Composition for forming colored layer, optical film, and display device

Abstract

This composition for forming a colored layer comprises a color material (A), a photopolymerizable compound (B), a photopolymerization initiator (C), and an organic solvent (D), wherein the organic solvent (D) exhibits a solubility index [R] of less than 8.3, as expressed in expression (1) below, with respect to the color material (A). Expression (1): R=[4×(δd-17.8)2+(δp-8.4)2+(δh-5.1)2]1 / 2 [In expression (1), δd, δp, and δh, represent the dispersion parameter, the polarity parameter, and the hydrogen bond parameter, respectively, of the Hansen solubility parameters, and the unit for each is (MPa)1 / 2.]

Description

Colored layer-forming composition, optical film, and display device

[0001] The present invention relates to a colored layer-forming composition, an optical film, and a display device. This application claims priority from Japanese Patent Application No. 2024-113413, filed on July 16, 2024, the contents of which are incorporated herein by reference.

[0002] Generally, electrodes and other metal wirings of an organic light emitting display device may reflect external light (external light), resulting in poor black display and contrast. To solve this problem, a polarizer and a phase retarder may be disposed on the organic light emitting device to suppress external light reflection.

[0003] However, in the method using a polarizing plate and a phase retardation plate, a significant portion of the light generated from the organic light emitting layer is lost when it passes through the polarizing plate and the phase retardation plate and is emitted to the outside.

[0004] Patent Document 1 discloses a method for selectively absorbing external light for each wavelength band and adjusting transmittance to suppress reflection of external light, thereby improving visibility and minimizing loss of light emitted from an organic light emitting device to the outside.

[0005] Furthermore, Patent Document 2 discloses a configuration containing color materials having maximum absorption wavelengths in at least the wavelength ranges of 480 to 510 nm and 580 to 610 nm in order to improve RGB color separation as an improvement in color purity.

[0006] Japanese Patent No. 5673713 Japanese Patent Application Laid-Open No. 2019-56865

[0007] Dyes and pigments are used as the coloring materials, but many dyes are poorly soluble, and pigments may lack dispersion stability depending on the solvent. As a result, there are issues such as dye residue due to insufficient solubility in the colored layer-forming composition, precipitation and separation of pigments due to insufficient dispersion stability, and reduced scratch resistance after the colored layer is formed.

[0008] According to the present invention, both the solubility and dispersion stability of the colorant in the color layer-forming composition and the physical properties of the color layer after formation are achieved.

[0009] The present invention has the following aspects: [1] A colored layer-forming composition comprising a colorant (A), a photopolymerizable compound (B), a photopolymerization initiator (C), and an organic solvent (D), wherein the organic solvent (D) has a solubility index [R] for the colorant (A), represented by the following formula (1), of less than 8.3: R=[4×(δd−17.8) ２ +(δp-8.4) ２ +(δh-5.1) ２ ] １／２ ... (1) [In formula (1), δd, δp, and δh represent the dispersion term, polar term, and hydrogen bond term in the Hansen solubility parameter, respectively, and the units are all (MPa) １／２ [2] The coloring material (A) includes at least one of a first coloring material, a second coloring material, and a third coloring material, wherein the first coloring material has an absorption maximum wavelength in the range of 470 to 530 nm and an absorption spectrum half width of 15 to 45 nm, the second coloring material has an absorption maximum wavelength in the range of 560 to 620 nm and an absorption spectrum half width of 15 to 55 nm, and the third coloring material has a wavelength in the range of 380 to 780 nm at which the lowest transmittance is in the range of 650 to 780 nm. [3] The coloring material according to [2], further including a pigment having absorption in the visible light range of 380 to 780 nm. [4] The coloring material according to [1], wherein the boiling point of the organic solvent (D) is lower than 170°C. [5] The colored layer-forming composition according to [1], wherein the organic solvent (D) satisfies at least one of the following formulas (2) and (3): 0<δp<16 (2) δh<14 (3) [6] The colored layer-forming composition according to [1], further comprising at least one additive (E) selected from the group consisting of a radical scavenger, a singlet oxygen quencher, and a peroxide decomposer. [7] The colored layer-forming composition according to [6], wherein the radical scavenger comprises a polymer containing a structural unit represented by the following formula (4): [In the above formula (4), R １２represents a hydrogen atom, a halogen atom, a carboxyl group, a sulfo group, a cyano group, a hydroxy group, an alkyl group having 10 or less carbon atoms, an alkoxycarbonyl group having 10 or less carbon atoms, an alkylsulfonylaminocarbonyl group having 10 or less carbon atoms, an arylsulfonylaminocarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylaminosulfonyl group having 10 or less carbon atoms, an alkoxy group having 10 or less carbon atoms, an alkylthio group having 10 or less carbon atoms, an aryloxy group having 10 or less carbon atoms, a nitro group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an acyloxy group having 10 or less carbon atoms, an acyl group having 10 or less carbon atoms, a carbamoyl group, a sulfamoyl group, an aryl group having 10 or less carbon atoms, a substituted amino group, a substituted ureido group, a substituted phosphono group, or a heterocyclic group; R １３ represents a hydrogen atom or an alkyl group having 30 or less carbon atoms, and X represents a single bond, an ester group, an aliphatic alkyl chain having 30 or less carbon atoms, an aromatic chain, a polyethylene glycol chain, or a linking group formed by combining these, any of which may contain a spirodioxane ring.] [8] The colored layer-forming composition according to [6], wherein the singlet oxygen quencher includes at least one selected from the group consisting of dialkyldithiophosphates, dialkyldithiocarbanates, benzenedithiols, transition metal complexes thereof, and compounds represented by the following formula (5): [In the above formula (5), R １ each independently represents an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, R ９ CO-, R １０ SO ２ - or R １１ represents NHCO—, and R ９ , R １０ and R １１ each independently represents an alkyl group, an alkenyl group, an aryl group, or a heterocyclic group; R ２ and R ３ each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, or an alkenyloxy group; R ４ ~R ８each independently represents a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group.] [9] The colored layer-forming composition according to [2], wherein the colorant (A) contains at least one compound selected from the group consisting of compounds having a porphyrin structure, a merocyanine structure, a phthalocyanine structure, an azo structure, a cyanine structure, a squarylium structure, a coumarin structure, a polyene structure, a quinone structure, a tetraazaporphyrin structure, a pyrromethene structure, and an indigo structure, and metal complexes thereof.

[10] An optical film comprising: a colored layer that is a cured product of the colored layer-forming composition according to [1]; a transparent substrate positioned on one side of the colored layer; and a functional layer positioned on one or the other side of the colored layer, wherein one or both of the transparent substrate and the functional layer have an ultraviolet ray shielding rate of 85% or more as measured in accordance with the method described in JIS L1925.

[11] The optical film according to

[10] , wherein the functional layer includes at least one of an antireflection layer and an antiglare layer.

[12] The functional layer has an oxygen permeability of 10 cm ３ / (m ２

[13] The optical film according to

[10] , wherein the functional layer includes at least one of an antistatic layer and an antifouling layer.

[14] A display device comprising the optical film according to

[10] .

[0010] According to the present invention, it is possible to provide a composition for forming a colored layer that can achieve both solubility and dispersion stability of a colorant and physical properties after the formation of the colored layer. According to the present invention, it is possible to provide an optical film that has a colored layer that functions as a light-absorbing layer and can maintain its function even during long-term use, and a display device using the same.

[0011] FIG. 1 is a cross-sectional view of an optical film according to one embodiment. FIG. 2 is a conceptual diagram showing a coordinate plot of the Hansen solubility parameters of a colorant (A). FIG. 3 is a conceptual diagram showing a coordinate plot of the Hansen solubility parameters of an organic solvent (D). FIG. 4 is a cross-sectional view of an optical film according to another embodiment. FIG. 5 is a cross-sectional view of an optical film according to another embodiment. FIG. 6 is a cross-sectional view of an optical film according to another embodiment. FIG. 7 is a cross-sectional view of an optical film according to another embodiment. FIG. 8 is a conceptual diagram for explaining a method for calculating the reflection characteristics of an optical film. FIG. 9 is a graph showing a spectrum when white is displayed through an organic EL light source and a color filter in an example. FIG. 10 is a graph showing spectra when red, green, and blue are displayed through an organic EL light source and a color filter in an example.

[0012] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In all drawings, even if the embodiments are different, the same or corresponding components are designated by the same reference numerals, and common descriptions will be omitted.

[0013] [Optical Film] An optical film according to one embodiment of the present invention will be described in detail with reference to FIG.

[0014] 1 , the optical film 60 has a colored layer 61, a transparent substrate 62, and a functional layer 63. That is, the optical film 60 has the transparent substrate 62 located on one side of the colored layer 61, and is a laminate in which the colored layer 61, the transparent substrate 62, and the functional layer 63 are laminated in this order.

[0015] In the optical film 60, at least one of the transparent substrate 62 and the functional layer 63 preferably has an ultraviolet ray shielding rate of 85% or more. The ultraviolet ray shielding rate is more preferably 90% or more, even more preferably 95% or more, and may be 100%. When the ultraviolet ray shielding rate is equal to or greater than the above lower limit, the light resistance and heat resistance are more excellent. The ultraviolet ray shielding rate can be measured in accordance with the method described in JIS L 1925. More specifically, the transparent substrate 62 or the functional layer 63 is formed on a glass substrate, and the substrate is peeled off using cellophane tape conforming to the JIS-K5600 adhesion test. The transmittance is measured using an automatic spectrophotometer (e.g., U-4100 manufactured by Hitachi, Ltd.) with the adhesive tape (i.e., cellophane tape) as a reference. Using this transmittance, the arithmetic mean value of the transmittance for each 1 nm in the ultraviolet range (290 nm to 400 nm) is taken as the average transmittance [%], and the ultraviolet shielding rate [%] is calculated by subtracting the average transmittance [%] in the ultraviolet range (290 nm to 400 nm) from 100%. The ultraviolet shielding rate of the transparent substrate is measured using an automatic spectrophotometer with the value when nothing is installed as a reference, and calculated in the same manner as above. The ultraviolet shielding rate can be adjusted by imparting ultraviolet absorption ability to at least one of the transparent substrate 62 and the functional layer 63.

[0016] The thickness of the optical film 60 is, for example, preferably 10 to 140 μm, more preferably 15 to 120 μm, and even more preferably 20 to 100 μm. When the thickness of the optical film 60 is equal to or greater than the above lower limit, the strength of the optical film 60 can be further increased. When the thickness of the optical film 60 is equal to or less than the above upper limit, not only can the optical film 60 be made lighter, but it is also advantageous for reducing the thickness of the display device.

[0017] Each layer constituting the optical film 60 will now be described.

[0018] <<Colored Layer>> The colored layer 61 is a cured product of a colored layer-forming composition. The colored layer-forming composition contains a colorant (A), an active energy ray-curable compound (B), a photopolymerization initiator (C), and an organic solvent (D).

[0019] The thickness of the colored layer 61 is preferably, for example, 0.5 to 10 μm. When the thickness of the colored layer 61 is equal to or greater than the above-mentioned lower limit, the colorant can be contained without causing abnormalities in the appearance of the colored layer 61, and the light absorption properties of the colorant can improve the reflectivity and color reproducibility. When the thickness of the colored layer 61 is equal to or less than the above-mentioned upper limit, this is advantageous for making the display device thinner. The thickness of the colored layer 61 can be determined by observing a cross section of the optical film 60 in the thickness direction (a cross section viewed from a direction intersecting the thickness direction) with a microscope or the like.

[0020] <Colorant (A)> The colorant (A) preferably contains a first colorant, a second colorant, and a third colorant. The first colorant has an absorption maximum wavelength in the range of 470 to 530 nm and a half-width of the absorption spectrum of 15 to 45 nm. If the absorption maximum wavelength is equal to or greater than the lower limit, the luminance efficiency of blue light emission is less likely to decrease, and if it is equal to or less than the upper limit, the luminance efficiency of green light emission is less likely to decrease. If the half-width of the absorption spectrum is equal to or greater than the lower limit, the effect of suppressing the reflection characteristics with respect to external light is excellent, and if it is equal to or less than the upper limit, the luminance efficiency is less likely to decrease.

