METHOD FOR PRODUCING AQUEOUS LIQUID-ABSORBING RESIN

摘要

Provided is a method for producing an aqueous liquid-absorbing resin having high water retention capacity and little discoloration or odor. The present invention is a method for producing an aqueous liquid-absorbing resin including a step for radical-polymerizing radical polymerizable monomers (a) having acrylic acid as a main component in the presence of an internal cross-linking agent (b) and water, wherein the method for producing an aqueous liquid-absorbing resin is characterized in that radical polymerization is carried out in the presence of hypophosphorous acid (salt) (c), the upper limit of the concentration of the monomers (a) supplied is less than 30 wt% based on the weight of the polymerization solution, and the maximum temperature reached by the polymerization solution during polymerization is less than the boiling point thereof.