Abstract: The present invention relates to a weather-resistant thermoplastic resin, a thermoplastic resin composition containing the same, and a method of preparing the thermoplastic resin composition. More particular, the present invention relates to a thermoplastic resin including a) a hard core having a refractive index of 1.530 to 1.590; b) a crosslinked rubber layer that surrounds the hard core, has an average thickness of 30 to 80 nm, and is prepared by polymerizing an alkyl (meth)acrylate compound and a crosslinking agent; and c) a non-crosslinked hard shell that surrounds the crosslinked rubber layer and is prepared by polymerizing an aromatic vinyl compound and a vinyl cyanide compound, a thermoplastic resin composition including the thermoplastic resin, and a method of preparing the thermoplastic resin composition.

Abstract: Disclosed are an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer which is prepared using a polyalkylene cross-linking agent such as polyethylene glycol diacrylate or polyethylene glycol dimethacrylate for a core of the alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer and thus advantageously improves low-temperature impact strength of resins when the copolymer is applied to a polycarbonate resin composition, and the polycarbonate resin composition comprising the copolymer.

Abstract: Disclosed are an anionic polymerization initiator, which is an organo-alkali metal compound having an anionic end including an amine group, a method of preparing a modified conjugated diene-based polymer using the same, and a rubber composition including the modified conjugated diene-based polymer prepared thereby. Specifically the polydiene and the anionic initiator contain a group of Chemical Formula 8, below, in Chemical Formula 8, R1 and R2 are each independently a C1-C20 alkyl group, R3 is a C1-C10 alkylene group, R4 and R5 each independently a C1-C10 alkyl group, R1 and R2 are linked with each other to form a ring structure, and * represents a bonding position.

Abstract: The present invention relates to an acrylate-styrene-acrylonitrile polymer, a method for preparing the same, and a thermoplastic resin composition. More specifically, the present invention has an effect of providing an acrylate-styrene-acrylonitrile polymer, a method for preparing the same, and a thermoplastic resin composition, wherein an N-vinyl monomer is applied such that the polymerization can be initiated by a redox system under conditions in which a grafting agent is not used, thereby improving the grafting efficiency of the acrylate-styrene-acrylonitrile polymer and thus improving powder characteristics and impact resistance while maintaining dye-ability; the content of free shells is lowered to improve the coagulation and latex stability; the polymerization is performed by the redox system without an activation liquid of a shell layer, thereby reducing additives and thus improving pigment dye-ability and significantly improving weather resistance.

Abstract: The present invention relates to a method for preparing a sialic acid derivative characterized by performing both of a process for preparing CMP-N-acetylneuraminic acid using N-acetyl-D-glucosamine and a process for preparing the sialic acid (neuraminic acid) derivative that combines a sialic acid with a galactose derivative or a lactose derivative, together, in one reactor. According to the method for preparing a sialic acid derivative of the present invention, expensive cytidine 5?-monophosphate (CMP) is capable of being recycled in a reactor, such that an amount of the CMP introduced into the reactor may be reduced, and the sialic acid derivative is capable of being prepared at a significantly high efficiency by using cheap N-acetyl-D-glucosamine, and pyruvate as substrates.

Abstract: Disclosed are a modified conjugated diene polymer and a method for preparing the same. The modified conjugated diene polymer and the method for preparing the same advantageously provide superior compatibility with an inorganic filler, heat generation, tensile strength and abrasion resistance, low fuel consumption and excellent resistance on wet roads.

Abstract: Disclosed are a modified conjugated diene polymer and a method for preparing the same. The modified conjugated diene polymer and the method for preparing the same advantageously provide superior compatibility with an inorganic filler, heat generation, tensile strength and abrasion resistance, low fuel consumption and excellent resistance on wet roads.

Abstract: Disclosed are an anionic polymerization initiator, which is an organo-alkali metal compound having an anionic end including an amine group, a method of preparing a modified conjugated diene-based polymer using the same, and a rubber composition including the modified conjugated diene-based polymer prepared thereby.

Abstract: Disclosed are an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer which is prepared using a polyalkylene cross-linking agent such as polyethylene glycol diacrylate or polyethylene glycol dimethacrylate for a core of the alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound copolymer and thus advantageously improves low-temperature impact strength of resins when the copolymer is applied to a polycarbonate resin composition, and the polycarbonate resin composition comprising the copolymer.

Abstract: Disclosed are an ASA graft copolymer having a structure including a seed which comprises at least one compound of an aromatic vinyl compound, a vinyl cyan compound and an alkyl (meth)acrylate compound, a core which surrounds the seed and comprises alkyl acrylate, and a shell which surrounds the core, comprises an aromatic vinyl compound, a vinyl cyan compound and a crosslinking agent, and having suitably controlled thicknesses and refractive indexes of the respective layers, and an ASA graft copolymer composition comprising the ASA graft copolymer.