[0021] The second colorant has a maximum absorption wavelength in the range of 560 to 620 nm and a half-width of the absorption spectrum of 15 to 55 nm. If the maximum absorption wavelength is equal to or greater than the lower limit, the luminance efficiency of green light emission is less likely to decrease, and if it is equal to or less than the upper limit, the luminance efficiency of red light emission is less likely to decrease. If the half-width of the absorption spectrum is equal to or greater than the lower limit, the effect of suppressing the reflectivity of external light is excellent, and if it is equal to or less than the upper limit, the luminance efficiency is less likely to decrease.

[0022] The third coloring material has a wavelength in the range of 380 to 780 nm at which the transmittance is lowest in the range of 650 to 780 nm. If the wavelength in the range of 650 to 780 nm at which the transmittance is lowest is equal to or higher than the lower limit, the luminance efficiency of red light emission is less likely to decrease, and if it is equal to or lower than the upper limit, the effect of suppressing the reflectivity of external light is excellent.

[0023] The coloring material (A) is preferably one that is easily soluble or dispersible in the organic solvent (A). The coloring material (A) is preferably one that has a solubility index [R ＡＤ ] is preferably less than 8.3. ＡＤ= [4 × (δd Ａ -17.8) ２ +(δp Ａ -8.4) ２ + (δh Ａ -5.1) ２ ] １／２ ...(6) [In formula (6), δd Ａ , δp Ａ and δh Ａ represents the Hansen solubility parameter for the colorant, which indicates the dispersion term, polar term, and hydrogen bond term, respectively, and all are expressed in units of (MPa) １／２ It is.]

[0024] Equation (6) is an equation based on the coordinates (17.8, 8.4, 5.1) of the Hansen solubility parameters relative to cyclohexanone.

[0025] Solubility index [R ＡＤ When the value of [N / (N)] is less than 8.3, a solvent having high solubility and dispersion stability of the coloring material can be selected.

[0026] The coloring material (A) is a colorant having a solubility index [R Ａ ] is more preferably 8.2 or less. Ａ = [4 × (δd Ａ -17.67) ２ +(δp Ａ -8.41) ２ + (δh Ａ -5.44) ２ ] １／２ ...(7) [In formula (7), δd Ａ , δp Ａ and δh Ａ represents the Hansen solubility parameter for the colorant, which indicates the dispersion term, polar term, and hydrogen bond term, respectively, and all are expressed in units of (MPa) １／２ It is.]

[0027] Equation (7) is an equation based on the coordinates of the center of the smallest solubility sphere including the solubility parameter coordinates of Dye-1 to Dye-4 and Pigment-1, which will be described later.

[0028] Solubility index [R Ａ When the value of ] is 8.2 or less, a solvent having high solubility and dispersion stability of the coloring material can be selected.

[0029] R ＡＤ -R Ａ The difference in solubility index represented by R is preferably −0.42 to 0.42, and more preferably −0.35 to 0.35. ＡＤ -R Ａ When the difference in the solubility index expressed by is within the above range, a solvent having high solubility and dispersion stability of the colorant can be selected more accurately.

[0030] In order for the colorant (A) used to satisfy the above formulas (6) and (7), it is preferable that the polarity of the colorant (A) be within a certain range. In the present invention, the following method is used to select a colorant (A) that meets the above conditions as a colorant (A) having a polarity within a certain range based on the Hansen solubility parameters. As shown in Figure 2, the Hansen solubility parameter is a solubility parameter introduced by Hildebrand, divided into three components: a dispersion term δd, a polar term δp, and a hydrogen bonding term δh, and expressed in three-dimensional space. The dispersion term δd indicates the effect of dispersion forces, the polar term δp indicates the effect of dipole-dipole forces, and the hydrogen bonding term δh indicates the effect of hydrogen bonding forces. The definition and calculation of the Hansen solubility parameter are based on Charles M. The Hansen solubility parameters are described in Hansen, Hansen Solubility Parameters: A Users Handbook (CRC Press, 2007). Furthermore, the Hansen solubility parameters can be easily estimated using computer software Hansen Solubility Parameters in Practice (HSPiP). In the present invention, it is preferable to select a colorant (A) to be used by using the value registered in the database of HSPiP version 4.0.03 for the colorant (A) and by using an estimated value for the colorant (A) not in the database. Generally, the Hansen solubility parameter of a specific colorant (A) can be determined by conducting a test in which a sample of the colorant (A) is dissolved in a number of different solvents for which the Hansen solubility parameters have been established and the solubility is measured. Specifically, a sphere (solubility sphere) is found in which all three-dimensional points of the solvents used in the solubility test that dissolved the colorant (A) are included inside the sphere, and points of the solvents that did not dissolve the colorant (A) are outside the sphere, and the coordinates of the center of the sphere are taken as the Hansen solubility parameter of the colorant (A).Here, for example, if the point indicated by the coordinates of the Hansen solubility parameter of colorant (A) is contained within the solubility sphere of the colorant (A), then the organic solvent (D) contained within the sphere of the organic solvent (D) described below, which is at a certain distance from the coordinates (17.8, 8.4, 5.1) based on cyclohexanone, can be used as a preferred solvent. １ , A ２ , ..., A ｎ When the colorant (A) is contained, the Hansen solubility parameter of the colorant (A) is expressed by the following formula (8): １ , A ２ , ..., A ｎ ) and its volume fraction.

[0031]

[0032] [In formula (8), δd Ａ , δp Ａ and δh Ａ represents the Hansen solubility parameter for the colorant (A), which indicates the dispersion term, polar term, and hydrogen bond term, respectively, and all are expressed in units of (MPa). １／２ δd ｉ , δp ｉ , δh ｉ is the colorant (A) contained in the colorant (A) １ , A ２ , ..., A ｎ ) represents the solubility parameter of ｉ represents its volume. Ａ is V ｉ The total volume of the colorant (A) is expressed as the sum of the above.

[0033] The colorant (A) preferably contains one or more compounds selected from the group consisting of compounds having a porphyrin structure, a merocyanine structure, a phthalocyanine structure, an azo structure, a cyanine structure, a squarylium structure, a coumarin structure, a polyene structure, a quinone structure, a tetraazaporphyrin structure, a pyrromethene structure, and an indigo structure, and metal complexes thereof. In particular, metal complexes having a porphyrin structure, a pyrromethene structure, and a phthalocyanine structure, or compounds having a squarylium structure, are more preferred due to their excellent reliability. The colorant (A) may contain one or more of these compounds or metal complexes thereof. These compounds or metal complexes may be contained in the first colorant, the second colorant, the third colorant, or two or more of these colorants. Examples of metals that form complexes include manganese, vanadium, molybdenum, chromium, sodium, aluminum, cobalt, potassium, gallium, iron, magnesium, calcium, thallium, nickel, copper, zinc, cadmium, palladium, gold, mercury, and platinum, with cobalt and copper being preferred. Specifically, the colorant (A) is preferably a dye containing a cobalt or copper complex having a pyrromethene structure, a tetraazaporphyrin structure, or a phthalocyanine structure, or a pigment containing a zinc complex having a phthalocyanine structure. The colorant (A) may be used alone or in combination of two or more types.

[0034] The content of the colorant (A) is preferably 0.05 to 5 mass %, more preferably 0.05 to 2.5 mass %, relative to the total mass of the colored layer-forming composition. When the content of the colorant (A) is equal to or greater than the lower limit, the anti-reflection effect is more excellent. When the content of the colorant (A) is equal to or less than the upper limit, it is easier to prevent the colorant (A) from remaining undissolved or its dispersibility from decreasing.

[0035] <Active Energy Ray-Curable Compound (B)> The active energy ray-curable compound (B) is a compound that polymerizes and cures when irradiated with active energy rays such as ultraviolet rays or electron beams. For example, a monofunctional, difunctional, trifunctional or higher functional (meth)acrylate monomer, urethane (meth)acrylate, etc. can be used. Here, "(meth)acrylate" means both or either one of "acrylate" and "methacrylate."

[0036] Examples of the monofunctional (meth)acrylate compound that can be contained in the active energy ray-curable compound (B) include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate, glycidyl (meth)acrylate, acryloylmorpholine, N-vinylpyrrolidone, tetrahydrofurfuryl acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and 2-ethylhexyl (meth)acrylate. Xyl (meth)acrylate, isobornyl (meth)acrylate, isodecyl (meth)acrylate, lauryl (meth)acrylate, tridecyl (meth)acrylate, cetyl (meth)acrylate, stearyl (meth)acrylate, benzyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate, 3-methoxybutyl (meth)acrylate, ethyl carbitol (meth)acrylate, phosphate (meth)acrylate, ethylene oxide-modified phosphate (meth)acrylate, phenoxy (meth)acrylate, ethylene oxide Oxide-modified phenoxy (meth)acrylate, propylene oxide-modified phenoxy (meth)acrylate, nonylphenol (meth)acrylate, ethylene oxide-modified nonylphenol (meth)acrylate, propylene oxide-modified nonylphenol (meth)acrylate, methoxydiethylene glycol (meth)acrylate, methoxypolyethylene glycol (meth)acrylate, methoxypropylene glycol (meth)acrylate, 2-(meth)acryloyloxyethyl-2-hydroxypropyl phthalate, 2-hydroxypropyl acrylate hydroxy-3-phenoxypropyl (meth)acrylate, 2-(meth)acryloyloxyethyl hydrogen phthalate, 2-(meth)acryloyloxypropyl hydrogen phthalate, 2-(meth)acryloyloxypropyl hexahydrohydrogen phthalate, 2-(meth)acryloyloxypropyl tetrahydrohydrogen phthalate, dimethylaminoethyl (meth)acrylate, trifluoroethyl (meth)acrylate, tetrafluoropropyl (meth)acrylate, hexafluoropropyl (meth)acrylate,Examples of such acrylates include octafluoropropyl (meth)acrylate and adamantane derivative mono(meth)acrylate (e.g., adamantyl acrylate having a monovalent mono(meth)acrylate derived from 2-adamantane or adamantanediol). Here, "(meth)acryloyl" refers to both or either "acryloyl" or "methacryloyl".

[0037] Examples of bifunctional (meth)acrylate compounds that can be contained in the active energy ray-curable compound (B) include ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, butanediol di(meth)acrylate, hexanediol di(meth)acrylate, nonanediol di(meth)acrylate, ethoxylated hexanediol di(meth)acrylate, propoxylated hexanediol di(meth)acrylate, diethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, Examples of di(meth)acrylates include ethylene glycol di(meth)acrylate, polypropylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, ethoxylated neopentyl glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, hydroxypivalic acid neopentyl glycol di(meth)acrylate, tricyclodecane dimethanol di(meth)acrylate, ethylene oxide (EO)-modified bisphenol A di(meth)acrylate, and triethylene glycol di(meth)acrylate.

[0038] Examples of the trifunctional or higher (meth)acrylate compound that can be contained in the active energy ray-curable compound (B) include tri(meth)acrylates such as trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, tris-2-hydroxyethyl isocyanurate tri(meth)acrylate, and glycerin tri(meth)acrylate; trifunctional compounds such as pentaerythritol tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, and ditrimethylolpropane tri(meth)acrylate; functional (meth)acrylate compounds such as tri- or higher functional polyfunctional (meth)acrylate compounds such as pentaerythritol tetra(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, ditrimethylolpropane penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and ditrimethylolpropane hexa(meth)acrylate; and polyfunctional (meth)acrylate compounds in which a portion of these (meth)acrylates is substituted with an alkyl group or ε-caprolactone.

[0039] Examples of urethane (meth)acrylates that can be contained in the active energy ray-curable resin (B) include those obtained by reacting a polyester polyol with an isocyanate monomer or a prepolymer, and then reacting the resulting product with a (meth)acrylate monomer having a hydroxyl group.

[0040] More specific examples of urethane (meth)acrylates include pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer, dipentaerythritol pentaacrylate hexamethylene diisocyanate urethane prepolymer, pentaerythritol triacrylate toluene diisocyanate urethane prepolymer, dipentaerythritol pentaacrylate toluene diisocyanate urethane prepolymer, pentaerythritol triacrylate isophorone diisocyanate urethane prepolymer, and dipentaerythritol pentaacrylate isophorone diisocyanate urethane prepolymer.

