US 12,391,781 B2
Black particles, black coating material, coating film, and black matrix for color filters
Masahiro Ishii, Osaka (JP); Ren-de Sun, Osaka (JP); and Hiroji Fukui, Osaka (JP)
Assigned to SEKISUI CHEMICAL CO., LTD., Osaka (JP)
Appl. No. 17/775,684
Filed by SEKISUI CHEMICAL CO., LTD., Osaka (JP)
PCT Filed Nov. 17, 2020, PCT No. PCT/JP2020/042775
§ 371(c)(1), (2) Date May 10, 2022,
PCT Pub. No. WO2021/100699, PCT Pub. Date May 27, 2021.
Claims priority of application No. 2019-208048 (JP), filed on Nov. 18, 2019.
Prior Publication US 2022/0411553 A1, Dec. 29, 2022
Int. Cl. C08F 232/08 (2006.01); C08F 234/00 (2006.01); C09D 5/03 (2006.01); C09D 201/02 (2006.01); C09D 201/06 (2006.01)
CPC C08F 232/08 (2013.01) [C08F 234/00 (2013.01); C09D 5/032 (2013.01); C09D 201/025 (2013.01); C09D 201/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. Black particles comprising
a copolymer including a structural unit derived from a pyrrole compound and a structural unit derived from a quinone compound,
the copolymer having a condensed aromatic ring structure formed by a ring of the pyrrole compound with a ring of the quinone compound,
the copolymer having a weight average molecular weight of 1×106 or more and 1×1015 or less,
the black particles having an aqueous dispersion number average particle size of 100 nm or less, an average sphericity of 90% or higher, and a zeta potential of −5 mV or less.