申请人:Nippon Soda Co., Ltd.
公开号:EP2559715A1
公开(公告)日:2013-02-20
The present invention provides a novel copolymer useful as a dispersing agent for a pigment or the like. The novel copolymer contains a block chain (A) consisting of a polymer comprising at least one repeating unit selected from the group consisting of a repeating unit having a tertiary amino group and a repeating unit having a quaternary ammonium base; and a block chain (B) consisting of a copolymer comprising a repeating unit having a polyoxyalkylene chain and a repeating unit having an acidic group. The at least one repeating unit selected from the group consisting of a repeating unit having a tertiary amino group and a repeating unit having a quaternary ammonium base is, for example, a repeating unit represented by the following formula (II), and the repeating unit having a polyoxyalkylene chain is, for example, a repeating unit represented by the following formula (III):
本发明提供了一种新型共聚物,可用作颜料或类似物质的分散剂。该新型共聚物包含嵌段链 (A),嵌段链由聚合物组成,聚合物包含至少一个重复单元,该重复单元选自由具有叔氨基的重复单元和具有季铵盐基的重复单元组成的组;以及嵌段链 (B),嵌段链由共聚物组成,共聚物包含具有聚氧亚烷基链的重复单元和具有酸性基团的重复单元。从具有叔氨基的重复单元和具有季铵基的重复单元组成的组中选出的至少一个重复单元例如是下式(II)表示的重复单元,而具有聚氧亚烷基链的重复单元例如是下式(III)表示的重复单元: