| abstract |
To provide an absorbent having excellent anti-coloring properties. A water absorbent resin (A), a water-insoluble particle (B) and an oxycarboxylic acid (C) are used as essential constituents. As the water-insoluble particles (B), the specific surface area measured in accordance with JIS Z8830 (2001) is 80 to 500 m 2 / g, and the pH (25 ° C.) of the 4 wt% aqueous dispersion is 3 to 6. Silica is preferable, and the acid dissociation index (pKa, 25 ° C.) of the oxycarboxylic acid (C) is preferably 2 to 6, and the content of (B) is 0.00 based on the weight of (A). It is preferable that the content of 01 to 5% by weight and the content of (C) is 0.05 to 15% by weight. [Selection figure] None |