Ink, ink stored container, inkjet recording apparatus, and printed matter

Patent metadata

Field	Value
Publication number	US-2016376455-A1
Application number	US-201615189673-A
Country	US
Kind code	A1
Filing date	Jun 22, 2016
Priority date	Jun 23, 2015
Publication date	Dec 29, 2016
Grant date	—

Abstract

Provided is an ink containing a wax, a plurality of organic solvents, and water, wherein the plurality of organic solvents include a compound having a solubility parameter of 9 or greater but 11 or less and a compound having a saturated vapor pressure at 100° C. of 20 mmHg or greater but 400 mmHg or less.

First claim

What is claimed is:

1 . An ink comprising:
a wax, a plurality of organic solvents; and water, wherein the plurality of organic solvents comprise a compound having a solubility parameter of 9 or greater but 11 or less and a compound having a saturated vapor pressure at 100° C. of 20 mmHg or greater but 400 mmHg or less.

2 . The ink according to claim 1 ,
wherein the compound having a solubility parameter of 9 or greater but 11 or less comprises at least one selected from the group consisting of N,N-dimethyl-β-butoxypropionamide, N,N-dimethyl-β-ethoxypropionamide, and 3-ethyl-3-hydroxymethyloxetane.

3 . The ink according to claim 1 ,
wherein the compound having a saturated vapor pressure at 100° C. of 20 mmHg or greater but 400 mmHg or less comprises at least one selected from the group consisting of propylene glycol monopropylether, propylene glycol monomethylether, and 1,2-propanediol.

4 . The ink according to claim 1 ,
wherein a ratio by mass (A/B) of a content A (% by mass) of the compound having a solubility parameter of 9 or greater but 11 or less to a content B (% by mass) of the compound having a saturated vapor pressure at 100° C. of 20 mmHg or greater but 400 mmHg or less is 0.5 or greater but 5 or less.

5 . The ink according to claim 1 ,
wherein the wax comprises a polyethylene wax.

6 . The ink according to claim 1 ,
wherein a content of the wax is 0.01% by mass or greater but 10% by mass or less.

7 . The ink according to claim 1 ,
wherein a content of the wax is 0.02 parts by mass or greater but 0.34 parts by mass or less when a content of the compound having a solubility parameter of 9 or greater but 11 or less is seen to be 1 part by mass.

8 . The ink according to claim 1 ,
wherein a content of the wax is 0.0025 parts by mass or greater but 1 part by mass or less when a content of the compound having a saturated vapor pressure at 100° C. of 20 mmHg or greater but 400 mmHg or less is seen to be 1 part by mass.

9 . The ink according to claim 1 , further comprising
a surfactant, wherein the surfactant comprises a silicone-based surfactant.

10 . The ink according to claim 1 ,
wherein a viscosity of the ink at 25° C. is 5 mPa·s or greater but 15 mPa·s or less.

11 . The ink according to claim 1 , further comprising
a pigment, wherein the pigment comprises at least one kind of a hydrophilic group over a surface of the pigment and exhibits at least one of water dispersibility and water solubility.

12 . The ink according to claim 11 ,
wherein the pigment is any one of (1) to (3) described below, (1) a pigment dispersed with a dispersant that comprises at least one kind of a hydrophilic group, (2) a pigment coated with a resin that comprises at least one kind of a hydrophilic group, and (3) a pigment bound with at least one kind of a hydrophilic group, bound with a group of atoms that comprise at least one kind of a hydrophilic group, or bound with a resin that comprises at least one kind of a hydrophilic group.

13 . An ink stored container comprising:
an ink; and a container storing the ink, wherein the ink comprises: a wax; a plurality of organic solvents; and water, and wherein the plurality of organic solvents comprise a compound having a solubility parameter of 9 or greater but 11 or less and a compound having a saturated vapor pressure at 100° C. of 20 mmHg or greater but 400 mmHg or less.

14 . An inkjet recording apparatus comprising
the ink stored container according to claim 13 .

15 . A printed matter comprising:
a printing medium; and a printed layer over the printing medium, wherein the printed layer comprises a wax and a plurality of organic solvents, and wherein the plurality of organic solvents comprise a compound having a solubility parameter of 9 or greater but 11 or less and a compound having a saturated vapor pressure at 100° C. of 20 mmHg or greater but 400 mmHg or less.

Assignees

• Katoh Keita
• Goto Hiroshi
• Yokohama Yuuki
• Sakaguchi Hiromi
• Takamura Yukiko

Inventors

• Katoh Keita
• Gotou Hiroshi
• Yokohama Yuuki
• Sakaguchi Hiromi
• Takamura Yukiko

Classifications

• C09D11/322 Primary

  Pigment inks · CPC title

• C09D11/12

  based on waxes or bitumen · CPC title

• B41J2/175

  Ink supply systems {; Circuit parts therefor} · CPC title

• B41J2/1752

  Mounting within the printer · CPC title

• B41J2/01

  Ink jet · CPC title