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US 12,246,303 B2Granted
Water-absorbing resin particles and absorbent article
AssigneeSumitomo Seika Chemicals Co., Ltd.
InventorTakashi Ito
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Abstract
Water-absorbing resin particles, in which a light transmittance at a wavelength of 425 nm when the water-absorbing resin particles are swollen 30 times with a physiological saline solution is 20% or more, are disclosed.
Claims10
Water-absorbing resin particles comprising:
- a crosslinked polymer having a monomer unit derived from an ethylenically unsaturated monomer comprising at least one compound selected from the group consisting of (meth)acrylic acid and a salt thereof,
- wherein a proportion of a (meth)acrylic acid and a salt thereof is 70 to 100 mol % with respect to a total amount of monomers in the crosslinked polymer,
- a light transmittance at a wavelength of 425 nm when the water-absorbing resin particles are swollen 30 times with a physiological saline solution is 20% or more, and
- a water retention capacity for the physiological saline solution is 30 to 55 g/g.
1 more element
Dependencies are inferred from the claim text.