Curable composition
Provided is a curable composition that can form a lens having excellent visibility, antiglare effects, and contrast-enhancing effects by suppressing thermal degradation of a tetraazaporphyrin compound. The curable composition according to the present disclosure includes silsesquioxane containing a cyclohexene oxide group, and a tetraazaporphyrin compound having an absorption peak in a wavelength region of from 570 to 605 nm, in which a content of the tetraazaporphyrin compound is from 1000 to 10000 ppm by weight of a content of the silsesquioxane.
1 . A hard coating film comprising a cured product of a curable composition, said curable composition comprising: silsesquioxane containing a cyclohexene oxide group; and a tetraazaporphyrin compound having an absorption peak in a wavelength region of 570 to 605 nm,
wherein a content of the tetraazaporphyrin compound is from 1000 to 10000 ppm by weight of a content of the silsesquioxane, and
wherein a luminous transmittance of the hard coating film is 78% or greater.
2 . The hard coating film according to claim 1 , wherein the silsesquioxane contains a structural unit represented by Formula (I) and a structural unit represented by Formula (II) below:
[R a SiO 3/2 ] (I)
where in Formula (I), R a represents a group containing a cyclohexene oxide group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a hydrogen atom; and
[R a SiO 2/2 (OR b )] (II)
where in Formula (II), R a is the same as described above, and R b represents a hydrogen atom or an alkyl group having from 1 to 4 carbons,
wherein a ratio of a content of the structural unit represented by Formula (I) to a content of the structural unit represented by Formula (II) (former/latter; molar ratio) is from 5 to 500; and
wherein 50 to 100 mol % of the total structural units represented by Formula (I) and (II) are structural units in which R a represents a group containing a cyclohexene oxide group.
3 . The hard coating film according to claim 1 , wherein,
in a transmission spectrum, a minimum value of a downward peak is in a wavelength region of from 570 to 605 nm,
a transmittance (t1) of the minimum value of the downward peak is 80% or less,
a ratio (t2/t1) of a transmittance (t2) at a wavelength of 550 nm to the transmittance (t1) is 1.1 or greater, and
a ratio (t3/t1) of a transmittance (t3) at a wavelength of 625 nm to the transmittance (t1) is 1.1 or greater.
4 . A method for producing a hard coated lens, the method comprising applying the curable composition to a lens surface and subjecting to curing to obtain a hard coated lens including the hard coating film according to claim 1 .
5 . A hard coated lens comprising the hard coating film according to claim 1 on a lens surface.
6 . Spectacles comprising the hard coated lens according to claim 5 .
7 . The hard coating film according to claim 2 , wherein,
in a transmission spectrum, a minimum value of a downward peak is in a wavelength region of from 570 to 605 nm,
a transmittance (t1) of the minimum value of the downward peak is 80% or less,
a ratio (t2/t1) of a transmittance (t2) at a wavelength of 550 nm to the transmittance (t1) is 1.1 or greater, and
a ratio (t3/t1) of a transmittance (t3) at a wavelength of 625 nm to the transmittance (t1) is 1.1 or greater.
8 . The hard coating film according to claim 1 , further comprising a solvent,
wherein a content of the solvent is from 0.5 to 3 times the content by weight of the silsesquioxane.
9 . The hard coating film according to claim 2 , further comprising a solvent,
wherein a content of the solvent is from 0.5 to 3 times the content by weight of the silsesquioxane.
10 . The hard coating film according to claim 3 , further comprising a solvent,
wherein a content of the solvent is from 0.5 to 3 times the content by weight of the silsesquioxane.
11 . The hard coating film according to claim 7 , further comprising a solvent,
wherein a content of the solvent is from 0.5 to 3 times the content by weight of the silsesquioxane.