| abstract |
The present invention provides a water absorbent which can reduce the stickiness after liquid absorption when used as a sanitary material, and a method for producing the same. The present invention provides a method for producing a water absorbing agent having a centrifugal separator retention capacity (CRC) of 30 g/g or more, the production method comprising a polymerization step, a drying step, and a surface crosslinking step of an aqueous monomer solution containing acrylic acid (salt). , the process of adding α-hydroxycarboxylic acid (salt) is included before the drying process. By adding an α-hydroxycarboxylic acid (salt) before the drying step, the molecular weight of the soluble component eluted when the water absorbing agent absorbs liquid and swells can be reduced, and as a result, the amount of the water absorbing agent that causes unpleasantness in actual use such as a disposable diaper can be reduced. Sticky feeling after absorbing liquid. |