US 12,146,045 B2
Carbon material dispersion
Hiroyuki Shimanaka, Tokyo (JP); Jun Kamabayashi, Tokyo (JP); Yoshikazu Murakami, Tokyo (JP); Seiji Doi, Tokyo (JP); and Yuzuru Sato, Tokyo (JP)
Assigned to Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo (JP)
Appl. No. 18/551,135
Filed by DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD., Tokyo (JP)
PCT Filed Oct. 22, 2021, PCT No. PCT/JP2021/039164
§ 371(c)(1), (2) Date Sep. 18, 2023,
PCT Pub. No. WO2022/215291, PCT Pub. Date Oct. 13, 2022.
Claims priority of application No. 2021-064841 (JP), filed on Apr. 6, 2021.
Prior Publication US 2024/0191054 A1, Jun. 13, 2024
Int. Cl. C08K 3/04 (2006.01); C08F 220/28 (2006.01); C08F 220/58 (2006.01); C08F 226/08 (2006.01); C09D 133/14 (2006.01); C09D 133/24 (2006.01); C09D 139/08 (2006.01); C09K 23/00 (2022.01)
CPC C08K 3/04 (2013.01) [C08F 220/286 (2020.02); C08F 220/288 (2020.02); C08F 220/58 (2013.01); C08F 226/08 (2013.01); C09D 133/14 (2013.01); C09D 133/24 (2013.01); C09D 139/08 (2013.01); C09K 23/018 (2022.01)] 7 Claims
 
1. An aqueous carbon material dispersion comprising:
a carbon material;
water; and
a polymeric dispersant, wherein the polymeric dispersant is a polymer comprising:
5 to 40% by mass of a constituent unit (1) from a monomer 1 being a quaternary ammonium salt of at least one basic monomer selected from the group consisting of 2-vinylpyridine, 4-vinylpyridine, and 1-vinylimidazole;
50 to 80% by mass of a constituent unit (2) from a monomer 2 represented by the following formula (1); and
0.5 to 40% by mass of a constituent unit (3) from a monomer 3, wherein the monomer 3 is copolymerizable with the monomer 1 and the monomer 2 and is at least one monomer selected from the group consisting of a (meth)acrylic acid-based monomers and a vinyl monomer,
the polymer having a number average molecular weight in a range from 5,000 to 20,000:

OG Complex Work Unit Chemistry
wherein R1 represents a hydrogen atom or a methyl group, A represents O or NH, X represents an ethylene group or a propylene group, Y represents O, NHCOO, or NHCONH, each of R2 mutually independently represents a hydrogen atom or a methyl group, n represents an average number of repeating units in a range from 20 to 100, and R3 represents a hydrogen atom or a methyl group, a number nH of repeating units when R2 is a hydrogen atom, is ½ or more of a total number nT of repeating units in the monomer 2 represented by formula (1).