	US 12,263,466 B2
	Preparing method of super absorbent polymer sheet and super absorbent polymer sheet prepared therefrom
Kiyoul Yoon, Daejeon (KR); Hyeon Choi, Daejeon (KR); Hyosook Joo, Daejeon (KR); Gicheul Kim, Daejeon (KR); and Ju Eun Kim, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Nov. 20, 2023, as Appl. No. 18/514,061.
Application 18/514,061 is a division of application No. 16/772,473, granted, now 11,857,946, previously published as PCT/KR2018/015932, filed on Dec. 14, 2018.
Claims priority of application No. 10-2017-0172269 (KR), filed on Dec. 14, 2017; and application No. 10-2018-0161304 (KR), filed on Dec. 13, 2018.
Prior Publication US 2024/0082819 A1, Mar. 14, 2024
Int. Cl. B01J 20/26 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01)

CPC B01J 20/267 (2013.01) [B01J 20/28033 (2013.01); B01J 20/3064 (2013.01); B01J 20/3085 (2013.01)]

3 Claims

1. A super absorbent polymer sheet prepared according to the preparing method comprising:

preparing a monomer composition comprising an acrylic acid-based monomer having at least partially neutralized acidic groups, a comonomer containing polyethylene glycol (methyl ether) (meth)acrylate, an internal cross-linking agent containing glycerol and polyethylene glycol diacrylate, an encapsulated blowing agent, and a polymerization initiator;

preparing a hydrogel polymer by thermal polymerization or photopolymerization of the monomer composition; and

drying the hydrogel polymer to form a super absorbent polymer sheet

wherein the blowing agent comprises a core comprising a hydrocarbon and a shell surrounding the core and formed of a thermoplastic resin,

wherein the super absorbent polymer sheet comprises an open pore channel structure, and

wherein the super absorbent polymer sheet has a thickness of 100 μm to 10 cm.