	US 12,264,250 B2
	Coloring composition and coloring method
Shintaro Asai, Matsumoto (JP); Hiroaki Kida, Shiojiri (JP); Kei Hiruma, Chino (JP); Tomoyuki Ushiyama, Chino (JP); Mitsunobu Nakatani, Shiojiri (JP); and Kenta Tsukada, Shiojiri (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Jan. 28, 2022, as Appl. No. 17/586,934.
Claims priority of application No. 2021-012859 (JP), filed on Jan. 29, 2021.
Prior Publication US 2022/0243081 A1, Aug. 4, 2022
Int. Cl. C09D 11/322 (2014.01); B41J 2/01 (2006.01); B41J 2/21 (2006.01); C09D 11/107 (2014.01); C09D 11/36 (2014.01)

CPC C09D 11/322 (2013.01) [B41J 2/01 (2013.01); B41J 2/2107 (2013.01); C09D 11/107 (2013.01); C09D 11/36 (2013.01)]

14 Claims

1. A coloring composition comprising:

a metal pigment;

an acrylic-based resin having an acid value of 200 mgKOH/g or less; and

a liquid medium component,

wherein the metal pigment includes metal particles,

the metal particles are surface-modified with a surface treatment agent, and

the surface treatment agent includes at least one selected from the group consisting of a compound represented by the following formula (1) and a compound represented by the following formula (2)

(RO)_aP(O)(OH)_3-a (1)

(R)P(O)(OH)₂ (2)

where in the formulas, R represents a hydrocarbon group having one carbon atom or more, and a represents 1 or 2.