Disclosed are an acrylic acid-based polymer which is a star polymer containing a repeating unit derived from an (α-lower alkyl)acrylic ester represented by formula (I):
(wherein R1 represents a hydrogen atom or a lower alkyl group, and R2 represents an organic group having a polar group) in an arm portion; an acrylic acid-based polymer containing a repeating unit derived from an poly(α-lower alkyl)acrylic ester and a repeating unit derived from an (α-lower alkyl)acrylic ester represented by formula (I), and a method for producing a polymer through living polymerization, comprising forming an oligomer having a polymerization active end, which is an oligomer higher than an average 1.0-mer and lower than an average 4.0-mer or an average 4.0-mer, and polymerizing using the oligomer having a polymerization active end as an initiating species.
本发明公开了一种
丙烯酸基聚合物,它是一种星型聚合物,含有由式(I)表示的(α-低级烷基)
丙烯酸酯衍生的重复单元:
(其中 R1 代表氢原子或低级烷基,R2 代表具有极性基团的有机基团)的臂部分;一种
丙烯酸基聚合物,其含有衍生自聚(α-低级烷基)
丙烯酸酯的重复单元和衍生自式(I)代表的(α-低级烷基)
丙烯酸酯的重复单元,以及一种通过活聚合生产聚合物的方法,包括形成具有聚合活性端的低聚物,该低聚物是高于平均 1.0-mer 和低于平均 4.0-mer 或平均 4.0-mer 的低聚物,并使用具有聚合活性端的低聚物作为引发物进行聚合。