[0041] The monofunctional, difunctional, trifunctional or higher functional (meth)acrylate monomer, urethane (meth)acrylate, etc. that can be contained in the active energy ray-curable compound (B) may be used alone or in combination of two or more thereof. In addition, they may be partially polymerized oligomers.

[0042] The active energy ray curable compound (B) preferably contains a compound having only two (meth)acryloyl groups, because it has better light resistance. Examples of compounds having only two (meth)acryloyl groups include the above-mentioned bifunctional (meth)acrylate compounds, hexadiol di(meth)acrylate, tricyclodecane dimethanol di(meth)acrylate, etc. Among the above, compounds having an alicyclic skeleton are preferred, because they have better light resistance and heat resistance. Examples of compounds having only two (meth)acryloyl groups and an alicyclic skeleton include tricyclodecane dimethanol di(meth)acrylate and tricyclodecane diethanol di(meth)acrylate.

[0043] The compound having only two (meth)acryloyl groups may be used in combination with other active energy ray-curable compounds. The active energy ray-curable compounds (B) may be used alone or in combination of two or more.

[0044] The content of the active energy ray-curable compound (B) is preferably 20 to 80 mass %, more preferably 30 to 70 mass %, relative to the total mass of the color layer-forming composition. When the content of the active energy ray-curable compound (B) is equal to or greater than the above-mentioned lower limit, the effect of inhibiting fading can be further enhanced. When the content of the active energy ray-curable compound (B) is equal to or less than the above-mentioned upper limit, the handleability of the color layer-forming composition can be further improved.

[0045] When the active energy ray-curable compound (B) contains a compound having only two (meth)acryloyl groups, the content of the compound having only two (meth)acryloyl groups is preferably 20 mass% or more, more preferably 40 mass% or more, or even 100 mass% relative to the total mass of the active energy ray-curable compound (B) from the viewpoint of more excellent light resistance and adhesion to the substrate. The content of the compound having only two (meth)acryloyl groups is preferably 80 mass% or less, more preferably 60 mass% or less from the viewpoint of more excellent chemical resistance.

[0046] <Photopolymerization Initiator (C)> Examples of the photopolymerization initiator (C) include those which generate radicals when irradiated with active energy rays. Examples of the photopolymerization initiator (C) include benzoins (benzoin alkyl ethers such as benzoin, benzoin methyl ether, benzoin ethyl ether, and benzoin isopropyl ether), phenyl ketones [for example, alkyl phenyl ketones such as acetophenones (for example, acetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, and 1,1-dichloroacetophenone) and 2-hydroxy-2-methylpropiophenone; cycloalkyl phenyl ketones such as 1-hydroxycyclohexyl phenyl ketone], aminoacetophenones {2-methyl-1-[4-(methylthio)phenyl] [4-morpholinophenyl]-2-morpholinoaminopropanone-1, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1, etc.}, anthraquinones (anthraquinone, 2-methylanthraquinone, 2-ethylanthraquinone, 2-t-butylanthraquinone, 1-chloroanthraquinone, etc.), thioxanthones (2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2-chlorothioxanthone, 2,4-diisopropylthioxanthone, etc.), ketals (acetophenone dimethyl ketal, benzyl dimethyl ketal, etc.), benzophenones (benzophenone, etc.), xanthones, phosphine oxides (for example, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, etc.), etc. These photopolymerization initiators may be used alone or in combination of two or more.

[0047] The content of the photopolymerization initiator (C) is preferably 0.01 to 20% by mass, and more preferably 0.01 to 5% by mass, relative to the total mass of the solid content of the color layer-forming composition. When the content of the photopolymerization initiator (C) is equal to or greater than the above-mentioned lower limit, the curability is better. When the content of the photopolymerization initiator (C) is equal to or less than the above-mentioned upper limit, unreacted photopolymerization initiator (C) is less likely to remain, and reliability such as heat resistance is better.

[0048] <Organic Solvent (D)> One embodiment of the colored layer-forming composition contains an organic solvent (D) having a solubility index [R] for the colorant (A), represented by the following formula (1), of less than 8.3: R=[4×(δd−17.8) ２ +(δp-8.4) ２ +(δh-5.1) ２ ] １／２ ... (1) [In formula (1), δd, δp, and δh represent the dispersion term, polar term, and hydrogen bond term in the Hansen solubility parameter, respectively, and the units are all (MPa) １／２ It is.]

[0049] In order for the organic solvent used to satisfy the above formula (1), it is preferable that the polarity of the organic solvent be within a certain range. In the present invention, the following method was used to select a solvent that meets the above conditions as a solvent having a polarity within a certain range based on the Hansen solubility parameters. As shown in Figure 3, the Hansen solubility parameter is a solubility parameter introduced by Hildebrand, which is divided into three components: a dispersion term δd, a polar term δp, and a hydrogen bonding term δh, and expressed in three-dimensional space. The dispersion term δd indicates the effect of dispersion forces, the polar term δp indicates the effect of dipole-dipole forces, and the hydrogen bonding term δh indicates the effect of hydrogen bonding forces. The definition and calculation of the Hansen solubility parameter are based on Charles M. The Hansen Solubility Parameters are described in Hansen, Hansen Solubility Parameters: A Users Handbook (CRC Press, 2007). Furthermore, the Hansen Solubility Parameters can be easily estimated using computer software Hansen Solubility Parameters in Practice (HSPiP). In the present invention, it is preferable to select a solvent to be used by using the value registered in the database of HSPiP version 4.0.03 for solvents, and by using an estimated value for solvents not in the database. Generally, the Hansen Solubility Parameters of a specific colorant (A) can be determined by conducting a test in which a sample of the colorant (A) is dissolved in a number of different solvents for which the Hansen Solubility Parameters have been established, and the solubility is measured. Specifically, a sphere (solubility sphere) is found in which all three-dimensional points of the solvents used in the solubility test that dissolved the colorant (A) are contained within the sphere, and points of the solvents that did not dissolve the colorant (A) are located outside the sphere, and the coordinates of the center of the sphere are taken as the Hansen solubility parameter of the colorant (A). Here, for example, if the Hansen solubility parameters of another solvent that was not used in measuring the Hansen solubility parameter of colorant (A) are (δd, δp, δh), then if the point indicated by those coordinates is contained within the solubility sphere of the colorant (A), then the solvent is considered to dissolve the colorant (A).On the other hand, if the coordinate point is outside the solubility sphere of the colorant (A), it is considered that the solvent cannot dissolve the colorant (A). In the present invention, using this Hansen solubility parameter, it is determined that a group of solvents that are a certain distance from the coordinates (17.8, 8.4, 5.1), which are the Hansen solubility parameters of cyclohexanone, which is a solvent that can dissolve the colorant (A) contained in the colored layer-forming composition and is the optimal solvent for dissolving the colorant (A) at room temperature, can be used as a reference and can be used as a reference. When the organic solvent (D) is a plurality of solvents (D. １ , D ２ , ..., D ｎ In the case of a mixed solvent consisting of the organic solvent (D), the Hansen solubility parameter of the organic solvent (D) is expressed by the following formula (9): １ , D ２ , ..., D ｎ ) and its volume fraction.

[0050]

[0051] In formula (9), δd, δp, and δh represent the Hansen solubility parameters for the organic solvent (D), which represent the dispersion term, polar term, and hydrogen bond term, respectively, and are all expressed in units of (MPa). １／２ δd ｉ , δp ｉ , δh ｉ represents a plurality of solvents (D) contained in the organic solvent (D) １ , D ２ , ..., D ｎ ) represents the solubility parameter of ｉ represents its volume. Ｄ is V ｉ The total volume of the organic solvent (D) is expressed as follows:

[0052] It is preferable that the organic solvent (D) satisfies at least one of the following formulas (2) and (3): 0<δp<16 (2) δh<14 (3) When the organic solvent (D) satisfies the following formula (2), the polar term of the organic solvent (D) takes a value closer to the center of the Hansen solubility sphere, making it easier to suppress the insoluble residue of the colorant (A) and the decrease in dispersibility. When the organic solvent (D) satisfies the following formula (3), the hydrogen bonding term of the organic solvent (D) takes a value closer to the center of the Hansen solubility sphere, making it easier to suppress the insoluble residue of the colorant (A) and the decrease in dispersibility.

[0053] The boiling point of the organic solvent (D) is preferably 45 to 170°C, more preferably 50 to 160°C, and even more preferably 55 to 150°C. When the boiling point of the organic solvent (D) is within the above range, it is easy to suppress film surface abnormalities during film formation and the amount of organic solvent remaining in the coating film. When the organic solvent (D) is a mixed solvent containing two or more organic solvents, the boiling point of the mixed solvent is the same as the boiling point of the organic solvent with the highest boiling point.

[0054] The Hildebrand solubility parameter (δ) of the organic solvent (D) is preferably 7 to 13, more preferably 8 to 12, and even more preferably 9 to 11. When the solubility parameter (δ) of the organic solvent (D) is within the above range, it is likely to be in a range that satisfies the above formula (1), and the colorant (A) can be easily dissolved or dispersed.

[0055] The organic solvent (D) satisfying the above formula (1) preferably contains an aprotic polar solvent, and the content of the aprotic polar solvent is preferably 40 mass% or more, more preferably 40 to 100 mass%, based on the total mass of the organic solvent (D).

[0056] Examples of the organic solvent (D) include ethers, ketones, esters, alcohols, amides, aromatic hydrocarbons, and cellosolves. Examples of ethers include dibutyl ether, dimethoxymethane, dimethoxyethane, diethoxyethane, propylene oxide, 1,4-dioxane, 1,3-dioxolane, 1,3,5-trioxane, tetrahydrofuran, anisole, phenetole, propylene glycol monomethyl ether, and propylene glycol monomethyl ether acetate. Examples of ketones include acetone, methyl ethyl ketone, diethyl ketone, dipropyl ketone, diisobutyl ketone, methyl isobutyl ketone, cyclopentanone, cyclohexanone, methylcyclohexanone, ethylcyclohexanone, and diacetone alcohol. Examples of esters include ethyl formate, propyl formate, n-pentyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate, n-pentyl acetate, γ-butyrolactone, propylene glycol monomethyl ether acetate, and propylene carbonate. Examples of alcohols include propylene glycol monomethyl ether and diacetone alcohol. Examples of amides include N,N-dimethylformamide. Examples of aromatic hydrocarbons include toluene. Examples of cellosolves include methyl cellosolve, cellosolve (ethyl cellosolve), butyl cellosolve, and cellosolve acetate. Among these, the organic solvent (D) is preferably an ether, a ketone, an ester, an alcohol, an amide, an aromatic hydrocarbon, or a combination of two or more solvents selected from these, and more preferably tetrahydrofuran, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, acetone, methyl ethyl ketone, cyclohexanone, diacetone alcohol, methyl acetate, ethyl acetate, N,N-dimethylformamide, toluene, 1,3-dioxolane, or a combination of two or more solvents selected from these. One type of organic solvent (D) may be used alone, or two or more types may be used in combination.

[0057] The content of the solvent is preferably 20 to 80% by mass, more preferably 30 to 70% by mass, based on the total mass of the colored layer-forming composition. When the content of the solvent is equal to or greater than the lower limit, the handleability of the colored layer-forming composition can be further improved. When the content of the solvent is equal to or less than the upper limit, the time required to form the colored layer can be shortened.

[0058] <Additives> The color layer-forming composition may contain additives other than those described above. The color layer-forming composition may contain, as additives, a radical scavenger, an antioxidant, a peroxide decomposer, a leveling agent, an antifoaming agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a photosensitizer, a conductive material, etc.

[0059] (Radical Scavenger) The radical scavenger has the function of capturing radicals when the colorant (A) undergoes oxidative degradation, suppressing autoxidation and suppressing dye degradation (also called fading). Any radical scavenger may be used as long as it has the ability to capture radicals (also called radical scavenging ability), and examples thereof include resins having an amine structure. Here, the "amine structure" refers to a structure in which the hydrogen atom of ammonia is substituted with a hydrocarbon group or an aromatic atomic group. Examples of the amine structure include primary amines, secondary amines, and tertiary amines, and may also be quaternary ammonium cations.

