Cured film and display device

Abstract

To provide a cured film of a curable composition containing semiconductor particles which reduces surface roughness, and a display device including the cured film.SOLUTION: A cured film of a curable composition containing semiconductor particles (A) and a resin has Martens hardness of 5 MPa or more and 95 MPa or less. Preferably, the acid value of the resin (C) is 150 mg-KOH / g or less, and a mass ratio (A / C) of the semiconductor particles (A) to the resin (C) is 0.6 or more and less than 10.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a cured film and a display device including the cured film.

Background Art

[0002] Patent Document 1 discloses a cured film of a curable composition containing quantum dots (A) and a photopolymerizable compound (B), wherein the Martens hardness of the cured film is greater than 0.10 GPa.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a cured film containing semiconductor particles such as quantum dots, those with a small surface roughness may be required. Therefore, an object of the present invention is to provide a cured film of a curable composition containing semiconductor particles, the cured film having a small surface roughness, and a display device including the cured film.

Means for Solving the Problems

[0005] The present invention that achieves the above problems is as follows. [1] A cured film of a curable composition containing semiconductor particles (A) and a resin (C), wherein the Martens hardness is 5 MPa or more and 95 MPa or less. [2] The cured film according to [1], wherein the acid value of the resin (C) is 150 mg-KOH / g or less. [3] The cured film according to [1] or [2], wherein the mass ratio (A / C) of the semiconductor particles (A) to the resin (C) is 0.6 or more and less than 10. [4] The cured film according to any one of [1] to [3], wherein the curable composition further contains a polymerizable compound (D). [5] The cured film according to [4], wherein the polymerizable compound (D) contains a polymerizable compound having one or more cyclic hydrocarbon groups and two ethylenically unsaturated bonds in one molecule. [6] The cured film according to any one of [1] to [5], wherein the curable composition further contains a light scattering agent (B). [7] A display device including the cured film according to any one of [1] to [6].

Effects of the Invention

[0006] According to the present invention, there can be provided a cured film of a curable composition containing semiconductor particles, the cured film having a small surface roughness, and a display device including the cured film.

Modes for Carrying Out the Invention

[0007] <<Cured Film>> The present invention relates to a cured film of a curable composition containing semiconductor particles (A) and a resin (C), and the cured film has a Martens hardness of 5 MPa or more and 95 MPa or less. The cured film having a relatively low Martens hardness as described above can reduce the surface roughness of the cured film, presumably because the shrinkage during curing is suppressed. The cured film of the present invention containing semiconductor particles (A) can emit light having a wavelength different from that of the irradiated light by irradiating ultraviolet light or visible light. Therefore, the cured film of the present invention containing semiconductor particles (A) can be used as a wavelength conversion film.

[0008] The Martens hardness is preferably 80 MPa or less, more preferably 70 MPa or less, still more preferably 60 MPa or less, and may be 10 MPa or more or 15 MPa or more. The cured film having a Martens hardness within the above range can prevent a decrease in the emission light intensity when the cured film is used as a wavelength conversion film, and has excellent flexibility, so that when laminated with another layer, it can easily follow the shape of the other layer, thereby improving the adhesion at the interface.

[0009] The cured film of the present invention can have an arithmetic mean roughness of the surface of less than 8.5 nm, preferably 7 nm or less, more preferably 6 nm or less, still more preferably 5 nm or less, and the lower limit is not particularly limited and may be 1 nm.

[0010] The film thickness of the cured film is, for example, 0.5 μm or more and 10 μm or less, preferably 1 μm or more and 9 μm or less, more preferably 1.5 μm or more and 7 μm or less, and still more preferably 2 μm or more and 5 μm or less.

[0011] The fluorescence emission intensity measured by the procedure shown in the examples described below is 400 (mW·sr ―1 ·m ―2 ) or more, preferably 500 (mW·sr ―1 ·m ―2 ) or more, more preferably 700 (mW·sr ―1 ·m ―2 ) or more, and the upper limit is not particularly limited and may be 1500 (mW·sr ―1 ·m ―2 ) or less.

[0012] <<Curable Composition>> The curable composition preferably contains, in addition to semiconductor particles (A) and resin (C), at least one selected from an organic ligand (G), a light scattering agent (B), a polymerizable compound (D), a polymerization initiator (E), a light stabilizer (F), a leveling agent (H), and a solvent (J) as required.

[0013] In this specification, the compounds exemplified as each component can be used alone or in combination of two or more without particular notice. Further, when a plurality of types of each component are used, the content can be adjusted by the total amount of the plurality of types without particular notice.

[0014] <Semiconductor Particles (A)> The semiconductor particles (A) are preferably luminescent inorganic semiconductor particles that absorb primary light and emit light with a wavelength different from that of the primary light. More preferably, the luminescent inorganic semiconductor particles absorb primary light and emit green or red light. Even more preferably, the wavelength of the blue primary light is converted to the wavelength of red light or green light.

[0015] In this specification, "blue" refers to all light visually recognized as blue (all light having intensity in the blue wavelength range, for example, light having intensity in the range of 380 nm to 495 nm), and is not limited to light of a single wavelength. "Green" refers to all light visually recognized as green (all light having intensity in the green wavelength range, for example, light having intensity in the range of 495 nm to 585 nm), and is not limited to light of a single wavelength. "Red" refers to all light visually recognized as red (all light having intensity in the red wavelength range, for example, light having intensity in the range of 585 nm to 780 nm), and is not limited to light of a single wavelength.

[0016] Examples of the semiconductor particles (A) include particles composed of quantum dots and compounds having a perovskite crystal structure (hereinafter also referred to as "perovskite compounds"), and preferably quantum dots. Quantum dots are luminescent inorganic semiconductor fine particles having a particle diameter of 1 nm or more and 100 nm or less, and are fine particles that utilize the bandgap of a semiconductor and absorb ultraviolet light or visible light (for example, blue light) to emit light.

[0017] Examples of quantum dots include compounds of group 12 elements and group 16 elements such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdHgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe; compounds of group 13 elements and group 15 elements such as GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, GaNP, GaNAs, GaPAs, AlNP, AlNAs, AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GaInNP, GaInNAs, GaInPAs, InAlNP, InAlNAs, InAlPAs; compounds of group 14 elements and group 16 elements such as PdS, PbSe, etc.

[0018] When the quantum dots contain S or Se, quantum dots surface-modified with metal oxides or organic substances may be used. By using surface-modified quantum dots, it is possible to prevent S or Se from being extracted by reaction components contained or possibly contained in the curable composition.

[0019] Also, the quantum dots may form a core-shell structure by combining the above compounds. Examples of such combinations include fine particles with a core of CdSe and a shell of ZnS, and fine particles with a core of InP and a shell of ZnSeS.

[0020] Since the energy state of quantum dots depends on their size, it is possible to freely select the emission wavelength by changing the particle size. Also, since the emission light from quantum dots has a narrow spectral width, it is advantageous for widening the color gamut of display devices. Furthermore, since quantum dots have high responsiveness, they are also advantageous in terms of the utilization efficiency of primary light.

[0021] The perovskite compound is a compound having a perovskite-type crystal structure and containing A, B, and X as components.

[0022] A is a component located at each vertex of the hexahedron centered on B in the perovskite-type crystal structure and is a monovalent cation.

[0023] X represents a component located at each vertex of the octahedron centered on B in the perovskite-type crystal structure and is at least one ion selected from the group consisting of halide ions and thiocyanate ions.

[0024] B is a component located at the center of the hexahedron with A at the vertices and the octahedron with X at the vertices in the perovskite-type crystal structure and is a metal ion.

[0025] The perovskite compound containing A, B, and X as components is not particularly limited and may be a compound having any of a three-dimensional structure, a two-dimensional structure, and a pseudo-two-dimensional structure.

[0026] In the case of a three-dimensional structure, the perovskite compound is represented by ABX (3+δ) as shown.

[0027] In the case of a two-dimensional structure, the perovskite compound is represented by A2BX (4+δ) as shown.

[0028] Here, δ is a number that can be appropriately changed according to the charge balance of B and is between -0.7 and 0.7 inclusive.

[0029] Examples of preferred specific perovskite compounds having a three-dimensional perovskite-type crystal structure represented by ABX (3+δ) include CH3NH3PbBr3, CH3NH3PbCl3, CH3NH3PbI3, CH3NH3PbBr (3-y) I y (0 < y < 3), CH3NH3PbBr (3-y) Cly (0 < y < 3), (H2N=CH-NH2)PbBr3, (H2N=CH-NH2)PbCl3, (H2N=CH-NH2)PbI3, CH3NH3Pb (1-a) Ca a Br3(0 < a ≤ 0.7), CH3NH3Pb (1-a) Sr a Br3(0 < a ≤ 0.7), CH3NH3Pb (1-a) La a Br (3+δ) (0 < a ≤ 0.7, 0 < δ ≤ 0.7), CH3NH3Pb (1-a) Ba a Br3(0 < a ≤ 0.7), CH3NH3Pb (1-a) Dy a Br (3+δ) (0 < a ≤ 0.7, 0 < δ ≤ 0.7), CH3NH3Pb (1-a) Na a Br (3+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), CH3NH3Pb (1-a) Li a Br (3+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), CsPb (1-a) Na a Br (3+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), CsPb (1-a) Li a Br (3+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), CH3NH3Pb (1-a) Na a Br (3+δ-y) I y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 3), CH3NH3Pb (1-a) Li a Br (3+δ-y) I y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 3), CH3NH3Pb (1-a) Na a Br (3+δ-y) Cl y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 3), CH3NH3Pb (1-a) Li a Br (3+δ-y)Cl y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 3), (H2N=CH-NH2)Pb (1-a) Na a Br (3+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), (H2N=CH-NH2)Pb (1-a) Li a Br (3+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), (H2N=CH-NH2)Pb (1-a) Na a Br (3+δ-y) I y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 3), (H2N=CH-NH2)Pb (1-a) Na a Br (3+δ-y) Cl y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 3), CsPbBr3, CsPbCl3, CsPbI3, CsPbBr (3-y) I y (0 < y < 3), CsPbBr (3-y) Cl y (0 < y < 3), CH3NH3PbBr (3-y) Cl y (0 < y < 3), CH3NH3Pb (1-a) Zn a Br3(0 < a ≤ 0.7), CH3NH3Pb (1-a) Al a Br (3+δ) (0 < a ≤ 0.7, 0 ≤ δ ≤ 0.7), CH3NH3Pb (1-a) Co a Br3(0 < a ≤ 0.7), CH3NH3Pb (1-a) Mn a Br3(0 < a ≤ 0.7), CH3NH3Pb (1-a) Mg a Br3(0 < a ≤ 0.7), CsPb (1-a) Zn a Br3(0 < a ≤ 0.7), CsPb (1-a) Al a Br (3+δ) (0 < a ≤ 0.7, 0 < δ ≤ 0.7), CsPb (1-a) Co aBr3(0 < a ≤ 0.7), CsPb (1-a) Mn a Br3(0 < a ≤ 0.7), CsPb (1-a) Mg a Br3(0 < a ≤ 0.7), CH3NH3Pb (1-a) Zn a Br (3-y) I y (0 < a ≤ 0.7, 0 < y < 3), CH3NH3Pb (1-a) Al a Br (3+δ-y) I y (0 < a ≤ 0.7, 0 < δ ≤ 0.7, 0 < y < 3), CH3NH3Pb (1-a) Co a Br (3-y) I y (0 < a ≤ 0.7, 0 < y < 3), CH3NH3Pb (1-a) Mn a Br (3-y) I y (0 < a ≤ 0.7, 0 < y < 3), CH3NH3Pb (1-a) Mg a Br (3-y) I y (0 < a ≤ 0.7, 0 < y < 3), CH3NH3Pb (1-a) Zn a Br (3-y) Cl y (0 < a ≤ 0.7, 0 < y < 3), CH3NH3Pb (1-a) Al a Br (3+δ-y) Cl y (0 < a ≤ 0.7, 0 < δ ≤ 0.7, 0 < y < 3), CH3NH3Pb (1-a) Co a Br (3+δ-y) Cl y (0 < a ≤ 0.7, 0 < y < 3), CH3NH3Pb (1-a) Mn a Br (3-y) Cl y (0 < a ≤ 0.7, 0 < y < 3), CH3NH3Pb (1-a) Mg a Br (3-y) Cl y (0 < a ≤ 0.7, 0 < y < 3), (H2N=CH-NH2)Zn aBr3 (0 < a ≤ 0.7), (H2N=CH-NH2)Mg a Br3 (0 < a ≤ 0.7), (H2N=CH-NH2)Pb (1-a) Zn a Br (3-y) I y (0 < a ≤ 0.7, 0 < y < 3), (H2N=CH-NH2)Pb (1-a) Zn a Br (3-y) Cl y (0 < a ≤ 0.7, 0 < y < 3), etc. can be mentioned.

[0030] A perovskite compound, A2BX (4+δ) As a preferable specific example of a compound having a two-dimensional perovskite crystal structure represented by (C4H9NH3)2PbBr4, (C4H9NH3)2PbCl4, (C4H9NH3)2PbI4, (C7H 15 NH3)2PbBr4, (C7H 15 NH3)2PbCl4, (C7H 15 NH3)2PbI4, (C4H9NH3)2Pb (1-a) Li a Br (4+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), (C4H9NH3)2Pb (1-a) Na a Br (4+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), (C4H9NH3)2Pb (1-a) Rb a Br (4+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), (C7H 15 NH3)2Pb (1-a) Na a Br (4+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), (C7H 15 NH3)2Pb (1-a) Li a Br (4+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), (C7H 15 NH3)2Pb (1-a) RbaBr (4+δ) (0 < a ≤ 0.7, -0.7 ≤ δ < 0), (C4H9NH3)2Pb(1-a) Na a Br (4+δ-y) I y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 4), (C4H9NH3)2Pb (1-a) Li a Br (4+δ-y) I y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 4), (C4H9NH3)2Pb (1-a) Rb a Br (4+δ-y) I y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 4), (C4H9NH3)2Pb (1-a) Na a Br (4+δ-y) Cl y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 4), (C4H9NH3)2Pb (1-a) Li a Br (4+δ-y) Cl y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 4), (C4H9NH3)2Pb (1-a) Rb a Br (4+δ-y) Cl y (0 < a ≤ 0.7, -0.7 ≤ δ < 0, 0 < y < 4), (C4H9NH3)2PbBr4, (C7H 15 NH3)2PbBr4, (C4H9NH3)2PbBr (4-y) Cl y (0 < y < 4), (C4H9NH3)2PbBr (4-y) I y (0 < y < 4), (C4H9NH3)2Pb (1-a) Zn a Br4(0 < a ≤ 0.7), (C4H9NH3)2Pb (1-a) Mg a Br4(0 < a ≤ 0.7), (C4H9NH3)2Pb (1-a) Co a Br4(0 < a ≤ 0.7), (C4H9NH3)2Pb (1-a) Mn a Br4(0 < a ≤ 0.7), (C7H 15 NH3)2Pb(1-a) Zn a Br4(0 < a ≤ 0.7), (C7H 15 (NH3)2Pb (1-a) Mg a Br4(0 < a ≤ 0.7), (C7H 15 (NH3)2Pb (1-a) Co a Br4(0 < a ≤ 0.7), (C7H 15 (NH3)2Pb (1-a) Mn a Br4(0 < a ≤ 0.7), (C4H9NH3)2Pb (1-a) Zn a Br (4-y) I y (0 < a ≤ 0.7, 0 < y < 4), (C4H9NH3)2Pb (1-a) Mg a Br (4-y) I y (0 < a ≤ 0.7, 0 < y < 4), (C4H9NH3)2Pb (1-a) Co a Br (4-y) I y (0 < a ≤ 0.7, 0 < y < 4), (C4H9NH3)2Pb (1-a) Mn a Br (4-y) I y (0 < a ≤ 0.7, 0 < y < 4), (C4H9NH3)2Pb (1-a) Zn a Br (4-y) Cl y (0 < a ≤ 0.7, 0 < y < 4), (C4H9NH3)2Pb (1-a) Mg a Br (4-y) Cl y (0 < a ≤ 0.7, 0 < y < 4), (C4H9NH3)2Pb (1-a) Co a Br (4-y) Cl y (0 < a ≤ 0.7, 0 < y < 4), (C4H9NH3)2Pb (1-a) Mn a Br (4-y) Cl y (0 < a ≤ 0.7, 0 < y < 4), etc. can be mentioned.

