Super Absorbent Polymer and Preparation Method Thereof
AssigneeLG Chem, Ltd.
InventorsHyeran Moon, Haesung Yun, Hyungsam Choi, Seonjung Jung, Ji Seok Lee, Yoon Hyung Hur, Hwanhee Lee
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Abstract
Provided are a superabsorbent polymer and a method of preparing the same, more particularly, a superabsorbent polymer capable of exhibiting an improved bacterial growth-inhibitory property without deterioration in a water retention capacity of the superabsorbent polymer, and a method of preparing the same.
Claims15
A superabsorbent polymer comprising a base polymer comprising a crosslinked polymer which is obtained by polymerizing an acrylic acid-based monomer including acidic groups of which at least part is neutralized, a polymerizable antibacterial monomer represented by Chemical Formula 1, and a first crosslinking agent,
- wherein at least part of the base polymer is surface-treated by a second crosslinking agent:
- in Chemical Formula 1,
- R1 to R3 are each independently hydrogen or methyl,
- R4 is hydrogen or a substituted or unsubstituted alkyl having 1 to 20 carbon atoms, and
- L1 is a substituted or unsubstituted alkylene having 1 to 10 carbon atoms.
A method of preparing a superabsorbent polymer, the method comprising the steps of:
- forming a water-containing gel polymer by performing a crosslinking polymerization of an acrylic acid-based monomer including acidic groups of which at least part is neutralized, and a polymerizable antibacterial monomer represented by Chemical Formula 1 in the presence of a first crosslinking agent and a polymerization initiator;
- forming a base polymer comprising a crosslinked polymer by drying, pulverizing, and classifying the water-containing gel polymer;
- and
- surface-crosslinking the base polymer by heat treatment in the presence of a second crosslinking agent:
- in Chemical Formula 1,
- R1 to R3 are each independently hydrogen or methyl,
- R4 is hydrogen or a substituted or unsubstituted alkyl having 1 to 20 carbon atoms, and Li is a substituted or unsubstituted alkylene having 1 to 10 carbon atoms.
Dependencies are inferred from the claim text.