[0060] Examples of resins having an amine structure that can be used as radical scavengers include resins having a hindered amine structure with a molecular weight of 2000 or more. When the molecular weight of a resin having a hindered amine structure is 2000 or more, a high anti-fading effect can be obtained. This is thought to be because many molecules remain within the colored layer 61, resulting in a sufficient anti-fading effect. The molecular weight of a resin having a hindered amine structure is, for example, about 200,000, but the upper limit is not particularly limited. In this specification, "molecular weight" refers to the "mass average molecular weight" measured by gel permeation chromatography (GPC) using polystyrene as a standard substance.

[0061] In a preferred embodiment, the radical scavenger is a polymer containing a structural unit represented by the following formula (4):

[0062]

[0063] In the above formula (4), R １２ represents a hydrogen atom, a halogen atom, a carboxyl group, a sulfo group, a cyano group, a hydroxy group, an alkyl group having 10 or less carbon atoms, an alkoxycarbonyl group having 10 or less carbon atoms, an alkylsulfonylaminocarbonyl group having 10 or less carbon atoms, an arylsulfonylaminocarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylaminosulfonyl group having 10 or less carbon atoms, an alkoxy group having 10 or less carbon atoms, an alkylthio group having 10 or less carbon atoms, an aryloxy group having 10 or less carbon atoms, a nitro group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an acyloxy group having 10 or less carbon atoms, an acyl group having 10 or less carbon atoms, a carbamoyl group, a sulfamoyl group, an aryl group having 10 or less carbon atoms, a substituted amino group, a substituted ureido group, a substituted phosphono group or a heterocyclic group; R １３ represents a hydrogen atom or an alkyl group having 30 or less carbon atoms, and X represents a single bond, an ester group, an aliphatic alkyl chain having 30 or less carbon atoms, an aromatic chain, a polyethylene glycol chain, or a linking group formed by combining these. １２ , R １３ and X may both contain a spirodioxane ring.

[0064] R １２ R is preferably a hydrogen atom, a hydroxy group, or an alkyl group having 10 or less carbon atoms. The number of carbon atoms in the alkyl group is preferably 1 to 6, and more preferably 1 to 3. １３ is preferably a hydrogen atom or an alkyl group having 10 or less carbon atoms. The number of carbon atoms in the alkyl group is preferably 1 to 6, and more preferably 1 to 3. X is preferably a single bond or an aliphatic alkyl chain having 30 or less carbon atoms. The number of carbon atoms in the aliphatic alkyl chain is preferably 10 or less, preferably 1 to 6, and more preferably 2 to 4.

[0065] In this embodiment, the radical scavenger may contain, as its main component (the component with the largest mass %), a copolymer of the structural unit represented by formula (4) above and a copolymerization component having any of the repeating units described below. By using the copolymer, it is possible to control the compatibility with other components.

[0066] Examples of the repeating unit include (meth)acrylate repeating units, olefin repeating units, halogen atom-containing repeating units, styrene repeating units, vinyl acetate repeating units, and vinyl alcohol repeating units.

[0067] Examples of the (meth)acrylate repeating unit include a repeating unit derived from a (meth)acrylate monomer having a linear or branched alkyl group on the side chain, and a repeating unit derived from a (meth)acrylate monomer having a hydroxyl group on the side chain.

[0068] Examples of the repeating unit derived from a (meth)acrylate monomer having the linear or branched alkyl group on the side chain include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate, butyl (meth)acrylate, isobutyl (meth)acrylate, s-butyl (meth)acrylate, t-butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, octyl (meth)acrylate, and isopropyl (meth)acrylate. Examples of monomer-derived components include octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, nonyl (meth)acrylate, isononyl (meth)acrylate, decyl (meth)acrylate, isodecyl (meth)acrylate, undecyl (meth)acrylate, dodecyl (meth)acrylate, tridecyl (meth)acrylate, tetradecyl (meth)acrylate, myristyl (meth)acrylate, pentadecyl (meth)acrylate, hexadecyl (meth)acrylate, heptadecyl (meth)acrylate, and octadecyl (meth)acrylate. These may be used alone or in combination of two or more. Among the above, (meth)acrylate-based repeating units having a linear or branched alkyl group having from 1 to 4 carbon atoms in the side chain are preferred.

[0069] Examples of the repeating units derived from (meth)acrylic monomers having a hydroxyl group in the side chain include components derived from monomers such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate, hydroxyphenyl (meth)acrylate, etc. These may be used alone or in combination of two or more.

[0070] Examples of the olefin repeating unit include components derived from olefin monomers such as ethylene, propylene, isoprene, butadiene, etc. These may be used alone or in combination of two or more.

[0071] Examples of the halogen atom-containing repeating unit include components derived from monomers such as vinyl chloride, vinylidene chloride, etc. These may be used alone or in combination of two or more.

[0072] Examples of styrene-based repeating units include components derived from styrene-based monomers such as styrene, α-methylstyrene, and vinyltoluene. These may be used alone or in combination of two or more. Examples of vinyl acetate-based repeating units include esters of saturated carboxylic acids and vinyl alcohol, such as vinyl acetate and vinyl propionate. These may be used alone or in combination of two or more. Examples of vinyl alcohol-based repeating units include vinyl alcohol, which may have a 1,2-glycol bond in the side chain.

[0073] The copolymer may have any of the structures of a random copolymer, an alternating copolymer, a block copolymer, and a graft copolymer. If the copolymer has a random structure, the manufacturing process and preparation with other components are easy. Therefore, a random copolymer is preferable to other copolymers.

[0074] Radical polymerization can be used as a polymerization method for obtaining the copolymer. Radical polymerization is preferred because it is easy to produce industrially. Radical polymerization may be a solution polymerization method, an emulsion polymerization method, a bulk polymerization method, or a suspension polymerization method. For radical polymerization, it is preferable to use a solution polymerization method. By using a solution polymerization method, it is easy to control the molecular weight of the copolymer.

[0075] In radical polymerization, the above-mentioned monomer may be diluted with a polymerization solvent, and then a polymerization initiator may be added to polymerize the monomer. The polymerization solvent may be, for example, an ester-based solvent, an alcohol ether-based solvent, a ketone-based solvent, an aromatic solvent, an amide-based solvent, or an alcohol-based solvent. The ester-based solvent may be, for example, methyl acetate, ethyl acetate, n-butyl acetate, isobutyl acetate, t-butyl acetate, methyl lactate, or ethyl lactate. The alcohol ether-based solvent may be, for example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether, 3-methoxy-1-butanol, or 3-methoxy-3-methyl-1-butanol. The ketone-based solvent may be, for example, acetone, methyl ethyl ketone, methyl isobutyl ketone, or cyclohexanone. The aromatic solvent may be, for example, benzene, toluene, or xylene. The amide solvent may be, for example, formamide or dimethylformamide. The alcohol solvent may be, for example, methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, s-butanol, t-butanol, diacetone alcohol, or 2-methyl-2-butanol. The above-mentioned polymerization solvents may be used alone or in combination of two or more.

[0076] The radical polymerization initiator may be, for example, a peroxide or an azo compound. Examples of the peroxide include benzoyl peroxide, t-butyl peroxyacetate, t-butyl peroxybenzoate, and di-t-butyl peroxide. Examples of the azo compound include azobisisobutyronitrile, azobisamidinopropane salt, azobiscyanovaleric acid (salt), and 2,2'-azobis[2-methyl-N-(2-hydroxyethyl)propionamide]. One type of radical polymerization initiator may be used alone, or two or more types may be used in combination.

[0077] The amount of radical polymerization initiator used is preferably 0.0001 parts by mass or more and 20 parts by mass or less, more preferably 0.001 parts by mass or more and 15 parts by mass or less, and even more preferably 0.005 parts by mass or more and 10 parts by mass or less, when the total amount of monomers is set to 100 parts by mass. The radical polymerization initiator may be added to the monomers and polymerization solvent before the start of polymerization, or may be added dropwise to the polymerization reaction system. Adding the radical polymerization initiator dropwise to the monomers and polymerization solvent in the polymerization reaction system is preferred because it can suppress heat generation due to polymerization.

[0078] The reaction temperature of the radical polymerization is appropriately selected depending on the types of radical polymerization initiator and polymerization solvent. From the viewpoints of ease of production and reaction controllability, the reaction temperature is preferably 60° C. or higher and 110° C. or lower. One type of radical scavenger may be used alone, or two or more types may be used in combination.

[0079] When the radical scavenger is a polymer containing a structural unit represented by formula (4), the content of the structural unit represented by formula (4) is preferably 1 to 95 mol %, more preferably 10 to 90 mol %, based on the total molar amount of the monomers constituting the radical scavenger. When the content of the structural unit represented by formula (4) is within the above numerical range, the light fastness and heat resistance of the colorant (A) are improved, and fading is easily suppressed.

[0080] (Antioxidant) The color layer-forming composition preferably contains, as an antioxidant that is a singlet oxygen quencher, one or more compounds selected from the group consisting of sulfur-based antioxidants and compounds represented by the following formula (5) (hereinafter referred to as "compound A"). By containing one or more compounds selected from the group consisting of sulfur-based antioxidants and compound A, the light resistance and heat resistance of the color material (A) are improved.

[0081]

[0082] In formula (5), R 1 are each independently an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, or R ９ CO － , R １０ SO ２ － or R １１ NHCO － R represents a group represented by ９ , R １０ and R １１ each independently represents an alkyl group, an alkenyl group, an aryl group, or a heterocyclic group; R ２ and R ３ each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, or an alkenyloxy group; R ４ , R ５ , R ６ , R ７ and R ８ each independently represents a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group.

[0083] Examples of sulfur-based antioxidants include dialkyldithiophosphates, dialkyldithiocarbamate, benzenedithiol, and transition metal complexes thereof. These compounds may be used alone or in combination of two or more.

[0084] The total content of the sulfur-based antioxidant and compound A is preferably 0.1 to 15% by mass, more preferably 0.1 to 10% by mass, based on the total mass of the solids in the color layer-forming composition. When the content is equal to or greater than the lower limit, the color material (A) is more likely to exhibit fading-suppressing effects in terms of light resistance and heat resistance. When the content is equal to or less than the upper limit, the color layer-forming composition has better curability.

[0085] (Peroxide decomposer) The peroxide decomposer has the function of decomposing peroxides generated when the coloring material (A) is oxidized and deteriorated, stopping the auto-oxidation cycle and suppressing the deterioration of the pigment. As the peroxide decomposer, a phosphorus-based antioxidant or a sulfur-based antioxidant can be used.

[0086] Examples of phosphorus-based antioxidants include 2,2'-methylenebis(4,6-di-t-butyl-1-phenyloxy)(2-ethylhexyloxy)phosphorus, 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, and 6-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-t-butyldibenz[d,f][1,3,2]dioxaphosphepine.

[0087] Examples of sulfur-based antioxidants include 2,2-bis({[3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl-bis[3-(dodecylthio)propionate], 2-mercaptobenzimidazole, dilauryl-3,3′-thiodipropionate, dimyristyl-3,3′-thiodipropionate, distearyl-3,3′-thiodipropionate, pentaerythrityl-tetrakis(3-laurylthiopropionate), and 2-mercaptobenzothiazole.

[0088] <Transparent Substrate> The transparent substrate 62 is a sheet-like member located on one side of the colored layer 61 and forming the optical film 60. Examples of materials for forming the transparent substrate 62 include transparent resins and inorganic glass. Examples of transparent resins include polyolefins, polyesters, polyacrylates, polyamides, polyimides, polyarylates, polycarbonates, triacetyl cellulose, polyvinyl alcohol, polyvinyl chloride, cycloolefin copolymers, norbornene-containing resins, polyether sulfones, and polysulfones. Examples of polyolefins include polyethylene and polypropylene. Examples of polyesters include polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate. Examples of polyacrylates include polymethyl methacrylate. Examples of polyamides include nylon 6 and nylon 66. Among these, films made of polyethylene terephthalate (PET), films made of triacetyl cellulose (TAC), films made of polymethyl methacrylate (PMMA), and films made of polyesters other than PET are preferred. The thickness of the transparent substrate 62 is not particularly limited, but is preferably 10 to 100 μm, for example. The total light transmittance of the transparent substrate 62 is preferably 90% or more, for example.

