ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,568, issued on March 25, was assigned to LG Chem Ltd. (Seoul, South Korea).
"Superabsorbent polymer and preparation method for the same" was invented by Young Jae Hur (Daejeon, South Korea), Taebin Ahn (Daejeon, South Korea), Dong Hoon Park (Daejeon, South Korea) and Jihye Ryu (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of preparing a superabsorbent polymer includes preparing a base resin in which an acrylic acid-based monomer having acidic groups which are at least partially neutralized and an internal crosslinking agent are crosslinked; and heating the base resin in the presence of a surface crosslinking agent to...