Granted Patent B2

US 12,611,874 · App. 18/485,695 · Granted Apr 28, 2026

Inventors: Mikito Nakajima (Ina, JP); Keitaro Nakano (Matsumoto, JP); Mitsuaki Yoshizawa (Minowa-machi, JP)

Assignee: Seiko Epson Corporation

B41J11/00214B41J2/01B41J2/2107B41J11/00B41J11/00218B41M5/00B41M7/0081C09D11/101C09D11/30C09D11/322C09D11/40

Abstract

Claims (17)

1 . An ultraviolet curable ink jet ink comprising:

vinyl ether group-containing (meth)acrylate ester(s) expressed by the following General Formula (I), and

other monofunctional (meth)acrylate other than the vinyl ether group-containing (meth)acrylate ester(s) expressed by General Formula (I), wherein

the other monofunctional (meth)acrylate contains one or more of monofunctional (meth)acrylate having an aromatic ring skeleton, and

the monofunctional (meth)acrylate having an aromatic ring skeleton contains benzyl (meth)acrylate, wherein a content of the benzyl (meth)acrylate is 5 to 50% by mass with respect to a total content of the ultraviolet curable ink jet ink;

CH2=CR1-COOR2-O—CH═CH—R3  (I)

(in the formula, R1 represents a hydrogen atom or a methyl group, R2 represents a divalent organic residue having 2 to 20 carbon atoms, and R3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms).

2 . The ultraviolet curable ink jet ink according to claim 1 , wherein a content of the vinyl ether group-containing (meth)acrylate esters expressed by the General Formula (I) is 35% by mass or less with respect to a total content of the ultraviolet curable ink jet ink.

3 . The ultraviolet curable ink jet ink according to claim 1 , wherein a content of the vinyl ether group-containing (meth)acrylate esters expressed by the General Formula (I) is 10 to 35% by mass with respect to a total content of the ultraviolet curable ink jet ink.

4 . The ultraviolet curable ink jet ink according to claim 1 , wherein a content of the benzyl (meth)acrylate is 10 to 50% by mass with respect to a total content of the ultraviolet curable ink jet ink.

5 . The ultraviolet curable ink jet ink according to claim 1 , wherein the ultraviolet curable ink jet ink contains a bifunctional or more (meth)acrylate and a content of the bifunctional or more (meth)acrylate is 5 to 40% by mass with respect to a total content of the ultraviolet curable ink jet ink.

6 . The ultraviolet curable ink jet ink according to claim 1 , wherein the ultraviolet curable ink jet ink contains isobornyl (meth)acrylate.

7 . The ultraviolet curable ink jet ink according to claim 1 , wherein the ultraviolet curable ink jet ink contains acyl phosphine oxide compound as a photopolymerization initiator.

8 . The ultraviolet curable ink jet ink according to claim 1 , wherein the ultraviolet curable ink jet ink contains acyl phosphine oxide compound as a photopolymerization initiator, a content of the acyl phosphine oxide compound is 15% by mass or less with respect to a total content of the ultraviolet curable ink jet ink.

9 . The ultraviolet curable ink jet ink according to claim 1 , wherein the ultraviolet curable ink jet ink is used for an ink jet recording method comprising discharging the ultraviolet curable ink jet ink onto a recording medium, and curing the ultraviolet curable ink jet ink which is landed on the recording medium by irradiating the ultraviolet curable ink jet ink with ultraviolet light from an ultraviolet light emitting diode.

10 . An ink jet recording method comprising:

discharging the ultraviolet curable ink jet ink according to claim 1 onto a recording medium, and curing the ultraviolet curable ink jet ink which is landed on the recording medium by irradiating the ultraviolet curable ink jet ink with ultraviolet light from an ultraviolet light emitting diode.

Assignments (1)

Priority Claims (2)

Continuity (6)

References Cited (264)