Abstract: Provided is a novel tetraarylborate compound, a catalyst composition including the same, and a method for preparing an ethylene homopolymer or an ethylene-?-olefin copolymer using the same. Specifically, the teraarylborate compound having excellent thermal stability, able to be completely dissolved in an aliphatic hydrocarbon-based solvent to facilitate the operation of commercial processes and effectively inducing the activation of a single active site catalyst, may be used as a catalyst activator to provide an ethylene-based copolymer selected from a high molecular weight ethylene homopolymer and ethylene-?-olefin copolymer having high catalyst activity.

Abstract: Provided are a method of purifying an alpha-olefin and a composition for purifying an alpha-olefin therefor. More specifically, a method of purifying an alpha-olefin having an excellent effect of removing impurities in the alpha-olefin and a composition for purifying an alpha-olefin therefor are provided.

Abstract: Provided are an ethylene polymer mixture, a method of preparing the same, and a molded article using the same. More specifically, an ethylene polymer mixture in which two ethylene polymers having different densities are mixed, a method of preparing the same, and a molded article having a low haze and a low heat sealing temperature using the ethylene polymer mixture, are provided.

Abstract: Provided are a metal-ligand complex, a catalyst composition for ethylene-based polymerization including the same, and a method for preparing an ethylene-based polymer using the same. Since the metal-ligand complex of the present invention in which a certain functional group is introduced to a certain position has high solubility and catalytic activity, the catalyst composition comprising the same for ethylene-based polymerization including the same may produce an ethylene-based polymer having excellent physical properties.

Abstract: Provided are a novel transition metal compound based on a cyclopenta[a]naphthalene group, a transition metal catalyst composition having high catalytic activity for preparing an ethylene homopolymer or a copolymer of ethylene and at least one ?-olefin including the same, a method for preparing an ethylene homopolymer or a copolymer of ethylene and ?-olefin using the same, and the ethylene homopolymer or the copolymer of ethylene and ?-olefin prepared above. The metallocene compound according to the present invention and the catalyst composition including the same may provide a high thermal stability of the catalyst to maintain high catalytic activity even at a high temperature, have good copolymerization reactivity with other olefins, and prepare a high molecular weight polymer at a high yield.

Abstract: Provided are a novel indene-based transition metal complex, a transition metal catalyst composition including the same having high catalyst activity for preparing an ethylene homopolymer or copolymers of ethylene and one or more ?-olefins, a method for preparing an ethylene homopolymer or copolymers of ethylene and ?-olefins using the same, and the thus-prepared ethylene homopolymer or copolymers of ethylene and ?-olefins.

Abstract: The present invention relates to a new transition metal compound based on cyclopenta[b]fluorenyl group, a transition metal catalyst composition containing the same and having high catalytic activity for preparing an ethylene homopolymer or a copolymer of ethylene and one ?-olefin, a method of preparing an ethylene homopolymer or a copolymer of ethylene and ?-olefin using the same, and the prepared ethylene homopolymer or the copolymer of ethylene and ?-olefin.

Abstract: The present invention relates to a new transition metal compound based on cyclopenta[b]fluorenyl group, a transition metal catalyst composition containing the same and having high catalytic activity for preparing an ethylene homopolymer or a copolymer of ethylene and one ?-olefin, a method of preparing an ethylene homopolymer or a copolymer of ethylene and ?-olefin using the same, and the prepared ethylene homopolymer or the copolymer of ethylene and ?-olefin.

Abstract: Provided are a novel transition metal compound, a transition metal catalyst composition for preparing an ethylene homopolymer or a copolymer of ethylene and ?-olefin, containing the same, a method for preparing an ethylene homopolymer or a copolymer of ethylene and ?-olefin using the same, and an ethylene homopolymer or a copolymer of ethylene and ?-olefin prepared using the same.

Abstract: The present invention relates to a new transition metal compound based on cyclopenta[b]fluorenyl group, a transition metal catalyst composition containing the same and having high catalytic activity for preparing an ethylene homopolymer or a copolymer of ethylene and one ?-olefin, a method of preparing an ethylene homopolymer or a copolymer of ethylene and ?-olefin using the same, and the prepared ethylene homopolymer or the copolymer of ethylene and ?-olefin.

Abstract: Provided is an ethylene copolymer having improved hygienic property. More particularly, the ethylene copolymer satisfies a correlation between a density thereof and an extract content. The ethylene copolymer having improved hygienic property can be applied in injection molding, rotation molding, or blow molding.