Method for producing improved water-absorbent resins
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United States of America Patent
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May 6, 1986
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N/A
app pub date -
Feb 4, 1985
filing date -
Feb 4, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for easily, inexpensively and efficiently producing an improved water-absorbent resin having a high water absorbency and a high water absorption rate and capable of forming a gel having a high gel strength and nonstickiness, in which water-absorbent resin particles which contain water and a crosslinking agent and are in the semi-swollen state are agitated at an elevated temperature in the presence of an inert inorganic powder to conduct the crosslinking of the resin, while removing water, the water-absorbent resin containing a monomer units having a carboxyl group in the form of free acid or a metal salt.
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