C., 5.0 kg load condition) of 0.01 to 5.0 g/10 min; (4) ratio (Mw/Mn, MWD) of weight average molecular weight (Mw) to number average molecular weight (Mn) of 5-35 as measured by gel permeation chromatography; and (5) bimodal or multimodal peaks in a weight average molecular weight distribution measured by gel permeation chromatography, wherein the height ratio of two peaks (the ratio of the height of low molecular weight peak to the height of high molecular weight peak) is 0.7-3.

Abstract: A metallocene catalyst composition for preparing multimodal polyolefin resin which has superior moldability, mechanical strength, appearance and so on, and a polymerization method using the same are disclosed. The catalyst composition comprises (i) at least one first metallocene compound represented by Formula 1 in the description part: (ii) at least one second metallocene compound represented by Formula 2 in the description of the Specification: and a co-catalyst.

Abstract: A metallocene catalyst composition for preparing multimodal polyolefin resin which has superior moldability, mechanical strength, appearance and so on, and a polymerization method using the same are disclosed. The catalyst composition comprises (i) at least one first metallocene compound represented by Formula 1 in the description part: (ii) at least one second metallocene compound represented by Formula 2 in the description of the Specification: and a co-catalyst.

Abstract: Multimodal polyolefin resin having excellent characteristics such as moldability, mechanical strength, external appearance and a polyolefin resin molded product are disclosed. The polyolefin resin satisfies all requirements of following (1) to (5), (1) density (d): 0.934 to 0.963 g/cm3, (2) melt flow index (MIE, 190° C., 2.16 kg load condition): 0.01 to 1.0 g/10 minutes, (3) ratio of weight-average molecular weight (Mw) and number-average molecular weight (Mn) measured by Gel Permeation Chromatography (GPC) (Mw/Mn, Molecular weight distribution (MWD)): 12 to 60, (4) at least two peaks appear when the molecular weight of the polyolefin resin is measured with GPC, and (5) amount of polyolefin having Mw of 10,000 or less exceeds 15 weight % and amount of polyolefin having Mw of 1,000,000 or more exceeds 1.5 weight %, when the molecular weight of the polyolefin resin is measured with GPC.