Photocurable ink composition, recording method, recording apparatus, photocurable ink jet recording ink composition, and ink jet recording method
A photocurable ink composition includes polymerizable compounds and a photopolymerization initiator. The polymerizable compounds include vinyl ether group-containing (meth)acrylic esters represented by the following Formula (I): CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3 (I) (wherein, R 1 represents a hydrogen atom or a methyl group; R 2 represents a divalent organic residue having 2 to 20 carbon atoms; and R 3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms), dipropylene glycol di(meth)acrylate, and monofunctional (meth)acrylate having an aromatic ring skeleton. The ink composition includes a coloring material.
1. A photocurable ink composition comprising polymerizable compounds and a photopolymerization initiator, wherein
the polymerizable compounds include:
vinyl ether group-containing (meth)acrylic esters represented by the following Formula (I):
CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3 (I)
(wherein, R 1 represents a hydrogen atom or a methyl group; R 2 represents a divalent organic residue having 2 to 20 carbon atoms; and R 3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms);
dipropylene glycol di(meth)acrylate; and
monofunctional (meth)acrylate having an aromatic ring skeleton,
the ink composition includes a coloring material,
wherein the content of the monofunctional (meth)acrylate having an aromatic ring skeleton is 10 to 60% by mass based on the total mass of the ink composition,
wherein the content of the dipropylene glycol di(meth)acrylate is in the range of 3 to 20% by mass based on the total mass of the ink composition,
wherein the photopolymerization initiator is an acylphosphine oxide compound and is contained in an amount between 7 and 15% by mass based on the total mass of the ink composition, and
wherein the content of the vinyl ether group-containing (meth)acrylic esters is in the range of 5 to 65% by mass based on the total mass of the ink composition.
2. The photocurable ink composition according to claim 1 , wherein the content of the dipropylene glycol di(meth)acrylate is 5 to 25% by mass based on the total mass of the ink composition.
3. The photocurable ink composition according to claim 1 , wherein the content of the vinyl ether group-containing (meth)acrylic esters is 10 to 30% by mass based on the total mass of the ink composition.
4. The photocurable ink composition according to claim 1 , wherein the photopolymerization initiator is an acylphosphine oxide compound and is contained in an amount of 9 to 15% by mass based on the total mass of the ink composition.
5. The photocurable ink composition according to claim 1 , wherein the ink composition is allowed to adhere to a recording medium and is cured by irradiation with light from an ultraviolet light-emitting diode having an emission peak wavelength in a range of 350 to 420 nm.
6. The photocurable ink composition according to claim 1 , wherein the ink composition is curable by irradiation with an energy of 300 mJ/cm 2 or less from an ultraviolet light-emitting diode having an emission peak wavelength in a range of 350 to 420 nm.
7. The photocurable ink composition according to claim 1 , wherein the vinyl ether group-containing (meth)acrylic esters are 2-(vinyloxyethoxy)ethyl acrylate.
8. An ink jet recording method comprising:
allowing the photocurable ink composition according to claim 1 to adhere to a recording medium; and
curing the adhering ink composition by irradiation with light from an ultraviolet light-emitting diode having an emission peak wavelength in a range of 350 to 420 nm.
9. An ink jet recording apparatus for allowing the photocurable ink composition according to claim 1 to adhere to a recording medium and curing the adhering ink composition by irradiation with light from an ultraviolet light-emitting diode having an emission peak wavelength in a range of 350 to 420 nm.
10. The photocurable ink composition according to claim 1 , wherein the content of the vinyl ether group containing (meth)acrylic esters is 10 to 40% based on the total mass of the ink composition.