Active energy ray-curable inkjet ink, ink container, and inkjet discharging device

Patent metadata

Field	Value
Publication number	US-2016009931-A1
Application number	US-201514858658-A
Country	US
Kind code	A1
Filing date	Sep 18, 2015
Priority date	Nov 14, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

Provided is an active energy ray-curable inkjet ink containing at least photopolymerizable compounds. The photopolymerizable compounds include: at least one monofunctional monomer selected from the group consisting of a monofunctional monomer of which homopolymer has a glass transition temperature of 90° C. or higher, a monofunctional monomer having a ring structure, and a monofunctional monomer of which homopolymer has a glass transition temperature of 90° C. or higher and that has a ring structure; and urethane (meth)acrylate.

First claim

1 - 11 . (canceled)

12 . An active energy ray-curable inkjet ink, comprising:
photopolymerizable compounds, wherein a cured product obtained by discharging the active energy ray-curable inkjet ink onto a base material to form a coated film having an average thickness of 10 μm, and curing the coated film by irradiating it with an active energy ray having a light intensity of 1,500 mJ/cm 2 has stretchability of 100% or greater when the cured product is stretched with a tensile tester at a tension rate of 20 mm/min at a temperature of 180° C., where the stretchability=[(length after tensile test−length before tensile test)/(length before tensile test)]×100, and wherein the cured product has pencil hardness of HB or greater.

13 . The active energy ray-curable inkjet ink according to claim 12 ,
wherein the photopolymerizable compounds comprise: at least one monofunctional monomer selected from the group consisting of acryloyl morpholine, N-vinyl caprolactam, and isobornyl acrylate.

14 . The active energy ray-curable inkjet ink according to claim 12 ,
wherein the photopolymerizable compounds comprise: at least one monofunctional monomer selected from the group consisting of a monofunctional monomer of which homopolymer has a glass transition temperature of 90° C. or higher, a monofunctional monomer having a ring structure, and a monofunctional monomer of which homopolymer has a glass transition temperature of 90° C. or higher and that has a ring structure; and urethane (meth)acrylate.

15 . The active energy ray-curable inkjet ink according to claim 14 ,
wherein the urethane (meth)acrylate has 2 or more unsaturated carbon-carbon bonds and a weight average molecular weight of from 5,000 to 13,000, and wherein the urethane (meth)acrylate is polyester-based urethane (meth)acrylate, polyether-based urethane (meth)acrylate, or polycarbonate-based urethane (meth)acrylate, or any combination thereof.

16 . The active energy ray-curable inkjet ink according to claim 14 ,
wherein the urethane (meth)acrylate is polycarbonate-based urethane (meth)acrylate having 2 or more unsaturated carbon-carbon bonds, and wherein the at least one monofunctional monomer is acryloyl morpholine.

17 . The active energy ray-curable inkjet ink according to claim 12 ,
wherein the active energy ray-curable inkjet ink further comprises: one or more kinds of bifunctional photopolymerizable compounds.

18 . The active energy ray-curable inkjet ink according to claim 12 ,
wherein the active energy ray-curable inkjet ink is solvent-free.

19 . The active energy ray-curable inkjet ink according to claim 12 ,
wherein the active energy ray-curable inkjet ink further comprises: a photopolymerization initiator.

20 . The active energy ray-curable inkjet ink according to claim 12 ,
wherein the active energy ray-curable inkjet ink further comprises: a colorant.

21 . An ink container, comprising:
a container; and the active energy ray-curable inkjet ink according to claim 12 .

22 . An inkjet discharging device, comprising:
an ink container, wherein the ink container comprises: a container; and the active energy ray-curable inkjet ink according to claim 12 .

23 . The inkjet discharging device according to claim 22 ,
wherein the inkjet discharging device further comprises: an ink discharging unit configured to discharge the active energy ray-curable inkjet ink onto a surface of a base material according to an inkjet recording scheme; and a curing unit configured to cure the active energy ray-curable inkjet ink discharged onto the surface of the base material by irradiating it with an active energy ray.

Assignees

• Ricoh Co Ltd

Inventors

• Kohzuki Shizuka
• Yoshino Mie
• Hiraoka Takao

Classifications

• C09D11/101 Primary

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• C09D11/30

  Inkjet printing inks · CPC title

• C09D175/06

  from polyesters · CPC title

• C09D175/08

  from polyethers · CPC title

• C09D11/102

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