公开(公告)号：US20180201788A1

公开(公告)日：2018-07-19

申请号：US15892635

申请日：2018-02-09

申请人： NIPPON SHOKUBAI CO., LTD.

发明人： Masatoshi NAKAMURA ,  Koji MIYAKE ,  Taku IWAMURA ,  Yusuke WATANABE

IPC分类号： C08L101/14

CPC分类号： C08L101/14 ,  C08L33/02 ,  C08L2312/00

摘要： A water-absorbent resin composition is provided which shows only small reduction in liquid permeability and limited coloring over time or in relation to another factor. The water-absorbent resin composition (particulate absorbent agent) of the present invention contains: a polycarboxylate-based water-absorbent resin as a primary component, the resin having a crosslinked structure formed by polymerization of an acid group-containing unsaturated monomer; and multivalent metal cations (preferably, on surfaces of particles (i.e., the water-absorbent resin composition)) wherein: the multivalent metal cations other than Fe cations account for 0.001 to 1 mass % of the water-absorbent resin; and the ratio of the Fe cations to the multivalent metal cations other than the Fe cations is less than or equal to 5.00 mass %.