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:
May. 21, 2019
Filed:
Jan. 13, 2016
Lg Chem, Ltd., Seoul, KR;
Bo-Hee Park, Daejeon, KR;
Young-Sam Kim, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
The present invention relates to a method for preparing a superabsorbent polymer including a) preparing a hydrogel phase polymer by thermopolymerizing or photopolymerizing a monomer composition including a water-soluble ethylenically unsaturated monomer and a polymerization initiator; b) chopping the hydrogel phase polymer; c) adding particles having properties of the following i) and ii) to the chopped hydrogel phase polymer; d) chopping the particle-added hydrogel phase polymer again; e) drying the hydrogel phase polymer; f) milling the dried hydrogel phase polymer; g) adding a surface crosslinking agent to the milled hydrogel phase polymer; and h) carrying out a surface crosslinking reaction.