| abstract |
The present invention relates to a method for preparing a super absorbent polymer. The method comprises: a step for producing a neutralized monomer solution by adding an internal cross-linking agent, an initiator, an inorganic filler, and a non-ionic surfactant into a neutralized solution in which 80 mol% or more of a water-soluble ethylene-based unsaturated monomer having an acidic group is neutralized; a step for high-shear-mixing the neutralized monomer solution; a step for producing a hydrogel polymer from the high-shear-mixed neutralized monomer solution through thermal polymerization or photopolymerization; and a step for producing a base resin powder by drying, pulverizing, and classifying the hydrogel polymer. |