Black particles, black coating material, coating film, and black matrix for color filters
AssigneeSekisui Chemical Co., Ltd.
InventorsMasahiro Ishii, Ren-de Sun, Hiroji Fukui
Life of this patent
Estimating the term…
Abstract
The present invention provides black particles that have high electrical insulation and that can achieve high blackness in the visible light region, as well as a black coating material, a coating film, and a black matrix for a color filter each containing the black particles. Provided are black particles containing a copolymer including a structural unit derived from a pyrrole compound and a structural unit derived from a quinone compound, the black particles having an aqueous dispersion number average particle size of 100 nm or less and a zeta potential of −5 mV or less.
Claims8
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.
Dependencies are inferred from the claim text.