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.

A thermoplastic resin composition containing 25 to 50 parts by mass of a rubber-containing graft copolymer (A) obtained by copolymerizing a monomer mixture containing an aromatic vinyl compound and a vinyl cyanide compound in the presence of a diene-based rubber-like polymer, and 50 to 75 parts by mass of a hard copolymer mixture (B) containing a hard copolymer (B-I) and a hard copolymer (B-II).

The present invention relates to a polymer coagulant including methacrylamide in a preferred range and an enlarged graft copolymer prepared using same. The polymer coagulant provided in the present invention may enlarge a conjugated diene-based polymer to a suitable particle diameter range, and there are advantages of achieving excellent impact resistance and flowability of a graft copolymer prepared from the polymer.

The present invention relates to a polymer coagulant including methacrylamide in a preferred range and an enlarged graft copolymer prepared using same. The polymer coagulant provided in the present invention may enlarge a conjugated diene-based polymer to a suitable particle diameter range, and there are advantages of achieving excellent impact resistance and flowability of a graft copolymer prepared from the polymer.

The present invention relates to a polymer coagulant including methacrylamide in a preferred range and an enlarged graft copolymer prepared using same. The polymer coagulant provided in the present invention may enlarge a conjugated diene-based polymer to a suitable particle diameter range, and there are advantages of achieving excellent impact resistance and flowability of a graft copolymer prepared from the polymer.

A thermoplastic resin composition according to the present invention comprises: about 100 parts by weight of a thermoplastic resin comprising about 30 to about 60 wt % of a rubber-modified aromatic vinyl-based copolymer resin, about 30 to about 60 wt % of a polycarbonate resin, and about 5 to about 25 wt % of a polyester resin; about 0.1 to about 5 parts by weight of zinc oxide; about 0.1 to about 3 parts by weight of a phosphite compound comprising at least one type from among a phosphite compound represented by chemical formula 1 and a phosphite compound represented by chemical formula 2; and about 5 to about 30 parts by weight of a phosphorus-based flame retardant. The thermoplastic resin composition has excellent hydrolysis resistance, flame retardancy, and impact resistance, excellent balance of the foregoing physical properties, and the like.

A thermoplastic resin composition according to the present invention comprises: about 100 parts by weight of a thermoplastic resin comprising about 30 to about 60 wt % of a rubber-modified aromatic vinyl-based copolymer resin, about 30 to about 60 wt % of a polycarbonate resin, and about 5 to about 25 wt % of a polyester resin; about 0.1 to about 5 parts by weight of zinc oxide; about 0.1 to about 3 parts by weight of a phosphite compound comprising at least one type from among a phosphite compound represented by chemical formula 1 and a phosphite compound represented by chemical formula 2; and about 5 to about 30 parts by weight of a phosphorus-based flame retardant. The thermoplastic resin composition has excellent hydrolysis resistance, flame retardancy, and impact resistance, excellent balance of the foregoing physical properties, and the like.

A thermoplastic resin composition including polycarbonate and ABS resin having superior impact resistance, chemical resistance, flowability, and color phase, and a molded article thereof is provided. A thermoplastic resin composition includes maleimide based copolymer (A) including aromatic vinyl monomer unit, vinyl cyanide monomer unit, and maleimide monomer unit; polycarbonate (B); and at least one resin (C) selected from the group including ABS resin, ASA resin, AES resin, and SAN resin; wherein: the maleimide monomer unit is contained by 0.5 to 10 mass % and the polycarbonate (B) is contained by 20 to 70 mass % in 100 mass % of the thermoplastic resin composition.

A thermoplastic resin composition including polycarbonate and ABS resin having superior impact resistance, chemical resistance, flowability, and color phase, and a molded article thereof is provided. A thermoplastic resin composition includes maleimide based copolymer (A) including aromatic vinyl monomer unit, vinyl cyanide monomer unit, and maleimide monomer unit; polycarbonate (B); and at least one resin (C) selected from the group including ABS resin, ASA resin, AES resin, and SAN resin; wherein: the maleimide monomer unit is contained by 0.5 to 10 mass % and the polycarbonate (B) is contained by 20 to 70 mass % in 100 mass % of the thermoplastic resin composition.

A styrene-based thermoplastic resin composition includes: (A) a graft copolymer obtained by graft-polymerizing, in the presence of a conjugated-diene-based rubber, (a) a monomer mixture containing at least an aromatic vinyl-based monomer, a methacrylic acid ester-based monomer, and an acrylic acid ester-based monomer; and (B) a vinyl-based copolymer obtained by copolymerizing (b) a monomer mixture containing an aromatic vinyl-based monomer, a methacrylic acid ester-based monomer, and a vinyl cyanide-based monomer, and containing substantial no acrylic acid ester-based monomer.