Invention Grant
- Patent Title: Super absorbent polymer and its preparation method
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Application No.: US16348657Application Date: 2018-09-04
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Publication No.: US11278866B2Publication Date: 2022-03-22
- Inventor: Su Jin Kim , Dae Woo Nam , Ki Hyun Kim , Joonil Cho
- 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, Littenberg, Krumholz & Mentlik, LLP
- Priority: KR10-2017-0168684 20171208,KR10-2018-0104572 20180903
- International Application: PCT/KR2018/010305 WO 20180904
- International Announcement: WO2019/112150 WO 20190613
- Main IPC: B01J20/26
- IPC: B01J20/26 ; B01J20/30 ; C08F220/06 ; C08J3/075 ; C08J3/12 ; C08J3/24 ; C08L33/06 ; C08K3/30

Abstract:
The present disclosure relates to a super absorbent polymer exhibiting improved rewetting property and excellent absorption property, and a preparation method of the same. This preparation method of a super absorbent polymer includes the steps of: preparing a base resin in which an acrylic acid-based monomer having at least partially neutralized acidic groups and an internal cross-linking agent are cross-linked and polymerized; and heating the base resin in the presence of a surface cross-linking agent to carry out surface modification, wherein the internal cross-linking agent includes a poly(meth)acrylate of polyols-based first internal cross-linking agent and a polyglycidyl ether of polyols-based second internal cross-linking agent in a specific weight ratio.
Information query