METHOD FOR PREPARING SUPERABSORBENT POLYMER

Title:

METHOD FOR PREPARING SUPERABSORBENT POLYMER

Document Type and Number:

WIPO Patent Application WO/2013/154219

Kind Code:

A1

Abstract:

The present invention relates to a method for preparing a superabsorbent polymer, and more particularly, to a method for preparing a highly absorbent polymer, comprising a step of spraying a monomer composition onto a substrate having a hydrophobic surface with a specific tan angle and performing UV polymerization in a polymerization reactor having a weakly hydrophilic surface. The method of the present invention is advantageous in that an existing monomer solution in the form of a sheet is converted into the form of particles so as to enable UV irradiation up to a deep layer, thus improving the conversion into polymers. Further, the control of the particles of prepared polymers can be easily performed in order to minimize or simplify a recirculation process, narrow the particle-size distribution, and improve uniformity, thus providing a high-quality superabsorbent polymer.

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Inventors:

LEEM GYU (KR)
KIM GI-CHEUL (KR)
LEE SANG-GI (KR)
KIM KYU-PAL (KR)
WON TAE-YOUNG (KR)
HAN CHANG-SUN (KR)

Application Number:

PCT/KR2012/002817

Publication Date:

October 17, 2013

Filing Date:

April 13, 2012

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)
LEEM GYU (KR)
KIM GI-CHEUL (KR)
LEE SANG-GI (KR)
KIM KYU-PAL (KR)
WON TAE-YOUNG (KR)
HAN CHANG-SUN (KR)

International Classes:

C08F2/00; B01J2/02; C08F2/01; C08F20/00; C08J3/075

Domestic Patent References:

WO2005092956A1

2005-10-06

Foreign References:

JP2006199862A	2006-08-03
JP2010513632A	2010-04-30
JP2002265528A	2002-09-18
JP2006152095A	2006-06-15
JP2005298681A	2005-10-27
JPS56161408A	1981-12-11
JPS57158209A	1982-09-30
JPS57198714A	1982-12-06
JP2004250689A	2004-09-09
KR100330127B1	2002-08-08

Other References: