The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2020
Filed:
Dec. 13, 2017
Lg Chem, Ltd., Seoul, KR;
Ki Youl Yoon, Daejeon, KR;
Hyo Sook Joo, Daejeon, KR;
Gi Cheul Kim, Daejeon, KR;
Hyeon Choi, Daejeon, KR;
Ju Eun Kim, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
The present disclosure relates to a preparation method of a porous super absorbent polymer including the steps of preparing a monomer neutralized solution by adding an internal cross-linking agent, an initiator, an inorganic filler, and a nonionic surfactant to a neutralized solution obtained by neutralizing at least 80 mol % of a water soluble ethylene-based unsaturated monomer containing acidic groups; high-shear mixing the monomer neutralized solution; preparing a hydrogel polymer from the high-shear mixed monomer neutralized solution by thermal polymerization or photopolymerization; and preparing a base resin powder by drying, pulverizing, and classifying the hydrogel polymer.