Back to results
US 2022/0015957 A1Published application
Water-absorbent resin particles, absorber, and absorbent article
AssigneeSumitomo Seika Chemicals Co., Ltd.
InventorMoe NISHIDA
Life of this patent
Estimating the term…
Abstract
An absorbent article 100 includes an absorber 10, the absorber 10 contains water-absorbent resin particles 10a, and a standard deviation between a water retention amount of 0.01% by mass sodium salt aqueous solution, a water retention amount of 0.01% by mass potassium salt aqueous solution, a water retention amount of 0.01% by mass magnesium salt aqueous solution, and a water retention amount of 0.01% by mass calcium salt aqueous solution in the water-absorbent resin particles 10a is 20 g/g or less.
Claims20
Water-absorbent resin particles comprising:
- a crosslinking polymer comprising a structural unit derived from an ethylenically unsaturated monomer,
- wherein the ethylenically unsaturated monomer comprises at least one compound selected from the group consisting of (meth)acrylic acid and a salt thereof,
- a ratio of the (meth)acrylic acid and the salt thereof is 70 to 100 mol % with respect to a total amount of monomers for obtaining the water-absorbent resin particles, and
- a standard deviation between a water retention amount of 0.01% by mass sodium salt aqueous solution, a water retention amount of 0.01% by mass potassium salt aqueous solution, a water retention amount of 0.01% by mass magnesium salt aqueous solution, and a water retention amount of 0.01% by mass calcium salt aqueous solution is 20 g/g or less.
1 more element
Dependencies are inferred from the claim text.