Abstract: A positive electrode active material includes a lithium composite transition metal oxide in the form of a single particle. The lithium composite transition metal oxide includes Al, Y, and Zr. The method for preparing the positive electrode active material is also provided. Additionally, a positive electrode and a lithium secondary battery including the same are also provided.

Abstract: A secondary battery binder composition includes: emulsion polymer particles A having a core-shell structure, which includes a core part and a shell part occupying a part or all of the surface of the core part; and emulsion polymer particles B having no core-shell structure. The binder composition satisfies 50<N(A)/N(B)<400, wherein N(A) is the number of emulsion polymer particles A having a core-shell structure, and N(B) is the number of emulsion polymer particles B having no core-shell structure.

Abstract: Provided are a hybrid metallocene catalyst comprising a first transition metal compound represented by Formula 1; and a second transition metal compound represented by Formula 2, which is useful in the preparation of a polyethylene exhibiting a high dart drop impact strength property along with excellent processability, and a method of preparing the polyethylene using the same: wherein Formulas 1 and 2 are described herein.

Abstract: Provided are a biodegradable composition and a biodegradable film, each comprising polybutylene adipate terephthalate_(PBAT), a thermoplastic starch, and polybutylene adipate terephthalate (PBAT) grafted with starch maleate.

Abstract: Provided is a polymer composition applicable as a latex stabilizer of a latex composition for dip molding, a method for preparing the same, a latex composition for dip molding, including the same to have improved latex stability, and a molded article molded therefrom to have improved wearability and tensile properties.

Abstract: The present disclosure relates to an absorbent body and a hygiene article exhibiting excellent shape retention even after moisture absorption, which can contribute to thinning the absorbent body and hygiene article by properly fixing the super absorbent polymer particles within the absorbent body and hygiene article without using pulp.

Abstract: The present invention relates to a method for preparing a conjugated diene-based polymer, characterized in using a dimer acid saponified material as an emulsifier in a polymerization initiation step and injecting a monomer and the emulsifier in three or more installments after initiating polymerization, and the conjugated diene-based polymer prepared by the preparation method of the present invention has excellent physical properties such as impact strength and reflection haze.

Abstract: The present application relates to a decorative member including a color developing layer including a light reflective layer and a light absorbing layer provided on the light reflective layer; and a substrate provided on one surface of the color developing layer, wherein the light absorbing layer includes a copper oxide (CuaOx).

Abstract: The present specification relates to a carbazole derivative of Chemical Formula 1, a coating composition including the carbazole derivative, an organic light emitting device using the same and a method for manufacturing the same.

Abstract: A copolymer is prepared by graft-polymerizing 20 to 40% of an aromatic vinyl compound and 1 to 20% of a vinyl cyanide compound onto 50 to 70% of conjugated diene rubber latex having a solids content of 30 to 65% by weight, coagulating the latex by adding 0.04 to 0.27 parts by weight of a first nonionic polymer coagulant, and 0.47 to 1.65 parts by weight of a second cationic polymer coagulant or 0.73 to 3.35 parts by weight of a second anionic polymer coagulant to 100 parts by weight (based on solids) of the prepared graft copolymer latex. When the second coagulant is the cationic polymer coagulant, the total weight of coagulant is 0.7 to 1.7 parts by weight, and when the second coagulant is the anionic polymer coagulant, the total weight of coagulant is 0.97 to 3.37 parts by weight.

Abstract: The present disclosure relates to a diester-based material production unit including a reaction device in which an esterification reaction of dicarboxylic acid and a primary alcohol is performed, a column in which the gas-liquid separation of the primary alcohol and the water introduced is performed, a heat exchanger installed on a gas phase line of the column to remove heat of the gas phase line, a flash drum in which separation of a liquid phase and a gas phase is performed in the mixture stream including the primary alcohol and the water, a condenser installed on the flash drum upper line, and a layer separator in which the layer separation of a mixture of a liquefied primary alcohol and water into an organic layer and an aqueous layer is performed, wherein one or more lines through which recirculated primary alcohol from the flash drum and the layer separator flows are connected to an upper portion of the column.

Abstract: The present invention relates to a method of preparing a polymer, which includes: adding a first reaction solution including an aqueous solvent and a monomer mixture including an alkyl-substituted aromatic vinyl-based monomer, an alkyl-unsubstituted aromatic vinyl-based monomer, and a vinyl cyanide-based monomer to a reactor and initiating polymerization; and performing polymerization by continuously adding an alkyl-substituted aromatic vinyl-based monomer to the reactor, wherein the first reaction solution satisfies Expression 1 (see the description of the invention).

Abstract: Provided are a catalyst for methane reformation and a method for manufacturing the same, wherein the catalyst includes a porous metal support; a primary coating layer provided on the porous metal support; and a secondary coating layer provided on the primary coating layer, wherein the primary coating layer includes a perovskite-based compound having a coefficient of thermal expansion of 65% or greater compared to a coefficient of thermal expansion of the porous metal support, the secondary coating layer includes a perovskite-based catalyst particle and a perovskite-based binder, and the perovskite-based catalyst particle and the perovskite-based binder each independently include a compound represented by Chemical Formula 1, Sr1-xAxTi1-yByO3-???[Chemical Formula 1] wherein all the variables are described herein.

Abstract: A method for preparing a super absorbent polymer, includes: feeding a composition containing a water-soluble ethylenically unsaturated monomer having an acidic group of which at least a part is neutralized, an internal crosslinking agent, and a polymerization initiator to a polymerization reactor and subjecting the composition to a polymerization reaction to obtain a hydrous gel polymer; drying the hydrous gel polymer to obtain a dried substance; hydrating the dried substance to adsorb moisture to the dried substance; and pulverizing the hydrated dried substance to obtain a super absorbent polymer. The method reduces an amount of fine particles generated in the pulverization step, thereby increasing a yield of the super absorbent polymer.

Abstract: A compound represented by the following Chemical Formula 1 and an organic light emitting device including the same are described: wherein, X, R1 to R3 and n1 are described herein.

Abstract: Provided are a hybrid metallocene catalyst comprising a first transition metal compound represented by Formula 1; and a second transition metal compound represented by Formula 2, which is useful in the preparation of a polyethylene having excellent impact strength and haze properties, and a method of preparing the polyethylene using the same: wherein Formulas 1 and 2 are described herein.

Abstract: The present disclosure relates to a preparation method for an absorbent body exhibiting excellent shape retention even after moisture absorption, which can contribute to thinning the absorbent body by properly fixing the super absorbent polymer particles within the absorbent body without using pulp and can improve the filling rate by uniformly applying a super absorbent polymer.

Abstract: A method for continuously preparing a catalyst composition for preparing a catalyst composition having improved catalyst activity by pre-treating a hydrogen-bonded lanthanide rare earth element compound and/or an oligomer type of a lanthanide rare earth element compound of Formula 1, which induce the deterioration of the catalyst activity, and a method for preparing a conjugated diene-based polymer using the catalyst composition prepared thereby are described, wherein all the variables are described herein.

Abstract: A multi-block copolymer and a method for preparing the same which are capable of providing a resin composition with excellent compatibility and high impact strength due to a chain structure close to symmetry are described herein.

Abstract: Provided are a modifier represented by Formula 1, which is useful for modifying a conjugated diene-based polymer, has excellent affinity with a filler and improves the compounding properties of the conjugated diene-based polymer, a modified conjugated diene-based polymer comprising a functional group derived from the modifier, and a method for preparing the modified conjugated diene-based polymer, wherein all the variables are described herein.