| abstract |
(57) [Summary] [Structure] XR 3-n SiY n (wherein, X represents a functional group capable of reacting with a functional group of the water-absorbent resin, and R represents an organic group) in the presence of water. , Y represents a hydrolyzable group, and n is an integer of 1 to 3) and a water absorbent resin treated with a silane coupling agent, and an ultrafine particle having an average particle diameter of 0.05 μm or less. A water-absorbent resin composition comprising silica whose surface is not hydrophobic and an absorbent article using the same. [Effect] The water-absorbent resin composition of the present invention is a composition in which the absorbability such as diffusivity is significantly improved without impairing the original water-absorbing ability of the water-absorbent resin. |