US 12,110,442 B2
Dispersant composition for electrochemical device, conductive material dispersion liquid for electrochemical device, slurry for electrochemical device electrode, electrode for electrochemical device, and electrochemical device
Kazuki Asai, Tokyo (JP)
Assigned to ZEON CORPORATION, Tokyo (JP)
Appl. No. 18/004,304
Filed by ZEON CORPORATION, Tokyo (JP)
PCT Filed Aug. 16, 2021, PCT No. PCT/JP2021/029943
§ 371(c)(1), (2) Date Jan. 5, 2023,
PCT Pub. No. WO2022/044871, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 2020-146309 (JP), filed on Aug. 31, 2020.
Prior Publication US 2023/0303931 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 23/52 (2022.01); C08F 236/12 (2006.01); H01G 11/36 (2013.01); H01G 11/38 (2013.01); H01G 11/86 (2013.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01)
CPC C09K 23/52 (2022.01) [C08F 236/12 (2013.01); H01G 11/36 (2013.01); H01G 11/38 (2013.01); H01G 11/86 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/623 (2013.01); H01M 4/625 (2013.01)] 11 Claims
 
1. A dispersant composition for an electrochemical device comprising a polymer A and a substituted phenol, wherein
the polymer A includes a acrylonitrile monomer unit and an alkylene structural unit derived from 1,3-butadiene, or the polymer A includes the acrylonitrile monomer unit and a 2-ethylhexyl acrylate monomer unit, a styrene monomer unit, and a methacrylic acid monomer unit,
the dispersant composition including the polymer A and the substituted phenol has an intrinsic viscosity of not less than 0.15 dL/g and less than 1.20 dL/g when dissolved in N-methyl-2-pyrrolidone and measured at a temperature of 25° C.,
the polymer A satisfies at least one of the following features I and II:
feature I: proportional content of the acrylonitrile monomer unit in the polymer A is not less than 15 mass % and not more than 50 mass % and proportional content of the alkylene structural units derived from 1,3-butadiene in the polymer A is 40 mass % or more and is 90 mass % or less, when all repeating units in the polymer A are taken to be 100 mass %, and an iodine value of the polymer A is 1 mg/100 mg or more and 60 mg/100 mg or less, and
feature II: proportional content of the acrylonitrile monomer unit in the polymer A is not less than 15 mass % and not more than 50 mass % and a rest of the polymer A is occupied by the 2-ethylhexyl acrylate monomer unit, the styrene monomer unit, and the methacrylic acid monomer unit,
not less than 0.01 mass % and not more than 0.2 mass % of the substituted phenol is included relative to the polymer A.