Water-absorbent resin having improved water-absorbency and improved water-dispersibility and process for producing same

A process for producing a water-absorbent resin having an improved water-absorbency, characterized by crosslinking a crosslinked carboxylate-containing water-absorbent resin wherein said resin is acrylate homopolymer, acrylate copolymer, methacrylate homopolymer, or methacrylate copolymer with 0.005-5% by weight of a crosslinking agent having at least two functional groups capable of reacting with a reactive group of said resin wherein said reactive group is selected from the class of carboxylate, hydroxyl, sulfonic acid, and amino in the presence of water in a proportion of 0.01 to 1.3 parts by weight per part by weight of the resin in 0.1 to 50 parts by weight, per part by weight of said resin of an invert solvent which does not affect the water-absorbent resin.