Water-absorbent resin, water-absorbent material, and water-absorbent article

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United States of America Patent

PATENT NO 10265226
APP PUB NO 20150216740A1
SERIAL NO

14426940

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Abstract

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One purpose of the present invention is to provide a water-absorbent resin having excellent water absorption characteristics and being capable of improving the shape-retaining characteristics of a water-absorbent material when used in the water-absorbent material. A water-absorbent resin obtained by performing reversed phase suspension polymerization of a water-soluble ethylenically unsaturated monomer in a hydrocarbon dispersion medium, using a radical polymerization initiator, said resin being capable of having both excellent absorption performance and shape retention in a water-absorbent material using the water-absorbent resin, as a result of fulfilling the conditions of: (1) having a water-retention capacity of physiological saline of at least 38 g/g; (2) having a water-absorption capacity of physiological saline under a load of 4.14 kPa of at least 15 ml/g; and (3) having a tan δ of a 50-fold swollen gel of at least 2.10×10−2.

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Patent Owner(s)

  • SUMITOMO SEIKA CHEMICALS CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kondo, Kimihiko Osaka, JP 9 41
Takatori, Junichi Himeji, JP 31 123
Watanabe, Ayaka Saitama, JP 7 25

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