Radiation-curable ink jet composition and ink jet recording method
A radiation-curable ink jet composition contains monomer A represented by formula (1), a mono-, bi-, or trifunctional urethane (meth)acrylate oligomer, and an N-vinyl compound: CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3 (1) where R 1 denotes —H or —CH 3 , R 2 denotes an organic residue having 2 to 20 carbon atoms, and R 3 denotes a hydrogen atom or an organic residue having 1 to 11 carbon atoms.
1. A radiation-curable ink jet composition comprising:
p-methoxyphenol as a polymerization inhibitor;
monomer A represented by formula (1), a mono-, bi-, or trifunctional urethane (meth)acrylate oligomer, and an N-vinyl compound:
CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3 (1)
where R 1 denotes —H or —CH 3 , R 2 denotes an organic residue having 2 to 20 carbon atoms, and R 3 denotes a hydrogen atom or an organic residue having 1 to 11 carbon atoms, and
wherein a content of the N-vinyl compound is in the range of 5-15% by mass of a total mass of the radiation-curable ink jet composition.
2. The radiation-curable ink jet composition according to claim 1 , wherein:
the N-vinyl compound is N-vinylcaprolactam; and
the ink jet composition contains at least one cyclic monofunctional (meth)acrylate monomer, the at least one cyclic monofunctional (meth)acrylate monomer representing 15% by mass or more and 50% by mass or less of the total mass of the ink jet composition.
3. The radiation-curable ink jet composition according to claim 1 , wherein the monomer A represents 13% by mass or more of a total mass of the ink jet composition.
4. The radiation-curable ink jet composition according to claim 2 , wherein the at least one cyclic monofunctional (meth)acrylate monomer includes at least one of phenoxyethyl (meth)acrylate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, and benzyl (meth)acrylate.
5. The radiation-curable ink jet composition according to claim 2 , wherein the at least one cyclic monofunctional (meth)acrylate monomer includes at least one of isobornyl (meth)acrylate and dicyclopentanyl (meth)acrylate.
6. The radiation-curable ink jet composition according to claim 1 , wherein the monomer A is 2-(2-vinyloxyethoxy)ethyl acrylate.
7. The radiation-curable ink jet composition according to claim 1 , further comprising:
an acylphosphine oxide photopolymerization initiator, the acylphosphine oxide photopolymerization initiator representing 3% by mass or more and 15% by mass or less of a total mass of the ink jet composition.
8. The radiation-curable ink jet composition according to claim 1 , wherein the ink jet composition is cured with light from an ultraviolet-light emitting diode having a peak emission wavelength of 365 nm to 405 nm.
9. An ink jet recording method comprising irradiating a radiation-curable ink jet composition according to claim 1 with ultraviolet radiation on a recording medium.
10. An ink jet recording method comprising irradiating a radiation-curable ink jet composition according to claim 2 with ultraviolet radiation on a recording medium.
11. An ink jet recording method comprising irradiating a radiation-curable ink jet composition according to claim 3 with ultraviolet radiation on a recording medium.
12. An ink jet recording method comprising irradiating a radiation-curable ink jet composition according to claim 4 with ultraviolet radiation on a recording medium.
13. An ink jet recording method comprising irradiating a radiation-curable ink jet composition according to claim 5 with ultraviolet radiation on a recording medium.
14. An ink jet recording method comprising irradiating a radiation-curable ink jet composition according to claim 6 with ultraviolet radiation on a recording medium.
15. An ink jet recording method comprising irradiating a radiation-curable ink jet composition according to claim 7 with ultraviolet radiation on a recording medium.
16. An ink jet recording method comprising irradiating a radiation-curable ink jet composition according to claim 8 with ultraviolet radiation on a recording medium.
17. The radiation-curable ink jet composition according to claim 1 , further comprising a saturated alicyclic monofunctional (meth)acrylic monomer, wherein a content of the saturated alicyclic monofunctional (meth)acrylic monomer is in the range of 3-30% by mass of the total mass of the radiation-curable ink jet composition.
18. A radiation-curable ink jet composition comprising:
a monomer A represented by CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3 , where R 1 denotes —H or —CH 3 , R 2 denotes an organic residue having 2 to 20 carbon atoms, and R 3 denotes a hydrogen atom or an organic residue having 1 to 11 carbon atoms;
a mono-, bi-, or trifunctional urethane (meth)acrylate oligomer;
an N-vinyl compound; and
at least one cyclic monofunctional (meth)acrylate monomer,
wherein a content of the N-vinyl compound is in the range of 5-15% by mass of a total mass of the radiation-curable ink jet composition, and
wherein a total content of the N-vinyl compound, the mono-, bi-, or trifunctional urethane (meth)acrylate oligomer, and the cyclic monofunctional (meth)acrylate monomer is 55.75% by mass or more.
19. The radiation-curable ink jet composition according to claim 18 , further comprising p-methoxyphenol as a polymerization inhibitor.