Active energy ray curing composition, active energy ray curing ink composition, active energy ray curing inkjet ink composition, container, image forming device, image forming method, and cured matter

Patent metadata

Field	Value
Publication number	US-12435233-B2
Application number	US-202217810384-A
Country	US
Kind code	B2
Filing date	Jul 1, 2022
Priority date	Jul 5, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

An active energy ray curing composition can be applied to cured matter of a first active energy ray curing composition. The active energy ray curing composition contains a second active energy ray curing composition containing a monofunctional monomer, a polyfunctional monomer, and a photopolymerization initiator. The proportion of the polyfunctional monomer to the second active energy ray composition is 60 percent by mass or more. The proportion of the polyfunctional monomer modified with the same number of an oxyalkylene group as the number of functional groups of the polyfunctional monomer is 90 percent by mass of the polyfunctional monomer, and the proportion of a tri- or higher polyfunctional monomer is 50 percent by mass or more to the modified polyfunctional monomer.

First claim

The invention claimed is:

1. An image forming method, comprising:
applying a second active energy ray curing composition to a cured matter of a first active energy ray curing composition, the second active energy ray curing composition comprising:
a monofunctional monomer;
a polyfunctional monomer; and
a photopolymerization initiator,

wherein a proportion of the polyfunctional monomer to the second active energy ray composition is 60 percent by mass or more,
wherein a polyfunctional monomer modified with a same number of an oxyalkylene group as a number of functional groups of the polyfunctional monomer accounts for 90 percent by mass or more of the polyfunctional monomer,
wherein a tri- or higher polyfunctional monomer accounts for 50 percent by mass or more of the polyfunctional monomer modified with a same number of an oxyalkylene group, and
wherein the first active energy ray curing composition comprises a monofunctional monomer, a polyfunctional monomer, a photopolymerization initiator, a polyester resin having an unsaturated bond, and at least one of a polymerizable tree-like branched compound or an allophanate-bond-containing compound.

2. The method according to claim 1 , wherein a proportion of the monofunctional monomer of the first active energy ray curing composition to the first active energy ray curing composition is 85 percent by mass or more.

3. The method according to claim 1 , further comprising:
exposing the second active energy ray curing composition to an active energy ray.

4. The method according to claim 1 , wherein the second active energy ray curing composition is contained in a container.

5. The method according to claim 1 , which is performed with an image forming device, the image forming device comprising:
an accommodating unit containing the second active energy ray curing composition; and
an irradiator configured to expose the second active energy ray curing composition to an active energy ray.

6. An image forming method, comprising:
applying a second active energy ray curing composition to a cured matter of a first active energy ray curing composition, the second active energy ray curing composition comprising:
a monofunctional monomer;
a polyfunctional monomer; and
a photopolymerization initiator,

wherein a proportion of the polyfunctional monomer to the second active energy ray composition is 60 percent by mass or more,
wherein a polyfunctional monomer modified with a same number of an oxyalkylene group as a number of functional groups of the polyfunctional monomer accounts for 90 percent by mass or more of the polyfunctional monomer,
wherein a tri- or higher polyfunctional monomer accounts for 50 percent by mass or more of the polyfunctional monomer modified with a same number of an oxyalkylene group, and
wherein a proportion of the monofunctional monomer of the first active energy ray curing composition to the first active energy ray curing composition is 85 percent by mass or more.

7. The method according to claim 6 , wherein the second active energy ray curing composition is contained in a container.

8. The method according to claim 6 , which is performed with an image forming device, the image forming device comprising:
an accommodating unit containing the second active energy ray curing composition; and
an irradiator configured to expose the second active energy ray curing composition to an active energy ray.

Assignees

• Noguchi Soh
• Okada Takashi
• Kobayashi Masahide
• Ricoh Co Ltd

Inventors

• Noguchi Soh
• Okada Takashi
• Kobayashi Masahide

Classifications

• C09D11/107

  from unsaturated acids or derivatives thereof · CPC title

• B41M5/0023

  Digital printing methods characterised by the inks used (inks per se C09D11/00) · CPC title

• B41M7/0081

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

• 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

• C09D11/38 Primary

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