[0031] The content rate of the semiconductor particles (A) in the curable composition is preferably 3 mass% or more and 60 mass% or less, more preferably 10 mass% or more and 55 mass% or less, still more preferably 20 mass% or more and 50 mass% or less, and particularly preferably 30 mass% or more and 50 mass% or less with respect to 100 mass% of the solid content of the curable composition.

[0032] In this specification, the total amount of the solid content in the curable composition means the total of the components contained in the curable composition excluding the solvent (J). The content rate in the solid content of the curable composition can be measured by known analysis means such as liquid chromatography or gas chromatography. The content rate of each component in the solid content of the curable composition may be calculated from the formulation at the time of preparing the curable composition.

[0033] <Organic ligand (G)> The semiconductor particles (A) may be present in the curable composition in a state where the organic ligand (G) is coordinated. The organic ligand (G) is, for example, an organic compound having a polar group exhibiting a coordination ability with respect to the semiconductor particles (A). The organic ligand (G) can be coordinated on the surface of the semiconductor particles (A), for example. The curable composition can contain one or more organic ligands (G).

[0034] It is preferable that at least a part of the molecules of the organic ligand (G) are coordinated to the semiconductor particles (A), and all or almost all of the molecules may be coordinated to the semiconductor particles (A). Containing the organic ligand (G) coordinated to the semiconductor particles (A) can be advantageous from the viewpoints of improving the stability and dispersibility of the semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer.

[0035] The polar group of the organic ligand (G) is, for example, at least one group selected from the group consisting of a thiol group (-SH), a carboxy group (-COOH), and an amino group (-NH2). The polar group selected from this group can be advantageous in enhancing the coordination property to the semiconductor particles (A). High coordination property can contribute to improving the stability and dispersibility of the semiconductor particles (A) in the curable composition, and improving the emission intensity when the cured film is used as a wavelength conversion layer. Among them, it is more preferable that the polar group is at least one group selected from the group consisting of a thiol group and a carboxy group. The organic ligand (G) may have one or more polar groups.

[0036] The organic ligand (G) is, for example, the following formula (x): X A -R X (x) and can be an organic compound represented by the formula. In the formula, X A is the above polar group, and R X is a monovalent hydrocarbon group which may contain a hetero atom (N, O, S, halogen atom, etc.). The hydrocarbon group may have one or more unsaturated bonds such as a carbon-carbon double bond. The hydrocarbon group may have a linear, branched or cyclic structure. The number of carbon atoms of the hydrocarbon group is, for example, 1 or more and 40 or less, and may be 1 or more and 30 or less. The methylene group contained in the hydrocarbon group may be substituted with -O-, -S-, -C(=O)-, -C(=O)-O-, -O-C(=O)-, -C(=O)-NH-, -NH-, etc.

[0037] Group R X may contain a polar group. For specific examples of the polar group, the above description regarding the polar group X A is cited.

[0038] Polar group X ASpecific examples of the organic ligand having a carboxy group include formic acid, acetic acid, propionic acid, and saturated or unsaturated fatty acids. Specific examples of the saturated or unsaturated fatty acids include saturated fatty acids such as butyric acid, pentanoic acid, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, pentadecanoic acid, palmitic acid, margaric acid, stearic acid, arachidic acid, behenic acid, lignoceric acid; monounsaturated fatty acids such as myristoleic acid, palmitoleic acid, oleic acid, eicosenoic acid, erucic acid, nervonic acid; and polyunsaturated fatty acids such as linoleic acid, α-linolenic acid, γ-linolenic acid, stearidonic acid, dihomo-γ-linolenic acid, arachidonic acid, eicosatetraenoic acid, docosadienoic acid, adrenic acid (eicosatetraenoic acid).

[0039] Polar group X A Specific examples of the organic ligand having a thiol group or an amino group include the polar group X exemplified above. A The organic ligand having a carboxy group as the organic ligand having a carboxy group includes an organic ligand in which the carboxy group is replaced with a thiol group or an amino group.

[0040] In addition to the above, examples of the organic ligand represented by the above formula (x) include compound (G-1) and compound (G-2).

[0041] [Compound (G-1)] Compound (G-1) is a compound having a first functional group and a second functional group. The first functional group is a carboxy group (-COOH), and the second functional group is a carboxy group or a thiol group (-SH). Since compound (G-1) has a carboxy group and / or a thiol group, it can be a ligand that coordinates to the semiconductor particles (A). The curable composition may contain only one kind of compound (G-1) or two or more kinds thereof.

[0042] An example of compound (G-1) is a compound represented by the following formula (G-1a). Compound (G-1) may be an acid anhydride of the compound represented by formula (G-1a).

[0043] [Chemical formula]

[0044] [In the formula, R B represents a divalent hydrocarbon group. When a plurality of R B are present, they may be the same or different. The hydrocarbon group may have one or more substituents. When a plurality of substituents are present, they may be the same or different, and they may be bonded to each other to form a ring together with the atoms to which they are each bonded. -CH2- contained in the hydrocarbon group may be replaced by at least one of -O-, -S-, -SO2-, -CO- and -NH-. p represents an integer of 1 to 10.]

[0045] Examples of the divalent hydrocarbon group represented by R B include, for example, a chain hydrocarbon group, an alicyclic hydrocarbon group, an aromatic hydrocarbon group, etc., and groups combining these.

[0046] Examples of the chain hydrocarbon group include a linear or branched alkanediyl group, the number of carbon atoms of which is usually 1 to 50, preferably 1 to 20, more preferably 1 to 10. Examples of the alicyclic hydrocarbon group include a monocyclic or polycyclic cycloalkanediyl group, the number of carbon atoms of which is usually 3 to 50, preferably 3 to 20, more preferably 3 to 10. Examples of the aromatic hydrocarbon group include a monocyclic or polycyclic arenediyl group, the number of carbon atoms of which is usually 6 to 20.

[0047] Examples of the substituent that the hydrocarbon group may have include, for example, an alkyl group having 1 to 50 carbon atoms, a cycloalkyl group having 3 to 50 carbon atoms, an aryl group having 6 to 20 carbon atoms, a carboxy group, an amino group, a halogen atom, etc. The substituent that the hydrocarbon group may have is preferably a carboxy group, an amino group or a halogen atom.

[0048] When -CH2- contained in the hydrocarbon group is replaced by at least one of -O-, -CO- and -NH-, -CH2- is preferably replaced by at least one of -CO- and -NH-, more preferably -NH-. p is preferably 1 or 2.

[0049] Examples of the compound represented by the formula (G-1a) include compounds represented by the following formulas (1-1) to (1-9).

[0050]

Chemical formula

[0051] Specific examples of the compound represented by the formula (G-1a) shown by chemical names include, for example, mercaptoacetic acid, 2-mercaptopropionic acid, 3-mercaptopropionic acid, 3-mercaptobutanoic acid, 4-mercaptobutanoic acid, mercaptosuccinic acid, mercaptostearic acid, mercaptooctanoic acid, 4-mercaptobenzoic acid, 2,3,5,6-tetrafluoro-4-mercaptobenzoic acid, L-cysteine, N-acetyl-L-cysteine, 3-mercaptopropionic acid 3-methoxybutyl, 3-mercapto-2-methylpropionic acid and the like. Among them, 3-mercaptopropionic acid and mercaptosuccinic acid are preferred.

[0052] Another example of the compound (G-1) is a polycarboxylic acid compound, preferably a compound (G-1b) in which -SH in the formula (G-1a) is replaced by a carboxy group (-COOH) in the compound represented by the above formula (G-1a).

[0053] Examples of the compound (G-1b) include the following compounds.

[0054] Succinic acid, glutaric acid, adipic acid, octafluoroadipic acid, azelaic acid, dodecanedioic acid, tetradecanedioic acid, hexadecanedioic acid, heptadecanedioic acid, octadecanedioic acid, nonadecanedioic acid, dodecafluorosuberic acid, 3-ethyl-3-methylglutaric acid, hexafluoroglutaric acid, trans-3-hexenedioic acid, sebacic acid, hexadecafluorosebacic acid, acetylenedicarboxylic acid, trans-aconitic acid, 1,3-adamantanedicarboxylic acid, bicyclo[2.2.2]octane-1,4-dicarboxylic acid, cis-4-cyclohexene-1,2-dicarboxylic acid, 1,1-cyclopropanedicarboxylic acid, 1,1-Cyclobutanedicarboxylic acid, cis- or trans-1,3-cyclohexanedicarboxylic acid, cis- or trans-1,4-cyclohexanedicarboxylic acid, 1,1-cyclopentanediacetic acid, 1,2,3,4-cyclopentanetetracarboxylic acid, decahydro-1,4-naphthalenedicarboxylic acid, 2,3-norbornanedicarboxylic acid, 5-norbornene-2,3-dicarboxylic acid, phthalic acid, 3-fluorophthalic acid, isophthalic acid, tetrafluoroisophthalic acid, terephthalic acid, tetrafluoroterephthalic acid, 2,5-dimethylterephthalic acid, 2,6-naphthalenedicarboxylic acid, 2,3-naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 1,1'-ferrocenedicarboxylic acid, 2,2'-biphenyldicarboxylic acid, 4,4'-biphenyldicarboxylic acid, 2,5-furandicarboxylic acid, benzophenone-2,4'-dicarboxylic acid monohydrate, benzophenone-4,4'-dicarboxylic acid, 2,3-pyrazinedicarboxylic acid, 2,3-pyridinedicarboxylic acid, 2,4-pyridinedicarboxylic acid, 3,5-pyridinedicarboxylic acid, 2,5-pyridinedicarboxylic acid, 2,6-pyridinedicarboxylic acid, 3,4-pyridinedicarboxylic acid, pyrazole-3,5-dicarboxylic acid monohydrate, 4,4'-stilbenedicarboxylic acid, anthraquinone-2,3-dicarboxylic acid, 4-(carboxymethyl)benzoic acid, cerylonic acid monohydrate, azobenzene-4,4'-dicarboxylic acid, azobenzene-3,3'-dicarboxylic acid, chlorendic acid, 1H-imidazole-4,5-dicarboxylic acid, 2,2-bis(4-carboxyphenyl)hexafluoropropane, 1,10-bis(4-carboxyphenoxy)decane, dipropylmalonic acid, dithiodiglycolic acid, 3,3'-dithiodipropionic acid, 4,4'-dithiodibutyric acid, 4,4'-dicarboxydiphenyl ether, 4,4'-dicarboxydiphenyl sulfone, ethylene glycol bis(4-carboxyphenyl) ether, 3,4-ethylenedioxythiophene-2,5-dicarboxylic acid, 4,4'-isopropylidenediphenoxyacetic acid, 1,3-acetonedicarboxylic acid, methylenedisalicylic acid, 5,5'-thiodisalicylic acid, tris(2-carboxyethyl) isocyanurate, tetrafluorosuccinic acid, α,α,α',α'-tetramethyl-1,3-benzenedipropionic acid, 1,3,5-benzenetricarboxylic acid, etc.

[0055] From the viewpoint of improving the stability and dispersibility of the semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer, the molecular weight of the compound (G-1) is preferably 3,000 or less, more preferably 2,500 or less, still more preferably 2,000 or less, even more preferably 1,000 or less, particularly preferably 800 or less, and most preferably 500 or less. The molecular weight of the compound (G-1) is usually 100 or more.

[0056] The above molecular weight may be a number average molecular weight or a weight average molecular weight. In this case, the number average molecular weight and the weight average molecular weight are the number average molecular weight and the weight average molecular weight in terms of standard polystyrene measured by gel permeation chromatography (GPC), respectively.

[0057] When the curable composition contains the compound (G-1), the content ratio of the compound (G-1) to the semiconductor particles (A) in the curable composition is preferably 0.001 or more and 1 or less, more preferably 0.01 or more and 0.5 or less, still more preferably 0.02 or more and 0.45 or less, in terms of mass ratio. When the content ratio is within this range, it can be advantageous from the viewpoint of improving the stability and dispersibility of the semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer.

[0058] When the curable composition contains the compound (G-1), the content rate of the compound (G-1) in the curable composition is preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.2% by mass or more and 20% by mass or less, still more preferably 0.2% by mass or more and 10% by mass or less, even more preferably 0.5% by mass or more and 10% by mass or less, particularly preferably 0.5% by mass or more and 8% by mass or less, based on the total amount of the solid content of the curable composition, from the viewpoint of improving the stability and dispersibility of the semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer.

[0059] [Compound (G-2)] Compound (G-2) is a compound different from compound (G-1), which contains a polyalkylene glycol structure and has a polar group at the molecular terminal. The molecular terminal preferably refers to the terminal of the longest carbon chain in compound (G-2) (the carbon atoms in the carbon chain may be replaced by other atoms such as oxygen atoms).

[0060] The curable composition may contain only one kind of compound (G-2) or may contain two or more kinds. The curable composition may contain compound (G-1) or compound (G-2), or may contain both compound (G-1) and compound (G-2).

[0061] Note that the compound containing a polyalkylene glycol structure and having the above first functional group and second functional group shall belong to compound (G-1).

[0062] The polyalkylene glycol structure refers to the following formula:

[0063]

Chemical formula

[0064] represents the structure shown (n is an integer of 2 or more). In the formula, R C is an alkylene group, and examples thereof include an ethylene group and a propylene group.

[0065] As a specific example of compound (G-2), a polyalkylene glycol compound represented by the following formula (G-2a) can be mentioned.

[0066]

Chemical formula

[0067] In formula (G-2a), X is a polar group, Y is a monovalent group, and Z C is a divalent or trivalent group. n is an integer of 2 or more. m is 1 or 2. R C is an alkylene group.

[0068] The polar group X is preferably at least one group selected from the group consisting of a thiol group (-SH), a carboxy group (-COOH), and an amino group (-NH2). The polar group selected from this group can be advantageous in enhancing the coordination ability to the semiconductor particles (A). Among them, from the viewpoints of improving the stability and dispersibility of the semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer, the polar group X is more preferably at least one group selected from the group consisting of a thiol group and a carboxy group.

[0069] The group Y is a monovalent group. The group Y is not particularly limited, and examples thereof include a monovalent hydrocarbon group which may have substituents (such as N, O, S, and halogen atoms). -CH2- contained in the hydrocarbon group may be substituted with -O-, -S-, -C(=O)-, -C(=O)-O-, -O-C(=O)-, -C(=O)-NH-, -NH-, or the like. The carbon number of the hydrocarbon group is, for example, 1 or more and 12 or less. The hydrocarbon group may have an unsaturated bond.

[0070] Examples of the group Y include an alkyl group having a linear, branched, or cyclic structure and having 1 to 12 carbon atoms; an alkoxy group having a linear, branched, or cyclic structure and having 1 to 12 carbon atoms, and the like. The carbon number of the alkyl group and the alkoxy group is preferably 1 or more and 8 or less, more preferably 1 or more and 6 or less, and still more preferably 1 or more and 4 or less. -CH2- contained in the alkyl group and the alkoxy group may be substituted with -O-, -S-, -C(=O)-, -C(=O)-O-, -O-C(=O)-, -C(=O)-NH-, -NH-, or the like. Among them, the group Y is preferably a linear or branched alkoxy group having 1 to 4 carbon atoms, and more preferably a linear alkoxy group having 1 to 4 carbon atoms.

[0071] Group Y may contain a polar group. Examples of the polar group include at least one group selected from the group consisting of a thiol group (-SH), a carboxy group (-COOH), and an amino group (-NH2). However, as described above, a compound containing a polyalkylene glycol structure and having the above first functional group and second functional group shall belong to compound (G-1). The polar group is preferably located at the terminal of group Y.

[0072] Group Z C is a divalent or trivalent group. Group Z C is not particularly limited, and examples thereof include a divalent or trivalent hydrocarbon group which may contain a hetero atom (N, O, S, halogen atom, etc.). The number of carbon atoms of the hydrocarbon group is, for example, 1 or more and 24 or less. The hydrocarbon group may have an unsaturated bond.

