| abstract |
The present invention relates to a method for producing a super absorbent polymer and a super absorbent polymer prepared therefrom, which enables the production of a more improved super absorbent polymer without excessive use of a surfactant and a foaming agent. The method of preparing the super absorbent polymer is a water-soluble ethylenically unsaturated monomer having an acidic group at least partially neutralized, an anionic surfactant having an HLB value of 20 to 40, and a monomer mixture including an internal crosslinking agent to form a hydrogel polymer. Step to do; Drying, pulverizing and classifying the hydrogel polymer to form a base resin powder; And forming a surface crosslinking layer by further crosslinking the surface of the base resin powder in the presence of a surface crosslinking agent, wherein the anionic surfactant is used in a concentration of 50 to 200 ppmw in the monomer mixture, and the monomer mixture is Passing the solution containing the anionic surfactant at a space velocity of 50 to 1500 (min -1 ) through a tubular flow path in which a plurality of protruding pins are mounted, and mixing with a mixture including the monomer and an internal crosslinking agent It is formed in a way. |