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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 9808787 B1

PDFFull Text
Date of Patent:
Nov. 07, 2017

Filed:

Oct. 06, 2016

Super absorbent polymer and preparation method thereof

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Chul Hee Ryu, Daejeon, KR;

Hyemin Lee, Daejeon, KR;

Assignee:

LG Chem, Ltd., , KR;

Attorney:

Lerner, David, Littenberg, Krumholz & Mentlik, LLP

Primary Examiner:

Jessica E Whiteley

Int. Cl.
CPC ...
C08F 2/46 (2006.01); C08F 2/50 (2006.01); C08G 61/04 (2006.01); B01J 20/30 (2006.01); C08F 2/10 (2006.01); C08J 3/075 (2006.01); A61L 15/60 (2006.01); A61L 15/24 (2006.01); B01J 20/26 (2006.01); C08J 3/24 (2006.01); B01J 20/28 (2006.01); C08F 120/06 (2006.01); C08L 101/14 (2006.01);
U.S. Cl.
CPC ...
B01J 20/3085 (2013.01); A61L 15/24 (2013.01); A61L 15/60 (2013.01); B01J 20/267 (2013.01); B01J 20/28016 (2013.01); B01J 20/30 (2013.01); B01J 20/3021 (2013.01); B01J 20/3028 (2013.01); B01J 20/3078 (2013.01); C08F 2/10 (2013.01); C08F 120/06 (2013.01); C08J 3/075 (2013.01); C08J 3/245 (2013.01); B01J 2220/68 (2013.01); C08J 2333/02 (2013.01); C08L 101/14 (2013.01);
Abstract

The present invention relates to a super absorbent polymer and a preparation method thereof. The super absorbent polymer includes surface crosslinked polymer particles prepared by surface crosslinking of particles of a base resin, wherein the base resin is polymerized from a monomer composition including water-soluble ethylene-based unsaturated monomers, and a water-soluble component, wherein the water-soluble component has a ratio (dwt/d(log M)) of 0.9 or less over molecular weights (M) ranging from 100,000 to 300,000 when measured from an eluted solution after swelling the super absorbent polymer for 1 hour, and wherein the content of the water-soluble component is 5% by weight or less, based on the total weight of the super absorbent polymer, when measured after swelling the super absorbent polymer for 1 hour. The super absorbent polymer has excellent liquid permeability even when swollen without a reduction in centrifuge retention capacity or absorbency under load while having improved permeability.

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