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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 12616957 B1

PDFFull Text
Date of Patent:
May. 05, 2026

Filed:

Jun. 07, 2021

Block copolymer, method for producing same, and absorber and absorbent article using same

Applicant:

Kuraray Co., Ltd., Kurashiki, JP;

Inventors:

Takumi Takayama, Kurashiki, JP;

Kazuhiko Maekawa, Kurashiki, JP;

Kazutoshi Mishima, Kurashiki, JP;

Assignee:

KURARAY CO., LTD., Kurashiki, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Mark S Kaucher

Int. Cl.
CPC ...
B01J 20/26 (2006.01); A23B 2/758 (2025.01); A61L 15/24 (2006.01); B01J 20/28 (2006.01); C08F 297/02 (2006.01); A01K 1/015 (2006.01);
U.S. Cl.
CPC ...
B01J 20/264 (2013.01); A23B 2/758 (2025.01); A61L 15/24 (2013.01); B01J 20/28016 (2013.01); C08F 297/026 (2013.01); A01K 1/0155 (2013.01); A01K 1/0157 (2013.01);
Abstract

A block copolymer (A) including a vinyl alcohol-based polymer block (b) and an ionic polymer block (c) containing a monomer unit with an ionic group forming a salt and a vinyl alcohol-based monomer unit. The ionic group is a carboxylic acid group, a sulfonic acid group, or an ammonium group. The vinyl alcohol-based polymer block (b) has a number-average molecular weight (Mn) from 15,000 to 220,000. The ionic polymer block (c) has a content of the vinyl alcohol-based monomer unit from 5 to 95 mol % based on the total monomer units. The block copolymer (A) has a number-average molecular weight (Mn) from 20,000 to 440,000. A ratio (Mn/Mn) of the number-average molecular weight (Mn) to the number-average molecular weight (Mn) is from 0.1 to 0.9.

Find Patent Forward Citations

Takayama, Takumi. (2026). Block copolymer, method for producing same, and absorber and absorbent article using same (U.S. Patent No. 12616957). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12616957

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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