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:
Apr. 28, 2026
Filed:
Jul. 30, 2021
Eneos Materials Corporation, Minato-ku, JP;
Takuya Nakayama, Minato-ku, JP;
Kana Masuda, Minato-ku, JP;
Sadatoshi Heiguchi, Minato-ku, JP;
Yingcheng Lin, Minato-ku, JP;
ENEOS Materials Corporation, Minato-ku, JP;
Abstract
A binder composition for an electrical storage device includes a polymer (A) and a liquid medium (B), where with respect to 100 mass % in total of repeating units contained in the polymer (A), the polymer (A) contains 15 mass % to 60 mass % of a repeating unit (a1) derived from a conjugated diene compound and 1 mass % to 10 mass % of a repeating unit (a2) derived from an unsaturated carboxylic acid. In the binder composition, the following characteristics are satisfied: tan δ (loss elastic modulus/storage elastic modulus) in dynamic viscoelasticity of the polymer (A) has one peak top in a range of from −40° C. to less than 50° C. (tan δ(Tp1)), and has one peak top in a range of from 50° C. to 150° C. (tan δ(Tp2)), and the following relationship is satisfied tan δ(Tp2)/tan δ(Tp1)≥0.5.