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Title:
SUPERABSORBENT POLYMER AND METHOD FOR PREPARING SAME
Document Type and Number:
WIPO Patent Application WO/2020/122390
Kind Code:
A1
Abstract:
The present invention relates to: a superabsorbent polymer which has not only excellent basic absorption performance, but also exhibits improved permeability under pressure so that rewet properties and leakage suppression properties for sanitary products such as a diaper, etc. can be improved thereby; and a method for preparing same. The superabsorbent polymer comprises: a base resin powder containing a first crosslinked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; and a surface crosslinked layer formed on the base resin powder and containing a second crosslinked polymer in which the first crosslinked polymer is additionally crosslinked by mediation of a surface crosslinker, wherein the surface crosslinker comprises a polymer-type first surface crosslinker which has a number average molecular weight of 300 or more and bears a plurality of hydroxyl groups or epoxy groups.

Inventors:
PARK BOHEE (KR)
KIM JUN KYU (KR)
KIM DONG HYUN (KR)
Application Number:
PCT/KR2019/013302
Publication Date:
June 18, 2020
Filing Date:
October 10, 2019
Export Citation:
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Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C08J3/24; B29B9/12; B29B11/10; B29B11/14; B29B13/06; C08F2/44; C08J3/12; C08K5/00; C08K5/053; C08K5/1515
Domestic Patent References:
WO2014021388A12014-02-06
Foreign References:
KR20180067940A2018-06-21
CN105754754A2016-07-13
KR20170033634A2017-03-27
KR101797391B12017-11-14
US20180179329A12018-06-28
EP0937736A21999-08-25
JPH10244151A1998-09-14
Other References:
REINHOLD SCHWALM: "UV Coatings: Basics, Recent Developments and New Application", 2007, ELSEVIER, pages: 115
"Principle of Polymerization", 1981, WILEY, pages: 203
See also references of EP 3819329A4
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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