US 12,187,910 B2
Dispersant composition for electricity storage device electrodes
Akito Itoi, Wakayama (JP); Kazuo Oki, Wakayama (JP); and Kyoichi Shirota, Wakayama (JP)
Assigned to KAO CORPORATION, Tokyo (JP)
Appl. No. 18/031,213
Filed by Kao Corporation, Tokyo (JP)
PCT Filed Oct. 6, 2021, PCT No. PCT/JP2021/036952
§ 371(c)(1), (2) Date Apr. 11, 2023,
PCT Pub. No. WO2022/080206, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 2020-172197 (JP), filed on Oct. 12, 2020.
Prior Publication US 2023/0383135 A1, Nov. 30, 2023
Int. Cl. C09D 133/06 (2006.01); C08F 220/18 (2006.01); C08K 3/04 (2006.01); C08K 5/17 (2006.01); C09D 5/26 (2006.01); C09D 7/20 (2018.01); C09D 7/45 (2018.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01); H01M 4/02 (2006.01); H01M 4/62 (2006.01)
CPC C09D 133/066 (2013.01) [C08F 220/1818 (2020.02); C08K 3/041 (2017.05); C08K 5/17 (2013.01); C09D 5/26 (2013.01); C09D 7/20 (2018.01); C09D 7/45 (2018.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01); H01M 4/625 (2013.01); C08F 2800/20 (2013.01); C08K 2201/001 (2013.01); C08K 2201/011 (2013.01); H01M 2004/028 (2013.01)] 14 Claims
 
1. A dispersant composition for an electrode of a power storage device, comprising:
an acrylic polymer (A);
a compound (B) that is a primary or secondary amine including at least one selected from the group consisting of N-ethylethanolamine, 2-amino-1-propanol, 2-amino-2-methyl-1-propanol, 1-amino-2-propanol, and 2-amino-1,3-propanediol; and
an organic solvent (C),
wherein the acrylic polymer (A) contains a constitutional unit a represented by the following formula (3),
the acrylic polymer (A) further contains at least one constitutional unit b selected from the group consisting of a constitutional unit b1 represented by the following formula (4) and a constitutional unit b2 represented by the following formula (5),
a content of the constitutional unit a represented by the formula (3) in all constitutional units of the acrylic polymer (A) is 10% by mass or more and 80% by mass or less,
a content of the constitutional unit b in all constitutional units of the acrylic polymer (A) is 20% by mass or more and 90% by mass or less; and

OG Complex Work Unit Chemistry
in the formula (3), R7, R8, and R9 are the same or different and represent a hydrogen atom, a methyl group, or an ethyl group, R10 represents a hydrocarbon group having 1 to 30 carbon atoms, and X1 represents an oxygen atom or —NH—;

OG Complex Work Unit Chemistry
in the formula (4), R11, R12, and R13 are the same or different and represent a hydrogen atom, a methyl group, or an ethyl group, X2 represents an oxygen atom, R14 represents a linear or branched alkylene group having 2 to 4 carbon atoms, p represents 1 to 8, and R15 represents a hydrogen atom or a methyl group, and
in the formula (5), R16, R17, and R18 are the same or different and represent a hydrogen atom, a methyl group, or an ethyl group, and X3 represents an amide group or a pyridinyl group that may have a hydrocarbon group having 1 to 4 carbon atoms.