[0073] Examples of divalent group Z C include an alkylene group having a linear, branched or cyclic structure and having 1 or more and 24 or less carbon atoms; an alkenylene group having a linear, branched or cyclic structure and having 1 or more and 24 or less carbon atoms, etc. The number of carbon atoms of the alkyl group and the alkenylene group is preferably 1 or more and 12 or less, more preferably 1 or more and 8 or less, and still more preferably 1 or more and 4 or less. -CH2- contained in the alkyl group and the alkenylene group may be substituted with -O-, -S-, -C(=O)-, -C(=O)-O-, -O-C(=O)-, -C(=O)-NH-, -NH-, etc. Examples of trivalent group Z C include a group obtained by removing one hydrogen atom from divalent group Z C described above.

[0074] Group Z C may have a branched structure. Group Z having a branched structure C may have a polyalkylene glycol structure different from the polyalkylene glycol structure shown in the above formula (G-2a) in a branch chain different from the branch chain containing the polyalkylene glycol structure shown in the above formula (G-2a).

[0075] Among them, base Z C is preferably a linear or branched alkylene group having 1 to 6 carbon atoms, and more preferably a linear alkylene group having 1 to 4 carbon atoms.

[0076] R C is an alkylene group, preferably a linear or branched alkylene group having 1 to 6 carbon atoms, and more preferably a linear alkylene group having 1 to 4 carbon atoms.

[0077] In formula (G-2a), n is an integer of 2 or more, preferably 2 or more and 540 or less, more preferably 2 or more and 120 or less, and still more preferably 2 or more and 60 or less.

[0078] The molecular weight of compound (G-2) can be, for example, about 150 or more and 10,000 or less. However, from the viewpoints of improving the stability and dispersibility of semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer, it is preferably 150 or more and 5,000 or less, and more preferably 150 or more and 4,000 or less. This molecular weight may be a number average molecular weight or a weight average molecular weight. In this case, the number average molecular weight and the weight average molecular weight are the number average molecular weight and the weight average molecular weight in terms of standard polystyrene measured by GPC, respectively.

[0079] When the curable composition contains compound (G-2), the content ratio of compound (G-2) to semiconductor particles (A) in the curable composition is preferably 0.001 or more and 2 or less, more preferably 0.01 or more and 1.5 or less, and still more preferably 0.1 or more and 1 or less in terms of mass ratio. When the content ratio is within this range, it can be advantageous from the viewpoints of improving the stability and dispersibility of semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer.

[0080] When the curable composition contains the compound (G-2), the content of the compound (G-2) in the curable composition is preferably 0.1% by mass or more and 40% by mass or less, more preferably 0.1% by mass or more and 20% by mass or less, still more preferably 1% by mass or more and 15% by mass or less, and even more preferably 2% by mass or more and 12% by mass or less, based on the total amount of the solid content of the curable composition, from the viewpoints of improving the stability and dispersibility of the semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer.

[0081] When the curable composition contains the organic ligand (G), the ratio of the content of the organic ligand (G) to the semiconductor particles (A) in the curable composition is preferably 0.001 or more and 1 or less, more preferably 0.01 or more and 0.8 or less, and still more preferably 0.02 or more and 0.5 or less, in terms of mass ratio. When the content ratio is within this range, it can be advantageous from the viewpoints of improving the stability and dispersibility of the semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer. Here, the content of the organic ligand (G) refers to the total content of all the organic ligands contained in the curable composition.

[0082] The total content ratio of the semiconductor particles (A) and the organic ligand (G) in the curable composition is preferably 10% by mass or more and 75% by mass or less, more preferably 12% by mass or more and 70% by mass or less, based on the total amount of the solid content of the curable composition, from the viewpoints of improving the stability and dispersibility of the semiconductor particles (A) and the emission intensity when the cured film is used as a wavelength conversion layer.

[0083] <Resin (C)> Examples of the resin (C) include the following resins [K1] to [K6] and the like.

[0084] Resin [K1]; a copolymer having a structural unit derived from at least one (a) selected from the group consisting of unsaturated carboxylic acids and unsaturated carboxylic acid anhydrides (hereinafter also referred to as "(a)") and a structural unit derived from a monomer (c) copolymerizable with (a) (however, different from (a)) (hereinafter also referred to as "(c)"); Resin [K2]; a copolymer having a structural unit derived from the above (a), a structural unit derived from the above (c), and a structural unit derived from a monomer (b) (hereinafter also referred to as "(b)") having a cyclic ether structure having 2 to 4 carbon atoms and an ethylenically unsaturated bond; Resin [K3]; a copolymer having a structural unit obtained by adding the above (b) to the structural unit derived from the above (a) and a structural unit derived from the above (c); Resin [K4]: a copolymer having a structural unit obtained by adding the above (b) to the structural unit derived from the above (a) and further ester-bonding a carboxylic anhydride, and a structural unit derived from the above (c). Resin [K5]; a copolymer having a structural unit obtained by adding the above (a) to the structural unit derived from the above (b) and a structural unit derived from the above (c); Resin [K6]; a copolymer having a structural unit obtained by adding the above (a) to the structural unit derived from the above (b) and further ester-bonding a carboxylic anhydride, and a structural unit derived from the above (c).

[0085] Examples of (a) include unsaturated monocarboxylic acids such as (meth) acrylic acid, crotonic acid, o-, m-, p-vinylbenzoic acid; unsaturated dicarboxylic acids such as maleic acid, fumaric acid, citraconic acid, mesaconic acid, itaconic acid, 3-vinylphthalic acid, 4-vinylphthalic acid, 3,4,5,6-tetrahydrophthalic acid, 1,2,3,6-tetrahydrophthalic acid, dimethyltetrahydrophthalic acid, 1,4-cyclohexenedicarboxylic acid; bicyclic unsaturated compounds containing a carboxy group such as methyl-5-norbornene-2,3-dicarboxylic acid, 5-carboxybicyclo[2.2.1]hept-2-ene, 5,6-dicarboxybicyclo[2.2.1]hept-2-ene, 5-carboxy-5-methylbicyclo[2.2.1]hept-2-ene, 5-carboxy-5-ethylbicyclo[2.2.1]hept-2-ene, 5-carboxy-6-methylbicyclo[2.2.1]hept-2-ene, 5-carboxy-6-ethylbicyclo[2.2.1]hept-2-ene; Unsaturated dicarboxylic acid anhydrides such as maleic anhydride, citraconic anhydride, itaconic anhydride, 3-vinylphthalic anhydride, 4-vinylphthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, 5,6-dicarboxybicyclo[2.2.1]hept-2-ene anhydride; Unsaturated mono[(meth)acryloyloxyalkyl] esters of divalent or higher polycarboxylic acids such as succinic acid mono[2-(meth)acryloyloxyethyl], phthalic acid mono[2-(meth)acryloyloxyethyl]; Unsaturated (meth)acrylates containing a hydroxy group and a carboxy group in the same molecule, such as α-(hydroxymethyl)(meth)acrylic acid etc. can be mentioned.

[0086] Among these, from the viewpoints of copolymerization reactivity etc., (meth)acrylic acid, succinic acid mono[2-(meth)acryloyloxyethyl], maleic anhydride etc. are preferable.

[0087] In this specification, (meth)acrylic acid means acrylic acid and / or methacrylic acid. The same applies to "(meth)acryloyl", "(meth)acrylate", etc.

[0088] (b) is, for example, a monomer having a cyclic ether structure with 2 to 4 carbon atoms (for example, at least one selected from the group consisting of an oxirane ring, an oxetane ring, and a tetrahydrofuran ring) and an ethylenically unsaturated bond. (b) is preferably a monomer having a cyclic ether structure with 2 to 4 carbon atoms and a (meth)acryloyloxy group.

[0089] Examples of (b) include a monomer (b1) having an oxiranyl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "(b1)"), a monomer (b2) having an oxetanyl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "(b2)"), a monomer (b3) having a tetrahydrofuryl group and an ethylenically unsaturated bond (hereinafter sometimes referred to as "(b3)"), etc.

[0090] (b1) includes, for example, a monomer (b1-1) having a structure in which a linear or branched aliphatic unsaturated hydrocarbon is epoxidized (hereinafter sometimes referred to as "(b1-1)"), and a monomer (b1-2) having a structure in which an alicyclic unsaturated hydrocarbon is epoxidized (hereinafter sometimes referred to as "(b1-2)").

[0091] (b1-1) includes, for example, glycidyl (meth)acrylate, β-methylglycidyl (meth)acrylate, β-ethylglycidyl (meth)acrylate, glycidyl vinyl ether, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, p-vinylbenzyl glycidyl ether, α-methyl-o-vinylbenzyl glycidyl ether, α-methyl-m-vinylbenzyl glycidyl ether, α-methyl-p-vinylbenzyl glycidyl ether, 2,3-bis(glycidyloxymethyl)styrene, 2,4-bis(glycidyloxymethyl)styrene, 2,5-bis(glycidyloxymethyl)styrene, 2,6-bis(glycidyloxymethyl)styrene, 2,3,4-tris(glycidyloxymethyl)styrene, 2,3,5-tris(glycidyloxymethyl)styrene, 2,3,6-tris(glycidyloxymethyl)styrene, 3,4,5-tris(glycidyloxymethyl)styrene, 2,4,6-tris(glycidyloxymethyl)styrene, etc.

[0092] (b1-2) includes vinylcyclohexene monooxide, 1,2-epoxy-4-vinylcyclohexane (for example, Celoxide 2000; manufactured by Daicel Corporation), 3,4-epoxycyclohexylmethyl (meth)acrylate (for example, Cyclomer A400; manufactured by Daicel Corporation), 3,4-epoxycyclohexylmethyl (meth)acrylate (for example, Cyclomer M100; manufactured by Daicel Corporation), a compound represented by formula (BI), and a compound represented by formula (BII), etc.

[0093] [Chemical formula]

[0094] [In formula (BI) and formula (BII), R e and R f each represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and the hydrogen atom contained in the alkyl group may be substituted with a hydroxy group. X e and X f each represents a single bond, *-R g -, *-R g -O-, *-R g -S- or *-R g -NH-. R g represents an alkanediyl group having 1 to 6 carbon atoms. * represents a bond to O.]

[0095] Examples of the alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, and a tert-butyl group. Examples of the alkyl group in which the hydrogen atom is substituted with hydroxy include a hydroxymethyl group, a 1-hydroxyethyl group, a 2-hydroxyethyl group, a 1-hydroxypropyl group, a 2-hydroxypropyl group, a 3-hydroxypropyl group, a 1-hydroxy-1-methylethyl group, a 2-hydroxy-1-methylethyl group, a 1-hydroxybutyl group, a 2-hydroxybutyl group, a 3-hydroxybutyl group, and a 4-hydroxybutyl group. R e and R f are preferably a hydrogen atom, a methyl group, a hydroxymethyl group, a 1-hydroxyethyl group, or a 2-hydroxyethyl group, and more preferably a hydrogen atom or a methyl group.

[0096] Examples of the alkanediyl group include a methylene group, an ethylene group, a propane-1,2-diyl group, a propane-1,3-diyl group, a butane-1,4-diyl group, a pentane-1,5-diyl group, and a hexane-1,6-diyl group. X e and X fExamples thereof preferably include a single bond, a methylene group, an ethylene group, *-CH2-O- and *-CH2CH2-O-, more preferably a single bond and *-CH2CH2-O- (* represents a bond to O).

[0097] Examples of the compound represented by formula (BI) include compounds represented by any of formula (BI-1) to formula (BI-15). Among them, compounds represented by formula (BI-1), formula (BI-3), formula (BII-5), formula (BI-7), formula (BI-9) or formula (BI-11) to formula (BI-15) are preferred, and compounds represented by formula (BI-1), formula (BI-7), formula (BI-9) or formula (BI-15) are more preferred.

[0098]

Chemical formula

[0099] Examples of the compound represented by formula (BII) include compounds represented by any of formula (BII-1) to formula (BII-15). Among them, compounds represented by formula (BII-1), formula (BII-3), formula (BII-5), formula (BII-7), formula (BII-9) or formula (BII-11) to formula (BII-15) are preferred, and compounds represented by formula (BII-1), formula (BII-7), formula (BII-9) or formula (BII-15) are more preferred.

[0100]

Chemical formula

[0101] The compound represented by formula (BI) and the compound represented by formula (BII) may be used alone or in combination of two or more. When the compound represented by formula (BI) and the compound represented by formula (BII) are used in combination, their content ratios [compound represented by formula (BI): compound represented by formula (BII)] are preferably 5:95 to 95:5, more preferably 20:80 to 80:20 on a molar basis.

[0102] As (b2), a monomer having an oxetanyl group and a (meth)acryloyloxy group is more preferable. Examples of (b2) include 3-methyl-3-methacryloyloxymethyloxetane, 3-methyl-3-acryloyloxymethyloxetane, 3-ethyl-3-methacryloyloxymethyloxetane, 3-ethyl-3-acryloyloxymethyloxetane, 3-methyl-3-methacryloyloxyethyloxetane, 3-methyl-3-acryloyloxyethyloxetane, 3-ethyl-3-methacryloyloxyethyloxetane, 3-ethyl-3-acryloyloxyethyloxetane, and the like.

[0103] As (b3), a monomer having a tetrahydrofuryl group and a (meth)acryloyloxy group is more preferable. Specifically, examples of (b3) include tetrahydrofurfuryl acrylate (for example, Biscoat V#150, manufactured by Osaka Organic Chemical Industry Co., Ltd.), tetrahydrofurfuryl methacrylate, and the like.

[0104] As (b), it is preferable to be (b1) in terms of being able to further improve the reliability such as chemical resistance.

[0105] Since the reactivity during the production of resins [K3] to [K6] is high and unreacted (b) is less likely to remain, as (b), a monomer having an oxirane ring and an ethylenically unsaturated bond is preferable.

[0106] Examples of (c) include methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, dodecyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-methylcyclohexyl (meth)acrylate, tricyclo[5.2.1.0 2,6Decan-8-yl (meth)acrylate (in the art, it is commonly known as "dicyclopentanyl (meth)acrylate". It may also be referred to as "tricyclodecyl (meth)acrylate".), tricyclo[5.2.1.0 2,6 Decen-8-yl (meth)acrylate (in the art, it is commonly known as "dicyclopentenyl (meth)acrylate".), dicyclopentanyloxyethyl (meth)acrylate, isobornyl (meth)acrylate, adamantyl (meth)acrylate, allyl (meth)acrylate, propargyl (meth)acrylate, phenyl (meth)acrylate, naphthyl (meth)acrylate, benzyl (meth)acrylate and other (meth)acrylic acid esters; Hydroxy group-containing (meth)acrylic acid esters such as 2-hydroxyethyl (meth)acrylate and 2-hydroxypropyl (meth)acrylate; Dicarboxylic acid diesters such as diethyl maleate, diethyl fumarate, and diethyl itaconate; Bicyclo[2.2.1]hept-2-ene, 5-methylbicyclo[2.2.1]hept-2-ene, 5-ethylbicyclo[2.2.1]hept-2-ene, 5-hydroxybicyclo[2.2.1]hept-2-ene, 5-hydroxymethylbicyclo[2.2.1]hept-2-ene, 5-(2'-hydroxyethyl)bicyclo[2.2.1]hept-2-ene, 5-methoxybicyclo[2.2.1]hept-2-ene, 5-ethoxybicyclo[2.2.1]hept-2-ene, 5,6-dihydroxybicyclo[2.2.1]hept-2-ene, 5,6-di(hydroxymethyl)bicyclo[2.2.1]hept-2-ene, 5,6-di(2'-hydroxyethyl)bicyclo[2.2.1]hept-2-ene, 5,6-dimethoxybicyclo[2.2.1]hept-2-ene, 5,6-diethoxybicyclo[2.2.1]hept-2-ene, 5-hydroxy-5-methylbicyclo[2.2.1]hept-2-ene, 5-hydroxy-5-ethylbicyclo[2.2.1]hept-2-ene, 5-hydroxymethyl-5-methylbicyclo[2.2.1]hept-2-ene, 5-tert-butoxycarbonylbicyclo[2.2.1]hept-2-ene, 5-cyclohexyloxycarbonylbicyclo[2.2.1]hept-2-ene, 5-phenoxycarbonylbicyclo[2.2.1]hept-2-ene, 5,6-bis(tert-butoxycarbonyl)bicyclo[2.2.1]hept-2-ene, 5,6-bis(cyclohexyloxycarbonyl)bicyclo[2.2.1]hept-2-ene and other bicyclic unsaturated compounds; Dicarbonylimide derivatives such as N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, N-succinimidyl 3-maleimidobenzoate, N-succinimidyl 4-maleimidobutyrate, N-succinimidyl 6-maleimidocaproate, N-succinimidyl 3-maleimidopropionate, N-(9-acridinyl)maleimide; Styrene, α-methylstyrene, m-methylstyrene, p-methylstyrene, vinyltoluene, p-methoxystyrene, acrylonitrile, methacrylonitrile, vinyl chloride, vinylidene chloride, acrylamide, methacrylamide, vinyl acetate, 1,3-butadiene isoprene, 2,3-dimethyl-1,3-butadiene etc. can be mentioned.

