Photocurable composition for three-dimensional stereolithography and three-dimensional object
View Patent ↗A photocurable composition for three-dimensional stereolithography which has a lower viscosity and from which a cured product having a high refractive index is obtained, and a three-dimensional object formed by using the composition. The composition is a photocurable composition for three-dimensional stereolithography containing a fluorene monomer, a carbazole monomer, a diluent monomer, and a photopolymerization initiator, the carbazole monomer being contained in an amount of less than 30 wt % with respect to the total amount of the fluorene monomer and the carbazole monomer, and the diluent monomer being contained in an amount of at least 20 wt % with respect to total solids.
1. A photocurable composition for three-dimensional stereolithography comprising:
a fluorene monomer;
a carbazole monomer;
a diluent monomer; and
a photopolymerization initiator,
wherein the carbazole monomer is contained in an amount in a range of 5 to 25 wt % with respect to a total amount of the fluorene monomer and the carbazole monomer, and
the diluent monomer is contained in an amount of at least 20 wt % with respect to total solids.
2. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the fluorene monomer and the carbazole monomer are contained in a total amount of 30-80 wt % with respect to total monomers.
3. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the diluent monomer has a refractive index of at least 1.47.
4. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the diluent monomer has a viscosity of up to 500 mPa·s.
5. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the diluent monomer contains:
a compound (1) as a compound represented by formula (D1) provided that no substituent is included, and
a compound (2) as a compound represented by formula (D1) provided that a hydroxy group is included as a substituent,
with formula (D1) being:
W-L-P (D1)
where, in formula (D1), W represents an alicyclic hydrocarbon group or an aromatic hydrocarbon group, provided that fluorenyl group is not included, L represents a single bond or a divalent linking group, P represents a polymerizable group, and W, L, and P may each have a substituent.
6. The photocurable composition for three-dimensional stereolithography according to claim 1 , having a viscosity of up to 900 mPa·s.
7. The photocurable composition for three-dimensional stereolithography according to claim 1 , having, when cured, a transmittance of at least 85%.
8. A three-dimensional object formed by using the photocurable composition for three-dimensional stereolithography according to claim 7 .
9. The three-dimensional object according to claim 8 , being an optical element.
10. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the carbazole monomer is contained in an amount in a range of 10 to 25 wt % with respect to the total amount of the fluorene monomer and the carbazole monomer.
11. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the carbazole monomer is contained in an amount in a range of 15 to 25 wt % with respect to the total amount of the fluorene monomer and the carbazole monomer.
12. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the carbazole monomer is contained in an amount in a range of 5 to 15 wt % with respect to the total amount of the fluorene monomer and the carbazole monomer.
13. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the diluent monomer is contained in an amount in a range of 20 to 90 wt % with respect to total solids.
14. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the diluent monomer is contained in an amount in a range of 20 to 80 wt % with respect to total solids.
15. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the diluent monomer is contained in an amount in a range of 40 to 70 wt % with respect to total solids.
16. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the diluent monomer is contained in an amount in a range of 44 to 60 wt % with respect to total solids.
17. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the carbazole monomer includes at least one polymerizable group.
18. The photocurable composition for three-dimensional stereolithography according to claim 1 , wherein the total solids includes all ingredients excluding solvents other than an alcohol used as an anti-yellowing agent.