US 12,325,802 B2
Water-based inkjet yellow ink, ink set, and method for producing printed matter
Atsushi Yoda, Tokyo (JP); Kazuhiro Jonai, Tokyo (JP); and Norio Suzuki, Tokyo (JP)
Assigned to artience Co., Ltd., Tokyo (JP); and TOYOCOLOR CO., LTD, Tokyo (JP)
Appl. No. 17/414,500
Filed by artience Co., Ltd., Tokyo (JP); and TOYOCOLOR CO., LTD.
PCT Filed Dec. 16, 2019, PCT No. PCT/JP2019/049201
§ 371(c)(1), (2) Date Jun. 16, 2021,
PCT Pub. No. WO2020/129904, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 2018-235199 (JP), filed on Dec. 17, 2018.
Prior Publication US 2022/0073772 A1, Mar. 10, 2022
Int. Cl. C09D 11/40 (2014.01); C09B 29/20 (2006.01); C09B 57/04 (2006.01); C09D 11/033 (2014.01); C09D 11/037 (2014.01); C09D 11/107 (2014.01); C09D 11/322 (2014.01); B41M 5/00 (2006.01)
CPC C09D 11/40 (2013.01) [C09B 29/20 (2013.01); C09B 57/04 (2013.01); C09D 11/033 (2013.01); C09D 11/037 (2013.01); C09D 11/107 (2013.01); C09D 11/322 (2013.01); B41M 5/0023 (2013.01)] 5 Claims
 
1. A water-based inkjet yellow ink comprising:
a yellow pigment (A) having a partial structure represented by general formula (1), an organic solvent, a basic organic compound, a binder resin, and water, wherein
an amount of the yellow pigment (A) is 1 to 10% by mass of a total mass of the water-based inkjet yellow ink;
the basic organic compound contains 0.1 to 1.25% by mass of a basic organic compound (B) having a pKa value of 9.5 or less at 25° C. of the total mass of the water-based inkjet yellow ink,
an amount of an organic solvent having a boiling point of 240° C. or higher under 1 atmosphere is 5% by mass or less of the total mass of the water-based inkjet yellow ink, and
the binder resin includes olefin resin microparticles, and
if an amine value of the yellow pigment (A) is Am (PA) [mgKOH/g], the amount of the yellow pigment (A) of the total mass of the water-based inkjet yellow ink is C (PA) [% by mass], an acid value of the olefin resin microparticles is Av (RO) [mgKOH/g], and an amount of the olefin resin microparticles of the total mass of the water-based inkjet yellow ink is C (RO) [% by mass], the acid value/amine value ratio represented by formula (8) shown below is 0.5×10−4 to 15×10−4,

OG Complex Work Unit Chemistry
wherein, general formula (1) has at least one bonding site, and
in general formula (1),
X1 and X2 represent both ═O or both ═CR6R7, or X1 is ═O and X2 is ═NR8,
each R1 to R4 independently represents a hydrogen atom or a halogen atom,
R5 represents a hydrogen atom or a bonding site,
each R6 to R8 represents a bonding site, and
Acid value/amine value ratio={Av(RO)×C(RO)}÷{Am(PA)×C(PA)}  formula (8).