[0107] Among the above, from the viewpoint of copolymerization reactivity, methyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, dicyclopentanyl (meth)acrylate, styrene, vinyltoluene, N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, bicyclo[2.2.1]hept-2-ene, etc. are preferable.

[0108] In resin [K1], the ratio of the structural units derived from each is among all the structural units constituting resin [K1], (a) the structural unit derived from; 2 mol% or more and 60 mol% or less (c) the structural unit derived from; 40 mol% or more and 98 mol% or less is preferably, (a) the structural unit derived from; 10 mol% or more and 50 mol% or less (c) the structural unit derived from; 50 mol% or more and 90 mol% or less is more preferably.

[0109] When the ratio of the structural units of resin [K1] is within the above range, there is a tendency to be excellent in storage stability and solvent resistance.

[0110] Resin [K1] can be produced, for example, with reference to the method described in the literature "Experimental Methods of Polymer Synthesis" (written by Takayuki Otsu, published by Kagaku Dojin Co., Ltd., 1st edition, 1st printing, issued on March 1, 1972) and the cited references described in the said literature.

[0111] Specifically, a method may be employed in which predetermined amounts of (a) and (c), a polymerization initiator, a solvent, etc. are placed in a reaction vessel, and the atmosphere is made oxygen-free, for example, by replacing oxygen with nitrogen, followed by heating and holding while stirring.

[0112] The polymerization initiator, solvent, etc. to be used are not particularly limited, and those commonly used in the art can be used. For example, as the polymerization initiator, azo compounds (such as 2,2'-azobisisobutyronitrile, 2,2'-azobis(2,4-dimethylvaleronitrile), etc.) and organic peroxides (such as benzoyl peroxide, t-butylperoxy-2-ethylhexanoate, etc.) can be mentioned. As the solvent, any solvent that can dissolve each monomer may be used, and examples include the solvents described later as solvent (J).

[0113] The obtained copolymer may be used as the reaction solution as it is, or a concentrated or diluted solution may be used, or a solid (powder) taken out by a method such as reprecipitation may be used. If the solvent (J) described later is used as the solvent during polymerization, the reaction solution can be used as it is for the preparation of the composition, thus simplifying the manufacturing process of the composition.

[0114] In resin [K2], the ratio of the structural units derived from each is among all the structural units constituting resin [K2], Structural unit derived from (a); 2 to 45 mol% Structural unit derived from (b); 2 to 95 mol% Structural unit derived from (c); 1 to 65 mol% It is preferably such that, Structural unit derived from (a); 5 to 40 mol% Structural unit derived from (b); 5 to 80 mol% Structural unit derived from (c); 5 to 60 mol% It is more preferably such that.

[0115] When the ratio of the structural units of resin [K2] is within the above range, the storage stability of the composition and the developability when forming a coloring pattern tend to be excellent.

[0116] Resin [K2] can be produced, for example, in the same manner as the method described as the production method of resin [K1].

[0117] Resin [K3] can be produced by adding the cyclic ether having 2 to 4 carbon atoms in (b) to the carboxylic acid and / or carboxylic anhydride having in (a) in the copolymer of (a) and (c).

[0118] First, a copolymer of (a) and (c) is produced in the same manner as the method described as the production method of resin [K1]. In this case, the ratio of the structural units derived from each is preferably the same as the ratio described for resin [K1].

[0119] Next, a cyclic ether having 2 to 4 carbon atoms in (b) is reacted with a part of the carboxylic acid and / or carboxylic anhydride derived from (a) in the above copolymer.

[0120] Following the production of the copolymer of (a) and (c), the atmosphere in the flask is replaced from nitrogen to air, and in the presence of (b), a carboxylic acid or carboxylic anhydride, a reaction catalyst for the cyclic ether (for example, an organic phosphorus compound, a metal complex, an amine compound, etc.) and a polymerization inhibitor (for example, hydroquinone, methoxyquinone, etc.), etc., for example, at 60°C or higher and 130°C or lower, and reacting for 1 hour or more and 10 hours or less, resin [K3] can be produced.

[0121] The usage amount of (b) is preferably 5 mol or more and 80 mol or less, more preferably 10 mol or more and 75 mol or less, per 100 mol of (a). By setting it within this range, in the mode of producing a cured film by pre-baking, exposing (and further developing if necessary) the coating film of the curable composition and then thermally curing, the pre-baking and thermal curing temperatures can be lowered, and the Martens hardness can be appropriately adjusted, resulting in a reduction in the arithmetic mean roughness of the cured film.

[0122] Examples of the organic phosphorus compound as the reaction catalyst include triphenylphosphine. Examples of the amine compound as the reaction catalyst include aliphatic tertiary amine compounds or aliphatic quaternary ammonium salt compounds, and specific examples thereof include tris(dimethylaminomethyl)phenol, triethylamine, tetrabutylammonium bromide, tetrabutylammonium chloride, and the like. The reaction catalyst is preferably an organic phosphorus compound.

[0123] The amount of the reaction catalyst used is preferably 0.001 part by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the total amount of (a), (b), and (c).

[0124] The amount of the polymerization inhibitor used is preferably 0.001 part by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the total amount of (a), (b), and (c).

[0125] Reaction conditions such as the charging method, reaction temperature, and time can be appropriately adjusted in consideration of the production equipment, the amount of heat generated by polymerization, and the like. Note that, similar to the polymerization conditions, the charging method and reaction temperature can be appropriately adjusted in consideration of the production equipment, the amount of heat generated by polymerization, and the like.

[0126] As the first step, the resin [K5] is obtained in the same manner as the production method of the resin [K1] described above to obtain a copolymer of (b) and (c). Similar to the above, the obtained copolymer may be used as the solution after the reaction as it is, or a concentrated or diluted solution may be used, or a solid (powder) taken out by a method such as reprecipitation may be used.

[0127] The ratios of the structural units derived from (b) and (c) are, respectively, based on the total number of moles of all the structural units constituting the copolymer Structural unit derived from (b); 5 mol% or more and 95 mol% or less Structural unit derived from (c); 5 mol% or more and 95 mol% or less It is preferably that Structural unit derived from (b); 10 mol% or more and 90 mol% or less A structural unit derived from (c); 10 mol% or more and 90 mol% or less is more preferably.

[0128] Resin [K4] is a resin obtained by further reacting resin [K3] with a carboxylic anhydride. The carboxylic anhydride is reacted with the hydroxy group generated by the reaction of the carboxylic acid or carboxylic anhydride with the cyclic ether. Examples of the carboxylic anhydride include succinic anhydride, maleic anhydride, citraconic anhydride, itaconic anhydride, 3-vinylphthalic anhydride, 4-vinylphthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, 5,6-dicarboxybicyclo[2.2.1]hept-2-ene anhydride, and the like. The amount of the carboxylic anhydride used is preferably 0.5 mol or more and 1 mol or less with respect to 1 mol of the amount of (b) used.

[0129] Resin [K5] can be obtained by reacting the cyclic ether derived from (b) in the copolymer of (b) and (c) under the same conditions as the production method of resin [K3] with the carboxylic acid or carboxylic anhydride that (a) has.

[0130] The amount of (a) used for reacting with the above copolymer is preferably 5 mol or more and 120 mol or less, and more preferably 20 mol or more and 110 mol or less with respect to 100 mol of (b).

[0131] Resin [K6] is a resin obtained by further reacting resin [K5] with a carboxylic anhydride. The carboxylic anhydride is reacted with the hydroxy group generated by the reaction of the cyclic ether with the carboxylic acid or carboxylic anhydride.

[0132] Examples of the carboxylic acid anhydride include succinic anhydride, maleic anhydride, citraconic anhydride, itaconic anhydride, 3-vinylphthalic anhydride, 4-vinylphthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6-tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, 5,6-dicarboxybicyclo[2.2.1]hept-2-ene anhydride, and the like.

[0133] The amount of the carboxylic acid anhydride used is preferably 0.1 to 1 mol, more preferably 0.2 to 1 mol, and still more preferably 0.3 to 1 mol, per 1 mol of the amount of (a) used.

[0134] Examples of the resins [K1], [K2], [K3], [K4], [K5], and [K6] include resin [K1] such as benzyl (meth)acrylate / (meth)acrylic acid copolymer, styrene / (meth)acrylic acid copolymer, (meth)acrylic acid / succinic acid mono[2-(meth)acryloyloxyethyl] / dicyclopentanyl (meth)acrylate / methyl (meth)acrylate copolymer; resin [K2] such as glycidyl (meth)acrylate / benzyl (meth)acrylate / (meth)acrylic acid copolymer, glycidyl (meth)acrylate / styrene / (meth)acrylic acid copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 decyl acrylate / (meth)acrylic acid / methyl (meth)acrylate copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 decyl acrylate / (meth)acrylic acid / N-cyclohexylmaleimide copolymer, 3,4-epoxytricyclo[5.2.1.0 2,6 decyl acrylate / (meth)acrylic acid / benzyl (meth)acrylate copolymer; Resins such as a resin obtained by adding glycidyl (meth)acrylate to a benzyl (meth)acrylate / (meth)acrylic acid copolymer, a resin obtained by adding glycidyl (meth)acrylate to a tricyclodecyl (meth)acrylate / styrene / (meth)acrylic acid copolymer, a resin obtained by adding glycidyl (meth)acrylate to a tricyclodecyl (meth)acrylate / benzyl (meth)acrylate / (meth)acrylic acid copolymer [K3]; Resins such as a resin obtained by further ester-bonding tetrahydrophthalic anhydride or succinic anhydride to a resin obtained by adding glycidyl (meth)acrylate to a dicyclopentanyl (meth)acrylate / methyl (meth)acrylate / (meth)acrylic acid copolymer, a resin obtained by further ester-bonding tetrahydrophthalic anhydride or succinic anhydride to a resin obtained by adding glycidyl (meth)acrylate to a dicyclopentanyl (meth)acrylate / 2-ethylhexyl (meth)acrylate / (meth)acrylic acid copolymer [K4]; Resins such as a resin obtained by adding (meth)acrylic acid to a copolymer of tricyclodecyl (meth)acrylate / glycidyl (meth)acrylate, a resin obtained by adding (meth)acrylic acid to a copolymer of tricyclodecyl (meth)acrylate / styrene / glycidyl (meth)acrylate [K5]; Resins such as a resin obtained by further ester-bonding tetrahydrophthalic anhydride or succinic anhydride to a resin obtained by adding (meth)acrylic acid to a copolymer of tricyclodecyl (meth)acrylate / glycidyl (meth)acrylate, a resin obtained by further ester-bonding tetrahydrophthalic anhydride or succinic anhydride to a resin obtained by adding (meth)acrylic acid to a copolymer of dicyclopentanyl (meth)acrylate / 2-ethylhexyl (meth)acrylate / glycidyl (meth)acrylate [K6], etc. can be mentioned.

[0135] The resin (C) contained in the curable composition preferably contains at least one selected from the group consisting of resin [K1], resin [K2], resin [K3], resin [K4], resin [K5] and resin [K6], more preferably contains at least one selected from the group consisting of resin [K3], resin [K4], resin [K5] and resin [K6], still more preferably contains at least one selected from the group consisting of resin [K4] and resin [K6], and resin [K6] is particularly preferred.

[0136] As a further example of the resin (C), the resin described in JP-A-2018-123274 can be mentioned. Examples of the resin include a polymer having a double bond in the side chain and containing a structural unit (α) represented by the following formula (I) and a structural unit (β) represented by the following formula (II) in the main chain, and further containing an acid group (hereinafter, also referred to as "resin (Ca)").

[0137] The acid group can be introduced into the resin, for example, when the resin (Ca) contains a structural unit (γ) derived from an acid group-containing monomer (for example, (meth)acrylic acid, etc.). The resin (Ca) preferably contains the structural units (α), (β) and (γ) in the main chain skeleton.

[0138] [Chemical formula]

[0139] [In the formula, R A and R B represent the same or different hydrogen atoms or hydrocarbon groups having 1 to 25 carbon atoms. n represents the average number of repeating units of the structural unit represented by the formula (I) and is a number of 1 or more. ]

[0140] [Chemical formula]

[0141] [In the formula, R C represents the same or different hydrogen atoms or methyl groups. R Dis the same or different and represents a linear or branched hydrocarbon group having 4 to 20 carbon atoms. m represents the average number of repeating units of the structural unit represented by formula (II) and is a number of 1 or more.] In resin (Ca), from the viewpoint of the storage stability of resin (Ca), the content ratio of structural unit (α) is, for example, 0.5% by mass or more and 50% by mass or less, preferably 1% by mass or more and 40% by mass or less, more preferably 5% by mass or more and 30% by mass or less, based on 100% by mass of the total amount of all monomer units that give the main chain skeleton of resin (Ca). n in formula (I) represents the average number of repeating units of structural unit (α) in resin (Ca), and n can be set so that the content ratio of structural unit (α) is within the above range.

[0142] From the viewpoint of solvent resistance, the content ratio of structural unit (β) is, for example, 10% by mass or more and 90% by mass or less, preferably 20% by mass or more and 80% by mass or less, more preferably 30% by mass or more and 75% by mass or less, based on 100% by mass of the total amount of all monomer units that give the main chain skeleton of resin (Ca). m in formula (II) represents the average number of repeating units of structural unit (β) in resin (Ca), and m can be set so that the content ratio of structural unit (β) is within the above-mentioned range.

[0143] From the viewpoint of the solubility of resin (Ca) in solvent (J) and the like, the content ratio of structural unit (γ) is, for example, 0.5% by mass or more and 50% by mass or less, preferably 2% by mass or more and 50% by mass or less, more preferably 5% by mass or more and 45% by mass or less, based on 100% by mass of the total amount of all monomer units that give the main chain skeleton of resin (Ca).

[0144] The resin (C) has a weight average molecular weight Mw in terms of standard polystyrene measured by GPC of, for example, 1,000 or more and 100,000 or less, preferably 2,000 or more and 50,000 or less, more preferably 3,000 or more and 20,000 or less, still more preferably 5,000 or more and 8,000 or less, from the viewpoints of developability and light emission intensity of the curable composition. The Mw of the resin (C) can be adjusted by appropriately combining the selection of raw materials used, charging method, reaction temperature, reaction time, and other reaction conditions. The Mw of the resin (C) can be measured according to the measurement method described in the Examples section below. Alternatively, for the resin (C) contained in the curable composition, Mw may be measured using GPC.

[0145] The acid value of the resin (C) is preferably 150 mg-KOH / g or less, more preferably 110 mg-KOH / g or less, still more preferably 80 mg-KOH / g or less, and also preferably 20 mg-KOH / g or more, more preferably 30 mg-KOH / g or more, from the viewpoints of developability and solvent resistance of the curable composition. In the method for producing a cured film described below, a mode of thermosetting after the step of exposing or developing the coating film of the curable composition will be described. The higher the acid value of the resin (C), the more remarkable the effect of reducing the arithmetic mean roughness of the cured film by reducing this thermosetting temperature tends to be. The acid value of the resin (C) can be adjusted by the content of the monomer component having an acid group (for example, the above (a)) and the content of the carboxylic acid anhydride.

[0146] The acid value of the resin (C) is a value measured as the amount (mg) of potassium hydroxide required to neutralize 1 g of the resin (C), and can be determined, for example, by titration using an aqueous potassium hydroxide solution. Specifically, it can be measured according to the measurement method described in the Examples section below. Alternatively, for the resin (C) contained in the composition, the acid value may be determined, for example, by performing its structural analysis.

