US 12,291,641 B2
Metal pigment composition and coloring method
Hiroaki Kida, Shiojiri (JP); Shintaro Asai, Matsumoto (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. 17/586,920.
Claims priority of application No. 2021-013533 (JP), filed on Jan. 29, 2021.
Prior Publication US 2022/0243080 A1, Aug. 4, 2022
Int. Cl. C09D 11/322 (2014.01); C09D 11/102 (2014.01); C09D 11/326 (2014.01); C09D 17/00 (2006.01)
CPC C09D 11/322 (2013.01) [C09D 11/102 (2013.01); C09D 11/326 (2013.01); C09D 17/006 (2013.01)] 13 Claims
 
1. A metal pigment composition which is a coloring composition or a composition to be used for preparation of the coloring composition, the metal pigment composition comprising:
a metal pigment;
a polyoxyalkyleneamine compound; 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 is 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)
(A-R—O)aP(O)(OH)3-a  (1)
(A-R)P(O)(OH)2  (2)
where in the formulas, A represents a hydrogen atom, a carboxy group, a hydroxy group, an amino group, or an oxyalkylene-containing group, R represents a divalent hydrocarbon group having 10 carbon atoms or more, and a represents 1 or 2.