The present invention relates to a method for producing an ethylene-based copolymer, and more particularly, to a method for producing an ethylene-based copolymer capable of increasing process efficiency by preventing plugging and corrosion of a facility. The method for producing an ethylene-based copolymer includes a producing mode and a washing mode of which one is selectively performed. The producing mode includes: a) hyper-compressing primary compressed ethylene, and a mixture including a carboxylic acid-containing comonomer and a polar solvent to produce a compressed material; b) reacting the compressed material to produce a reaction product including an ethylene-based copolymer; and c) separating and recovering unreacted residues from the reaction product and introducing the unreacted residues into the mixture of step a). The washing mode includes: re-supplying the compressed material produced in step a) to step a) as a mixture, without performing step b).

Films having high light transmission values, low haze and high glass transition temperatures and useful, for example, as optical protection films and zero-zero optical retardation films, are prepared using one or more copolymers of methyl methacrylate having certain characteristics.

Films having high light transmission values, low haze and high glass transition temperatures and useful, for example, as optical protection films and zero-zero optical retardation films, are prepared using one or more copolymers of methyl methacrylate having certain characteristics.

Acid-functionalized copolymers of methyl methacrylate having relatively high glass transition temperatures and molecular weights may be employed to manufacture articles having high light transmission values, low haze, high heat resistance, and high environmental stability, which are useful as optical protection films, zero-zero optical retardation films, and compensation films as well as lighting pipes and optical imaging lenses.

Acid-functionalized copolymers of methyl methacrylate having relatively high glass transition temperatures and molecular weights may be employed to manufacture articles having high light transmission values, low haze, high heat resistance, and high environmental stability, which are useful as optical protection films, zero-zero optical retardation films, and compensation films as well as lighting pipes and optical imaging lenses.

Provided is a surface-treated carbon nanotube having few surface fractures, not reducing the molecular weight of the resin to be mixed and having excellent extrudability. In the surface-treated carbon nanotube, the thermal reduction amount at 600 C. in a nitrogen atmosphere is 0.2 to 40%, the surface oxygen concentration measured by X-ray photoelectron spectroscopy (XPS) is 1.5 to 40 atm % and the surface sulfur concentration is less than 0.1 atm %.

Provided is a surface-treated carbon nanotube having few surface fractures, not reducing the molecular weight of the resin to be mixed and having excellent extrudability. In the surface-treated carbon nanotube, the thermal reduction amount at 600 C. in a nitrogen atmosphere is 0.2 to 40%, the surface oxygen concentration measured by X-ray photoelectron spectroscopy (XPS) is 1.5 to 40 atm % and the surface sulfur concentration is less than 0.1 atm %.

The present invention relates to an aqueous composition with enhanced stability for hard surface applications containing at least one lipophilic compound and at least one copolymer, in which the at least one copolymer is a comb-type branched copolymer exhibiting an alternating sequence of monomeric units (a) having at least one hydrophilic group and monomeric units (b) having at least one lipophilic side chain. Moreover, a method for producing said composition as well as the use of the composition is concerned.

The present invention relates to an aqueous composition with enhanced stability for hard surface applications containing at least one lipophilic compound and at least one copolymer, in which the at least one copolymer is a comb-type branched copolymer exhibiting an alternating sequence of monomeric units (a) having at least one hydrophilic group and monomeric units (b) having at least one lipophilic side chain. Moreover, a method for producing said composition as well as the use of the composition is concerned.

An object of the present invention is to provide a PC/ABS-based thermoplastic resin composition and a molded article thereof excellent in impact resistance. A thermoplastic resin composition comprising: a polycarbonate (A); at least one resin (B) selected from the group consisting of an ABS resin, an ASA resin, an AES resin and a SAN resin; an unsaturated dicarboxylic acid anhydride-based copolymer (C); and an additive (D), wherein the additive (D) has a function promoting hydrolysis of polycarbonate, and with a content of (C) is 2 to 25 parts by mass.