METHOD FOR PREPARING SUPER ABSORBENT POLYMER

摘要

The present invention relates to a method for preparing a super absorbent polymer. The method for preparing a super absorbent polymer according to the present invention comprises the steps of: preparing a first polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; preparing a second polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the first polymer; grinding the dried first polymer; and carrying out a cross-linking reaction with respect to the first polymer and the second polymer by mixing the ground first polymer and the second polymer which is free-swollen with a cross-linking agent solution. According to the present invention, it is possible to obtain a super absorbent polymer having high water-retaining ability and pressure absorption capacity.