Manufacturing method of super absorbent polymer
AssigneeLG Chem, Ltd.
InventorsSung Soo Park, Jeong Kug Cho, Yoon Jae Min, Gicheul Kim, Se Won Baek, Kwang Hyon Kim
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Abstract
The present invention relates to a manufacturing method of a super absorbent polymer. More specifically, the present invention relates to a manufacturing method of a super absorbent polymer capable of reducing energy, reducing a process cost, and reducing a load on a device, at the time of drying due to reduction in an amount of water used during reassembly of fines, while manufacturing a super absorbent polymer exhibiting a reduced generation amount of re-fines and having excellent physical properties.
Claims10
A manufacturing method of a super absorbent polymer comprising:
- preparing a hydrogel polymer by performing thermal polymerization or photopolymerization on a monomer composition including a water-soluble ethylenically unsaturated monomer and a polymerization initiator;
- drying and pulverizing the hydrogel polymer, and performing classification into fines having a particle diameter of 150 μm or less and normal particles having a particle diameter of more than 150 μm to 850 μm or less;
- manufacturing a fine reassembly by mixing the fines with water, followed by reassembling;
- and
- manufacturing an extruded fine reassembly by extruding, pulverizing, and classifying the fine reassembly,
- wherein in the manufacturing of the fine reassembly, 1 to 30 parts by weight of water is used based on 100 parts by weight of the fines, and
- the manufacturing of the extruded fine reassembly includes extruding the fine reassembly at a temperature of 40 to 105° C.
Dependencies are inferred from the claim text.