	US 12,139,624 B2
	Ink for inkjet printers
Takuya Otowa, Tokyo (JP); Hiroshi Sasaki, Tokyo (JP); Tatsunosuke Suzuki, Tokyo (JP); and Masahiko Ogino, Tokyo (JP)
Assigned to Hitachi Industrial Equipment Systems Co., Ltd., Tokyo (JP)
Appl. No. 17/800,135
Filed by Hitachi Industrial Equipment Systems Co., Ltd., Tokyo (JP)
PCT Filed Mar. 16, 2021, PCT No. PCT/JP2021/010675 § 371(c)(1), (2) Date Aug. 16, 2022, PCT Pub. No. WO2021/250967, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 2020-099800 (JP), filed on Jun. 9, 2020.
Prior Publication US 2023/0087688 A1, Mar. 23, 2023
Int. Cl. C09D 11/32 (2014.01); C09D 11/10 (2014.01); C09D 11/328 (2014.01); C09D 11/36 (2014.01)

CPC C09D 11/32 (2013.01) [C09D 11/10 (2013.01); C09D 11/328 (2013.01); C09D 11/36 (2013.01)]

6 Claims

1. An ink for inkjet printers comprising a color material, a solvent, and resin, wherein the color material comprises a first metal complex and a second metal complex that is different from the first metal complex, each of the first metal complex and the second metal complex comprising metal ions and ligands bound thereto, the metal ions constituting the first metal complex are iron ions, the metal ions constituting the second metal complex are selected from manganese ions, cobalt ions, and chromium ions, and the ligands comprise diketone structures incorporated in the chemical structures thereof.