WHAT IS CLAIMED IS:
1. An aqueous dispersion, comprising:
a resin having a polymerizable group;
a gel particle which comprises a polymerizable group, comprises a three-dimensional
cross-linked structure containing at least one kind of bond selected from a urethane bond and a
urea bond, and comprises a photopolymerization initiator in the interior of the gel particle; and
water,
wherein a total amount of a solid content of the gel particle with respect to a total
amount of the resin having a polymerizable group is 0.1% by mass to 100% by mass.
2. The aqueous dispersion according to claim 1,
wherein the photopolymerization initiator comprises at least one of a carbonyl
compound or an acylphosphine oxide compound.
3. The aqueous dispersion according to claim 1 or 2,
wherein the gel particle comprises a hydrophilic group on a surface of the gel particle.
4. The aqueous dispersion according to any one of claims 1 to 3,
wherein the gel particle comprises a polymerizable monomer in the interior of the gel
particle.
5. The aqueous dispersion according to any one of claims 1 to 4,
wherein the gel particle comprises a sensitizer in the interior of the gel particle.
6. The aqueous dispersion according to any one of claims 1 to 5,
wherein the resin having a polymerizable group comprises a polyurethane structure.
7. The aqueous dispersion according to any one of claims 1 to 6,
wherein a total amount of a solid content of the gel particle with respect to a total
amount of the resin having a polymerizable group is 5% by mass to 75% by mass.
8. The aqueous dispersion according to any one of claims 1 to 7, wherein a content of the resin having a polymerizable group with respect to a total
amount of the aqueous dispersion is 2% by mass to 40% by mass.
9. A method for manufacturing the aqueous dispersion according to any one of claims 1 to 8,
the method comprising:
a preparation step of preparing a gel particle dispersion comprising the gel particle
and water; and
a resin mixing step of mixing the gel particle dispersion with the resin having a
polymerizable group to obtain the aqueous dispersion.
10. The method for manufacturing the aqueous dispersion according to claim 9,
wherein the preparation step comprises:
an emulsification step of obtaining an emulsion by mixing and emulsifying any
oil-phase component selected from an oil-phase component comprising a photopolymerization
initiator, an isocyanate compound having three or more functional groups, a polymerizable
monomer, and an organic solvent, an oil-phase component comprising a photopolymerization
initiator, a polymerizable group-containing isocyanate compound having three or more
functional groups, and an organic solvent, and an oil-phase component comprising a
photopolymerization initiator, a polymerizable group-containing isocyanate compound having
three or more functional groups, a polymerizable monomer, and an organic solvent, with a
water-phase component comprising water; and
a gelification step of obtaining the gel particle dispersion by heating the emulsion.
11. The method for manufacturing the aqueous dispersion according to claim 10,
wherein the isocyanate compound having three or more functional groups in the
oil-phase component comprises an isocyanate compound derived from at least one kind of
compound selected from isophorone diisocyanate, hexamethylene diisocyanate,
trimethylhexamethylene diisocyanate, 1,3-bis(isocyanatomethyl)cyclohexane, m-xylylene
diisocyanate, and dicyclohexylmethane 4,4-diisocyanate.
12. An image forming method, comprising:
an application step of applying the aqueous dispersion according to any one of claims
1 to 8 onto a recording medium; and an irradiation step of irradiating the aqueous dispersion applied onto the recording
medium with an active energy ray.