[0089] The transparent substrate 62 may be provided with ultraviolet absorbing ability. By adding an ultraviolet absorbing agent to the resin that is the raw material of the transparent substrate 62, the transparent substrate 62 can be provided with ultraviolet absorbing ability.

[0090] Examples of the ultraviolet absorber include salicylic acid ester-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, benzotriazine-based ultraviolet absorbers, cyanoacrylate-based ultraviolet absorbers, etc. These ultraviolet absorbers may be used alone or in combination of two or more.

[0091] When the transparent substrate 62 is provided with ultraviolet absorbing ability, the ultraviolet shielding rate of the transparent substrate 62 is preferably 85% or more. When the ultraviolet shielding rate is 85% or more, the effect of suppressing fading of the colorant (A) due to its optical properties is more excellent. Here, the ultraviolet shielding rate is a value measured in accordance with JIS L1925, and is calculated by the following formula: ultraviolet shielding rate (%) = 100 - average transmittance (%) of ultraviolet light with a wavelength of 290 to 400 nm.

[0092] <<Functional Layer>> The functional layer 63 is located on one or the other surface of the colored layer 61. The optical film 60 can exhibit various functions by having the functional layer 63. Examples of the functions of the functional layer 63 include an anti-reflection function, an anti-glare function, an anti-static function, an anti-fouling function, a reinforcement function, and an ultraviolet absorbing function (ultraviolet absorbing ability). The functional layer 63 may be a single layer or multiple layers. The functional layer 63 may have one type of function or two or more types of functions.

[0093] When the optical film 60 has an anti-reflection function, the functional layer 63 functions as an anti-reflection layer. An example of the anti-reflection layer is a low refractive index layer that exhibits a lower refractive index than the transparent substrate 62, the hard coat layer, or the anti-glare layer described below. The low refractive index layer can be formed by using a material for the functional layer that has a lower refractive index than the materials of the transparent substrate 62, the hard coat layer, or the anti-glare layer. In order to adjust the refractive index of the low refractive index layer, lithium fluoride (LiF), magnesium fluoride (MgF ２ ), sodium hexafluoroaluminum (cryolite, cryolite, 3NaF·AlF ３ , Na ３ AlF ６ ), aluminum fluoride (AlF ３), silica fine particles, etc. may be blended. As the silica fine particles, the use of porous silica fine particles or hollow silica fine particles having voids inside the particles is effective in lowering the refractive index of the low refractive index layer. Furthermore, the composition for forming the low refractive index layer (composition for forming the low refractive index layer) may be appropriately blended with the photopolymerization initiator (C), solvent, and additives described in the colored layer. The refractive index of the low refractive index layer is preferably 1.20 to 1.55. The thickness of the low refractive index layer is not particularly limited, but is preferably 40 nm to 1 μm, for example.

[0094] When the optical film 60 has an anti-glare function, the functional layer 63 functions as an anti-glare layer. The anti-glare layer has fine irregularities on its surface, which scatter external light and reduce glare, improving display quality. When combined with a low refractive index layer, the low refractive index layer and the anti-glare layer form an anti-reflection layer. The anti-glare layer optionally contains one or more organic or inorganic fine particles. The organic fine particles are a material that forms fine irregularities on the surface and provides the function of scattering external light. Examples of organic fine particles include resin particles made of translucent resin materials such as acrylic resin, polystyrene resin, styrene-(meth)acrylic acid ester copolymer, polyethylene resin, epoxy resin, silicone resin, polyvinylidene fluoride, and polyethylene fluoride resin. Two or more types of resin particles with different refractive indices may be mixed to adjust the refractive index and dispersibility of the resin particles. The inorganic fine particles are a material that adjusts the sedimentation and aggregation of the organic fine particles. Examples of inorganic fine particles include silica fine particles, metal oxide fine particles, and various mineral fine particles. Examples of silica fine particles include colloidal silica and silica fine particles surface-modified with reactive functional groups such as (meth)acryloyl groups. Examples of metal oxide fine particles include alumina (aluminum oxide), zinc oxide, tin oxide, antimony oxide, indium oxide, titania (titanium dioxide), and zirconia (zirconium dioxide). Examples of mineral fine particles include mica, synthetic mica, vermiculite, montmorillonite, iron-montmorillonite, bentonite, beidellite, saponite, hectorite, stevensite, nontronite, magadiite, ilealite, kanemite, layered titanic acid, smectite, and synthetic smectite. Mineral fine particles may be either natural or synthetic (including substituted or derivative) materials, or a mixture of both may be used. Among mineral fine particles, layered organic clays are more preferred. Layered organic clay refers to a swelling clay in which organic onium ions are introduced between the layers. The organic onium ions are not limited as long as they can be organized by utilizing the cation exchange property of the swelling clay. When using a layered organic clay mineral as the mineral fine particles, the above-mentioned synthetic smectite can be preferably used.Synthetic smectite has the function of increasing the viscosity of the coating liquid for forming the antiglare layer, suppressing the settling of resin particles and inorganic fine particles, and adjusting the uneven shape of the surface of the antiglare layer (functional layer 63).

[0095] When the optical film 60 has an antistatic function, the functional layer 63 functions as an antistatic layer. Examples of the antistatic layer include a layer containing metal oxide fine particles such as antimony-doped tin oxide (ATO) and tin-doped indium oxide (ITO), a polymeric conductive composition, and an antistatic agent such as a quaternary ammonium salt. When the functional layer 63 has multiple layers, the antistatic layer may be provided on the outermost surface of the functional layer 63, or may be provided between another functional layer and the transparent substrate 62. The antistatic layer may be formed by blending an antistatic agent into any of the layers constituting the functional layer 63. When an antistatic layer is provided, the surface resistance of the optical film 60 is 1.0×10 ６ ~1.0 x 10 １２ (Ω / cm).

[0096] When the optical film 60 has an antifouling function, the functional layer 63 functions as an antifouling layer. The antifouling layer enhances the antifouling properties by imparting water repellency and / or oil repellency. Examples of the antifouling layer include a layer containing an antifouling agent such as silicon oxide, a fluorine-containing silane compound, a fluoroalkylsilazane, a fluoroalkylsilane, a fluorine-containing silicon compound, or a perfluoropolyether group-containing silane coupling agent. When the functional layer 63 has multiple layers, the antifouling layer may be provided on the outermost surface of the functional layer 63, or the antifouling layer may be formed by incorporating an antifouling agent into the outermost layer of the functional layer 63.

[0097] When the optical film 60 has a reinforcing function, the functional layer 63 functions as a reinforcing layer. The reinforcing layer is a layer that increases the strength of the optical film. Examples of the reinforcing layer include a hard coat layer. Examples of the hard coat layer include a layer formed of a hard coat agent containing an active energy ray-curable compound such as a monofunctional, difunctional, or trifunctional or higher functional (meth)acrylate or urethane (meth)acrylate, and a photopolymerization initiator. The hard coat agent may contain additives or solvents as necessary.

[0098] When the optical film 60 has ultraviolet absorption ability, the functional layer 63 functions as an ultraviolet absorption layer. Examples of the ultraviolet absorption layer include a layer containing a triazine-based ultraviolet absorber such as 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexyloxyphenol, or a benzotriazole-based ultraviolet absorber such as 2-(2H-benzotriazol-2-yl)-4-methylphenol. The content of the ultraviolet absorber is preferably 0.1 to 5 mass% relative to the total mass of the materials forming the ultraviolet absorption layer. When the content of the ultraviolet absorber is equal to or greater than the above-mentioned lower limit, sufficient ultraviolet absorption ability can be imparted to the functional layer 63. When the content of the ultraviolet absorber is equal to or less than the above-mentioned upper limit, insufficient hardness due to a decrease in the curing component can be avoided.

[0099] From the viewpoint of suppressing a decrease in visibility due to reflection of external light, the functional layer 63 preferably has at least one of an anti-reflection function and an anti-glare function. From the viewpoint of preventing the generation of static electricity, anti-fingerprint properties, and water and oil repellency, the functional layer 63 preferably has at least one of an anti-static function and an anti-fouling function. The functional layer 63 may have at least one of an anti-static function and an anti-fouling function in combination with at least one of an anti-reflection function and an anti-glare function. It may also have other functions, such as a strengthening function.

[0100] The thickness of the functional layer 63 is, for example, preferably 0.04 to 25 μm, more preferably 0.1 to 20 μm, and even more preferably 0.2 to 15 μm. When the thickness of the functional layer 63 is equal to or greater than the above lower limit, various functions can be easily imparted to the optical film 60. When the thickness of the functional layer 63 is equal to or less than the above upper limit, it is advantageous for reducing the thickness of the display device.

[0101] [Method for Manufacturing Optical Film] The optical film 60 of this embodiment can be manufactured by a conventionally known method. For example, a colored layer-forming composition is applied to one surface of a transparent substrate 62, and the colored layer-forming composition is cured by irradiating it with active energy rays, thereby obtaining the colored layer 61. The colored layer-forming composition can be prepared by mixing the components that make up the colored layer-forming composition. There are no particular limitations on the method for applying the colored layer-forming composition, and any known application method can be used. Any light source that generates active energy rays can be used as the light source for irradiating the colored layer-forming composition with active energy rays to cure it and form the colored layer 61. Examples of active energy rays that can be used include light energy rays such as radiation (gamma rays, X-rays, etc.), ultraviolet rays, visible light, and electron beams (EB). Ultraviolet rays and electron beams are typically used. For example, lamps that emit ultraviolet rays include low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, carbon arc lamps, metal halide lamps, xenon lamps, and electrodeless discharge tubes. The irradiation condition is that the ultraviolet irradiation dose is usually 100 to 1000 mJ / cm ２ is.

[0102] Next, a functional layer 63 is formed on the other surface of the transparent substrate 62, thereby obtaining an optical film 60 in which the functional layer 63 is located on the other surface of the transparent substrate 62. The method for forming the functional layer 63 is not limited, and known methods can be used. For example, a method for forming a hard coat layer can be exemplified by applying a hard coat agent to the other surface of the transparent substrate 62 (or on another functional layer) and curing it by irradiating it with active energy rays. Examples of a method for forming a low refractive index layer can be exemplified by applying a composition for forming a low refractive index layer to the other surface of the transparent substrate 62 (or on another functional layer) and curing it by irradiating it with active energy rays, vacuum deposition, sputtering, ion plating, ion beam deposition, plasma vapor deposition, etc.

[0103] [Other Embodiments] As shown in FIG. 4 , the optical film may be an optical film 60A having a colored layer 61 and a transparent substrate 62 located on one side of the colored layer 61, with the colored layer 61, transparent substrate 62, hard coat layer 63b, and low refractive index layer 63a laminated in this order. In the optical film 60A, the hard coat layer 63b and low refractive index layer 63a constitute the functional layer 63. The optical film 60A of this embodiment has excellent film-forming properties for the low refractive index layer due to the hard coat layer 63b. The optical film 60A of this embodiment has excellent anti-reflection properties due to the low refractive index layer 63a. In the optical film 60A, it is preferable to impart an ultraviolet absorbing function to either the transparent substrate 62 or the layer constituting the functional layer 63.

[0104] 5, the optical film may be an optical film 60B having a colored layer 61 and a transparent substrate 62 located on one side of the colored layer 61, and in which the colored layer 61, the transparent substrate 62, and a hard coat layer 63b are laminated in this order. In the optical film 60B, the hard coat layer 63b constitutes the functional layer 63. In the optical film 60B, it is preferable that the transparent substrate 62 and the hard coat layer 63b are provided with an ultraviolet absorbing function.

[0105] As shown in FIG. 6 , the optical film may be an optical film 60C having a colored layer 61 and a transparent substrate 62 located on one side of the colored layer 61, with the transparent substrate 62, colored layer 61, hard coat layer 63b, and low refractive index layer 63a laminated in this order. In the optical film 60C, the hard coat layer 63b and low refractive index layer 63a constitute the functional layer 63. The optical film 60C of this embodiment has excellent film-forming properties for the low refractive index layer due to the inclusion of the hard coat layer 63b. The optical film 60C of this embodiment has excellent anti-reflection properties due to the inclusion of the low refractive index layer 63a. In the optical film 60C, it is preferable to impart an ultraviolet absorbing function to one of the layers constituting the functional layer 63.

