US 12,435,235 B2
Aqueous inkjet ink and printed matter
Kazushi Sunaoshi, Tokyo (JP); Takanori Nomura, Tokyo (JP); and Riho Morita, Tokyo (JP)
Assigned to Artience Co., Ltd., Tokyo (JP); and TOYOCOLOR CO., LTD., Tokyo (JP)
Appl. No. 18/879,576
Filed by artience Co., Ltd., Tokyo (JP); and TOYOCOLOR CO., LTD., Tokyo (JP)
PCT Filed Mar. 28, 2024, PCT No. PCT/JP2024/012837
§ 371(c)(1), (2) Date Dec. 27, 2024,
PCT Pub. No. WO2025/109774, PCT Pub. Date May 30, 2025.
Claims priority of application No. 2023-198145 (JP), filed on Nov. 22, 2023.
Prior Publication US 2025/0257232 A1, Aug. 14, 2025
Int. Cl. C09D 11/38 (2014.01); C09D 11/033 (2014.01)
CPC C09D 11/38 (2013.01) [C09D 11/033 (2013.01)] 6 Claims
 
1. An aqueous inkjet ink comprising a pigment, a binder resin, a water-soluble organic solvent, and an acetylene diol-based surfactant (A), wherein
the acetylene diol-based surfactant (A) contains an unmodified acetylene diol-based surfactant (A1) and an alkylene oxide-modified acetylene diol-based surfactant (A2) having an HLB value of 4 to 10,
a content of the unmodified acetylene diol-based surfactant (A1) is 5 to 2,000 ppm with respect to a total amount of the aqueous inkjet ink,
a content of the alkylene oxide-modified acetylene diol-based surfactant (A2) is 0.2 to 5% by mass with respect to the total amount of the aqueous inkjet ink, and
a ratio between the content of the unmodified acetylene diol-based surfactant (A1) and the content of the alkylene oxide-modified acetylene diol-based surfactant (A2) [surfactant (A2)/surfactant (A1)] is within a range of 10 to 5,000.