Ink composition, inkjet recording method, and colored article

Patent metadata

Field	Value
Publication number	US-10544320-B2
Application number	US-201515323026-A
Country	US
Kind code	B2
Filing date	Jul 16, 2015
Priority date	Jul 18, 2014
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

An ink composition that offers a recorded image having rubfastness and having high quality without causing a mottling phenomenon, an inkjet recording method using the same, and a colored article. The ink composition includes a compound represented by the following formula (1):

a colorant, a dispersant, and a C4-C12 alkanediol, in which the content of the compound represented by formula (1) is 0.1 to 5% by mass. In the formula (1), R 1 represents a hydroxy group or the like, R 2 represents an alkyl group or the like, R 3 represents an alkyl group or the like, R 4 represents a hydrogen atom or the like, and R 5 represents an alkyl group.

First claim

The invention claimed is:

1. An ink composition comprising a compound represented by the following formula (1), a colorant, a dispersant, and a C4-C12 alkanediol,
wherein the content of the compound represented by the following formula (1) is 0.1 to 5% by mass based on the total mass of the ink composition:

wherein the content of the colorant is 2 to 7% by mass based on the total mass of the ink composition,
wherein the content of the dispersant is 0.1 to 0.6 parts by mass relative to 1 part by mass of the colorant,
wherein the content of the C4-C12 alkanediol is 1 to 20% by mass based on the total mass of the ink composition,
wherein the dispersant is selected from the group consisting of a styrene-(meth)acrylic acid copolymer and a polymer composed of benzyl methacrylate, butyl methacrylate, and methacrylic acid,
wherein R 1 represents a hydroxy group, R 2 represents an isopropyl group, R 3 represents a methyl group, R 4 represents a hydrogen atom, and R 5 represents an isopropyl group.

2. The ink composition according to claim 1 , wherein the alkanediol is a C4-C8 alkanediol.

3. An inkjet recording method comprising performing recording by ejecting droplets of the ink composition according to claim 1 in response to recording signals so that the droplets are attached to a recording material.

4. The inkjet recording method according to claim 3 , wherein the recording material is an information transmission sheet.

5. A colored article obtained by coloring with the ink composition according to claim 1 .

6. An inkjet printer equipped with a container comprising the ink composition according to claim 1 .

7. The ink composition according to claim 1 , further comprising a surfactant selected from the group consisting of a nonionic surfactant, a silicone surfactant, and a fluorine surfactant.

8. The ink composition according to claim 7 , wherein the content of the surfactant is more than 0% and less than or equal to 0.5% by mass relative to the total mass of the ink composition.

9. The ink composition according to claim 8 , further comprising propylene glycol, wherein the content of the propylene glycol is 16 to 20% by mass relative to the total mass of the ink composition.

10. The ink composition according to claim 9 , further comprising 2-pyrrolidone.

Assignees

• Nippon Kayaku Kk

Inventors

• Iuchi Maiko
• Kawaguchi Akira

Classifications

• C09D11/38 Primary

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• C09D11/033

  characterised by the solvent · CPC title

• B41M5/50

  Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording {(printing on organic plastics using a printer's form B41M1/30; printing on pre-treated paper with a printer's form B41M1/36)} · CPC title

• B41J2/01

  Ink jet · CPC title

• B41M5/00

  Duplicating or marking methods; Sheet materials for use therein (by using light-sensitive materials G03; electrography, magnetography G03G {; repeatedly usable boards or tablets for writing or drawing B43L1/00}) · CPC title