公开(公告)号：US20230331976A1

公开(公告)日：2023-10-19

申请号：US18245343

申请日：2021-09-30

Applicant: ZEON CORPORATION

Inventor： Akihiro SHINTANI

IPC: C08L55/02 ,  H01M4/62

CPC classification number: C08L55/02 ,  H01M4/622 ,  C08L2207/32 ,  C08L2201/08

Abstract: Provided is a binder product for a secondary battery that has a low tendency for aggregation to occur in a binder composition and enables formation of a functional layer having excellent adhesiveness using the binder composition even after long-term storage. The binder product includes a container having an accommodating part and a binder composition accommodated in an internal space of the accommodating part. An inner wall surface of the accommodating part has a contact angle with water of 80° or more. The binder composition contains a binder, a defoamer, and water and has a content of the defoamer of not less than 0.02 parts by mass and not more than 0.3 parts by mass per 100 parts by mass of the binder. The binder composition has a surface tension of not less than 20 mN/m and not more than 60 mN/m.

公开(公告)号：US20250006936A1

公开(公告)日：2025-01-02

申请号：US18696358

申请日：2022-10-20

Applicant: ZEON CORPORATION

Inventor： Akihiro SHINTANI

IPC: H01M4/62 ,  H01M4/133 ,  H01M4/583

Abstract: Provided is a binder composition for a non-aqueous secondary battery electrode with which it is possible to produce a slurry composition that has excellent viscosity stability and is capable of producing an electrode having excellent peel strength. The binder composition contains a particulate polymer and water. The particulate polymer includes an aromatic vinyl monomer unit, a conjugated diene monomer unit, and an acidic group-containing monomer unit, wherein an acidic group of the acidic group-containing monomer unit is at least partially in a form of a salt. The particulate polymer has an average particle diameter X according to cumulant method analysis as measured by dynamic light scattering of 140 nm to 300 nm. A particle diameter ratio X/Y calculated as a ratio of the average particle diameter X relative to a volume-average particle diameter Y of the particulate polymer measured by laser diffraction/scattering is 1.05 to 2.00.