Ink for inkjet recording and recording method therewith

Patent metadata

Field	Value
Publication number	US-9574098-B2
Application number	US-201414758374-A
Country	US
Kind code	B2
Filing date	Jan 27, 2014
Priority date	Jan 29, 2013
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

An ink for inkjet recording, including: water; a water-soluble organic solvent; a pigment; and resin particles, wherein 50% by mass or more of the water-soluble organic solvent is a water-soluble organic solvent having a boiling point of lower than 200° C., and the water-soluble organic solvent having a boiling point of lower than 200° C. comprises 3-methoxy-3-methyl-1-butanol.

First claim

The invention claimed is:

1. An ink, comprising:
water;
a water-soluble organic solvent;
a pigment; and
resin particles,
wherein 50% by mass or more of the water-soluble organic solvent is a water-soluble organic solvent having a boiling point of lower than 200° C.,
the water-soluble organic solvent having a boiling point of lower than 200° C. comprises 3-methoxy-3-methyl-1-butanol, and
wherein 50% by mass or more of the resin particles is composed of a polycarbonate-based urethane resin.

2. The ink according to claim 1 , wherein the ink is applied on a non-porous substrate heated, by an inkjet method.

3. The ink according to claim 1 , wherein the water-soluble organic solvent having a boiling point of lower than 200° C. comprises propylene glycol or 2,3-butanediol, or both thereof.

4. The ink according to claim 1 , wherein the water-soluble organic solvent is free of a water-soluble organic solvent having a boiling point of higher than 250° C.

5. The ink according to claim 1 , wherein the resin particles are polycarbonate-based urethane resin particles.

6. The ink according to claim 5 , wherein the polycarbonate-based urethane resin particles have a structure derived from at least one alicyclic diisocyanate.

7. The ink according to claim 1 , wherein the pigment is a modified pigment modified by a geminal bis-phosphoric acid group or a geminal bis-phosphonic acid salt group, or both thereof.

8. The ink according to claim 7 , wherein the modified pigment is one modified by at least one group selected from groups represented by the following formulae (1) to (4):

and

wherein X + represents Li + , K + , Na + , NH 4 + , N(CH 3 ) 4 + , N(C 2 H 5 ) 4 + , N(C 3 H 7 ) 4 + , or N(C 4 H 9 ) 4 + .

9. The ink according to claim 1 , wherein the organic solvent comprises 10% by mass to 15% by mass of the 3-methoxy-3-methyl-1-butanol.

10. The ink according to claim 1 , wherein the ink contains 0.5% by mass to 10% by mass of the resin particles in terms of solid content.

11. An inkjet recording method, comprising:
heating a non-porous substrate; and
allowing an ink to be ejected on the non-porous substrate for printing,
wherein the ink comprises:
water;
a water-soluble organic solvent;
a pigment; and
resin particles,

wherein 50% by mass or more of the water-soluble organic solvent is a water-soluble organic solvent having a boiling point of lower than 200° C., and the water-soluble organic solvent having a boiling point of lower than 200° C. comprises 3-methoxy-3-methyl-1-butanol, and
wherein 50% by mass or more of the resin particles is composed of a polycarbonate-based urethane resin.

12. The inkjet recording method of claim 11 , wherein the organic solvent comprises 10% by mass to 15% by mass of the 3-methoxy-3-methyl-1-butanol.

13. The inkjet recording method of claim 11 , wherein the ink contains 0.5% by mass to 10% by mass of the resin particles in terms of solid content.

14. An ink cartridge, comprising:
a container; and
an ink, which is housed in the container,
wherein the ink comprises:
water;
a water-soluble organic solvent;
a pigment; and
resin particles, and

wherein
50% by mass or more of the water-soluble organic solvent is a water-soluble organic solvent having a boiling point of lower than 200° C.,
the water-soluble organic solvent having a boiling point of lower than 200° C. comprises 3-methoxy-3-methyl-1-butanol, and
wherein 50% by mass or more of the resin particles is composed of a polycarbonate-based urethane resin.

15. The ink cartridge of claim 14 , wherein the organic solvent comprises 10% by mass to 15% by mass of the 3-methoxy-3-methyl-1-butanol.

16. The ink cartridge of claim 14 , wherein the ink contains 0.5% by mass to 10% by mass of the resin particles in terms of solid content.

Assignees

• Fujii Ichiroh
• Toda Naohiro
• Nakagawa Tomohiro
• Nagashima Hidefumi
• Ricoh Co Ltd

Inventors

• Fujii Ichiroh
• Toda Naohiro
• Nakagawa Tomohiro
• Nagashima Hidefumi

Classifications

• C09D11/38

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

• C09D11/322 Primary

  Pigment inks · CPC title

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title

• B41J2/2107

  characterised by the ink properties (supplying ink in a solid state B41J2/17593) · CPC title

• B41J11/002

  Curing or drying the ink on the copy materials, e.g. by heating or irradiating · CPC title