[0106] As shown in FIG. 7 , the optical film may be an optical film 60D having a colored layer 61 and a transparent substrate 62 located on one side of the colored layer 61, and the colored layer 61, transparent substrate 62, oxygen barrier layer 63c, hard coat layer 63b, and low refractive index layer 63a laminated in this order. In the optical film 60D, the oxygen barrier layer 63c, hard coat layer 63b, and low refractive index layer 63a constitute the functional layer 63. The optical film 60D of this embodiment has excellent light resistance due to the inclusion of the oxygen barrier layer 63c. The optical film 60D of this embodiment has excellent film-forming properties for the low refractive index layer due to the inclusion of the hard coat layer 63b. The optical film 60D of this embodiment has excellent anti-reflection properties due to the inclusion of the low refractive index layer 63a. In the optical film 60D, it is preferable to impart UV absorption functionality to either the transparent substrate 62 or the layers constituting the functional layer 63.

[0107] The optical film according to each of the above-described embodiments has excellent light resistance and can achieve both reflection suppression and luminance efficiency. Therefore, by applying the optical film of the present embodiment to a display device, the display quality of the display device can be improved and the life of the light-emitting element can be extended.

[0108] Although each embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and configuration changes, combinations, etc. are also included within the scope that does not deviate from the gist of the present invention.

[0109] For example, although each of the optical films described above has one colored layer, the number of colored layers may be two or more. In the optical film according to each embodiment, the ultraviolet absorbing ability may be imparted to the transparent substrate 62 or to the functional layer 63 such as the hard coat layer 63b. What is important is that when the optical film is attached to a display device, the ultraviolet absorbing ability is imparted to a layer that is closer to the screen viewed by the user than the colored layer 61.

[0110] [Display Device] The display device of the present invention includes the optical film of the present invention. Specific examples of the display device include televisions, monitors, mobile phones, portable game devices, personal digital assistants, personal computers, electronic books, video cameras, digital still cameras, head-mounted displays, navigation systems, audio playback devices (car audio, digital audio players, etc.), copiers, facsimiles, printers, multi-function printers, vending machines, automated teller machines (ATMs), personal authentication devices, optical communication devices, and IC cards. Among these, display devices including self-luminous elements such as LEDs, organic electroluminescent devices (OLEDs), inorganic phosphors, and quantum dots (QDs) are preferred because they are susceptible to the influence of external light reflection due to metal electrodes and wiring, and the application of the present invention is highly useful.

[0111] Another aspect of the present invention includes the following embodiment: [2-1] A composition comprising a colorant (A), a photopolymerizable compound (B), a photopolymerization initiator (C), and an organic solvent (D), wherein the organic solvent (D) has a solubility index [R] of the colorant (A) represented by the following formula (1) of less than 8.3, and the colorant (A) has a solubility index [R] of the colorant (A) represented by the following formula (6): ＡＤ A colored layer-forming composition in which R=[4×(δd−17.8)] is less than 8.3. ２ +(δp-8.4) ２ +(δh-5.1) ２ ] １／２ ... (1) [In formula (1), δd, δp, and δh represent the dispersion term, polar term, and hydrogen bond term, respectively, in the Hansen solubility parameters for the organic solvent, and the units are all (MPa) １／２ ] R ＡＤ = [4 × (δd Ａ -17.8) ２ +(δp Ａ -8.4) ２ + (δh Ａ -5.1) ２ ] １／２ ...(6) [In formula (6), δd Ａ , δp Ａ and δh Ａindicates the dispersion term, polar term, and hydrogen bond term in the Hansen solubility parameter for the colorant, all of which are expressed in units of (MPa) １／２ [2-2] The colored layer-forming composition according to [2-1], wherein the colorant (A) includes at least one of a first colorant, a second colorant, and a third colorant, wherein the first colorant has an absorption maximum wavelength in the range of 470 to 530 nm and an absorption spectrum half width of 15 to 45 nm, the second colorant has an absorption maximum wavelength in the range of 560 to 620 nm and an absorption spectrum half width of 15 to 55 nm, and the third colorant has a wavelength at which the transmittance is lowest in the range of 650 to 780 nm within a wavelength range of 380 to 780 nm. [2-3] The colored layer-forming composition according to [2-1] or [2-2], wherein the colorant (A) contains at least one compound selected from the group consisting of compounds having a porphyrin structure, a merocyanine structure, a phthalocyanine structure, an azo structure, a cyanine structure, a squarylium structure, a coumarin structure, a polyene structure, a quinone structure, a tetraazaporphyrin structure, a pyrromethene structure, and an indigo structure, and metal complexes thereof. [2-4] The colored layer-forming composition according to any one of [2-1] to [2-3], further containing a pigment having absorption in the visible light region of 380 to 780 nm. [2-5] The colored layer-forming composition according to [1], wherein the organic solvent (D) has a boiling point of less than 170°C. [2-6] The colored layer-forming composition according to any one of [2-1] to [2-4], wherein the organic solvent (D) satisfies at least one of the following formulas (2) and (3): 0<δp<16...(2) δh<14...(3)

[0112] The present invention will be described in more detail below using examples, but the technical scope of the present invention is not limited solely by the specific content of these examples.

[0113] <<Preparation of Optical Films>> In the following examples and comparative examples, optical films A to P were prepared with the layer configurations shown in Tables 1 to 3. In the tables, "-" indicates that the corresponding layer was not present. In addition, in the tables, the "addition amount" indicates the mass % relative to the total mass of the colored layer-forming composition. The method of forming each layer is explained below. Optical films A to G and I of Examples 1 to 7-1 and 7-3 correspond to Structural Example 1, optical films H and J of Examples 7-2 and 7-4 correspond to Structural Example 2, optical film K of Example 7-5 corresponds to Structural Example 3, and optical film L of Example 7-6 corresponds to Structural Example 4. Optical films M to O of Comparative Examples 1 to 3 correspond to Structural Example 1, and optical film P of Comparative Example 4 corresponds to Structural Example 5. The optical films of Structural Examples 1 to 4 correspond to optical films 60A to 60D shown in Figures 4 to 7, respectively. Note that Structural Example 5 is a comparative example that does not have a colored layer.

[0114] Configuration example 1: The hard coat layer may have antistatic, antifouling, and antiglare properties. Configuration example 2: A configuration in which the low refractive index layer is removed from Configuration example 1. Configuration example 3: A configuration in which a colored layer is laminated on a transparent substrate. Configuration example 4: A configuration in which an oxygen barrier layer is introduced into Configuration example 1. Configuration example 5: A configuration in which the colored layer is removed from Configuration example 1.

[0115]

[0116]

[0117]

[0118] For the compositions of Examples 1 to 7-6 and Comparative Examples 1 to 4, coating solutions were prepared according to the formulations shown in Tables 4 to 6, and optical films having the configurations shown in Tables 1 to 3 were evaluated.

[0119] <Transparent Substrate> The following transparent substrates were used: TAC: triacetyl cellulose film (manufactured by Fujifilm Corporation, TG60UL, substrate thickness 60 μm, UV shielding rate 92.9%) PMMA: polymethyl methacrylate film (manufactured by Sumitomo Chemical Co., Ltd., W002N80, substrate thickness 80 μm, UV shielding rate 13.9%)

[0120]

[0121]

[0122]

[0123] The hard coat layer was prepared according to the formulation shown in Table 7.

[0124]

[0125] <<Preparation of Optical Film>> <Hard Coat Layer> [Materials Used in Hard Coat Layer-Forming Composition] The following materials were used for forming the hard coat layer. Active energy ray-curable resin UA-306H: pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer (manufactured by Kyoeisha Chemical Co., Ltd., UA-306H). DPHA: dipentaerythritol hexaacrylate. PETA: pentaerythritol triacrylate. Active energy ray-curable resin Resin 1: a compound represented by the formula (1) R １ is CH ３ , R ２ is CH ３ A resin having an amine structure, in which X is a single bond (molecular weight 120,000). UA-306H: Pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer (manufactured by Kyoeisha Chemical Co., Ltd., UA-306H). DPHA: Dipentaerythritol hexaacrylate. PETA: Pentaerythritol triacrylate. (Production Example of Resin 1) 2.4 g of 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate (FA-711MM, manufactured by Showa Denko Materials Co., Ltd.), 5.6 g of methyl methacrylate (Kanto Chemical Co., Ltd.), 31 g of cyclohexanone (Kanto Chemical Co., Ltd.), and 0.11 g of 2,2'-azobis(isobutyronitrile) (Fujifilm Wako Pure Chemical Industries, Ltd.) were placed in a reaction vessel and heated and stirred at 70°C for 8 hours under a nitrogen gas atmosphere. The mixture was then heated and stirred at 100°C for 1 hour to obtain a polymer solution. This polymer solution was poured into 400 mL of methanol (Kanto Chemical Co., Ltd.), and the resulting precipitate was filtered and dried to obtain Resin 1, which was copolymerized with 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate and methyl methacrylate at a ratio of 15:85 [mol %].

[0126] Photopolymerization initiator Omnirad 819: acylphosphine oxide-based photopolymerization initiator (manufactured by IGM Resins B.V.). Ultraviolet (UV) absorbers Tinuvin 477: hydroxyphenyltriazine-based ultraviolet absorber, Tinuvin (registered trademark) 477 (manufactured by BASF Japan Ltd.). Tinuvin 479: hydroxyphenyltriazine-based ultraviolet absorber, Tinuvin (registered trademark) 479 (manufactured by BASF Japan Ltd.). Tinuvin 970: hydroxyphenyltriazine-based ultraviolet absorber, Tinuvin (registered trademark) 970 (manufactured by BASF Japan Ltd.). Additives (Anti-fouling agent) OPTOOL (registered trademark) AR-110 (manufactured by Daikin Industries, Ltd., solid content 15%, solvent: methyl isobutyl ketone) Anti-glare imparting particles (resin particles) Styrene-methyl methacrylate copolymer particles (refractive index 1.515, average particle size 2.0 μm) (Inorganic fine particles) Inorganic particles 1: synthetic sucmetite Inorganic particles 2: alumina nanoparticles (average particle size 40 nm) Solvents MEK: methyl ethyl ketone Methyl acetate: methyl acetate Toluene: toluene IPA: isopropyl alcohol

[0127] [Formation of Hard Coat Layer] A composition for forming a hard coat layer shown in Table 7 was applied onto the transparent substrate or the oxygen barrier layer and the first functional layer, and dried in an oven at 80°C for 60 seconds. Thereafter, an ultraviolet irradiation device was used to apply an irradiation dose of 150 mJ / cm. ２ The coating film was cured by irradiating it with ultraviolet light using a light source H bulb (manufactured by Fusion UV Systems Japan Co., Ltd.), forming a hard coat layer with a film thickness of 5.0 μm after curing. The amounts added are expressed as mass ratios (% by mass). In the table, "-" indicates that the component is not contained.

[0128] <Low Refractive Index Layer> [Composition for Forming a Low Refractive Index Layer] The following was used as a composition for forming a low refractive index layer to be used in forming the low refractive index layer. Refractive index adjuster: 8.5 parts by mass of a dispersion of porous silica fine particles (average particle size 75 nm, solid content 20%) in methyl isobutyl ketone. Antifouling agent: 5.6 parts by mass of OPTOOL (registered trademark) AR-110 (manufactured by Daikin Industries, Ltd., solid content 15%, solvent: methyl isobutyl ketone). Active energy ray curable resin: 0.4 parts by mass of pentaerythritol triacrylate (PETA). Photopolymerization initiator: 0.07 parts by mass of Omnirad TPO (manufactured by IGM Resins B.V.). Leveling agent: 1.7 parts by mass of RS-77 (manufactured by DIC Corporation). Solvent: 83.73 parts by mass of methyl isobutyl ketone. [Formation of Low Refractive Index Layer] The composition for forming a low refractive index layer was applied onto the hard coat layer and dried in an oven at 80° C. for 60 seconds. Thereafter, an ultraviolet irradiation device was used to irradiate the layer with an irradiation dose of 200 mJ / cm. ２ The coating was cured by irradiating it with ultraviolet light (H bulb light source, manufactured by Fusion UV Systems Japan Co., Ltd.) to form a low refractive index layer having a thickness of 100 nm after curing.

