Radiation curable ink jet composition
A radiation curable ink jet composition contains: a dispersant; a polymerizable compound; and a hindered amine compound represented by the following general formula (1) or (2), the radiation curable ink jet composition has a viscosity of 50 mPa·s or less at 25° C., and the dispersant has an acid value of 30 mgKOH/g or more, In the formula (1), R 1 represents H—, O═, or R 2 —CO—, and R 2 represents an alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aromatic ring, In the formula (2), R 3 represents —OCO—R 4 —COO—, and R 4 represents an alkyl group having 1 to 12 carbon atoms.
1 . A radiation curable ink jet composition comprising:
a dispersant;
a polymerizable compound; and
a hindered amine compound represented by the following general formula (1),
wherein the radiation curable ink jet composition has a viscosity of 50 mPa·s or less at 25° C., and
the dispersant has an acid value of 30 mgKOH/g or more,
where in the formula (1), R 1 represents H—, O═, or R 2 —COO—, and R 2 represents an alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aromatic ring.
2 . The radiation curable ink jet composition according to claim 1 ,
wherein the hindered amine compound has a molecular weight of 250 or more.
3 . The radiation curable ink jet composition according to claim 1 ,
wherein a content of the hindered amine compound with respect to a total mass of the radiation curable ink jet composition is 0.5 percent by mass or less.
4 . The radiation curable ink jet composition according to claim 1 ,
wherein the polymerizable compound includes a vinyl group-containing (meth)acrylate represented by the following general formula (3),
H 2 C═CR 5 —CO—OR 6 —O—CH═CH—R 7 (3)
where in the formula (3), R 5 represents a hydrogen atom or a methyl group, R 6 represents a divalent organic residue having 2 to 20 carbon atoms, and R 7 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms.