METHOD FOR PRODUCING A WATER-ABSORBENT RESIN

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United States of America Patent

SERIAL NO

14100331

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Abstract

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The present invention provides a water-absorbent resin produced by a reversed-phase suspension polymerization method, which contains a small amount of a petroleum hydrocarbon dispersion medium remaining therein used in reversed-phase suspension polymerization, and thus reducing an odor originating from the petroleum hydrocarbon dispersion medium, when the water-absorbent resin absorbs water, and also which is suitable for use in hygienic materials; an absorbent material and an absorbent article. More particularly, the present invention provides a water-absorbent resin obtained by subjecting an aqueous solution of a water-soluble ethylenically unsaturated monomer to reversed-phase suspension polymerization in a petroleum hydrocarbon dispersion medium in the presence of a surfactant, wherein the amount of the petroleum hydrocarbon dispersion medium remaining in the water-absorbent resin is 2,000 ppm or less; and an absorbent material and an absorbent article using the same.

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO SEIKA CHEMICALS CO LTDJAPAN HYOGO PREFECTURE HYOGO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nawata, Yasuhiro Kako-gun, JP 29 244
Yokoyama, Hideki Himeji-shi, JP 42 404

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