[0147] The resin (C) preferably contains a resin having a double bond equivalent of 500 g / eq or less, more preferably contains a resin having a double bond equivalent of 450 g / eq or less. In a preferred embodiment, the lower limit of the double bond equivalent of these resins contained may be 200 g / eq in each case. When the double bond equivalent is within the above range, in the mode of producing a cured film by thermally curing after the steps of pre-baking and exposing the coating film of the curable composition (and further developing if necessary), the pre-baking and thermosetting temperatures can be lowered, the arithmetic mean roughness of the cured film can be reduced, and also the film sagging during development can be suppressed even when the pre-baking temperature is low. Examples of the resin having the above-described double bond equivalent include (meth)acrylic resins. The resin (C) preferably consists of a (meth)acrylic resin.

[0148] The content of the resin (C) in the curable composition is, for example, 5% by mass or more and 80% by mass or less, preferably 10% by mass or more and 70% by mass or less, more preferably 13% by mass or more and 60% by mass or less, and still more preferably 17% by mass or more and 55% by mass or less, based on the total amount of the solid content of the curable composition. When the content of the resin (C) is within the above range, the pre-baking and thermosetting temperatures of the coating film of the curable composition can be lowered, and the arithmetic mean roughness of the cured film can be reduced.

[0149] The mass ratio (A / C) of the semiconductor particles (A) to the resin (C) is preferably 0.6 or more and less than 10, more preferably 1 or more and 8 or less, and still more preferably 1.5 or more and 5 or less.

[0150] <Light scattering agent (B)> Examples of the light scattering agent (B) include inorganic particles such as metal or metal oxide particles and glass particles. Examples of the metal oxide include TiO2, SiO2, BaTiO3, ZnO, etc. Since it efficiently scatters light, it is preferably TiO2 particles. The particle diameter of the light scattering agent (B) is, for example, about 0.03 μm or more and 20 μm or less, preferably 0.05 μm or more and 1 μm or less, and more preferably 0.05 μm or more and 0.5 μm or less.

[0151] As the light scattering agent (B), a light scattering agent dispersed in part or all of the solvent (J) in advance using a dispersant (I) may be used. As the dispersant (I), commercially available products can be used. Examples of commercially available products include DISPERBYK-101, 102, 103, 106, 107, 108, 109, 110, 111, 116, 118, 130, 140, 154, 161, 162, 163, 164, 165, 166, 170, 171, 174, 180, 181, 182, 183, 184, 185, 190, 192, 2000, 2001, 2020, 2025, 2050, 2070, 2095, 2150, 2155; ANTI-TERRA-U, U100, 203, 204, 250; BYK-P104, P104S, P105, 220S, 6919; BYK-LPN6919, 21116; LACTIMON, LACTIMON-WS; Bykumen, etc., manufactured by BYK Chemie Japan Co., Ltd. SOLSPERSE-3000, 9000, 13000, 13240, 13650, 13940, 16000, 17000, 18000, 20000, 21000, 24000, 26000, 27000, 28000, 31845, 32000, 32500, 32550, 33500, 32600, 34750, 35100, 36600, 38500, 41000, 41090, 53095, 55000, 76500, etc., manufactured by Lubrizol Japan Ltd. EFKA-46, 47, 48, 452, 4008, 4009, 4010, 4015, 4020, 4047, 4050, 4055, 4060, 4080, 4400, 4401, 4402, 4403, 4406, 4408, 4300, 4310, 4320, 4330, 4340, 450, 451, 453, 4540, 4550, 4560, 4800, 5010, 5065, 5066, 5070, 7500, 7554, 1101, 120, 150, 1501, 1502, 1503, etc., manufactured by BASF Examples include AJISPER PA111, PB711, PB821, PB822, PB824, etc., manufactured by Ajinomoto Fine-Techno Co., Inc.

[0152] The content ratio of the light-scattering agent (B) in the curable composition is, for example, 0.001 mass% or more and 50 mass% or less with respect to the total amount of the solid content of the curable composition. From the viewpoint of improving the light-scattering ability and luminescence intensity when the cured film is used as a wavelength conversion layer, it is preferably 1 mass% or more and 40 mass% or less, more preferably 2 mass% or more and 30 mass% or less, still more preferably 5 mass% or more and 30 mass% or less, and even more preferably 8 mass% or more and 30 mass% or less.

[0153] <Polymerizable compound (D)> The polymerizable compound (D) is a compound that can be polymerized by active radicals, acids, etc. generated from a polymerization initiator (E) described later. Examples of the polymerizable compound (D) include photopolymerizable compounds such as compounds having an ethylenically unsaturated bond, for example, (meth)acrylic acid ester compounds. Another example of the polymerizable compound (D) is a thermopolymerizable compound. The curable composition may contain two or more kinds of the polymerizable compound (D).

[0154] Examples of the polymerizable compound (D) include a photopolymerizable compound (Dα) having two ethylenically unsaturated bonds in the molecule and a photopolymerizable compound (Dβ) having three or more ethylenically unsaturated bonds in the molecule. In the photopolymerizable compound (Dβ), the number of ethylenically unsaturated bonds in the molecule is preferably 6 or less. The ethylenically unsaturated bond is preferably a (meth)acryloyloxy group. The weight average molecular weight of the polymerizable compound (D) is preferably 150 or more and 2900 or less, more preferably 250 or more and 1500 or less. The polymerizable compound (D) preferably contains one or more selected from the photopolymerizable compound (Dα) and the photopolymerizable compound (Dβ), and more preferably contains one or more of the photopolymerizable compound (Dβ). The photopolymerizable compound (D) may contain one or more of the photopolymerizable compound (Dα) and one or more of the photopolymerizable compound (Dβ).

[0155] Examples of the photopolymerizable compound (Dα) having two ethylenically unsaturated bonds in the molecule include bifunctional (meth)acrylic compounds such as alkylene glycol di(meth)acrylate, polyoxyalkylene glycol di(meth)acrylate, halogen-substituted alkylene glycol di(meth)acrylate, di(meth)acrylate of aliphatic polyol, di(meth)acrylate of hydrogenated dicyclopentadiene or tricyclodecane dialkanol, di(meth)acrylate of dioxane glycol or dioxane dialkanol, di(meth)acrylate of alkylene oxide adduct of bisphenol A or bisphenol F, epoxy di(meth)acrylate of bisphenol A or bisphenol F, and the like.

[0156] More specific examples of the bifunctional (meth)acrylic compound include ethylene glycol di(meth)acrylate, 1,3-butanediol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane di(meth)acrylate, pentaerythritol di(meth)acrylate, ditrimethylolpropane di(meth)acrylate, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, polypropylene glycol di(meth)acrylate, polytetramethylene glycol di(meth)acrylate, di(meth)acrylate of hydroxypivalic acid neopentyl glycol ester, 2,2-bis[4-(meth)acryloyloxyethoxyethoxyphenyl]propane, 2,2-bis[4-(meth)acryloyloxyethoxyethoxycyclohexyl]propane, hydrogenated dicyclopentadienyl di(meth)acrylate, tricyclodecane dimethanol di(meth)acrylate, 1,3-dioxane-2,5-diyl di(meth)acrylate [alias: dioxane glycol di(meth)acrylate], di(meth)acrylate of an acetal compound of hydroxypivalaldehyde and trimethylolpropane [chemical name: 2-(2-hydroxy-1,1-dimethylethyl)-5-ethyl-5-hydroxymethyl-1,3-dioxane], tris(hydroxyethyl)isocyanurate di(meth)acrylate, di(meth)acrylate of ethoxylated bisphenol A, di(meth)acrylate of propoxylated bisphenol A, di(meth)acrylate of ethoxylated bisphenol F, di(meth)acrylate of propoxylated bisphenol F, and the like.

[0157] The photopolymerizable compound (Dα) having two ethylenically unsaturated bonds in the molecule is preferably a photopolymerizable compound (Dα1) having one or more cyclic hydrocarbon groups and two ethylenically unsaturated bonds in one molecule, and it is preferable that the polymerizable compound (D) contains one or more of the photopolymerizable compounds (Dα1). In the photopolymerizable compound (Dα1), the cyclic hydrocarbon group is preferably an aromatic hydrocarbon group, and the aromatic hydrocarbon group is more preferably a phenylene group. Also, in the photopolymerizable compound (Dα1), the number of cyclic hydrocarbon groups in one molecule is preferably two. Specific examples of the photopolymerizable compound (Dα1) include di(meth)acrylate of ethoxylated bisphenol A, di(meth)acrylate of propoxylated bisphenol A, di(meth)acrylate of ethoxylated bisphenol F, di(meth)acrylate of propoxylated bisphenol F, and the like.

[0158] Examples of the polymerizable compound (Dβ) having three or more ethylenically unsaturated bonds in the molecule include a compound (Dβ1) having three or more (meth)acryloyloxy groups in the molecule and having an acidic functional group, and a compound (Dβ2) having three or more (meth)acryloyloxy groups in the molecule and not having an acidic functional group. The polymerizable compound (D) preferably contains at least one of the compounds (Dβ1) and (Dβ2), and more preferably contains at least one of the compounds (Dβ1). Examples of the above acidic functional group include a carboxy group, a sulfonic acid group, a phosphoric acid group, and the like. Among them, the acidic functional group is preferably a carboxy group.

[0159] The number of (meth)acryloyloxy groups in one molecule of the compound (Dβ1) is, for example, 3 or more and 6 or less, preferably 3 or more and 5 or less, and more preferably 3. The number of acidic functional groups in one molecule of the compound (Dβ1) is 1 or more, and preferably 1. When having two or more acidic functional groups, the respective acidic functional groups may be different or the same, but it is preferable to have at least one carboxy group.

[0160] Examples of the compound (Dβ1) include compounds obtained by esterifying a compound having three or more (meth)acryloyloxy groups and hydroxy groups, such as pentaerythritol tri(meth)acrylate or dipentaerythritol penta(meth)acrylate, with a dicarboxylic acid or dicarboxylic anhydride. Examples of such compounds include a compound obtained by mono-esterifying pentaerythritol tri(meth)acrylate and succinic acid, a compound obtained by mono-esterifying dipentaerythritol penta(meth)acrylate and succinic acid, a compound obtained by mono-esterifying pentaerythritol tri(meth)acrylate and maleic acid, and a compound obtained by mono-esterifying dipentaerythritol penta(meth)acrylate and maleic acid. Among them, a compound obtained by mono-esterifying pentaerythritol tri(meth)acrylate and succinic acid is preferred.

[0161] Examples of commercially available products of the compound (Dβ1) include "Aronix M-510" manufactured by Toagosei Co., Ltd., which contains a dibasic acid anhydride adduct of pentaerythritol tri(meth)acrylate as the main component, and "Aronix M-520D" manufactured by Toagosei Co., Ltd., which contains a dibasic acid anhydride adduct of dipentaerythritol penta(meth)acrylate as the main component. These commercially available products have a carboxy group as an acidic functional group.

[0162] The number of (meth)acryloyloxy groups in the compound (Dβ2) is preferably 3 to 6, more preferably 4 to 6.

[0163] Examples of the compound (Dβ2) include trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, tripentaerythritol octa(meth)acrylate, tripentaerythritol hepta(meth)acrylate, tetrapentaerythritol deca(meth)acrylate, tetrapentaerythritol nona(meth)acrylate, tris(2-(meth)acryloyloxyethyl) isocyanurate, ethylene glycol-modified pentaerythritol tetra(meth)acrylate, ethylene glycol-modified dipentaerythritol hexa(meth)acrylate, propylene glycol-modified pentaerythritol tetra(meth)acrylate, propylene glycol-modified dipentaerythritol hexa(meth)acrylate, caprolactone-modified pentaerythritol tetra(meth)acrylate, caprolactone-modified dipentaerythritol hexa(meth)acrylate, and the like. Among them, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, etc. are preferable.

[0164] The polymerizable compound (D) in the curable composition preferably contains the compound (Dα) (particularly the compound (Dα1)) because it can lower the pre-bake and thermosetting temperatures of the coating film of the curable composition, can reduce the arithmetic mean roughness of the cured film, and can reduce the residue after development of the curable composition. Further, when the polymerizable compound (D) contains the compound (Dβ), it can lower the pre-bake and thermosetting temperatures of the coating film of the curable composition, can reduce the arithmetic mean roughness of the cured film, can improve the curability during exposure and the patterning property during development, can further improve the dispersibility of the semiconductor particles (A), and can improve the emission intensity when the cured film is used as a wavelength conversion layer, which is preferable.

[0165] In 100% by mass of the polymerizable compound (D) contained in the curable composition, the compound (Dα) (particularly the compound (Dα1)) is preferably 30% by mass or more, more preferably 40% by mass or more, still more preferably 50% by mass or more, and may be 70% by mass or less. In 100% by mass of the polymerizable compound (D) contained in the curable composition, the compound (Dβ) is preferably 20% by mass or more, more preferably 30% by mass or more, still more preferably 40% by mass or more, may be 100% by mass, or may be 60% by mass or less.

[0166] When the polymerizable compound (D) in the curable composition contains both the compound (Dα) and the compound (Dβ), it preferably contains the compounds (Dα1) and (Dβ1). The total content of the compounds (Dα1) and (Dβ1) with respect to 100% by mass of the polymerizable compound (D) is preferably 70% by mass or more, more preferably 85% by mass or more, and may be 100% by mass. The content of the compound (Dα1) with respect to 100% by mass of the total amount of the compounds (Dα1) and (Dβ1) is preferably more than 50% by mass, more preferably 53% by mass or more, still more preferably 55% by mass or more, and may be 70% by mass or less.

[0167] When the polymerizable compound (D) in the curable composition contains both the compound (Dβ1) and the compound (Dβ2), the total content of the compounds (Dβ1) and (Dβ2) with respect to 100% by mass of the polymerizable compound (D) is preferably 70% by mass or more, more preferably 85% by mass or more, and may be 100% by mass. The content of the compound (Dβ2) with respect to 100% by mass of the total amount of the compounds (Dβ1) and (Dβ2) is preferably more than 50% by mass, more preferably 53% by mass or more, still more preferably 55% by mass or more, and may be 70% by mass or less.

[0168] The content rate (total amount in case of multiple types) of the polymerizable compound (D) in the curable composition is preferably 3 mass% or more and 30 mass% or less, more preferably 4 mass% or more and 20 mass% or less, still more preferably 5 mass% or more and 15 mass% or less with respect to 100 mass% of the total amount of the solid content of the curable composition. When the content rate of the polymerizable compound (D) is within the above range, the pre-baking and thermosetting temperatures of the coating film of the curable composition can be lowered, and the arithmetic mean roughness of the cured film can be decreased.

[0169] <Polymerization initiator (E)> The polymerization initiator (E) is a compound that can generate active radicals, acids, etc. by the action of light or heat and initiate the polymerization of the polymerizable compound (D). The curable composition can contain one or more polymerization initiators (E).

[0170] Examples of the polymerization initiator (E) include compounds represented by formula (EA). By including a compound represented by formula (EA) as the polymerization initiator (E), the pre-baking and thermosetting temperatures of the coating film of the curable composition can be lowered, and the arithmetic mean roughness of the cured film can be decreased. Also, by including the compound represented by formula (EA), the effect of improving the emission intensity (fluorescence emission intensity) evaluated in the examples described later can be exhibited.

[0171]

Chemical formula

[0172] R ea1Examples of the branched hydrocarbon group having 3 to 20 carbon atoms represented by include a branched saturated hydrocarbon group having 3 to 20 carbon atoms, a branched unsaturated hydrocarbon group having 3 to 20 carbon atoms, and the like.

