Title:
METHOD FOR PREPARING SUPER ABSORBENT RESIN
Document Type and Number:
WIPO Patent Application WO/2016/175428
Kind Code:
A1
Abstract:
The present invention relates to a method for preparing a super absorbent resin, the method comprising the steps of: a) preparing a hydrous gel polymer by means of thermopolymerizing or photopolymerizing a monomer composition comprising a polymerization initiator and a water-soluble ethylene unsaturated monomer; b) chopping the hydrous gel polymer; c) adding particles, which have properties of i) and ii), to the chopped hydrous gel polymer; d) chopping again the hydrous gel polymer to which the particles have been added; e) drying the hydrous gel polymer; f) grinding the dried hydrous gel polymer; g) adding a surface cross-linking agent to the ground hydrous gel polymer; and h) performing a surface cross-linking reaction, wherein i) the BET specific surface area is 300-1500 m2/g, and ii) the porosity is 50% or higher.
Inventors:
PARK BO-HEE (KR)
KIM YOUNG-SAM (KR)
KIM YOUNG-SAM (KR)
Application Number:
PCT/KR2016/000349
Publication Date:
November 03, 2016
Filing Date:
January 13, 2016
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C08F2/44; C08F2/10; C08J3/075; C08K3/04; C08K3/22; C08K5/00
Foreign References:
KR101507287B1 | 2015-03-30 | |||
US5087656A | 1992-02-11 | |||
JP2010253283A | 2010-11-11 | |||
JP2012217599A | 2012-11-12 | |||
JPH08253597A | 1996-10-01 |
Other References:
See also references of EP 3290448A4
Attorney, Agent or Firm:
LEE, Myongku (KR)
이명구 (KR)
이명구 (KR)
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