Method of preparing ASA graft copolymer, method of preparing thermoplastic ASA resin composition including the same, and method of preparing ASA molded part

摘要

The present invention relates to a method of preparing an ASA graft copolymer, a method of preparing a thermoplastic ASA resin composition including the same, and a method of preparing an ASA molded part, and more particularly, to a method of preparing a multilayered ASA graft copolymer including a step of preparing seeds, cores, and shells. According to the method, since a multifunctional carboxylic acid having 20 or more carbon atoms or a salt thereof is introduced as an emulsifier, the content of the emulsifier remaining in a resin may be reduced, thereby providing an ASA resin having excellent thermal stability and appearance characteristics while the inherent physical properties thereof, such as impact resistance and weather resistance, are maintained.