Patent ID: 9156974
Filing Date: 2015-10-13
Classification: A61L,B01J,C08F,C08J,C08L

Abstract:
1. A method of preparing a super absorbent polymer, including the steps of: preparing a first hydrogel polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; preparing a second hydrogel polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and milling the first hydrogel polymer and distributing the first hydrogel polymer into a fine powder having a particle diameter below 150 μm and a base resin having a particle diameter of 150 μm to 850 μm; fabricating a reassembled body of the fine powder by mixing the fine powder and the second hydrogel polymer; and mixing the reassembled body of the fine powder with the first hydrogel polymer, and drying and milling the reassembled body of the fine powder mixed with the first hydrogel polymer, wherein the second hydrogel polymer has higher water holding capacity than the first hydrogel polymer.