Inkjet pigment ink
Provided is an inkjet pigment ink which contains a pigment that is selected from the group consisting of C.L. Pigment Yellow 74 having a transmittance of 70% or more, C.I. Pigment Red 269 having a transmittance of 70% or more, C.I. Pigment Red 122 having a transmittance of less than 70% and C.I. Pigment Yellow 150; a water-soluble solvent that is selected from the group consisting of glycol ethers and diols; water; and a pigment dispersing resin that is a copolymer which contains a monomer A, a monomer B and a monomer C as unit components. The monomer A is an alkyl (meth)acrylate ester; the monomer B is styrene, α-methyl styrene or benzyl (meth)acrylate; and the monomer C is (meth)acrylic acid.
1. An inkjet pigment ink, comprising:
C.I. Pigment Red 122;
a water-soluble solvent selected from the group consisting of a glycol ether and a diol;
water; and
a pigment dispersing resin which is copolymer consisting essentially of a monomer A, a monomer B, and a monomer C as unit components,
wherein the C.I. Pigment Red 122 is a pigment subject to a hydrophilic treatment and has a transmittance of less than 70%, and
wherein:
the transmittance is a transmittance of an aqueous layer measured by a turbidimeter when a 1.00% by weight pigment is added to water, is shaken, and is left for an hour, and then the aqueous layer is collected, and is measured in a 50 mm angular cell;
the monomer A is an alkyl (meth)acrylate ester having a C18-C24 alkyl group;
the monomer B is styrene, α-methyl styrene, or benzyl (meth)acrylate; and
the monomer C is (meth)acrylic acid.
2. The inkjet pigment ink according to claim 1 , wherein an acid value of the pigment dispersing resin is 50 mgKOH/g or more and 400 mgKOH/g or less.
3. The inkjet pigment ink according to claim 1 , wherein the monomer A is selected from the group consisting of stearyl (meth)acrylate and behenyl (meth)acrylate.
4. The inkjet pigment ink according to claim 1 , wherein the monomer B is styrene.
5. The inkjet pigment ink according to claim 1 , wherein an adsorption rate of a dispersant with respect to the pigment is 10% or more when a dispersing element comprising the pigment, the dispersant and the solvent has a pigment/dispersed resin (non-volatile matter) ratio of 4/1.
6. The inkjet pigment ink according to claim 1 , wherein the glycol ether is selected from the group consisting of a (poly)alkylene glycol monoalkyl ether and a (poly)alkylene glycol dialkyl ether.
7. The inkjet pigment ink according to claim 1 , wherein the diol is selected from a C3-C6 alkanediol.
8. The inkjet pigment ink according to claim 1 , which comprises an aqueous emulsion.
9. An ink set of yellow, magenta, cyan, and black inks, which comprises the inkjet pigment ink according to claim 1 .
10. A printed material, which is printed with the inkjet pigment ink according to claim 1 .
11. An inkjet pigment ink, which comprises:
C.I. Pigment Red 269;
a water-soluble solvent selected from the group consisting of a glycol ether and a diol;
water; and
a pigment dispersing resin being a copolymer consisting essentially of a monomer A, a monomer B, and a monomer C as unit components;
wherein the C.I. Pigment Red 269 has a transmittance of less than 70%, and wherein the transmittance is a transmittance of an aqueous layer measured by a turbidimeter when a 1.00% by weight pigment is added to water, is shaken, and is left for an hour, and then the aqueous layer is collected, and is measured in a 50 mm angular cell, and
the monomer A is an alkyl (meth)acrylate ester having a C18-C24 alkyl group,
the monomer B is styrene, α-methyl styrene, or benzyl (meth)acrylate, and
the monomer C is (meth)acrylic acid.
12. The inkjet pigment ink according to claim 11 , wherein an acid value of the pigment dispersing resin is 50 mgKOH/g or more and 400 mgKOH/g or less.
13. The inkjet pigment ink according to claim 11 , wherein the monomer A is selected from the group consisting of stearyl (meth)acrylate, and behenyl (meth)acrylate.
14. The inkjet pigment ink according to claim 11 , wherein the monomer B is styrene.
15. The inkjet pigment ink according to claim 11 , wherein an adsorption rate of a dispersant with respect to the pigment is 10% or more when a dispersing element comprising the pigment, the dispersant, and the solvent has a pigment/dispersed resin (non-volatile matter) ratio of 7/3.
16. The inkjet pigment ink according to claim 11 , wherein the glycol ethers is selected from the group consisting of a (poly)alkylene glycol monoalkyl ether and a (poly)alkylene glycol dialkyl ether.
17. The inkjet pigment ink according to claim 11 , wherein the diols is selected from a C3-C6 alkanediol.
18. The inkjet pigment ink according to claim 11 , which comprises an aqueous emulsion.
19. An ink set of yellow, magenta, cyan, and black inks, which comprises the inkjet pigment ink according to claim 11 .
20. A printed material, which is printed with the inkjet pigment ink according to claim 11 .