Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kunihiko Ishizaki0
Teruyuki Kanto0
Yukihiro Matsumoto0
Date of Patent
July 3, 2007
0Patent Application Number
111436280
Date Filed
June 3, 2005
0Patent Primary Examiner
Patent abstract
The present invention provides a process for producing a water-absorbent resin of which the residual monomer content and the extractable content are low. The process for producing a water-absorbent resin comprises the step of polymerizing at least one monomer component including acrylic acid and/or its salt as major components to produce a water-absorbent resin that is a neutralized salt, and this process is characterized in that the acrylic acid is a product obtained by catalytic gas phase oxidation of propylene and/or propane and has a protoanemonin content of not more than 10 ppm, and in that the resultant water-absorbent resin has a neutralization ratio of not less than 50 mol %.
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