WATER-ABSORBENT RESIN, PROCESS FOR PRODUCTION THEREOF, AND WATER-ABSORBENT RESIN COMPOSITION

摘要

A water-absorbent resin is produced by dispersing a solid blowing agent having an average particle diameter within a range of from 1 mu m to 100 mu m in an aqueous monomer solution containing an unsaturated monomer and a cross-linking agent, and then polymerizing the unsaturated monomer. The water-absorbent resin has excellent water absorption characteristics, such as improved dispersion and absorption rate of aqueous fluid, enhanced water retention capacity and dry touch, lower water-soluble component content, and lower residual monomer content. When a water-absorbent resin composition using the water-absorbent resin is used for, for example, a sanitary material, it is possible to improve the absorption rate and water retention capacity, and prevent leakage of fluid from the sanitary material.