Curable composition, three-dimensional object producing method, three-dimensional object producing apparatus, and artificial tooth object
A curable composition containing a radical-polymerizable monomer and a hard solid component having a volume average particle diameter of 10 nm or greater and 1,000 nm or less is provided. The content of the hard solid component is 3% by volume or greater and 40% by volume or less. The difference (n 1 −n 2 ) between the refractive index (n 1 ) of a cured product of any other component than the hard solid component and the refractive index (n 2 ) of the hard solid component is 0.04 or greater.
1 . A curable composition, comprising:
a radical-polymerizable monomer; and
a hard solid component having a volume average particle diameter of 10 nm or greater and 1,000 nm or less,
wherein a content of the hard solid component is 3% by volume or greater and 40% by volume or less,
an absolute value (|n 1 −n 2 |) of a difference between a refractive index (n 1 ) of a cured product of any other component than the hard solid component and a refractive index (n 2 ) of the hard solid component is 0.04 or greater, and
a viscosity of the curable composition at 25° C. is 1,000 mPa·s or lower.
2 . The curable composition according to claim 1 ,
wherein the difference between the refractive indices is 0.05 or greater.
3 . The curable composition according to claim 2 ,
wherein the difference between the refractive indices is 0.07 or greater.
4 . The curable composition according to claim 1 ,
wherein the hard solid component is silica that is surface-modified with a silane coupling agent.
5 . The curable composition according to claim 4 ,
wherein the silane coupling agent contains an unsaturated double bond.
6 . The curable composition according to claim 1 ,
wherein the content of the hard solid component is 5% by volume or greater and 30% by volume or less relative to a whole amount of the curable composition.
7 . The curable composition according to claim 1 ,
wherein the volume average particle diameter of the hard solid component is 100 nm or greater and 500 nm or less.
8 . The curable composition according to claim 7 ,
wherein the volume average particle diameter of the hard solid component is 180 nm or greater and 500 nm or less.
9 . The curable composition according to claim 1 ,
wherein the radical-polymerizable monomer contains a (meth)acrylic-based monomer.
10 . The curable composition according to claim 1 , further comprising:
a polymerization initiator,
wherein a content of the polymerization initiator is 0.1% by mass or greater and 10.0% by mass or less relative to a whole amount of the curable composition.
11 . The curable composition according to claim 1 , further comprising:
a radical-polymerizable oligomer.
12 . The curable composition according to claim 11 ,
wherein the radical-polymerizable oligomer contains a urethane group.
13 . The curable composition according to claim 11 ,
wherein a content of the radical-polymerizable oligomer is 1.0% by mass or greater and 40.0% by mass or less relative to a whole amount of the curable composition.
14 . A three-dimensional object producing method, comprising:
discharging the curable composition according to claim 1 by an inkjet method; and
curing the curable composition discharged, by irradiation with active energy rays,
wherein the three-dimensional object producing method includes repeating the discharging and the curing in order.
15 . A three-dimensional object producing apparatus, comprising:
a storage container storing the curable composition according to claim 1 ;
a discharging unit configured to discharge the curable composition by an inkjet method; and
a curing unit configured to cure the curable composition discharged, by irradiation with active energy rays.
16 . An artificial tooth object, comprising:
a hard solid component having a volume average particle diameter of 10 nm or greater and 1,000 nm or less,
wherein a content of the hard solid component is 3% by volume or greater and 40% by volume or less,
an absolute value (|n 1 −n 2 |) of a difference between a refractive index (n 1 ) of a cured product of any other component than the hard solid component and a refractive index (n 2 ) of the hard solid component is 0.04 or greater,
the hard solid component is spherical particles, and 50% by number of primary particles of the spherical particles are distributed separately from one another, and
a total light transmittance through the artificial tooth object having an average thickness of 1 mm is 30% or lower, and
said artificial tooth object is obtained by irradiating the curable composition according to claim 1 , with active energy rays or heating.