Aqueous resin based inkjet inks

Patent metadata

Field	Value
Publication number	US-9920211-B2
Application number	US-201515303611-A
Country	US
Kind code	B2
Filing date	Apr 13, 2015
Priority date	Apr 15, 2014
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

An inkjet ink includes a) an aqueous medium; and b) capsules composed of a polymeric shell surrounding a core; wherein the capsules are dispersed in the aqueous medium using a dispersing group covalently bonded to the polymeric shell; the dispersing group is selected from the group consisting of a carboxylic acid or salt thereof, a sulfonic acid or salt thereof, a phosphoric acid ester or salt thereof, a phosphonic acid or salt thereof, an ammonium group, a sulfonium group, and a phosphonium group; the core contains one or more chemical reactants capable of forming a reaction product upon application of heat and/or light; and the capsules have an average particle size of no more than 4 μm as determined by dynamic laser diffraction.

First claim

The invention claimed is:

1. An inkjet ink comprising:
an aqueous medium; and
capsules including a polymeric shell surrounding a core; wherein
the capsules are dispersed in the aqueous medium including a dispersing group covalently bonded to the polymeric shell;
the dispersing group is selected from the group consisting of a carboxylic acid or salt thereof, a sulfonic acid or salt thereof, a phosphoric acid ester or salt thereof, a phosphonic acid or salt thereof, an ammonium group, a sulfonium group, and a phosphonium group;
the core includes one or more chemical reactants that form a reaction product upon application of heat, and the one or more chemical reactants includes a thermally curable compound; and
the capsules have an average particle size of no more than 4 μm as determined by dynamic laser diffraction.

2. The inkjet ink according to claim 1 , wherein the dispersing group is a carboxylic acid or salt thereof.

3. An inkjet printing method comprising the steps of:
jetting an inkjet ink according to claim 2 on a substrate; and
applying heat to the inkjet ink jetted on the substrate to form a reaction product from the one or more chemical reactants in the capsules.

4. The inkjet printing method according to claim 3 , wherein the substrate is a textile, leather, glass, pharmaceutical packaging, or food packaging.

5. The inkjet ink according to claim 1 , wherein the polymeric shell includes a polymer selected from the group consisting of a polyamide, a melamine based polymer, a poly(urea-urethane) polymer, and copolymers thereof.

6. The inkjet ink according to claim 1 , wherein the thermally curable compound is a blocked isocyanate.

7. The inkjet ink according to claim 6 , further comprising an optothermal converting agent.

8. The inkjet ink according to claim 7 , wherein the optothermal converting agent includes an infrared dye.

9. The inkjet ink according to claim 6 , wherein the aqueous medium includes a polymeric latex particle.

10. The inkjet ink according to claim 6 , further comprising a colorant.

11. The inkjet ink according to claim 1 , further comprising an optothermal converting agent.

12. The inkjet ink according to claim 11 , wherein the optothermal converting agent includes an infrared dye.

13. The inkjet ink according to claim 1 , further comprising a colorant.

14. The inkjet ink according to claim 1 , wherein the aqueous medium includes a polymeric latex particle.

15. The inkjet ink according to claim 1 , wherein the polymeric shell is crosslinked.

Assignees

• Agfa Nv

Inventors

• Loccufier Johan
• Decoster Luc

Classifications

• C09D175/04

  Polyurethanes · CPC title

• B41M7/0081

  using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams · CPC title

• C09D11/104

  Polyesters · CPC title

• C09B67/0097

  Dye preparations of special physical nature; Tablets, films, extrusion, microcapsules, sheets, pads, bags with dyes · CPC title

• C09D11/102

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