Title: Water-absorbent resin, process for production thereof, and water-absorbent resin composition
Application Number: 95191547 Application Date: 1995.12.08
Publication Number: 1140458 Publication Date: 1997.01.15
Approval Pub. Date: 2001.09.19 Granted Pub. Date: 2001.09.19
International Classifi-cation: C07C257/14;C07D233/64;C07D239/06;C07D243/04;C08J9/06;C08J9/16
Applicant(s) Name: Nippon Shokubai Co., Ltd. Address:
Inventor(s) Name: Ishizaki Kunihiko;Obara Hisanobu;Hadara Nobuyuki
Attorney & Agent: LIU GUOPING
Abstract:
    A water-absorbent resin is produced by dispersing a solid blowing agent having an average particle diameter within a range of from 1 mum to 100 mum 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, a sanitary material, it is possible to improve the absorption rate and water retention capacity, and prevent leakage of fluid from the sanitary material.
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