	US 12,258,482 B2
	Method for storing aqueous white ink composition for inkjet
Yoichi Sato, Osaka (JP); Hirohito Maeda, Osaka (JP); Kazuki Moriyasu, Osaka (JP); Eri Ueda, Osaka (JP); and Takaaki Sano, Osaka (JP)
Assigned to SAKATA INX CORPORATION, Osaka (JP)
Appl. No. 17/997,779
Filed by SAKATA INX CORPORATION, Osaka (JP)
PCT Filed Apr. 30, 2021, PCT No. PCT/JP2021/017144 § 371(c)(1), (2) Date Nov. 2, 2022, PCT Pub. No. WO2021/230099, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 2020-084157 (JP), filed on May 12, 2020.
Prior Publication US 2023/0193060 A1, Jun. 22, 2023
Int. Cl. C09D 11/322 (2014.01); C09D 11/38 (2014.01)

CPC C09D 11/322 (2013.01) [C09D 11/38 (2013.01)]

3 Claims

1. A storing method comprising:

placing an aqueous white ink composition for inkjet containing titanium oxide and a pigment dispersant in a tank; and

maintaining the entire aqueous white ink composition for inkjet in the tank to have a temperature of −5 to −35° C.,

wherein the aqueous white ink composition for inkjet contains resin particles,

wherein the resin particles are contained as at least one selected from a polyurethane resin emulsion, an acrylic-based resin emulsion, a paraffin wax emulsion, a polyethylene wax emulsion, and a polyester-based resin,

wherein the pigment dispersant contains a copolymer of styrene, lauryl acrylate, and acrylic acid.