Composition of Super Absorbent Polymer and Preparation Method Thereof
AssigneeLG Chem, Ltd.
InventorsJi Hong Min, Hyemin Cho
Life of this patent
Estimating the term…
Abstract
Provided are a superabsorbent polymer composition and a preparation method thereof. Particularly, provided are a superabsorbent polymer composition with deodorizing ability and a preparation method thereof. The superabsorbent polymer composition includes a base polymer that utilizes an acrylic acid-based monomer. Partially neutralized acidic groups of the monomer and an internal crosslinking agent are crosslinked-polymerized, and a surface-crosslinked layer is formed on the surface of the base polymer. The crosslinked polymer is additionally crosslinked via a surface crosslinking agent. Tannic acid, an iodine compound; and a chelating agent may also be included in the composition.
Claims15
A superabsorbent polymer composition comprising:
- a base polymer including a crosslinked polymer, wherein an acrylic acid-based monomer having at least partially neutralized acidic groups and an internal crosslinking agent are crosslinked-polymerized, and a surface-crosslinked layer is formed on a surface of the base polymer, wherein the crosslinked polymer is additionally crosslinked via a surface crosslinking agent;
- a tannic acid;
- an iodine compound;
- and
- a chelating agent.
A method of preparing a superabsorbent polymer composition, comprising:
- forming a water-containing gel polymer by crosslinking polymerizing an acrylic acid-based monomer having at least partially neutralized acidic groups in the presence of an internal crosslinking agent and a polymerization initiator (step 1);
- preparing a base polymer including a crosslinked polymer by coarsely pulverizing, drying, and pulverizing the water-containing gel polymer (step 2);
- preparing a mixture by mixing the base polymer with a surface crosslinking agent (step 3);
- and
- preparing a superabsorbent polymer, in which a surface-crosslinked layer is formed on the surface of the base polymer, by heat treatment of the mixture (step 4);
- wherein a tannic acid and an iodine compound are mixed with the superabsorbent polymer of the step 4, on which the surface-crosslinked layer is formed, and a chelating agent is mixed in the coarse pulverization step of the step 2 or mixed with the superabsorbent polymer of the step 4, on which the surface-crosslinked layer is formed.
Dependencies are inferred from the claim text.