Aqueous resin based inkjet inks

Patent metadata

Field	Value
Publication number	US-10329440-B2
Application number	US-201515303613-A
Country	US
Kind code	B2
Filing date	Apr 13, 2015
Priority date	Apr 15, 2014
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

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 core contains one or more chemical reactants capable of forming a reaction product upon application of heat and/or infrared light; and the capsules have an average particle size smaller 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 by a dispersing group covalently bonded to the polymeric shell;
the core includes one or more chemical reactants that form a reaction product upon application of heat and/or infrared light; 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 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, a phosphonium group, and a polyethylene oxide group.

3. The inkjet ink according to claim 1 , wherein the one or more chemical reactants includes a thermally curable compound selected from the group consisting of a compound functionalized with at least one functional group selected from the group consisting of an epoxide, an oxetane, an aziridine, an azetidine, a ketone, an aldehyde, a hydrazide, and a blocked isocyanate.

4. The inkjet ink according to claim 3 , wherein the thermally curable compound is a blocked isocyanate.

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

6. The inkjet ink according to claim 4 , further comprising an optothermal converting agent.

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

8. The inkjet ink according to claim 4 , further comprising a colorant.

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

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

11. The inkjet ink according to claim 1 , wherein the aqueous medium includes glycerol.

12. The inkjet ink according to claim 4 , wherein the aqueous medium includes glycerol.

13. An inkjet printing method comprising the steps of:
jetting an inkjet ink according to claim 1 on a substrate; and
applying heat and/or infrared light to the inkjet ink jetted on the substrate to form a reaction product from the one or more chemical reactants in the capsules.

14. An inkjet printing method comprising the steps of:
jetting an inkjet ink according to claim 4 on a substrate; and
applying heat and/or infrared light to the inkjet ink jetted on the substrate to form a reaction product from the one or more chemical reactants in the capsules.

15. The inkjet printing method according to claim 13 , wherein the substrate is a textile, leather, glass, pharmaceutical packaging, or food packaging.

16. The inkjet printing method according to claim 13 , wherein the infrared light is emitted by an infrared radiation source having an emission maximum between 0.8 μm and 1.5 μm.

Assignees

• Agfa Nv

Inventors

• Loccufier Johan
• Decoster Luc

Classifications

• C09D175/04

  Polyurethanes · CPC title

• B01J13/06

  by phase separation · CPC title

• B01J13/16

  Interfacial polymerisation · CPC title

• B41M7/009

  using thermal means, e.g. infrared radiation, heat · CPC title

• C09D11/38

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