Invention Grant
- Patent Title: Super absorbent polymer granules and preparation method thereof
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Application No.: US15751049Application Date: 2016-09-27
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Publication No.: US10662296B2Publication Date: 2020-05-26
- Inventor: Dae Woo Nam , Kyung Moo Lee , Jae Hong Lee , Chang Sun Han
- Applicant: LG Chem, Ltd.
- Applicant Address: KR
- Assignee: LG Chem, Ltd.
- Current Assignee: LG Chem, Ltd.
- Current Assignee Address: KR
- Agency: Lerner, David, Littenberg, Krumholz & Mentlik, LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@3d7b2dc5
- International Application: PCT/KR2016/010823 WO 20160927
- International Announcement: WO2017/065426 WO 20170420
- Main IPC: C08J3/24
- IPC: C08J3/24 ; C08J3/075 ; C08J3/12 ; A61L15/60 ; C08K3/36

Abstract:
The present disclosure relates to a preparation method of super absorbent polymer granules and super absorbent polymer granules prepared according to the same. More specifically, the preparation method of the present disclosure includes the steps of: forming a hydrogel polymer by carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into a first fine powder having a particle size of 150 μm or less, and a base resin having a particle size of 150 μm or more and 850 μm or less; surface-crosslinking the base resin; classifying the surface crosslinked base resin to separate a second fine powder having a particle size of 150 μm or less; and forming fine powder granules by mixing the first fine powder, the second fine powder, and silica in a wet state.
Public/Granted literature
- US20180237593A1 SUPER ABSORBENT POLYMER GRANULES AND PREPARATION METHOD THEREOF Public/Granted day:2018-08-23
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