[0173] R ea1Examples of the branched saturated hydrocarbon group having 3 to 20 carbon atoms represented by include 1-methylethyl group (isopropyl group), 1-methylpropyl group (sec-butyl group), 2-methylpropyl group (isobutyl group), 1,1-dimethylethyl group (tert-butyl group), 1,1-dimethylpropyl group, 2,2-dimethylpropyl group, 1,2-dimethylpropyl group, 1-ethylpropyl group, 1-methylbutyl group, 2-methylbutyl group, 3-methylbutyl group, 1,1-dimethylbutyl group, 2,2-dimethylbutyl group, 3,3-dimethylbutyl group, 1,2-dimethylbutyl group, 1,3-dimethylbutyl group, 2,3-dimethylbutyl group, 1-ethylbutyl group, 2-ethylbutyl group, 1-methylpentyl group, 2-methylpentyl group, 3-methylpentyl group, 4-methylpentyl group, 1,1-dimethylpentyl group, 2,2-dimethylpentyl group, 3,3-dimethylpentyl group, 1,2-dimethylpentyl group, 1,3-dimethylpentyl group, 2,3-dimethylpentyl group, 1-ethylpentyl group, 2-ethylpentyl group, 3-ethylpentyl group, 1-methylhexyl group, 2-methylhexyl group, 3-methylhexyl group, 4-methylhexyl group, 1,1-dimethylhexyl group, 2,2-dimethylhexyl group, 3,3-dimethylhexyl group, 1,2-dimethylhexyl group, 1,3-dimethylhexyl group, 2,3-dimethylhexyl group, 1-ethylhexyl group, 2-ethylhexyl group, 3-ethylhexyl group, 1-methylheptyl group, 2-methylheptyl group, 3-methylheptyl group, 4-methylheptyl group, 1,1-dimethylheptyl group, 2,2-dimethylheptyl group, 3,3-dimethylheptyl group, 1,2-dimethylheptyl group, 1,3-dimethylheptyl group, 2,3-dimethylheptyl group, 1-ethylheptyl group, 2-ethylheptyl group, 3-ethylheptyl group, 1-methyloctyl group, 2-methyloctyl group, 3-methyloctyl group, 4-methyloctyl group, 1,1-dimethyloctyl group, 2,2-dimethyloctyl group, 3,3-dimethyloctyl group, 1,2-dimethyloctyl group, 1,3-dimethyloctyl group, 2,Branched alkyl groups such as 3-dimethyloctyl group, 1-ethyloctyl group, 2-ethyloctyl group, 3-ethyloctyl group, 1-methylnonyl group, 2-methylnonyl group, 3-methylnonyl group, 4-methylnonyl group, dimethylnonyl group, ethylnonyl group, methyldecyl group, dimethyldecyl group, ethyldecyl group, methylundecyl group, dimethylundecyl group, ethylundecyl group, methyldodecyl group, etc.; may be mentioned., R ea1 The branched alkyl group represented by may be any of a primary branched alkyl group, a secondary branched alkyl group, or a tertiary branched alkyl group., R ea1 The number of carbon atoms of the branched saturated hydrocarbon group represented by is preferably 4 or more, more preferably 5 or more, preferably 16 or less, more preferably 12 or less, and still more preferably 10 or less.,

[0174] R ea1 Examples of the branched unsaturated hydrocarbon group represented by include groups in which at least one carbon-carbon single bond contained in the branched saturated hydrocarbon group represented by the aforementioned R ea1 is replaced by a carbon-carbon double bond or a carbon-carbon triple bond., R ea1 Examples of the branched unsaturated hydrocarbon group represented by include alkenyl groups such as isopropenyl group, isobutenyl group, isopentenyl group, isohexenyl group, isoheptenyl group, isooctenyl group, isononyl group, isodecenyl group; alkynyl groups such as isopropynyl group, isobutinyl group, isopentynyl group, isohexynyl group, isoheptynyl group, isooctynyl group, isononynyl group, isodecynyl group; etc., R ea1 The number of carbon atoms of the branched unsaturated hydrocarbon group represented by is preferably 4 or more, more preferably 5 or more, preferably 16 or less, more preferably 12 or less, and still more preferably 10 or less.,

[0175] R ea2 R ea3 R ea4 and R ea5Examples of the hydrocarbon group having 1 to 20 carbon atoms represented by include saturated hydrocarbon groups having 1 to 20 carbon atoms, unsaturated hydrocarbon groups having 2 to 20 carbon atoms, aromatic hydrocarbon groups having 6 to 20 carbon atoms, and the like. R ea2 , R ea3 , R ea4 and R ea5 The hydrocarbon groups represented by may be the same or different from each other.

[0176] Examples of the saturated hydrocarbon group having 1 to 20 carbon atoms include linear alkyl groups such as methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, dodecyl group, hexadecyl group, icosyl group; branched-chain alkyl groups such as isopropyl group, isobutyl group, isopentyl group, neopentyl group, 2-ethylhexyl group; and alicyclic saturated hydrocarbon groups having 3 to 20 carbon atoms such as cyclopropyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, tricyclodecyl group. The number of carbon atoms of the saturated hydrocarbon group is preferably 1 to 18, more preferably 1 to 15, still more preferably 1 to 10, and even more preferably 1 to 8.

[0177] Examples of the unsaturated hydrocarbon group having 2 to 20 carbon atoms include alkenyl groups such as vinyl group, allyl group, butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, hexadecenyl group, octadecenyl group, icosenyl group; alkynyl groups such as ethynyl group, propynyl group, hexynyl group, decynyl group, icosynyl group; cycloalkenyl groups such as cyclopentenyl group, cyclohexenyl group, cycloheptenyl group; and the like. The number of carbon atoms of the unsaturated hydrocarbon group is preferably 2 to 18, more preferably 2 to 15, and still more preferably 2 to 10.

[0178] Examples of the aromatic hydrocarbon group having 6 to 20 carbon atoms include a phenyl group, a xylyl group, a trimethylphenyl group, a dipropylphenyl group, a di(2,2-dimethylpropyl)phenyl group, a naphthyl group, a benzyl group, a phenylethyl group, a phenylbutyl group, etc. The number of carbon atoms in the aromatic hydrocarbon group is preferably 6 to 18, more preferably 6 to 15, and further preferably 6 to 12.

[0179] R ea1 , R ea2 , R ea3 , R ea4 and R ea5 Examples of the substituent that the hydrocarbon group represented by the formula (I) may have include a halogen atom, a cyano group, and a nitro group. The halogen atom is preferably a fluorine atom, a bromine atom, a chlorine atom, or an iodine atom.

[0180] The -CH2- contained in the hydrocarbon group may be replaced by -O-, -S-, -CO- or -OCO-, provided that adjacent -CH2- are not simultaneously replaced by the same type of group, and the terminal -CH2- is not replaced.

[0181] n represents an integer of 0 to 4, preferably an integer of 0 to 3, more preferably an integer of 0 to 2, further preferably an integer of 0 or 1, and even more preferably 0.

[0182] *-OCO-R ea4 The bonding position of the group (* represents a bond to the phenyl group) is the *-OCO-R ea4 The group may be bonded to any of the 2-, 3- or 4-positions of the phenyl group, but is preferably bonded to the 3- or 4-position, more preferably to the 4-position.

[0183] R ea1 The branched hydrocarbon group having 3 to 20 carbon atoms represented by the formula: A branched saturated hydrocarbon group having 3 to 20 carbon atoms is preferred. A branched alkyl group having 3 to 20 carbon atoms is more preferable. A branched alkyl group having 3 to 10 carbon atoms is more preferable. At least one selected from the group consisting of 1-methylpentyl group, 2-methylpentyl group, 3-methylpentyl group, 1-ethylpentyl group, 2-ethylpentyl group, 3-ethylpentyl group, 1-methylhexyl group, 2-methylhexyl group, 3-methylhexyl group, 1-ethylhexyl group, 2-ethylhexyl group, 3-ethylhexyl group, 1-methylheptyl group, 2-methylheptyl group, 3-methylheptyl group, 1-ethylheptyl group, 2-ethylheptyl group and 3-ethylheptyl group is preferable.

[0184] R ea2 , R ea3 , R ea4 and R ea5 The hydrocarbon group having 1 to 20 carbon atoms represented by a saturated hydrocarbon group having 1 to 20 carbon atoms or an unsaturated hydrocarbon group having 2 to 20 carbon atoms is preferable, a saturated hydrocarbon group having 1 to 20 carbon atoms is more preferable, a linear saturated hydrocarbon group having 1 to 10 carbon atoms is still more preferable, a linear alkyl group having 1 to 8 carbon atoms is even more preferable. R ea2 is preferably a linear alkyl group having 1 to 8 carbon atoms, more preferably a linear alkyl group having 1 to 6 carbon atoms. R ea3 is preferably a linear alkyl group having 1 to 8 carbon atoms, more preferably a linear alkyl group having 1 to 3 carbon atoms. R ea4 is preferably a linear alkyl group having 1 to 8 carbon atoms, more preferably a linear alkyl group having 1 to 3 carbon atoms. R ea5 is preferably a linear or branched alkyl group having 1 to 8 carbon atoms, more preferably a linear or branched alkyl group having 1 to 6 carbon atoms.

[0185] Further, as the polymerization initiator (E), a compound represented by the formula (EB) can be mentioned. By including a compound represented by the formula (EB) as the polymerization initiator (E), the pre-baking temperature and the thermosetting temperature of the coating film of the curable composition can be lowered, and the arithmetic mean roughness of the cured film can be reduced.

[0186] [Chemical formula] [In the formula, R eb1 represents a branched hydrocarbon group having 3 to 20 carbon atoms which may have a substituent. R eb2 ~R eb4 each independently represents a hydrocarbon group having 1 to 20 carbon atoms which may have a substituent. m represents any integer from 0 to 4. The -CH2- contained in the hydrocarbon group may be replaced by -O-, -S-, -CO- or -OCO-.

[0187] R eb1 Examples of the branched hydrocarbon group having 3 to 20 carbon atoms represented by include a branched saturated hydrocarbon group having 3 to 20 carbon atoms, a branched unsaturated hydrocarbon group having 3 to 20 carbon atoms, and the like.

[0188] R eb1 Examples of the branched saturated hydrocarbon group having 3 to 20 carbon atoms represented by are the same as those exemplified above for the branched saturated hydrocarbon group having 3 to 20 carbon atoms represented by R ea1 . R eb1 The branched alkyl group represented by may be any of a primary branched alkyl group, a secondary branched alkyl group, or a tertiary branched alkyl group. R eb1 The number of carbon atoms of the branched saturated hydrocarbon group represented by is preferably 4 or more, more preferably 5 or more, preferably 16 or less, more preferably 12 or less, and even more preferably 10 or less.

[0189] R eb1 Examples of the branched unsaturated hydrocarbon group represented by include a group in which at least one carbon-carbon single bond contained in the branched saturated hydrocarbon group represented by the aforementioned R eb1 is replaced by a carbon-carbon double bond or a carbon-carbon triple bond. R eb1Examples of the branched unsaturated hydrocarbon group represented by include alkenyl groups such as isopropenyl group, isobutenyl group, isopentenyl group, isohexenyl group, isoheptenyl group, isooctenyl group, isononyl group, isodecenyl group, etc.; alkynyl groups such as isopropynyl group, isobutinyl group, isopentynyl group, isohexynyl group, isoheptynyl group, isooctynyl group, isononynyl group, isodecynyl group, etc.; and the like. R eb1 The number of carbon atoms of the branched unsaturated hydrocarbon group represented by is preferably 4 or more, more preferably 5 or more, preferably 16 or less, more preferably 12 or less, and even more preferably 10 or less.

[0190] R eb2 R eb3 R eb4 Examples of the hydrocarbon group having 1 to 20 carbon atoms represented by include saturated hydrocarbon groups having 1 to 20 carbon atoms, unsaturated hydrocarbon groups having 2 to 20 carbon atoms, aromatic hydrocarbon groups having 6 to 20 carbon atoms, etc. The hydrocarbon groups represented by R , R , and R may be the same or different from each other. eb2 R eb3 R eb4 The hydrocarbon groups represented by may be the same or different from each other.

[0191] Examples of the saturated hydrocarbon group having 1 to 20 carbon atoms include linear alkyl groups such as methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, dodecyl group, hexadecyl group, icosyl group, etc.; branched-chain alkyl groups such as isopropyl group, isobutyl group, isopentyl group, neopentyl group, 2-ethylhexyl group, etc.; and alicyclic saturated hydrocarbon groups having 3 to 20 carbon atoms such as cyclopropyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, tricyclodecyl group, etc. The number of carbon atoms of the saturated hydrocarbon group is preferably 1 to 18, more preferably 1 to 15, even more preferably 1 to 10, and even more preferably 1 to 8.

[0192] Examples of the unsaturated hydrocarbon group having 2 to 20 carbon atoms include alkenyl groups such as vinyl group, allyl group, butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, hexadecenyl group, octadecenyl group, and icosenyl group; alkynyl groups such as ethynyl group, propynyl group, hexynyl group, decynyl group, and icosenyl group; cycloalkenyl groups such as cyclopentenyl group, cyclohexenyl group, and cycloheptenyl group; etc. The number of carbon atoms in the unsaturated hydrocarbon group is preferably 2 to 18, more preferably 2 to 15, and even more preferably 2 to 10.

[0193] Examples of the aromatic hydrocarbon group having 6 to 20 carbon atoms include a phenyl group, a xylyl group, a trimethylphenyl group, a dipropylphenyl group, a di(2,2-dimethylpropyl)phenyl group, a naphthyl group, a benzyl group, a phenylethyl group, a phenylbutyl group, etc. The number of carbon atoms in the aromatic hydrocarbon group is preferably 6 to 18, more preferably 6 to 15, and further preferably 6 to 12.

[0194] R eb1 , R eb2 , R eb3 and R eb4 Examples of the substituent that the hydrocarbon group represented by the formula (I) may have include a halogen atom, a cyano group, and a nitro group. The halogen atom is preferably a fluorine atom, a bromine atom, a chlorine atom, or an iodine atom, and more preferably a fluorine atom.

[0195] The -CH2- contained in the hydrocarbon group may be replaced by -O-, -S-, -CO- or -OCO-, in particular may be replaced by -O-, provided that adjacent -CH2- are not simultaneously replaced by the same group, and the terminal -CH2- is not replaced.

[0196] m represents an integer of 0 to 4, preferably an integer of 1 to 3, more preferably an integer of 2 or 3, and further preferably 3.

[0197] If m is 1 or more, then *-R eb4At least one of the 2-, 4- and 6-positions of the phenyl group to which is bonded, *-R eb4 (* represents a bond to a phenyl group) is preferably bonded, and *-R eb4 At least two of the 2-, 4-, and 6-positions of the phenyl group to which *-R is bonded eb4 is more preferably bonded, and *-R eb4 *-R is attached to all of the 2nd, 4th and 6th positions of the phenyl group to which eb4 It is more preferred that

[0198] R eb1 The branched hydrocarbon group having 3 to 20 carbon atoms represented by the formula: A branched saturated hydrocarbon group having 3 to 20 carbon atoms is preferred. A branched alkyl group having 3 to 20 carbon atoms is more preferable. A branched alkyl group having 3 to 10 carbon atoms is more preferable. It is preferable that the alkyl group is one or more selected from the group consisting of a 1-methylpentyl group, a 2-methylpentyl group, a 3-methylpentyl group, a 1-ethylpentyl group, a 2-ethylpentyl group, a 3-ethylpentyl group, a 1-methylhexyl group, a 2-methylhexyl group, a 3-methylhexyl group, a 1-ethylhexyl group, a 2-ethylhexyl group, a 3-ethylhexyl group, a 1-methylheptyl group, a 2-methylheptyl group, a 3-methylheptyl group, a 1-ethylheptyl group, a 2-ethylheptyl group, and a 3-ethylheptyl group.

[0199] R eb2 The hydrocarbon group having 1 to 20 carbon atoms represented by the formula (I) is preferably an aromatic hydrocarbon group having 6 to 20 carbon atoms, more preferably an aromatic hydrocarbon group having 6 to 17 carbon atoms, still more preferably an aromatic hydrocarbon group having 7 to 15 carbon atoms, and particularly preferably an aromatic hydrocarbon group having 8 to 13 carbon atoms. In any of these preferred embodiments, it is preferable that the hydrocarbon group has 1 to 8 (particularly 1 to 5) fluorine atoms as a substituent and has a structure in which 1 to 2 -CH2- are replaced with -O-.

[0200] R eb2In a preferred embodiment, the aromatic hydrocarbon group having 8 to 13 carbon atoms is preferably any one of the following (eb2-1) to (eb2-6).

[0201]

Chemical formula

[0202] R eb3 and R eb4 The hydrocarbon groups having 1 to 20 carbon atoms represented by are each independently a saturated hydrocarbon group having 1 to 20 carbon atoms or an unsaturated hydrocarbon group having 2 to 20 carbon atoms is preferred, a saturated hydrocarbon group having 1 to 20 carbon atoms is more preferred, a linear saturated hydrocarbon group having 1 to 10 carbon atoms is even more preferred, a linear alkyl group having 1 to 8 carbon atoms is still more preferred, and a linear alkyl group having 1 to 3 carbon atoms is particularly preferred.

