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:
Apr. 15, 2014
Filed:
Nov. 22, 2011
Tae-young Won, Daejeon, KR;
Chang-sun Han, Daejeon, KR;
Gi-cheul Kim, Daejeon, KR;
Sang-gi Lee, Daejeon, KR;
Kyu-pal Kim, Yeosu-si, KR;
Sung-soo Park, Seoul, KR;
Gyu Leem, Daejeon, KR;
Tae-Young Won, Daejeon, KR;
Chang-Sun Han, Daejeon, KR;
Gi-Cheul Kim, Daejeon, KR;
Sang-Gi Lee, Daejeon, KR;
Kyu-Pal Kim, Yeosu-si, KR;
Sung-Soo Park, Seoul, KR;
Gyu Leem, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
The present invention relates to a method of preparing a superabsorbent polymer, including the steps of: preparing a hydrous gel phase polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the hydrous gel phase polymer; milling the dried polymer; adding a surface cross-linking agent to the milled polymer; and elevating the temperature of the polymer including the surface cross-linking agent at a speed of 3° C./min to 15° C./min, and carrying out a surface cross-linking reaction at 100° C. to 250° C.