Radiation-curable ink jet composition and ink jet method
A radiation-curable ink jet composition includes vinyl methyl oxazolidinone and a vinyl ether group-containing (meth)acrylate represented by the following formula (1): H 2 C═CR 1 —CO—OR 2 —O—CH═CH—R 3 (where, R 1 is a hydrogen atom or a methyl group, R 2 is a divalent C2-C20 organic residue, and R 3 is a hydrogen atom or a monovalent C1-C11 organic residue).
1. A radiation-curable ink jet composition comprising:
vinyl methyl oxazolidinone; and
a vinyl ether group-containing (meth)acrylate represented by the following formula (I):
H 2 C═CR 1 —CO—OR 2 —O—CH═CH—R 3
where, R 1 is a hydrogen atom or a methyl group, R 2 is a divalent C2-C20 organic residue, and R 3 is a hydrogen atom or a monovalent C1-C11 organic residue.
2. The radiation-curable ink jet composition according to claim 1 , wherein
a content of the vinyl methyl oxazolidinone is 10 to 40 mass % based on total amount of the radiation-curable ink jet composition.
3. The radiation-curable ink jet composition according to claim 1 , wherein
a content of the vinyl ether group-containing (meth)acrylate is 10 to 50 mass % based on total amount of the radiation-curable ink jet composition.
4. The radiation-curable ink jet composition according to claim 1 , comprising:
an aromatic group-containing monofunctional monomer.
5. The radiation-curable ink jet composition according to claim 1 , comprising:
a multifunctional (meth)acrylate.
6. The radiation-curable ink jet composition according to claim 1 , comprising:
a urethane acrylate oligomer.
7. The radiation-curable ink jet composition according to claim 1 , comprising:
an acylphosphine oxide-based polymerization initiator as a photopolymerization initiator.
8. The radiation-curable ink jet composition according to claim 1 , comprising:
2,2,6,6-tetramethylpiperidinyl-1-oxyl or a derivative thereof as a polymerization inhibitor.
9. The radiation-curable ink jet composition according to claim 1 , comprising:
a fluorescent whitener.
10. An ink jet method comprising:
a discharging step of discharging the radiation-curable ink jet composition according to claim 1 by a liquid jet head to adhere the composition to a recording medium; and
an irradiation step irradiating the radiation-curable ink jet composition adhered to the recording medium with radioactive rays.