US 12,240,985 B2
Ink for ink-jet printer of charge control type
Hiroshi Sasaki, Tokyo (JP); Takuya Otowa, Tokyo (JP); Masahiko Ogino, Tokyo (JP); Keisuke Nagai, Tokyo (JP); and Tamaki Wada, Tokyo (JP)
Assigned to Hitachi Industrial Equipment Systems Co., Ltd., Tokyo (JP)
Appl. No. 16/967,810
Filed by Hitachi Industrial Equipment Systems Co., Ltd., Tokyo (JP)
PCT Filed Feb. 20, 2019, PCT No. PCT/JP2019/006203
§ 371(c)(1), (2) Date Aug. 6, 2020,
PCT Pub. No. WO2020/003592, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 2018-119455 (JP), filed on Jun. 25, 2018.
Prior Publication US 2020/0385594 A1, Dec. 10, 2020
Int. Cl. C09D 11/38 (2014.01); B41J 2/01 (2006.01); C08K 5/3445 (2006.01); C08K 5/3462 (2006.01); C09D 11/04 (2006.01); C09D 11/101 (2014.01); C09D 11/322 (2014.01); C09D 11/36 (2014.01)
CPC C09D 11/38 (2013.01) [B41J 2/01 (2013.01); C08K 5/3445 (2013.01); C08K 5/3462 (2013.01); C09D 11/04 (2013.01); C09D 11/101 (2013.01); C09D 11/322 (2013.01); C09D 11/36 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An ink to be used for ink-jet of a charge control type, the ink comprising a resin, a pigment, a conductive agent, and a non-aqueous solvent,
wherein the conductive agent has a salt structure that generates an anion and a cation in the non-aqueous solvent, and the conductive agent is present in an amount of 0.5 mass % or less,
wherein the anion is (CF3SO2)3C−,
wherein the cation has an unsaturated heterocyclic structure,
wherein the unsaturated heterocyclic structure is a pyridinium structure,
wherein hydrocarbon groups having a linear or branched structure are bonded to a first position and/or a third position of the pyridinium structure,
wherein a total carbon number of the hydrocarbon groups bonded to the first position and/or the third position is 4 or more and 10 or less, and
wherein the non-aqueous solvent comprises a ketone,
wherein the ink further comprises a resin precursor and a polymerization initiator, wherein the resin precursor has a polymerizable double bond, and wherein the ink is an ink that is cured by being irradiated with UV light.