Patent ID: 11958921
Assignee: NIPPON SHOKUBAI CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 0:
1. A poly(meth)acrylic acid (salt)-based particulate water-absorbing agent comprising poly(meth)acrylic acid (salt)-based water-absorbing resin particles as a main component, the poly(meth)acrylic acid (salt)-based particulate water-absorbing agent satisfying the following (1) to (5):
(1) an absorption capacity without pressure (CRC) is 28 g/g or more;
(2) GCA is 28.0 g/g or more;
(3) a relation between FGBP and GCA satisfies,
in a case where GCA is in a range of 28.0 g/g or more and less than 35.0 g/g,
FGBP≥−10×10−9×GCA+380×10−9 cm2, and
in a case where GCA is 35.0 g/g or more,
FGBP≥30×10−9 cm2;
(4) a weight average particle diameter (D50) of the particulate water-absorbing agent is 300 μm to 500 μm; and
(5) a surface tension is 60 mN/m or more.