PROBLEM TO BE SOLVED: To provide a water-absorbing resin particle that can effectively prevent the cracking or deforming of an absorber after urination.SOLUTION: A water-absorbing resin particle contains: a polymer (A) having a water-soluble vinyl monomer (a1) and/or a vinyl monomer (a2) to turn into the water-soluble vinyl monomer (a1) by hydrolysis as an essential constitutional unit and a polyvalent metal salt (B) having three or more polyvalent metal atoms, with a content of the polyvalent metal salt (B) of 0.5-20 wt.% based on the weight of the water-absorbing resin particle.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】排尿後の吸収体のひび割れや変形を抑止する効果に優れた吸水性樹脂粒子を提供する。【解決手段】水溶性ビニルモノマー(a1)及び/又は加水分解により水溶性ビニルモノマー(a1)となるビニルモノマー(a2)を必須構成単位とする重合体(A)と、多価金属原子を3個以上含む多価金属塩(B)とを含む吸水性樹脂粒子であり、多価金属塩(B)を吸水性樹脂粒子の重量に基づいて0.5~20重量%含む吸水性樹脂粒子。【選択図】 なし
