Active energy ray-curable ink-jet printing ink
The object of the present invention is to provide an active energy ray-curable ink-jet printing ink, including: a coloring agent; a compound having an ethylenic double bond; and a photo-polymerization initiator, wherein the photo-polymerization initiator includes a compound represented by general formula (1): (wherein A represents any one of —O—, —CH 2 —, —CH(CH 3 )—, and —C(CH 3 ) 2 —; and each of R 1 and R 2 independently represents a hydrogen atom, a methyl group, or a trimethylsilyl group), and an α-aminoketone-based compound and/or an acyl phosphine oxide-based compound, and 40% by mass or more of the compound represented by general formula (1) is included with respect to the total photo-polymerization initiator.
1. An active energy ray-curable ink-jet printing ink, comprising:
a coloring agent;
a compound having an ethylenic double bond; and
a photo-polymerization initiator,
wherein the photo-polymerization initiator includes a compound represented by general formula (2):
a compound represented by general formula (5) and/or (6):
and
a compound represented by general formula (11) and/or (12):
wherein the photo-polymerization initiator includes 50% to 80% by mass of the compound represented by general formula (2), 10% to 30% by mass of the compound represented by general formula (5) and/or (6), and 10% to 20% by mass of the compound represented by general formula (11) and/or (12) with respect to the total photo-polymerization initiators;
the total amount of all photo-polymerization initiators is 7% by mass to 15% by mass with respect to the mass of all components of the active energy-ray curable ink-jet printing ink;
and solvent for dilution are not substantially included.
2. The active energy ray-curable ink-jet printing ink according to claim 1 , wherein the coloring agent is a white pigment.
3. An active energy ray-curable ink-jet printing ink, comprising:
a coloring agent;
a compound having an ethylenic double bond; and
a photo-polymerization initiator,
wherein the photo-polymerization initiator includes a compound represented by general formula (2):
a compound represented by general formula (5) and/or (6):
and
a compound represented by general formula (13):
40% to 80% by mass of the compound represented by general formula (2) is included with respect to the total photo-polymerization initiators;
the amount of the compound represented by general formula (5) and/or (6) is 10% by mass or more with respect to the total photo-polymerization initiators;
the amount of the compound represented by general formula (13) is 10% by mass or more with respect to the total photo-polymerization initiators;
the total amount of all photo-polymerization initiators is 7% by mass to 15% by mass with respect to the mass of all components of the active energy-ray curable ink-jet printing ink; and
solvent for dilution are not substantially included.
4. The active energy ray-curable ink-jet printing ink according to claim 3 , wherein the coloring agent is a white pigment.
5. The active energy ray-curable ink-jet printing ink according to claim 3 , wherein the photo-polymerization initiator includes 50% to 80% by mass of the compound represented by general formula (2) with respect to the total photo-polymerization initiators.