申请人:NIPPON SHOKUBAI CO., LTD.
公开号:EP0841350A1
公开(公告)日:1998-05-13
A carboxylic acid polymer containing a carboxylic group and having at least one kind of bond selected from the group consisting of an amino bond, an ether bond, and a thioether bond in a side chain is prepared by polymerizing a monomer component containing a carboxylic acid monomer represented by General Formula (3):
where Y4 is a hydrogen atom, an allyl group, or a -(CHR4)c-W2-(CHR5)d-COOR6 group, each of R1, R2, R3, R4, R5, and R6, independent of the others, is either a hydrogen atom or an alkyl group of a carbon number from 1 to 6, each of W1 and W2, independent of the other, is either an -NH- group, an -S- group, or an -O- group, and each of a, b, c, and d, independent of the others, is an integer from 0 to 6. The carboxylic acid polymer has a superior metal-scavenging ability (chelating ability) and can be suitably used, for example, as a chelating agent.
通过聚合含有通式(3)代表的羧酸单体的单体组分,制备出一种侧链中含有羧基并具有至少一种选自氨基键、醚键和硫醚键的键的羧酸聚合物:
其中 Y4 是氢原子、烯丙基或-(CHR4)c-W2-(CHR5)d-COOR6 基团,R1、R2、R3、R4、R5 和 R6 中的每一个(与其它基团无关)是氢原子或碳原子数为 1 至 6 的烷基、W1和W2各自独立地为-NH-基团、-S-基团或-O-基团,a、b、c和d各自独立地为0至6的整数。羧酸聚合物具有优异的金属清除能力(螯合能力),可适当用作螯合剂等。