[0203] In addition, when -CH2- contained in the hydrocarbon group in formula (EB) is replaced by -O-, -S-, -CO- or -OCO-, the carbon number of this replaced part shall be counted as the carbon number of -CH2- before replacement.

[0204] Examples of the polymerization initiator (E) other than the compound represented by formula (EA) include photopolymerization initiators such as oxime compounds (excluding the compounds represented by formula (EA) and formula (EB)), alkylphenone compounds, biimidazole compounds, triazine compounds and acylphosphine compounds, and thermal polymerization initiators such as azo compounds and organic peroxides.

[0205] An example of the oxime compound (excluding the compounds represented by formula (EA) and formula (EB)) is an oxime compound having the first molecular structure represented by the following formula (1). Hereinafter, this oxime compound is also referred to as "oxime compound (1)".

[0206]

Chemical formula

[0207] Including the oxime compound (1) as the polymerization initiator (E) can be advantageous from the viewpoint of improving the emission intensity. One of the reasons for such an effect is that due to the specific molecular structure of the oxime compound (1), when the oxime compound (1) initiates photopolymerization, the absorption wavelength of the oxime compound (1) changes greatly before and after the cleavage (decomposition) of the oxime compound (1) required, so it is presumed that the oxime compound (1) has a high ability to initiate photoradical polymerization.

[0208] In formula (1), R 1 represents R 11 , OR 11 , COR 11 , SR 11 , CONR 12 R 13 or CN.

[0209] R 11 , R 12 and R 13 each independently represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an aralkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms.

[0210] R 11 , R 12 or R 13 The hydrogen atom of the group represented by may be replaced by OR 21 , COR 21 , SR 21 , NR 22 R 23 , CONR 22 R 23 , -NR 22 -OR 23 , -N(COR 22 )-OCOR 23 , -C(=N-OR 21 )-R 22 , -C(=N-OCOR 21 )-R 22 , CN, a halogen atom, or COOR 21 and may be substituted.

[0211] R 21 、R 22 and R 23 each independently represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an aralkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms.

[0212] R 21 、R 22 or R 23 The hydrogen atom of the group represented by may be substituted with CN, a halogen atom, a hydroxy group, or a carboxy group.

[0213] R 11 、R 12 、R 13 、R 21 、R 22 or R 23 When the group represented by has an alkylene moiety, the alkylene moiety may be interrupted 1 to 5 times by -O-, -S-, -COO-, -OCO-, -NR 24 -, -NR 24 CO-, -NR 24 COO-, -OCONR 24 -, -SCO-, -COS-, -OCS-, or -CSO-.

[0214] R 24 represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an aralkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms.

[0215] R 11 、R 12 、R 13 、R 21 、R 22 or R 23 When the group represented by has an alkyl moiety, the alkyl moiety may be branched, cyclic, and also, R 12 and R 13 and R 22 and R 23 may each together form a ring.

[0216] * represents a bond with a second molecular structure which is a molecular structure other than the first molecular structure possessed by the oxime compound (1).

[0217] R in formula (1) 11 R 12 R 13 R 21 R 22 R 23 and R 24 Examples of the alkyl group having 1 to 20 carbon atoms represented by R

[0218] R in formula (1) 11 R 12 R 13 R 21 R 22 R 23 and R 24 Examples of the aryl group having 6 to 30 carbon atoms represented by R

[0219] R in formula (1) 11 R 12 R 13 R 21 R 22 R 23 and R 24 Examples of the aralkyl group having 7 to 30 carbon atoms represented by R

[0220] R in formula (1) 11 , R 12 , R 13 , R 21 , R 22 , R 23 and R 24 Examples of the heterocyclic group having 2 to 20 carbon atoms represented by include, for example, pyridyl group, pyrimidyl group, furyl group, thienyl group, tetrahydrofuryl group, dioxolanyl group, benzoxazol-2-yl group, tetrahydropyranyl group, pyrrolidyl group, imidazolidyl group, pyrazolidyl group, thiazolidyl group, isothiazolidyl group, oxazolidyl group, isoxazolidyl group, piperidyl group, piperazinyl group, morpholinyl group, etc. Among them, a 5- to 7-membered heterocycle is preferable.

[0221] R in formula (1) 12 and R 13 and R 22 and R 23 each may combine together to form a ring, which means that R 12 and R 13 and R 22 and R 23 each may combine together with the connecting nitrogen atom, carbon atom or oxygen atom to form a ring.

[0222] R in formula (1) 12 and R 13 and R 22 and R 23 Examples of the ring that can be formed by combining together include, for example, cyclopentane ring, cyclohexane ring, cyclopentene ring, benzene ring, piperidine ring, morpholine ring, lactone ring, lactam ring, etc. Among them, a 5- to 7-membered ring is preferable.

[0223] R in formula (1) 11 , R 12 , R 13 , R 21 , R 22 and R 23 Examples of the halogen atom that may be possessed as a substituent include fluorine atom, chlorine atom, bromine atom and iodine atom.

[0224] R in formula (1) 1 is preferably R 11 and more preferably an alkyl group having 1 to 20 carbon atoms, still more preferably an alkyl group having 1 to 10 carbon atoms, and even more preferably an alkyl group having 1 to 6 carbon atoms.

[0225] An example of the second molecular structure linked to the first molecular structure represented by formula (1) is the structure represented by the following formula (2). The second molecular structure means the other molecular structure part other than the above first molecular structure that the oxime compound (1) has.

[0226] In formula (2), the bond represented by "*" is directly bonded to the bond represented by "*" in formula (1). That is, when the second molecular structure is the structure represented by formula (2), the benzene ring having "-*" in formula (2) and the carbonyl group having "-*" in formula (1) are directly bonded.

[0227]

Chemical formula

[0228] In formula (2), R 2 and R 3 each independently represent R 11 , OR 11 , SR 11 , COR 11 , CONR 12 R 13 , NR 12 , COR 11 , OCOR 11 , COOR 11 , SCOR 11 , OCSR 11 , COSR 11 , CSOR 11 , CN or a halogen atom.

[0229] When there are a plurality of R 2 they may be the same or different.

[0230] R 3 When there are a plurality of them, they may be the same or different.

[0231] R 11 、R 12 and R 13 represent the same meaning as described above.

[0232] s and t each independently represent an integer from 0 to 4.

[0233] L is a sulfur atom, CR 31 R 32 、CO or NR 33 represents.

[0234] R 31 、R 32 and R 33 each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, or an aralkyl group having 7 to 30 carbon atoms.

[0235] R 31 、R 32 or R 33 When the group represented by has an alkyl moiety, the alkyl moiety may be branched or cyclic, and R 31 、R 32 and R 33 may each independently form a ring together with either adjacent benzene ring.

[0236] R 4 is a hydroxy group, a carboxy group or the following formula (2-1)

[0237]

Chemical formula

[0238] (In formula (2-1), L 1 is -O-, -S-, -NR 22 -, -NR 22 CO-, -SO2-, -CS-, -OCO- or -COO-.

[0239] R 22 represents the same meaning as described above.

[0240] L 2 represents a group obtained by removing v hydrogen atoms from an alkyl group having 1 to 20 carbon atoms, a group obtained by removing v hydrogen atoms from an aryl group having 6 to 30 carbon atoms, a group obtained by removing v hydrogen atoms from an aralkyl group having 7 to 30 carbon atoms, or a group obtained by removing v hydrogen atoms from a heterocyclic group having 2 to 20 carbon atoms.

[0241] L 2 When the group represented by has an alkylene moiety, the alkylene moiety may be interrupted 1 to 5 times by -O-, -S-, -COO-, -OCO-, -NR 22 -, -NR 22 COO-, -OCONR 22 -, -SCO-, -COS-, -OCS- or -CSO-, and the alkylene moiety may be branched or cyclic.

[0242] R 4a is OR 41 、SR 41 、CONR 42 R 43 、NR 42 COR 43 、OCOR 41 、COOR 41 、SCOR 41 、OCSR 41 、COSR 41 、CSOR 41 、CN or a halogen atom.

[0243] R 4a When there are a plurality of them, they may be the same or different.

[0244] R 41 、R 42 and R 43 each independently represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms or an aralkyl group having 7 to 30 carbon atoms, R 41 、R 42 and R43 When the group represented by has an alkyl moiety, the alkyl moiety may be branched or cyclic, and R 42 and R 43 may combine to form a ring.

[0245] v represents an integer from 1 to 3.) represents a group represented by.

[0246] * represents a bond with the first molecular structure of the oxime compound (1).

[0247] R in formula (2) 11 , R 12 , R 13 , R 21 , R 22 , R 23 , R 24 , R 31 , R 32 and R 33 , and R in the above formula (2-1) 22 , R 41 , R 42 and R 43 Examples of the alkyl group having 1 to 20 carbon atoms, aryl group having 6 to 30 carbon atoms, and aralkyl group having 7 to 30 carbon atoms represented by are the same as the examples for R 11 , R 12 , R 13 , R 21 , R 22 , R 23 and R 24 .

[0248] R in formula (2) 11 , R 12 , R 13 , R 21 , R 22 , R 23 , R 24 , and R in the above formula (2-1) 22 Examples of the heterocyclic group having 2 to 20 carbon atoms represented by are the same as the examples for R 11 , R 12 , R 13 , R 21 , R 22 , R 23 and R24 It is the same as the example for

[0249] R in formula (2) 31 , R 32 and R 33 each independently may combine with either adjacent benzene ring to form a ring, which means that R 31 , R 32 and R 33 each independently may combine with either adjacent benzene ring to form a ring together with the connecting nitrogen atom.

[0250] R in formula (2) 31 , R 32 and R 33 Examples of the ring that may be formed by combining with either adjacent benzene ring are the same as the examples of the ring that may be formed by combining R 12 with R 13 and R 2 with R 23 in formula (1).

[0251] L in the above formula (2-1) 2 represents a group obtained by removing v hydrogen atoms from an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an aralkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms.

[0252] Examples of the group obtained by removing v hydrogen atoms from an alkyl group having 1 to 20 carbon atoms include, for example, when v = 1, methylene group, ethylene group, propylene group, methylethylene group, butylene group, 1-methylpropylene group, 2-methylpropylene group, 1,2-dimethylpropylene group, 1,3-dimethylpropylene group, 1-methylbutylene group, 2-methylbutylene group, 3-methylbutylene group, 4-methylbutylene group, 2,4-dimethylbutylene group, 1,3-dimethylbutylene group, pentylene group, hexylene group, heptylene group, octylene group, nonylene group, decylene group, dodecylene group, tridecylene group, tetradecylene group, pentadecylene group, ethane-1,1-diyl group, propane-2,2-diyl group, and other alkylene groups.

[0253] Examples of the group formed by removing v hydrogen atoms from an aryl group having 6 to 30 carbon atoms include, when v = 1, an arylene group such as a 1,2-phenylene group, a 1,3-phenylene group, a 1,4-phenylene group, a 2,6-naphthylene group, a 1,4-naphthylene group, a 2,5-dimethyl-1,4-phenylene group, a diphenylmethane-4,4'-diyl group, a 2,2-diphenylpropane-4,4'-diyl group, a diphenylsulfide-4,4'-diyl group, and a diphenylsulfone-4,4'-diyl group.

[0254] Examples of the group formed by removing v hydrogen atoms from an aralkyl group having 7 to 30 carbon atoms include, when v = 1, a group represented by the following formula (a) and a group represented by the following formula (b).

[0255] [Chemical formula]

[0256] [In formulas (a) and (b), L 3 and L 5 represent an alkylene group having 1 to 10 carbon atoms, and L 4 and L 6 represent a single bond or an alkylene group having 1 to 10 carbon atoms.] Examples of the alkylene group having 1 to 10 carbon atoms include a methylene group, an ethylene group, a propylene group, a methylethylene group, a butylene group, a 1-methylpropylene group, a 2-methylpropylene group, a 1,2-dimethylpropylene group, a 1,3-dimethylpropylene group, a 1-methylbutylene group, a 2-methylbutylene group, a 3-methylbutylene group, a 4-methylbutylene group, a 2,4-dimethylbutylene group, a 1,3-dimethylbutylene group, a pentylene group, a hexylene group, a heptylene group, an octylene group, a nonylene group, and a decylene group.

[0257] Examples of the group obtained by removing v hydrogen atoms from a complex ring group having 2 to 20 carbon atoms include, for example, when v is 1, divalent complex ring groups such as 2,5-pyridinediyl group, 2,6-pyridinediyl group, 2,5-pyrimidinediyl group, 2,5-thiophenediyl group, 3,4-tetrahydrofuranediyl group, 2,5-tetrahydrofuranediyl group, 2,5-furandiyl group, 3,4-thiazolediy group, 2,5-benzofurandiyl group, 2,5-benzothiophenediyl group, N-methylindole-2,5-diyl group, 2,5-benzothiazolediy group, 2,5-benzoxazolediy group, and the like.

[0258] R in formula (2) 2 and R 3 , and examples of the halogen atom represented by R in the above formula (2-1) 4a include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

[0259] From the viewpoints of solubility in the solvent (J) and / or developability of the curable composition, a preferred example of the structure represented by formula (2) is a structure represented by the following formula (2a).

[0260]

Chemical formula

[0261] [In formula (2a), L'represents a sulfur atom or NR 50 , R 50 represents a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, R 2 , R 3 , R 4 , s and t represent the same meanings as described above.] From the same viewpoints as above, another preferred example of the structure represented by formula (2) is a structure represented by the following formula (2b).

[0262]

Chemical formula

[0263] [In formula (2b), R 44 represents a hydroxy group, a carboxy group or the following formula (2-2)

[0264] [Chemical formula]

[0265] (In formula (2-2), L 11 represents *-O- or *-OCO-, where * represents the bond with L 12 and L 12 represents an alkylene group having 1 to 20 carbon atoms, and the alkylene group may be interrupted by 1 to 3 -O-'s. R 44a represents OR 55 or COOR 55 and R 55 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.) represents a group represented by.) R 44 is preferably a group represented by formula (2-2). In this case, it is advantageous in terms of the solubility of the oxime compound (1) in the solvent (J) and the developability of the curable composition.)

[0266] L 12 The number of carbon atoms of the alkylene group represented by is preferably 1 to 10, more preferably 1 to 4.)

[0267] R 44a is preferably a hydroxy group or a carboxy group, more preferably a hydroxy group.)

[0268] The method for producing the oxime compound (1) having the second molecular structure represented by formula (2) is not particularly limited, but for example, it can be produced by the method described in JP-A-2011-132215.)

[0269] Another example of the second molecular structure linked to the first molecular structure represented by formula (1) is a structure represented by the following formula (3).

[0270] In formula (3), the bond represented by "*" is directly bonded to the bond represented by "*" in formula (1). That is, when the second molecular structure is the structure represented by formula (3), the benzene ring having "-*" in formula (3) and the carbonyl group having "-*" in formula (1) are directly bonded.

[0271]

Chemical formula

[0272] In formula (3), R 5 represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms.

[0273] R 5 When the group represented by has an alkyl moiety, the alkyl moiety may be branched or cyclic.

[0274] R 5 The hydrogen atom of the group represented by is R 21 , OR 21 , COR 21 , SR 21 , NR 22 R 23 , CONR 22 R 23 , -NR 22 -OR 23 , -N(COR 22 )-OCOR 23 , NR 22 COR 21 , OCOR 21 , COOR 21 , -C(=N-OR 21 )-R 22 , -C(=N-OCOR 21 )-R 22 , SCOR 21 , OCSR 21 , COSR 21 , CSOR 21 , a hydroxyl group, a nitro group, CN, a halogen atom, or COOR 21 and may be substituted.

[0275] R 21 、R 22 and R 23 have the same meaning as described above.

[0276] R 21 、R 22 or R 23 The hydrogen atom of the group represented by may be substituted with a CN, halogen atom, hydroxy group or carboxy group.

[0277] R 21 、R 22 and R 23 When the group represented by has an alkylene moiety, the alkylene moiety may be interrupted 1 to 5 times by -O-, -S-, -COO-, -OCO-, -NR 24 -, -NR 24 CO-, -NR 24 COO-, -OCONR 24 -, -SCO-, -COS-, -OCS- or -CSO-.

[0278] R 24 has the same meaning as described above.

