Active energy ray-curable inkjet ink, and printed matter

Patent metadata

Field	Value
Publication number	US-12540252-B2
Application number	US-202218279516-A
Country	US
Kind code	B2
Filing date	Oct 3, 2022
Priority date	Nov 29, 2021
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

Provided is an active energy ray-curable inkjet ink containing: C. I. Pigment Yellow 150; an active energy ray-polymerizable compound (A-1) including multiple ethylene oxide groups and a specific structure; an acylphosphine oxide initiator (B-1); and a siloxane surfactant (C-1) having a weight-average molecular weight of 400 to 20,000, wherein a total amount of a compound represented by general formula 2 below is 100 ppm or less. In general formula 2, R 2 and R 3 each independently represent an amino group or a hydroxyl group. General formula 2:

First claim

The invention claimed is:

1 . An active energy ray-curable inkjet ink comprising: C. I. Pigment Yellow 150; an active energy ray-polymerizable compound (A); a photopolymerization initiator (B); and a surfactant (C), wherein
the active energy ray-polymerizable compound (A) contains a compound (A-1) represented by general formula 1, the photopolymerization initiator (B) contains an acylphosphine oxide initiator (B-1), the surfactant (C) contains a siloxane surfactant (C-1) having a weight-average molecular weight of 400 to 20,000, the active energy ray-curable inkjet ink contains or does not contain a monofunctional monomer, and when the active energy ray-curable inkjet ink contains the monofunctional monomer, a total amount of 85% by mass or less relative to a total amount of the compound (A-1), and a total amount of a compound represented by general formula 2 below contained in the active energy ray-curable inkjet ink is 100 ppm or less,
CH 2 ═CH—CO—(O—CH 2 CH 2 ) n —O—R 1   General formula 1

wherein, R 1 represents an acryloyl group or a vinyl group, and n represents an integer of 2 to 10, General formula 2:

wherein, R 2 and R 3 each independently represent an amino group or a hydroxyl group.

2 . The active energy ray-curable inkjet ink according to claim 1 , wherein the active energy ray-polymerizable compound (A) further contains a compound (A-2) selected from the group consisting of polypropylene glycol di(meth)acrylate and alkanediol di(meth)acrylate.

3 . The active energy ray-curable inkjet ink according to claim 1 , wherein an amount of the compound (A-1) represented by general formula 1 is 10 to 90% by mass of a total amount of the active energy ray-curable inkjet ink.

4 . The active energy ray-curable inkjet ink according to claim 2 , wherein an amount of the compound (A-1) represented by general formula 1 is 10 to 90% by mass of a total amount of the active energy ray-curable inkjet ink.

5 . A printed matter obtained using the active energy ray-curable inkjet ink according to claim 1 .

Assignees

• Artience Co Ltd
• Toyocolor Co Ltd

Inventors

• Yoshikawa Takumi
• Kikutsuji Gosuke

Classifications

• C09D11/38

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

• C09D11/32

  characterised by colouring agents · 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

• B41M5/00

  Duplicating or marking methods; Sheet materials for use therein (by using light-sensitive materials G03; electrography, magnetography G03G {; repeatedly usable boards or tablets for writing or drawing B43L1/00}) · CPC title

• B41J2/2107

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