US 12,409,439 B1
Super absorbent polymer
Dong Hoon Park, Daejeon (KR); Yeneung Lee, Daejeon (KR); Sung Soo Park, Daejeon (KR); Jiyeon Byeon, Daejeon (KR); Junwye Lee, Daejeon (KR); and Kwangin Shin, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Mar. 13, 2025, as Appl. No. 19/078,460.
Claims priority of application No. 10-2024-0064063 (KR), filed on May 16, 2024.
Int. Cl. B01J 20/26 (2006.01)
CPC B01J 20/261 (2013.01) [B01J 20/267 (2013.01); B01J 2220/68 (2013.01)] 12 Claims
 
1. A polyacrylic acid (salt)-based super absorbent polymer, comprising:
carbon, oxygen, and sodium on the surface thereof; and
the super absorbent polymer satisfies Equation 1 below:
XC═O+XO—C═O≥6(at %)  [Equation 1]
wherein,
XC═O represents a content (at %) of carbon included in a C═O bond structure among all elements present on the surface of the super absorbent polymer according to XPS analysis, and
XO—C═O represents a content (at %) of carbon included in a O—C═O bond structure among all elements present on the surface of the super absorbent polymer according to XPS analysis.