PROBLEM TO BE SOLVED: To provide a water-absorbing resin particle whose liquid permeability is improved while absorption retention and water absorption speed are maintained, and to provide a production method thereof and an absorptive article using the same.SOLUTION: [1] A modified water-absorbing resin particle obtained by conducting polymerization of a nitrogen-containing water-soluble unsaturated monomer containing no acid group (B) in the presence of a crosslinked polymer-containing water-absorbing resin particle (A), 0.1 to 10 mass% of the nitrogen-containing water-soluble unsaturated monomer containing no acid group (B) with respect to the water-absorbing resin particle (A) in a dry state, and a water-soluble radical polymerization initiator (C), and [2] a method for producing the modified water-absorbing resin particle by conducting polymerization of the nitrogen-containing water-soluble unsaturated monomer containing no acid group (B) in the presence of the crosslinked polymer-containing water-absorbing resin particle (A), 0.1 to 10 mass% of the nitrogen-containing water-soluble unsaturated monomer containing no acid group (B) with respect to the water-absorbing resin particle (A) in a dry state, and the water-soluble radical polymerization initiator (C), and [3] an absorptive article including the modified water-absorbing resin particle described in [1] as a constituent member, are disclosed.COPYRIGHT: (C)2014,JPO&INPIT【課題】吸収保持量及び吸水速度を維持したまま、通液性を高めた吸水性樹脂粒子、その製造方法及びこれを用いた吸収性物品を提供する。【解決手段】[1]架橋ポリマーを含有する吸水性樹脂粒子(A)、乾燥状態の前記吸水性樹脂粒子(A)に対して0.1~10質量%の、酸基を含有しない含窒素水溶性不飽和単量体(B)、及び水溶性ラジカル重合開始剤(C)の存在下で、前記酸基を含有しない含窒素水溶性不飽和単量体(B)の重合を行って得られる改質吸水性樹脂粒子、及び[2]架橋ポリマーを含有する吸水性樹脂粒子(A)、乾燥状態の前記吸水性樹脂粒子(A)に対して0.1~10質量%の、酸基を含有しない含窒素水溶性不飽和単量体(B)、及び水溶性ラジカル重合開始剤(C)の存在下で前記酸基を含有しない含窒素水溶性不飽和単量体(B)の重合を行う、改質吸水性樹脂粒子の製造方法、[3]上記[1]に記載の改質吸水性樹脂粒子を構成部材として有する、吸収性物品。【選択図】なし
