The present invention relates to a method of preparing an ABS graft copolymer and a method of preparing a thermoplastic resin composition including the ABS graft copolymer. More specifically, the present invention relates to a method of preparing an ABS graft copolymer, in which a predetermined amount of a vinyl aromatic compound and a predetermined amount of a vinyl cyanide compound are grafted to a small-diameter rubber latex before enlarging particle size of the small-diameter rubber latex is performed, and then enlarging particle size of the small-diameter rubber latex is performed by adding a certain amount of a polymer coagulant, and to a method of preparing a thermoplastic resin composition including the ABS graft copolymer. According to the present invention, latex stability may be improved, and an ABS graft copolymer having excellent impact resistance may be prepared.

Disclosed are a method of preparing a resin powder and an integrated reactor for the same. When a coagulation process is performed using an acidic coagulant in the integrated coagulator for latex coagulation and aging according to the present invention, a remaining acidic coagulant is also removed from a reactor through neutralization, and thus, a resin powder having enhanced moist-heat resistance and thermal stability may be prepared.

Disclosed are a method of preparing a resin powder and an integrated reactor for the same. When a coagulation process is performed using an acidic coagulant in the integrated coagulator for latex coagulation and aging according to the present invention, a remaining acidic coagulant is also removed from a reactor through neutralization, and thus, a resin powder having enhanced moist-heat resistance and thermal stability may be prepared.

Disclosed are a method of preparing a resin powder and an integrated reactor for the same. When a coagulation process is performed using an acidic coagulant in the integrated coagulator for latex coagulation and aging according to the present invention, a remaining acidic coagulant is also removed from a reactor through neutralization, and thus, a resin powder having enhanced moist-heat resistance and thermal stability may be prepared.

A method for green synthesis of uniform- and large-particle-size polystyrene particles, comprising steps of: prepolymerizing styrene at 70 to 75 for 1 h to 6 h in advance while stirring, adding divinylbenzene dissolved with initiators to the styrene, and stirring for 10 min to 30 min to obtain oil phase; heating lactic acid or an aqueous solution of lactic acid to 70 to 80, adding the oil phase to dispersed phase by a constant-pressure device, maintaining the temperature for 2 h, heating to 805 and then maintaining the temperature for 1 h, and heating to 855 and then maintaining the temperature for 3 h to 6 h, to obtain polystyrene particles with a uniform particle size ranging from 0.7 mm to 2.0 mm.

A method for green synthesis of uniform- and large-particle-size polystyrene particles, comprising steps of: prepolymerizing styrene at 70 to 75 for 1 h to 6 h in advance while stirring, adding divinylbenzene dissolved with initiators to the styrene, and stirring for 10 min to 30 min to obtain oil phase; heating lactic acid or an aqueous solution of lactic acid to 70 to 80, adding the oil phase to dispersed phase by a constant-pressure device, maintaining the temperature for 2 h, heating to 805 and then maintaining the temperature for 1 h, and heating to 855 and then maintaining the temperature for 3 h to 6 h, to obtain polystyrene particles with a uniform particle size ranging from 0.7 mm to 2.0 mm.

A method for green synthesis of uniform- and large-particle-size polystyrene particles, comprising steps of: prepolymerizing styrene at 70 to 75 for 1 h to 6 h in advance while stirring, adding divinylbenzene dissolved with initiators to the styrene, and stirring for 10 min to 30 min to obtain oil phase; heating lactic acid or an aqueous solution of lactic acid to 70 to 80, adding the oil phase to dispersed phase by a constant-pressure device, maintaining the temperature for 2 h, heating to 805 and then maintaining the temperature for 1 h, and heating to 855 and then maintaining the temperature for 3 h to 6 h, to obtain polystyrene particles with a uniform particle size ranging from 0.7 mm to 2.0 mm.

The present invention relates to a diene-based rubber latex including a polymer aggregate and having an extra large diameter, a method for preparing same and a graft copolymer with a core-shell structure, including same and having excellent impact strength and surface properties. A diene-based rubber latex of which 14 wt % to 26 wt % has diameter of 100 nm to less than 300 nm, 62 wt % to 81 wt % has a diameter of 300 nm to less than 800 nm, and 5 wt % to 14 wt % has a diameter of 800 nm to less than 1000 nm, based on 100 wt % of total rubber particles.

The present invention relates to a diene-based rubber latex including a polymer aggregate and having an extra large diameter, a method for preparing same and a graft copolymer with a core-shell structure, including same and having excellent impact strength and surface properties. A diene-based rubber latex of which 14 wt % to 26 wt % has diameter of 100 nm to less than 300 nm, 62 wt % to 81 wt % has a diameter of 300 nm to less than 800 nm, and 5 wt % to 14 wt % has a diameter of 800 nm to less than 1000 nm, based on 100 wt % of total rubber particles.

A method for green synthesis of uniform- and large-particle-size polystyrene particles, comprising steps of: prepolymerizing styrene at 70 to 75 for 1 h to 6 h in advance while stirring, adding divinylbenzene dissolved with initiators to the styrene, and stirring for 10 min to 30 min to obtain oil phase; heating lactic acid or an aqueous solution of lactic acid to 70 to 80, adding the oil phase to dispersed phase by a constant-pressure device, maintaining the temperature for 2 h, heating to 805 and then maintaining the temperature for 1 h, and heating to 855 and then maintaining the temperature for 3 h to 6 h, to obtain polystyrene particles with a uniform particle size ranging from 0.7 mm to 2.0 mm.