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US 2019/0077927 A1Published application
A Method For Preparing Superabsorbent Polymer, And Superabsorbent Polymer
AssigneeLG Chem, Ltd.
InventorsKi Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
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Abstract
The present invention relates to a method for preparing superabsorbent polymer that introduces a plate type and rod-shaped clay additive in the superabsorbent polymer, and thus exhibits basic properties of a superabsorbent polymer equivalent to or much better than the existing superabsorbent polymer through multi-crosslinking, and particularly, can improve absorbency under pressure (AUP), and a superabsorbent polymer obtained thereby.
Claims15
A method for preparing a superabsorbent polymer comprising the steps of:
- mixing water-soluble ethylenically unsaturated monomers having acid groups of which at least a part are neutralized, an internal crosslinking agent, a polymerization initiator, and additives to prepare a monomer composition;
- polymerizing the monomer composition to form a hydrogel polymer comprising a multi-crosslinked polymer;
- and
- drying, grinding, and sieving the hydrogel polymer to form a base polymer powder,
- wherein the additives comprise a plate type and rod-shaped clay that is modified by an amine-based organic compound and has an amine group introduced on the surface thereof.
2 more elements
A superabsorbent polymer comprising a crosslinked polymer of
- water-soluble ethylenically unsaturated monomers having acid groups of which at least a part are neutralized, and
- a plate type and rod-shaped clay that is modified by an amine-based organic compound and has an amine group introduced on the surface thereof.
Dependencies are inferred from the claim text.