Invention Grant
- Patent Title: Super absorbent polymer and method for producing same
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Application No.: US17742548Application Date: 2022-05-12
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Publication No.: US12053757B2Publication Date: 2024-08-06
- Inventor: Yong Hun Lee , Jung Min Sohn , Hyemin Lee , Chang Sun Han
- Applicant: LG Chem, Ltd.
- Applicant Address: KR Seoul
- Assignee: LG Chem, Ltd.
- Current Assignee: LG Chem, Ltd.
- Current Assignee Address: KR Seoul
- Agency: Lerner David LLP
- Priority: KR 20160178406 2016.12.23
- The original application number of the division: US16094563
- Main IPC: B01J20/26
- IPC: B01J20/26 ; B01J20/28 ; B01J20/30 ; B01J20/32 ; C08F2/44 ; C08F20/06 ; C08J3/075 ; C08J3/12 ; C08J3/24 ; C08K5/101 ; C08K5/11 ; C08L33/06

Abstract:
The present invention relates to a super absorbent polymer exhibiting more improved absorption under pressure and liquid permeability, even while basically maintaining excellent centrifuge retention capacity and absorption rate, and a method for producing the same. The super absorbent polymer comprises: a base polymer powder including a first crosslinked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; and a surface crosslinked layer formed on the base polymer powder and including a second crosslinked polymer in which the first crosslinked polymer is further crosslinked via a surface crosslinking agent, wherein the surface crosslinking agent includes at least two compounds having a solubility parameter value (σ) of 12.5 (cal/cm3)1/2 or more, and wherein at least one of the surface crosslinking agents is an alkylene carbonate-based compound, and the remainder is selected from the group consisting of an alkylene carbonate-based compound and a polyhydric alcohol-based compound.
Public/Granted literature
- US20220266221A1 Super Absorbent Polymer And Method For Producing Same Public/Granted day:2022-08-25
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