Pigment dispersion and paint
AssigneeNippon Point Co., Ltd.
InventorsHifumi Egusa, Shinji Shimada, Nobuhisa Sudo, Takashi Koizumi, Makiko Nanke
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Abstract
A first pigment made of a coloring pigment having a primary average particle diameter of 200 nm or smaller or, or made of carbon black having an average particle diameter of a structure of 100 nm or smaller, and a second pigment made of barium sulfate having a primary average particle diameter of 55 nm or smaller are combined so that a value of (acid amount-base amount) of one pigment becomes positive, and a value of (acid amount-base amount) of other pigment becomes negative, and the combined first and second pigments are dispersed in a medium in the presence of a pigment dispersant.
Claims15
A pigment dispersion comprising a first pigment made of a coloring pigment having a primary average particle diameter of 200 nm or smaller, or made of carbon black having an average particle diameter of a structure of 100 nm or smaller, and a second pigment made of barium sulfate having a primary average particle diameter of 55 nm or smaller, said first pigment and said second pigment being combined so that a value of (acid amount-base amount) of one pigment becomes positive, and a value of (acid amount-base amount) of other pigment becomes negative, and the combined first and second pigments being dispersed in a medium in the presence of a pigment dispersant.
Dependencies are inferred from the claim text.