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:
Sep. 15, 2026
Filed:
Apr. 09, 2021
Mitsui Chemicals, Inc., Tokyo, JP;
Yoshihiko Tomita, Ichihara, JP;
Tsuyoshi Matsumoto, Kisarazu, JP;
Yasuyuki Kagawa, Ichihara, JP;
Toshihiro Yoshimura, Ichihara, JP;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
In an ingredient for a secondary cell separator coating material including a water-soluble polymer having a repeating unit derived from methacrylamide and a repeating unit derived from a carboxy group-containing vinyl monomer, a content ratio of the repeating unit derived from the methacrylamide is 60% by mass or more and 97% by mass or less, and a content ratio of the repeating unit derived from the carboxy group-containing vinyl monomer is 3% by mass or more and 40% by mass or less with respect to the total amount of the water-soluble polymer; a weight average molecular weight of the water-soluble polymer is 20000 or more and 200000 or less; and a glass transition temperature of the water-soluble polymer is 200° C. or more.