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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 12115516 B1

PDFFull Text
Date of Patent:
Oct. 15, 2024

Filed:

Mar. 04, 2020

Method for manufacturing carboxymethyl cellulose particles, carboxymethyl cellulose particles manufactured thereby, and absorbent article comprising same

Applicant:

Lotte Fine Chemical Co., Ltd., Ulsan, KR;

Inventors:

Soo Hee Park, Ulsan, KR;

Hee Soo Kim, Hwaseong-Si, KR;

Sang Yob Kim, Goyang-Si, KR;

Assignee:

LOTTE FINE CHEMICAL CO., LTD., Ulsan, KR;

Attorney:

Osha Bergman Watanabe & Burton LLP

Primary Examiner:

Brian A McCaig

Int. Cl.
CPC ...
B01J 20/24 (2006.01); A61L 15/28 (2006.01); A61L 15/60 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); C08B 1/08 (2006.01); C08B 11/12 (2006.01); C08B 15/00 (2006.01); C08J 3/12 (2006.01); C08J 3/24 (2006.01);
U.S. Cl.
CPC ...
B01J 20/24 (2013.01); A61L 15/28 (2013.01); A61L 15/60 (2013.01); B01J 20/28011 (2013.01); B01J 20/28016 (2013.01); B01J 20/3021 (2013.01); B01J 20/3071 (2013.01); B01J 20/3085 (2013.01); C08B 1/08 (2013.01); C08B 11/12 (2013.01); C08B 15/005 (2013.01); C08J 3/126 (2013.01); C08J 3/245 (2013.01); B01J 2220/44 (2013.01); B01J 2220/68 (2013.01); C08J 2301/28 (2013.01);
Abstract

The present disclosure relates to a method for manufacturing carboxymethyl cellulose particles, cellulose inducer particles manufactured by the method, and an absorbent article comprising same. The method comprises: (1) a step of obtaining alkalized cellulose by reacting a cellulose raw material with an alkalizer; (2) a step of obtaining carboxymethyl cellulose by reacting the alkalized cellulose with a carboxy methylating agent; (3) a primary cross-linking step of obtaining a slurry-phase carboxymethyl cellulose cross-linked body by reacting the carboxymethyl cellulose with a core cross-linker; (4) a step of washing and dehydrating after filtering the slurry-phase carboxymethyl cellulose cross-linked body; (5) a secondary cross-linking step of obtaining carboxymethyl cellulose having a core-shell structure by reacting the carboxymethyl cellulose cross-linked body having undergone Step (4) with a surface cross-linker; and (6) a step of obtaining carboxymethyl cellulose particles having a core-shell structure by drying and pulverizing the carboxymethyl cellulose having a core-shell structure.

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