[0129] <Anti-Glare Layer> [Composition for Forming Anti-Glare Layer] The following composition for forming an anti-glare layer was used to form a hard coat layer as an anti-glare layer. - Active energy ray curable resin: Pentaerythritol triacrylate, Light Acrylate PE-3A (manufactured by Kyoeisha Chemical Co., Ltd., refractive index 1.52) 43.7 parts by mass. - Photopolymerization initiator: Omnirad TPO (manufactured by IGM Resins B.V.) 4.55 parts by mass. - Resin particles: Styrene-methyl methacrylate copolymer particles (refractive index 1.515, average particle size 2.0 μm) 0.5 parts by mass. - Inorganic fine particles: Synthetic sucmetite 0.25 parts by mass. Alumina nanoparticles (average particle size 40 nm) 1.0 part by mass. - Solvent: Toluene 15 parts by mass. Isopropyl alcohol 35 parts by mass. [Formation of Antiglare Layer] The above composition for forming an antiglare layer was applied to a transparent substrate shown in Table 2 and dried in an oven at 80°C for 60 seconds. Thereafter, an ultraviolet irradiation device was used to apply an irradiation dose of 150 mJ / cm. ２The coating was cured by irradiating it with ultraviolet light using a light source H bulb (manufactured by Fusion UV Systems Japan Co., Ltd.), to form an antiglare layer having a thickness of 5.0 μm after curing.

[0130] <Anti-Stain Layer> [Anti-Stain Layer-Forming Composition] The following anti-stain layer-forming composition was used to form a hard coat layer as an antistatic and anti-stain layer. Anti-staining agent: Optool (registered trademark) AR-110 (manufactured by Daikin Industries, Ltd., solid content 15%, solvent: methyl isobutyl ketone) 5.6 parts by mass. Active energy ray-curable resin: pentaerythritol triacrylate (PETA) 0.4 parts by mass. Photopolymerization initiator: Omnirad TPO (manufactured by IGM Resins B.V.) 0.07 parts by mass. Leveling agent: RS-77 (manufactured by DIC Corporation) 1.7 parts by mass. Solvent: methyl isobutyl ketone 91.6 parts by mass. [Formation of Anti-Stain Layer] The anti-stain layer-forming composition described above was applied to a transparent substrate shown in Table 2, and then dried in an oven at 80°C for 60 seconds. Then, an ultraviolet irradiation device was used to irradiate the sample with an irradiation dose of 200 mJ / cm ２ The coating was cured by irradiating it with ultraviolet light (H bulb light source, manufactured by Fusion UV Systems Japan Co., Ltd.) to form a low refractive index layer having a thickness of 100 nm after curing.

[0131] <Oxygen Barrier Layer> [Oxygen Barrier Layer-Forming Composition] Polyvinyl alcohol (PVA) resin for binder, Kuraray Poval (registered trademark) PVA-117 (manufactured by Kuraray Co., Ltd.), 80% by mass aqueous solution. [Formation of Oxygen Barrier Layer] The oxygen barrier layer-forming composition was applied to the transparent substrate, dried, and then dried to form an oxygen barrier layer having an oxygen permeability of 1 cm. ３ / (m ２ An oxygen barrier layer having a specific oxygen content (.times.day.atm) was formed.

[0132] <Colored Layer> [Materials used in the composition for forming a colored layer] The following materials were used in the composition for forming a colored layer used to form the colored layer. The absorption maximum wavelength, half width, and minimum transmittance wavelength in the specified wavelength range of the colorant are characteristic values ​​of the cured coating film. Colorant (First Colorant) Dye-1: Pyrromethene cobalt complex dye (absorption maximum wavelength 496 nm, half width 23 nm) <Production Example of Dye-1> Ethyl 4-butyl-2-ethyl-5-formyl-1H-pyrrole-3-carboxylate (2.5 g) was placed in a reaction vessel and dissolved in methanol (50 mL), and then 47% hydrobromic acid (45 g) was added and refluxed for 1 hour. The precipitated solid was filtered off to obtain 3,3'-di-butyl-5,5'-di-ethyl-4,4'-die-ethoxycarbonyl-2,2'-dipyrromethene hydrobromide (2.6 g). 3,3',5,5'-tetramethyl-4,4'-die-ethoxycarbonyl-2,2'-dipyrromethene hydrobromide (0.6 g) was sealed in a reaction vessel, and methanol (5 mL), triethylamine (0.17 g), and cobalt acetate tetrahydrate (0.18 g) were added, followed by refluxing for 2 hours. The precipitated solid was filtered off to obtain Dye-1 (0.42 g). (Second coloring material) Dye-2: tetraazaporphyrin copper complex dye (manufactured by Yamamoto Chemical Industry Co., Ltd., PD-311S, absorption maximum wavelength 586 nm, half width 22 nm). Dye-3: Tetraazaporphyrin copper complex dye (manufactured by Yamada Chemical Co., Ltd., FDG-007, maximum absorption wavelength 595 nm, half width 22 nm). (Third coloring material) Dye-4: Phthalocyanine copper complex dye (manufactured by Yamada Chemical Co., Ltd., FDN-002, minimum transmittance wavelength 780 nm in the 400 to 780 nm range). Pigment-1: Phthalocyanine zinc complex pigment (manufactured by Toyo Visual Solutions Co., Ltd., CFPM-P41-5160C Green).

[0133] Active energy ray curable resin Resin 1: R of formula (1) １ is CH ３ , R ２ is CH ３A resin having an amine structure, in which X is a single bond (molecular weight 120,000). UA-306H: Pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer (manufactured by Kyoeisha Chemical Co., Ltd., UA-306H). DPHA: Dipentaerythritol hexaacrylate. PETA: Pentaerythritol triacrylate. (Production Example of Resin 1) 2.4 g of 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate (FA-711MM, manufactured by Showa Denko Materials Co., Ltd.), 5.6 g of methyl methacrylate (Kanto Chemical Co., Ltd.), 31 g of cyclohexanone (Kanto Chemical Co., Ltd.), and 0.11 g of 2,2'-azobis(isobutyronitrile) (Fujifilm Wako Pure Chemical Industries, Ltd.) were placed in a reaction vessel and heated and stirred at 70°C for 8 hours under a nitrogen gas atmosphere. The mixture was then heated and stirred at 100°C for 1 hour to obtain a polymer solution. This polymer solution was poured into 400 mL of methanol (Kanto Chemical Co., Ltd.), and the resulting precipitate was filtered and dried to obtain Resin 1, which was copolymerized with 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate and methyl methacrylate at a ratio of 15:85 [mol %].

[0134] Photopolymerization initiator Omnirad 819: acylphosphine oxide photopolymerization initiator (manufactured by IGM Resins B.V.). Solvents DMF: N,N-dimethylformamide. Toluene: toluene. MEK: methyl ethyl ketone. Methyl acetate: methyl acetate. THF: tetrahydrofuran. PGME: propylene glycol monomethyl ether. DAA: diacetone alcohol. Acetone: acetone. PGMEA: propylene glycol monomethyl ether acetate. Cyclohexanone: cyclohexanone. 2-phenoxyethanol: 2-phenoxyethanol. Cyclohexane: cyclohexane. Propylene carbonate: propylene carbonate.

[0135] The solubility parameters and boiling points of the organic solvent and colorant are as follows:

[0136]

[0137]

[0138]

[0139]

[0140]

[0141] Additive D1781: Singlet oxygen quencher, bis(dibutyldithiocarbamate)nickel(II), product code D1781 (manufactured by Tokyo Chemical Industry Co., Ltd.) [Formation of Colored Layer] The colored layer-forming compositions shown in Tables 5 to 7 were applied to the transparent substrate and dried in an oven at 80°C for 60 seconds. Thereafter, an ultraviolet irradiation device was used to apply an irradiation dose of 150 mJ / cm. ２ The coating film was cured by irradiating it with ultraviolet light using a light source H bulb (manufactured by Fusion UV Systems Japan Co., Ltd.), to form a colored layer so that the film thickness after curing was 5.0 μm. Tinuvin 479: ultraviolet absorber, Tinuvin (registered trademark) 479 (manufactured by BASF Japan Ltd., molecular weight 482). LA-36: ultraviolet absorber, Adekastab (registered trademark) LA-36 (manufactured by ADEKA Corporation, molecular weight 315).

[0142] ≪Results≫ [Solubility, storage stability, coating scratch resistance evaluation results]

[0143]

[0144]

[0145]

[0146] In Table 16, the boiling point marked with "*1" indicates the highest boiling point among the solvent compositions of the corresponding formulation. In Table 16, the scratch resistance marked with "*2" was confirmed by applying the coating liquid to a TAC substrate, exposing it to light, and curing it.

[0147] Examples 1 to 6 and Comparative Examples 1 to 3 confirmed that when the solubility index (R) was less than 8.3, the coating liquid exhibited good solubility without residue and also had good storage stability. Examples 1 to 6 and Comparative Example 3 confirmed that when a solvent with a boiling point of less than 170°C was used, the scratch resistance of the coating film was good. All Examples and Comparative Examples confirmed that when R<8.3 and a boiling point of less than 170°C were satisfied, 0<δp<16 and δH<14 were satisfied. Examples 6 and 7-1 to 7-6 confirmed that solubility, storage stability, and scratch resistance were not affected by additives, resin composition, or additives.

[0148] [Optical property evaluation results / display properties]

[0149]

[0150]

[0151]

[0152] Examples 1 and 2 confirmed that reliability did not change depending on the type of solvent. Examples 3 and 6 confirmed that reliability was improved by incorporating a HALS resin into the colored layer. Examples 6 and 7-1 confirmed that reliability was further improved by incorporating a singlet oxygen quencher into the colored layer. Examples 7-1 to 7-4 confirmed that reliability did not change with changes in layer structure. Example 7-5 confirmed that a significant fading reduction effect was observed only when an ultraviolet absorbing layer was present on the colored layer. It was confirmed that reliability was achieved regardless of the type of substrate as long as the above conditions were met. Examples 7-1 and 7-6 confirmed that the use of an oxygen barrier layer improved the light resistance of the colored layer. The optical films of Examples 1 to 5, which included the colored layer of the present invention, had significantly lower reflectance characteristics than the optical film of Comparative Example 1, which did not have a colored layer. Furthermore, while it is said that transmittance is reduced by half with a circular polarizer, the luminance efficiency was excellent, as indicated by the evaluation value of white display transmittance, and color reproducibility was also improved. In Examples 1 to 5, the larger the absorption region, the better the reflectance characteristics. From Examples 4 and 5, it was confirmed that the use of pigments resulted in a reduction in the amount of dye used, thereby improving lightfastness.

[0153] <Evaluation Method> [Optical Film Property Evaluation Results: UV Shielding Rate, Confirmation of Residue After Dissolution, Confirmation of Storage Stability, Scratch Resistance, Reliability Test] (UV Shielding Rate) The layer configuration of the upper layer of the first functional layer of Examples 1 to 13 and Comparative Example 4 was formed on a glass substrate, and the layer was peeled off using cellophane tape conforming to the JIS-K5600 adhesion test. The transmittance was measured using an automatic spectrophotometer (Hitachi, Ltd., U-4100) with the adhesive tape (i.e., cellophane tape) as a reference. Using these transmittances, the average transmittance [%] in the ultraviolet range (290 nm to 400 nm) was calculated, and the UV Shielding Rate [%] was calculated by subtracting the average transmittance [%] in the ultraviolet range (290 nm to 400 nm) from 100%. The UV Shielding Rate is preferably 90% or more, more preferably 95% or more, and may be 100%. The ultraviolet shielding rate of the transparent substrate was calculated in the same manner as above by measuring the transmittance using an automatic spectrophotometer, with the value when nothing was placed as a reference.

[0154] (Confirmation of residue after dissolution) For each example, the formulation components were filled into a screw cap bottle (manufactured by Maruemu Co., Ltd., transparent), stirred for 60 minutes, and then allowed to stand for 5 minutes, after which the residue was visually confirmed. If no residue was visible, the result was rated as good (represented as "none" in Tables 14 to 16), and if residue was visible, the result was rated as poor (represented as "present" in Tables 14 to 16).

