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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.:

US 11358121 B1

PDFFull Text
Date of Patent:
Jun. 14, 2022

Filed:

Oct. 25, 2017

Super absorbent polymer and method for producing same

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Yong Hun Lee, Daejeon, KR;

Jung Min Sohn, Daejeon, KR;

Hyemin Lee, Daejeon, KR;

Chang Sun Han, Daejeon, KR;

Assignee:

LG Chem, Ltd.;

Attorney:

Lerner, David, Littenberg, Krumholz & Mentlik, LLP

Primary Examiner:

Joseph D Anthony

Int. Cl.
CPC ...
B01J 20/26 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); B01J 20/32 (2006.01); C08F 20/06 (2006.01); C08J 3/24 (2006.01); C08K 5/101 (2006.01); C08L 33/06 (2006.01); C08F 2/44 (2006.01); C08J 3/075 (2006.01); C08J 3/12 (2006.01); C08K 5/11 (2006.01);
U.S. Cl.
CPC ...
B01J 20/267 (2013.01); B01J 20/28016 (2013.01); B01J 20/3021 (2013.01); B01J 20/3085 (2013.01); B01J 20/321 (2013.01); B01J 20/3219 (2013.01); B01J 20/3282 (2013.01); B01J 20/3293 (2013.01); C08F 2/44 (2013.01); C08F 20/06 (2013.01); C08J 3/075 (2013.01); C08J 3/12 (2013.01); C08J 3/24 (2013.01); C08J 3/245 (2013.01); C08K 5/101 (2013.01); C08K 5/11 (2013.01); C08L 33/06 (2013.01); C08F 2810/20 (2013.01); C08J 2333/08 (2013.01);
Abstract

The present invention relates to a super absorbent polymer exhibiting more improved absorption under pressure and liquid permeability, even while basically maintaining excellent centrifuge retention capacity and absorption rate, and a method for producing the same. The super absorbent polymer comprises: a base polymer powder including 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 polymer powder and including a second crosslinked polymer in which the first crosslinked polymer is further crosslinked via a surface crosslinking agent, wherein the surface crosslinking agent includes at least two compounds having a solubility parameter value (σ) of 12.5 (cal/cm)or more, and wherein at least one of the surface crosslinking agents is an alkylene carbonate-based compound, and the remainder is selected from the group consisting of an alkylene carbonate-based compound and a polyhydric alcohol-based compound.

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