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.:
Date of Patent:
Mar. 24, 2026
Filed:
Oct. 28, 2021
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Assignee:
LG Chem, Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 5/1515 (2006.01); C08J 3/12 (2006.01); C08J 3/24 (2006.01); C08K 3/36 (2006.01); C08K 5/053 (2006.01); C08K 5/092 (2006.01); C08K 5/109 (2006.01);
U.S. Cl.
CPC ...
C08J 3/245 (2013.01); C08J 3/12 (2013.01); C08K 3/36 (2013.01); C08K 5/053 (2013.01); C08K 5/092 (2013.01); C08K 5/109 (2013.01); C08K 5/1515 (2013.01); C08J 2333/08 (2013.01);
Abstract
Provided is a method for preparing superabsorbent polymer, which includes conducting first surface crosslinking of a base resin powder while raising the temperature to a first temperature, in the presence of a first surface crosslinking agent; conducting second surface crosslinking of the first surface crosslinked base resin powder at a second temperature. According to the method of the present technology, surface crosslinking strength of the resulting superabsorbent polymer is increased, thus enabling preparation of superabsorbent polymer having little or no decline in absorbency under load even after anti-caking agent treatment.