[0155] (Confirmation of storage stability) For each example, the formulation components were filled into a screw cap bottle (manufactured by Maruemu Co., Ltd., transparent), stirred for 60 minutes, filtered through a syringe filter with a pore size of 5 μm (manufactured by Membrane Solutions Limited, hydrophobic), and allowed to stand for 5 days, after which the presence or absence of precipitation was confirmed. Cases where no precipitation was observed with the naked eye were rated as good (represented as "◯" in Tables 14 to 16), and cases where residue was observed with the naked eye were rated as poor (represented as "X" in Tables 14 to 16).

[0156] (Abrasion Resistance Test) A piece of steel wool (Bonstar No. 000 manufactured by Nippon Steel Wool Co., Ltd.) measuring 8 cm in length and 1 cm in width was used as the abrasion area, and was fixed to the tip of the arm of an abrasion resistance tester (AB-301 manufactured by Tester Sangyo Co., Ltd.). The abrasion resistance tester had an arm, a main body that received the base end of the arm and drove the base end to swing at least the tip end, and a load application unit for applying a load to the tip of the arm. In this case, the load application unit was a weight placement unit provided above the tip of the arm and a 250 g (gram) weight. By placing the weight on the weight placement unit, a load of 250 g was applied to the abrasion area fixed to the tip of the arm. Then, the abrasion area was reciprocated 10 times over the surface of the colored layer of each film at a speed of one reciprocation per second (13 cm one way), and rubbed against the surface of the colored layer of each film, thereby causing a scratch on the surface. If the number of scratches observed on the film surface after the scratch test was 10 or less, it was rated as good (marked as "◯" in Tables 14 to 16), and if the number of scratches observed was 10 or more, it was rated as bad (marked as "X" in Tables 14 to 16).

[0157] (Lightfastness Test) A reliability test of the obtained optical film was carried out using a xenon weather meter tester (X75, manufactured by Suga Test Instruments Co., Ltd.) at a xenon lamp illuminance of 60 W / cm ２ (300 nm to 400 nm), the test was conducted for 120 hours under conditions of a temperature of 45°C and a humidity of 50% RH inside the tester. Transmittance measurements were conducted before and after the test using an automatic spectrophotometer (U-4100, manufactured by Hitachi, Ltd.), and the difference in ultraviolet shielding rate ΔT (290-400 nm) before and after the test was calculated. The closer the difference in ultraviolet shielding rate to zero, the better, with |ΔT (290-400 nm) | ≦ 10 being preferred, and |ΔT (290-400 nm) | ≦ 5 being even more preferred. In the case of optical films containing a colorant in the first functional layer, the difference in transmittance ΔTλ1 before and after the test at a wavelength λ1 that shows the minimum transmittance before the test in the wavelength range of 470 nm to 530 nm, and the difference in transmittance ΔTλ2 before and after the test at a wavelength λ2 that shows the minimum transmittance before the test in the wavelength range of 560 nm to 620 nm were also calculated. The transmittance difference is better when it is close to zero, and it is preferable that |ΔTλN|≦20 (N=1, 2), and more preferably that |ΔTλN|≦10 (N=1, 2).

[0158] [Display Device Characteristics] When the first functional layer does not contain a colorant, it is preferable that the display device characteristics change less compared to Comparative Example 1. On the other hand, when the first functional layer contains a colorant, it is preferable that the display device characteristics have more preferable values ​​among the characteristic values ​​shown below. (White Display Transmission Characteristics) The transmittance of the obtained optical film was measured using an automatic spectrophotometer (U-4100, manufactured by Hitachi, Ltd.), and this transmittance was used to calculate the efficiency of light transmitted through the optical film during white display, and evaluated as white display transmission characteristics. The efficiency was calculated as the ratio of the light intensity value at each wavelength of light transmitted through the optical film, when the light intensity at each wavelength during white display emitted from a white organic EL light source and output through a color filter was set to 100. The higher the light intensity ratio, the higher the luminance efficiency of the light source.

[0159] (Reflection characteristics of display device) The transmittance T(λ) and surface reflectance R2(λ) of the obtained optical film were measured using an automatic spectrophotometer (U-4100, manufactured by Hitachi, Ltd.). For the measurement of surface reflectance R2(λ), a matte black paint was applied to the surface of the triacetyl cellulose film of the transparent substrate on which the colored layer and functional layer were not formed to perform anti-reflection treatment, and the spectral reflectance was measured at an incident angle of 5°, and the surface reflectance R2(λ) was determined. Electrode reflectance R Ｅ The relative reflectance value, where (λ) is set to 100% for all wavelengths from 380 nm to 780 nm and the light intensity of reflected light reflected from a D65 light source without an optical film in place is set to 100, was calculated based on the following formulas (10) to (13) without taking into account the interface reflection and surface reflection at each layer, and was evaluated as the reflection characteristics of the display device. The lower the relative reflectance value, the lower the intensity of reflected light, and the higher the display quality.

[0160]

[0161]

[0162]

[0163]

[0164] (Color reproducibility) The transmittance of the obtained optical film was measured using an automatic spectrophotometer (U-4100, manufactured by Hitachi, Ltd.), and the NTSC ratio was calculated from the CIE1931 chromaticity value calculated using this transmittance and the red display, green display, and blue display spectra output through the organic EL light source and the color filter, and was evaluated as color reproducibility. The higher the NTSC ratio, the wider the color reproducibility and the more preferable it is.

[0165] (Schematic diagram of electrode reflection) FIG. 9 is an explanatory diagram of a method for calculating the reflection characteristics of the optical film of the present invention. As shown in FIG. 9, P Ｄ６５ (λ) is the spectrum of the D65 light source, R Ｅ (λ) represents the electrode reflectance, R1(λ) represents the internal reflection component, R2(λ) represents the surface reflectance, and R(λ) represents the sum of R1(λ) and R2(λ) and represents the reflectance. Also, reference numeral 60A represents the optical film, reference numeral 62 represents the transparent substrate, reference numeral 64a represents the optical film surface, reference numeral 64b represents the optical film back surface, reference numeral 61 represents the colored layer, reference numeral 63b represents the hard coat layer, and reference numeral 63a represents the low refractive index layer. While Figure 9 shows the layer structure of the optical film of Example 1, the same applies to other layer structures.

[0166] (Spectrum when displaying white using organic EL light source) FIG. 10 is a graph showing the spectrum when displaying white output through an organic EL light source and a color filter in the example.

[0167] (Spectra when displaying each color using organic EL light source) FIG. 11 is a graph showing the spectra when displaying red, green, and blue output through an organic EL light source and color filters in the example.

[0168] Although not described in the above examples, the following compositions for forming a colored layer that have already been produced or will be produced in the future can also be produced based on common technical knowledge in the same manner as in the above examples, thereby achieving the same effects.

[0169]

[0170]

[0171] Although one embodiment and example of the present invention have been described in detail above, the present invention is not limited to a specific embodiment, and includes modifications and combinations of the configuration within the scope that does not deviate from the gist of the present invention.

[0172] According to the present invention, an optical film can be provided that has a colored layer that functions as a light-absorbing layer and that can maintain its functionality even during long-term use. Because the colored layer has specified spectral characteristics, by applying the optical film of the present invention to a display device such as a self-luminous display device, reflection by metal electrodes in bright places and external light-excited luminescence of the QD color conversion layer can be reduced.

[0173] REFERENCE SIGNS LIST 1 Display device 60, 60A, 60B, 60C, 60D Optical film 61 Colored layer 62 Transparent substrate 63 Functional layer 63a Low refractive index layer 63b Hard coat layer 63c Oxygen barrier layer 64a Optical film surface 64b Optical film back surface

Claims

1. A colored layer-forming composition comprising a colorant (A), a photopolymerizable compound (B), a photopolymerization initiator (C), and an organic solvent (D), wherein the organic solvent (D) has a solubility index [R] for the colorant (A) represented by the following formula (1) of less than 8.3: R = [4 × (δd - 17.8) ２ +(δp-8.4) ２ +(δh-5.1) ２ ] １／２ ... (1) [In formula (1), δd, δp, and δh represent the dispersion term, polar term, and hydrogen bond term in the Hansen solubility parameter, respectively, and the units are all (MPa) １／２ It is.] 2. The colored layer forming composition according to claim 1, wherein the colorant (A) comprises at least one of a first colorant, a second colorant, and a third colorant, wherein the first colorant has a maximum absorption wavelength in the range of 470 to 530 nm and an absorption spectrum half-width of 15 to 45 nm, the second colorant has a maximum absorption wavelength in the range of 560 to 620 nm and an absorption spectrum half-width of 15 to 55 nm, and the third colorant has a wavelength in the range of 380 to 780 nm at which the lowest transmittance is in the range of 650 to 780 nm.

3. The colored layer forming composition according to claim 2, further comprising a pigment having absorption in the visible light region of 380 to 780 nm.

4. The colored layer forming composition according to claim 1, wherein the boiling point of the organic solvent (D) is lower than 170°C.

5. The colored layer forming composition according to claim 1, wherein the organic solvent (D) satisfies at least one of the following formulas (2) and (3): 0<δp<16 (2) δh<14 (3) 6. The colored layer-forming composition according to claim 1, further comprising at least one additive (E) selected from the group consisting of a radical scavenger, a singlet oxygen quencher, and a peroxide decomposer.

7. The colored layer forming composition according to claim 6, wherein the radical scavenger comprises a polymer containing a structural unit represented by the following formula (4): [In the above formula (2), R １２ represents a hydrogen atom, a halogen atom, a carboxyl group, a sulfo group, a cyano group, a hydroxy group, an alkyl group having 10 or less carbon atoms, an alkoxycarbonyl group having 10 or less carbon atoms, an alkylsulfonylaminocarbonyl group having 10 or less carbon atoms, an arylsulfonylaminocarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylaminosulfonyl group having 10 or less carbon atoms, an alkoxy group having 10 or less carbon atoms, an alkylthio group having 10 or less carbon atoms, an aryloxy group having 10 or less carbon atoms, a nitro group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an acyloxy group having 10 or less carbon atoms, an acyl group having 10 or less carbon atoms, a carbamoyl group, a sulfamoyl group, an aryl group having 10 or less carbon atoms, a substituted amino group, a substituted ureido group, a substituted phosphono group, or a heterocyclic group; R １３ represents a hydrogen atom or an alkyl group having 30 or less carbon atoms, and X represents a single bond, an ester group, an aliphatic alkyl chain having 30 or less carbon atoms, an aromatic chain, a polyethylene glycol chain, or a linking group formed by combining these, all of which may contain a spirodioxane ring.] 8. The composition for forming a colored layer according to claim 6, wherein the singlet oxygen quencher comprises at least one selected from the group consisting of dialkyldithiophosphates, dialkyldithiocarbanates, benzenedithiols, transition metal complexes thereof, and compounds represented by the following formula (5): [In the above formula (5), R １ each independently represents an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, R ９ CO-, R １０ SO ２ - or R １１ represents NHCO—, and R ９ , R １０ and R １１ each independently represents an alkyl group, an alkenyl group, an aryl group, or a heterocyclic group; R ２ and R ３ each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, or an alkenyloxy group; R ４ ~R ８ each independently represents a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group.

9. The composition for forming a colored layer according to claim 2, wherein the colorant (A) comprises at least one compound selected from the group consisting of compounds having any of a porphyrin structure, a merocyanine structure, a phthalocyanine structure, an azo structure, a cyanine structure, a squarylium structure, a coumarin structure, a polyene structure, a quinone structure, a tetraazaporphyrin structure, a pyrromethene structure, and an indigo structure, and metal complexes thereof.

10. An optical film comprising: a colored layer that is a cured product of the colored layer-forming composition according to claim 1; a transparent substrate located on one side of the colored layer; and a functional layer located on one or the other side of the colored layer, wherein the ultraviolet ray blocking rate of one or both of the transparent substrate and the functional layer is 85% or more as measured in accordance with the method described in JIS L1925.

11. The optical film according to claim 10, wherein the functional layer includes at least one of an antireflection layer and an antiglare layer.

12. The functional layer has an oxygen permeability of 10 cm ３ / (m ２ 11. The optical film of claim 10, comprising an oxygen barrier layer having a viscosity of 1000 psi (1000 psi) or less.

13. The optical film according to claim 10, wherein the functional layer includes at least one of an antistatic layer and an antifouling layer.

14. A display device comprising the optical film according to claim 10.

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