PROCESS FOR PREPARING A GRAFT POLYMER

The present invention relates to a method for preparing a graft polymer, comprising: preparing a second diene-based rubber polymer by enlarging a first diene-based rubber polymer with an acidic group-containing acrylic polymer; preparing a first mixture comprising the second diene-based rubber polymer and a nonionic emulsifier; and preparing a graft polymer latex by polymerizing an aromatic vinyl-based monomer and a vinyl cyanide-based monomer in the presence of the first mixture. 本发明涉及一种制备接枝聚合物的方法，其包括：通过用含酸性基团的丙烯酸类聚合物扩大第一二烯类橡胶聚合物来制备第二二烯类橡胶聚合物；制备包含所述第二二烯类橡胶聚合物和非离子乳化剂的第一混合物；以及通过在所述第一混合物的存在下使芳香族乙烯基类单体和乙烯基氰化物类单体聚合来制备接枝聚合物胶乳。