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:
Aug. 18, 2015
Filed:
Dec. 16, 2013
Lg Chem, Ltd., Seoul, KR;
Yong Hun Lee, Daejeon, KR;
Chang Sun Han, Daejeon, KR;
Tae Young Won, Daejeon, KR;
Dae Woo Nam, Daejeon, KR;
Sung Soo Park, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
The present invention relates to a method of preparing a super absorbent polymer (SAP). The preparation method for SAP according to the present invention includes: preparing a first polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition comprising a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; preparing a second polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition comprising a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the first polymer; milling the dried first polymer; and mixing the milled first polymer with the second polymer in the free swelling state using the crosslinking solution to cause a crosslinking reaction of the first and second polymers. According to the present invention, it is possible to obtain a super absorbent polymer (SAP) having high centrifuge retention capacity and high absorption under pressure.