US 12,434,220 B2
Super absorbent polymer and preparation method thereof
Yu Jin Kim, Daejeon (KR); Hyeon Choi, Daejeon (KR); Seongkyun Kang, Daejeon (KR); Kiyoul Yoon, Daejeon (KR); Gicheul Kim, Daejeon (KR); Yoon Jae Min, Daejeon (KR); Seul Ah Lee, Daejeon (KR); and Ui Seok Chung, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/928,475
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Sep. 10, 2021, PCT No. PCT/KR2021/012330
§ 371(c)(1), (2) Date Nov. 29, 2022,
PCT Pub. No. WO2022/055290, PCT Pub. Date Mar. 17, 2022.
Claims priority of application No. 10-2020-0117132 (KR), filed on Sep. 11, 2020; and application No. 10-2021-0120214 (KR), filed on Sep. 9, 2021.
Prior Publication US 2023/0201801 A1, Jun. 29, 2023
Int. Cl. B01J 20/10 (2006.01); B01J 20/12 (2006.01); B01J 20/26 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01)
CPC B01J 20/267 (2013.01) [B01J 20/103 (2013.01); B01J 20/12 (2013.01); B01J 20/262 (2013.01); B01J 20/28004 (2013.01); B01J 20/28016 (2013.01); B01J 20/3021 (2013.01); B01J 20/3085 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A super absorbent polymer comprising
super absorbent polymer particles containing a cross-linked polymer of a water-soluble ethylene-based unsaturated monomer having at least partially neutralized acidic groups and a cross-linking agent;
hydrophobic particles; and
a carboxylic acid-based additive,
wherein the carboxylic acid-based additive is at least one selected from the group consisting of a carboxylic acid represented by the following Chemical Formula 1 and a salt thereof:

OG Complex Work Unit Chemistry
in Chemical Formula 1,
A is alkyl having 5 to 21 carbon atoms,
EO is ethylene oxide (—CH2CH2O—),
m is an integer of 0 to 8,
B1 is —OCO—, —COO—, or —COOCH(R1)COO—,
wherein R1 is alkyl having 1 to 5 carbon atoms,
B2 is alkylene having 1 to 5 carbon atoms, alkenylene having 2 to 5 carbon atoms, or alkynylene having 2 to 5 carbon atoms,
n is an integer of 1 to 3, and
C is a carboxyl group.