METHOD FOR PRODUCING WATER ABSORBENT RESIN

Abstract: the present invention aims to provide a method for producing a water-absorbing resin having excellent water absorption performance with high productivity. the present invention relates to a method for producing a water-absorbing resin that forms a physical gel upon absorption of water, the method including: (a1) reducing the molecular weight of a starch to obtain a partially degraded starch; (a2) introducing an acidic group into the partially degraded starch obtained in (a1) to obtain a water-soluble polymer; and (a3) drying the water-soluble polymer at 70� c. to 180� c. in the presence of water so that it has a solid content of 90% or more.

Inventor(s): Takahiro NOZAKI, Atsushi TANAKA, Tomoyuki NISHIMOTO, Tetsuya HOSOMI, Manabu MIYATA

CPC Classification: B01J20/24 (CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS)

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