	US 11,958,921 B2
	Poly (meth) acrylic acid (salt)-based particulate water-absorbing agent and production method therefor
Tsuyoshi Yorino, Himeji (JP); Daisuke Takeda, Himeji (JP); Yoshitaka Ikeuchi, Himeji (JP); Shigeru Sakamoto, Himeji (JP); Yoshihiro Shobo, Himeji (JP); Yoshifumi Adachi, Himeji (JP); Ryota Wakabayashi, Himeji (JP); Daisuke Takagi, Himeji (JP); and Sachie Kitabata, Himeji (JP)
Assigned to NIPPON SHOKUBAI CO., LTD., Osaka (JP)
Filed by NIPPON SHOKUBAI CO., LTD., Osaka (JP)
Filed on Nov. 16, 2022, as Appl. No. 17/988,581.
Application 17/988,581 is a division of application No. 15/737,884, granted, now 11,535,689, previously published as PCT/JP2016/068311, filed on Jun. 20, 2016.
Claims priority of application No. 2015-123529 (JP), filed on Jun. 19, 2015.
Prior Publication US 2023/0097487 A1, Mar. 30, 2023
Int. Cl. C08F 220/06 (2006.01); A61L 15/00 (2006.01); A61L 15/24 (2006.01); A61L 15/60 (2006.01); C08F 6/00 (2006.01); C08F 220/00 (2006.01); C08J 3/12 (2006.01); C08J 3/24 (2006.01); C08K 5/06 (2006.01); C08K 5/1535 (2006.01); C08K 5/17 (2006.01); C08K 5/19 (2006.01); C08K 5/32 (2006.01); C08K 5/42 (2006.01)

CPC C08F 220/06 (2013.01) [A61L 15/00 (2013.01); A61L 15/24 (2013.01); A61L 15/60 (2013.01); C08F 6/00 (2013.01); C08F 220/00 (2013.01); C08J 3/12 (2013.01); C08J 3/24 (2013.01); C08K 5/06 (2013.01); C08K 5/1535 (2013.01); C08K 5/17 (2013.01); C08K 5/175 (2013.01); C08K 5/19 (2013.01); C08K 5/32 (2013.01); C08K 5/42 (2013.01); C08J 2333/00 (2013.01); C08J 2333/02 (2013.01)]

5 Claims

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+380×10⁻⁹cm², and

in a case where GCA is 35.0 g/g or more,

FGBP≥30×10⁻⁹cm²;

(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.