Abstract: Disclosed is a modified conjugated diene polymer represented by Formula 1. Advantageously, provided are a modified conjugated diene polymer which exhibits superior compatibility with a reinforcing filler, heat generation, tensile strength and abrasion resistance, low fuel consumption and excellent wet skid resistance, a method for preparing the same and a rubber composition comprising the same.

Abstract: Disclosed is a modified conjugated diene polymer represented by Formula 1. Advantageously, provided are a modified conjugated diene polymer which exhibits superior compatibility with a reinforcing filler, heat generation, tensile strength and abrasion resistance, low fuel consumption and excellent wet skid resistance, a method for preparing the same and a rubber composition comprising the same.

Abstract: The present invention relates to an acrylate-styrene-acrylonitrile polymer, a method for preparing the same, and a thermoplastic resin composition. More specifically, the present invention has an effect of providing an acrylate-styrene-acrylonitrile polymer, a method for preparing the same, and a thermoplastic resin composition, wherein an N-vinyl monomer is applied such that the polymerization can be initiated by a redox system under conditions in which a grafting agent is not used, thereby improving the grafting efficiency of the acrylate-styrene-acrylonitrile polymer and thus improving powder characteristics and impact resistance while maintaining dye-ability; the content of free shells is lowered to improve the coagulation and latex stability; the polymerization is performed by the redox system without an activation liquid of a shell layer, thereby reducing additives and thus improving pigment dye-ability and significantly improving weather resistance.

Abstract: Disclosed are an acrylonitrile-acrylate-styrene graft copolymer having a structure including a seed which comprises at least one of an aromatic vinyl compound, a vinyl cyanide compound and an alkyl (meth)acrylate compound, a core which surrounds the seed and comprises alkyl acrylate, and a shell which surrounds the core and comprises at least one of an aromatic vinyl compound, a vinyl cyanide compound and an alkyl (meth)acrylate compound, and having suitably controlled thicknesses and refractive indexes of the respective layers, and a thermoplastic resin composition comprising the acrylonitrile-acrylate-styrene graft copolymer.

Abstract: The present invention relates to a method for preparing a sialic acid derivative characterized by performing both of a process for preparing CMP-N-acetylneuraminic acid using N-acetyl-D-glucosamine and a process for preparing the sialic acid (neuraminic acid) derivative that combines a sialic acid with a galactose derivative or a lactose derivative, together, in one reactor. According to the method for preparing a sialic acid derivative of the present invention, expensive cytidine 5?-monophosphate (CMP) is capable of being recycled in a reactor, such that an amount of the CMP introduced into the reactor may be reduced, and the sialic acid derivative is capable of being prepared at a significantly high efficiency by using cheap N-acetyl-D-glucosamine, and pyruvate as substrates.

Abstract: Disclosed are a modified conjugated diene polymer and a method for preparing the same. Provided are advantageously a modified conjugated diene polymer and a method for preparing the same which provide superior compatibility with an inorganic filler, heat generation, tensile strength and abrasion resistance, low fuel consumption and excellent resistance on wet roads.

Abstract: The present disclosure relates to a polymerization initiator and a modified conjugated diene polymer prepared using the same, and more particularly to a polymerization initiator which is a compound represented by the following formula 1, and a modified conjugated diene polymer prepared using the same: wherein R1 to R5 are each independently hydrogen or a C1-10 alkylgroup or its carbanion; n? represents the number of negative charges of the carbanion and is 1? to 5?; M is a metal; and n is equal to the number of carbanions in R1 to R5.

Abstract: Disclosed are a modified conjugated diene polymer and a method for preparing the same. Provided are advantageously a modified conjugated diene polymer and a method for preparing the same which provide superior compatibility with an inorganic filler, heat generation, tensile strength and abrasion resistance, low fuel consumption and excellent resistance on wet roads.

Abstract: Disclosed are a method for continuously preparing a modified conjugated diene polymer, a polymer obtained by the method and a rubber composition comprising the same. Advantageously, provided is a method for continuously preparing a modified conjugated diene polymer which has a high molecular weight and exhibits superior processability due to control of molecular weight distribution (polydispersity).

Abstract: Disclosed are a modified conjugated diene polymer and a method for preparing the same. Provided are advantageously a modified conjugated diene polymer and a method for preparing the same which provide superior compatibility with an inorganic filler, heat generation, tensile strength and abrasion resistance, low fuel consumption and excellent resistance on wet roads.