[0279] R 21 、R 22 and R 23 When the group represented by has an alkyl moiety, the alkyl moiety may be branched or cyclic, and R 22 and R 23 may combine together to form a ring.

[0280] R 6 、R 7 、R 8 and R 9 each independently represent R 61 、OR 61 、SR 61 、COR 62 、CONR 63 R 64 、NR 65 COR 61 、OCOR 61 、COOR 62, SCOR 61 , OCSR 61 , COSR 62 , CSOR 61 , represents a hydroxyl group, nitro group, CN or halogen atom.

[0281] R 61 , R 62 , R 63 , R 64 and R 65 each independently represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms or a heterocyclic group having 2 to 20 carbon atoms.

[0282] R 61 , R 62 , R 63 , R 64 or R 65 The hydrogen atom of the group represented by is OR 21 , COR 21 , SR 21 , NR 22 R 23 , CONR 22 R 23 , -NR 22 -OR 23 , -N(COR 22 )-OCOR 23 , -C(=N-OR 21 )-R 22 , -C(=N-OCOR 21 )-R 22 , CN, halogen atom, or COOR 21 may be substituted.

[0283] R 6 and R 7 , R 7 and R 8 and R 8 and R 9 may together form a ring.

[0284] * represents a bond with the first molecular structure of the oxime compound (1).

[0285] R in formula (3) 5, R 21 , R 22 , R 23 , R 24 , R 61 , R 62 , R 63 , R 64 and R 65 Examples of the alkyl group having 1 to 20 carbon atoms, aryl group having 6 to 30 carbon atoms, aralkyl group having 7 to 30 carbon atoms, and heterocyclic group having 2 to 20 carbon atoms represented by are the same as the examples for R 11 , R 12 , R 13 , R 21 , R 22 , R 23 and R 24 are the same as those for.

[0286] R 22 and R 23 in formula (3) may combine to form a ring, which means that R 22 and R 23 may combine to form a ring together with the connecting nitrogen, carbon or oxygen atom.

[0287] Examples of the ring that R 22 and R 23 in formula (3) may combine to form are the same as the examples of the rings that R 12 and R 13 and R 22 and R 23 in formula (1) may combine to form.

[0288] Examples of the halogen atom represented by R 6 , R 7 , R 8 and R 9 in formula (3), and examples of the halogen atom that may substitute the hydrogen atom of R 5 , R 21 , R 22 , R 23 , R 61 , R 62 , R 63 , R 64 and R 65 include fluorine atom, chlorine atom, bromine atom and iodine atom.

[0289] From the viewpoint of solubility in the solvent (J) and / or developability of the curable composition, in one preferred embodiment, R 5 is a group represented by the following formula (3-1).

[0290] [Chemical formula]

[0291] [In formula (3-1), Z represents a group obtained by removing one hydrogen atom from an alkyl group having 1 to 20 carbon atoms, a group obtained by removing one hydrogen atom from an aryl group having 6 to 30 carbon atoms, a group obtained by removing one hydrogen atom from an aralkyl group having 7 to 30 carbon atoms, or a group obtained by removing one hydrogen atom from a heterocyclic group having 2 to 20 carbon atoms. When the group represented by Z has an alkylene moiety, the alkylene moiety may be interrupted 1 to 5 times by -O-, -S-, -COO-, -OCO-, -NR 24 -, -NR 24 COO-, -OCONR 24 -, -SCO-, -COS-, -OCS- or -CSO-, and the alkylene moiety may be branched or cyclic. R 21 , R 22 and R 24 represent the same meaning as described above.] From the same viewpoint as above, in formula (3-1), Z is preferably a methylene group, an ethylene group or a phenylene group.

[0292] In formula (3-1), R 21 and R 22 are preferably an alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 30 carbon atoms from the same viewpoint as above, and more preferably a methyl group, an ethyl group or a phenyl group.

[0293] From the same viewpoint as above, in another preferred embodiment, R 7 is a nitro group.

[0294] The method for producing the oxime compound (1) having the second molecular structure represented by the formula (3) is not particularly limited. For example, it can be produced by the methods described in JP-A-2000-80068 and JP-A-2011-178776.

[0295] Another example of the second molecular structure linked to the first molecular structure represented by the formula (1) is the structure represented by the following formula (4).

[0296] In the formula (4), the bond represented by "*" is directly bonded to the bond represented by "*" in the formula (1). That is, when the second molecular structure is the structure represented by the formula (4), the benzene ring having "-*" in the formula (4) and the carbonyl group having "-*" in the formula (1) are directly bonded.

[0297]

Chemical formula

[0298] In the formula (4), R 71 represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an aralkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms.

[0299] When the group represented by R 71 has an alkyl moiety, the alkyl moiety may be branched or cyclic.

[0300] The hydrogen atom of the group represented by R 71 is R 21 , OR 21 , COR 21 , SR 21 , NR 22 R 23 , CONR 22 R 23 , -NR 22 -OR 23 , -N(COR 22 )-OCOR 23 , NR 22 COR 21 , OCOR 21, COOR 21 , -C(=N-OR 21 )-R 22 , -C(=N-OCOR 21 )-R 22 , SCOR 21 , OCSR 21 , COSR 21 , CSOR 21 , a hydroxyl group, a nitro group, CN, a halogen atom, or COOR 21 may be substituted therewith.

[0301] R 21 , R 22 and R 23 represent the same meaning as described above.

[0302] R 21 , R 22 or R 23 The hydrogen atom of the group represented by may be substituted with CN, a halogen atom, a hydroxy group or a carboxy group.

[0303] R 21 , R 22 and R 23 When the group represented by has an alkylene moiety, the alkylene moiety may be interrupted 1 to 5 times by -O-, -S-, -COO-, -OCO-, -NR 24 -, -NR 24 CO-, -NR 24 COO-, -OCONR 24 -, -SCO-, -COS-, -OCS- or -CSO-.

[0304] R 24 represents the same meaning as described above.

[0305] R 21 , R 22 and R 23 When the group represented by has an alkyl moiety, the alkyl moiety may be branched, cyclic, and R 22 and R 23 may combine together to form a ring.

[0306] R72 and R 73 and three Rs 74 are each independently, R 61 OR 61 SR 61 COR 62 CONR 63 R 64 NR 65 COR 61 OCOR 61 COOR 62 SCOR 61 OCSR 61 COSR 62 CSOR 61 represent a hydroxyl group, nitro group, CN or halogen atom.

[0307] R 61 R 62 R 63 R 64 and R 65 each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms or a heterocyclic group having 2 to 20 carbon atoms.

[0308] R 61 R 62 R 63 R 64 or R 65 The hydrogen atom of the group represented by is OR 21 COR 21 SR 21 NR 22 R 23 CONR 22 R 23 -NR 22 -OR 23 -N(COR 22 )-OCOR 23 -C(=N-OR 21 )-R 22 -C(=N-OCOR 21 )-R 22 CN, a halogen atom, or COOR 21 and may be substituted.

[0309] R 72 and R73 and two Rs 74 may together form a ring.

[0310] * represents a bond with the first molecular structure of the oxime compound (1).

[0311] R in formula (4) 71 , R 21 , R 22 , R 23 , R 24 , R 61 , R 62 , R 63 , R 64 and R 65 Examples of the alkyl group having 1 to 20 carbon atoms, aryl group having 6 to 30 carbon atoms, aralkyl group having 7 to 30 carbon atoms, and heterocyclic group having 2 to 20 carbon atoms represented by are the same as the examples for R 11 , R 12 , R 13 , R 21 , R 22 , R 23 and R 24 in formula (1).

[0312] R in formula (4) 22 and R 23 may together form a ring means that R 22 and R 23 may together form a ring with the nitrogen atom, carbon atom or oxygen atom to which they are connected.

[0313] R in formula (4) 22 and R 23 Examples of the ring that can be formed together are the same as the examples of the rings that can be formed together by R 12 and R 13 and R 22 and R 23 in formula (1).

[0314] R in formula (4) 72 , R 73 and R 74 represented by the halogen atom, R 71 , R 21 , R22 , R 23 , R 61 , R 62 , R 63 , R 64 and R 65 Examples of halogen atoms that may replace the hydrogen atoms of R, R, R, R, R, and R include fluorine atoms, chlorine atoms, bromine atoms, and iodine atoms.

[0315] The method for producing the oxime compound (1) having the second molecular structure represented by the formula (4) is not particularly limited, and for example, it can be produced by the methods described in International Publication No. 2017 / 051680 and International Publication No. 2020 / 004601.

[0316] Another example of the second molecular structure linked to the first molecular structure represented by the formula (1) is the structure represented by the following formula (5).

[0317] In the formula (5), the bond represented by "*" is directly bonded to the bond represented by "*" in the formula (1). That is, when the second molecular structure is the structure represented by the formula (5), the pyrrole ring having "-*" in the formula (5) and the carbonyl group having "-*" in the formula (1) are directly bonded.

[0318]

Chemical formula

[0319] In the formula (5), R 81 represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an aralkyl group having 7 to 30 carbon atoms, or a heterocyclic group having 2 to 20 carbon atoms.

[0320] R 81 When the group represented by has an alkyl moiety, the alkyl moiety may be branched or cyclic.

[0321] R 81 The hydrogen atom of the group represented by is R 21 , OR 21 , COR 21, SR 21 , NR 22 R 23 , CONR 22 R 23 , -NR 22 , -OR 23 , -N(COR 22 )-OCOR 23 , NR 22 COR 21 , OCOR 21 , COOR 21 , -C(=N-OR 21 )-R 22 , -C(=N-OCOR 21 )-R 22 , SCOR 21 , OCSR 21 , COSR 21 , CSOR 21 , a hydroxyl group, a nitro group, CN, a halogen atom, or COOR 21 may be substituted.

[0322] R 21 R 22 and R 23 have the same meaning as described above.

[0323] R 21 R 22 or R 23 The hydrogen atom of the group represented by may be substituted with CN, a halogen atom, a hydroxy group or a carboxy group.

[0324] R 21 R 22 and R 23 When the group represented by has an alkylene moiety, the alkylene moiety is -O-, -S-, -COO-, -OCO-, -NR 24 -, -NR 24 CO-, -NR 24 COO-, -OCONR 24 -,-SCO-,-COS-,-OCS- or -CSO- may be interrupted 1 to 5 times.

[0325] R 24 has the same meaning as described above.

[0326] R 21 、R 22 and R 23 when the group represented by has an alkyl moiety, the alkyl moiety may be branched or cyclic, and R 22 and R 23 may combine together to form a ring.

[0327] R 82 、R 83 、R 84 、R 85 and R 86 are each independently R 61 、OR 61 、SR 61 、COR 62 、CONR 63 R 64 、NR 65 COR 61 、OCOR 61 、COOR 62 、SCOR 61 、OCSR 61 、COSR 62 、CSOR 61 、a hydroxyl group, a nitro group, CN or a halogen atom.

[0328] R 61 、R 62 、R 63 、R 64 and R 65 are each independently a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms or a heterocyclic group having 2 to 20 carbon atoms.

[0329] R 61 、R 62 、R 63 、R 64 or R 65 the hydrogen atom of the group represented by is OR 21 、COR 21 、SR 21 、NR 22 R 23 、CONR 22 R 23 、-NR 22 -OR23 , -N(COR 22 )-OCOR 23 , -C(=N-OR 21 )-R 22 , -C(=N-OCOR 21 )-R 22 , CN, a halogen atom, or COOR 21 may be substituted.

[0330] R 83 and R 84 , R 84 and R 85 and R 85 and R 86 may together form a ring.

[0331] * represents a bond with the first molecular structure of the oxime compound (1).

[0332] R in formula (5) 81 , R 21 , R 22 , R 23 , R 24 , R 61 , R 62 , R 63 , R 64 and R 65 Examples of the alkyl group having 1 to 20 carbon atoms, aryl group having 6 to 30 carbon atoms, aralkyl group having 7 to 30 carbon atoms, and heterocyclic group having 2 to 20 carbon atoms represented by are the same as the examples for R 11 , R 12 , R 13 , R 21 , R 22 , R 23 and R 24 in formula (1).

[0333] R in formula (5) 22 and R 23 may together form a ring means that R 22 and R 23 may together form a ring with the connecting nitrogen atom, carbon atom or oxygen atom.

[0334] R in formula (5)22 and R 23 Examples of rings that R 12 and R 13 and R 22 and R 23 can form together are the same as the examples of rings that can be formed together.

[0335] Examples of halogen atoms represented by R 82 , R 83 , R 84 , R 85 and R 86 in formula (5), and halogen atoms that may substitute the hydrogen atoms of R 81 , R 21 , R 22 , R 23 , R 61 , R 62 , R 63 , R 64 and R 65 include fluorine atom, chlorine atom, bromine atom and iodine atom.

[0336] The method for producing the oxime compound (1) having the second molecular structure represented by formula (5) is not particularly limited, and for example, it can be produced by the methods described in International Publication No. 2017 / 051680 and International Publication No. 2020 / 004601.

[0337] Still another example of the second molecular structure linked to the first molecular structure represented by formula (1) is the structure represented by the following formula (6).

[0338] In formula (6), the bond represented by "*" is directly bonded to the bond represented by "*" in formula (1). That is, when the second molecular structure is the structure represented by formula (6), the benzene ring having "-*" in formula (6) and the carbonyl group having "-*" in formula (1) are directly bonded.

[0339]

Chemical formula

[0340] In formula (6), the four Rs 91 , R 92 , R 93 , R 94 , R 95 , R 96 and R 97 each independently represent R 61 , OR 61 , SR 61 , COR 62 , CONR 63 R 64 , NR 65 COR 61 , OCOR 61 , COOR 62 , SCOR 61 , OCSR 61 , COSR 62 , CSOR 61 , a hydroxyl group, a nitro group, CN or a halogen atom.

[0341] R 61 , R 62 , R 63 , R 64 and R 65 each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an arylalkyl group having 7 to 30 carbon atoms or a heterocyclic group having 2 to 20 carbon atoms.

[0342] R 61 , R 62 , R 63 , R 64 or R 65 in the group represented by is OR 21 , COR 21 , SR 21 , NR 22 R 23 , CONR 22 R 23 , -NR 22 -OR 23 , -N(COR 22 )-OCOR 23 , -C(=N-OR 21 )-R 22 , -C(=N-OCOR 21 )-R 22 , CN, a halogen atom, or COOR 21may be replaced.

[0343] R 21 、R 22 and R 23 represent the same meaning as described above.

[0344] R 92 and R 93 、R 94 and R 95 、R 95 and R 96 and R 96 and R 97 may together form a ring.

[0345] * represents a bond with the first molecular structure of the oxime compound (1).

[0346] R in formula (6) 21 、R 22 、R 23 、R 61 、R 62 、R 63 、R 64 and R 65 Examples of alkyl groups having 1 to 20 carbon atoms, aryl groups having 6 to 30 carbon atoms, aralkyl groups having 7 to 30 carbon atoms, and heterocyclic groups having 2 to 20 carbon atoms represented by are the same as the examples for R in formula (1) 11 、R 12 、R 13 、R 21 、R 22 and R 23 is the same.

[0347] R in formula (6) 22 and R 23 may together form a ring means that R 22 and R 23 may together form a ring with the connecting nitrogen atom, carbon atom or oxygen atom.

[0348] R in formula (6) 22 and R 23 Examples of rings that can be formed together are R in formula (1) 12 and R 13and R 22 and R 23 is the same as the example of the ring that can be formed by combining them together.

[0349] R in formula (6) 91 、R 92 、R 93 、R 94 、R 95 、R 96 and R 97 and the halogen atoms represented by R 21 、R 22 、R 23 、R 61 、R 62 、R 63 、R 64 and R 65 Examples of the halogen atoms that may substitute the hydrogen atoms of R, R, R, R, R, R, R, R, R, and R include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

[0350] The method for producing the oxime compound (1) having the second molecular structure represented by formula (6) is not particularly limited, and for example, it can be produced by the methods described in International Publication No. 2017 / 051680 and International Publication No. 2020 / 004601.

[0351] Examples of the oxime compound that is other than the compound represented by formula (EA) and other than the oxime compound (1) include an oxime compound having a partial structure represented by the following formula (d1). * represents a bond.

[0352]

Chemical formula

[0353] Examples of the oxime compound having the partial structure represented by the formula (d1) include N-benzoyloxy-1-(4-phenylsulfanylphenyl)butane-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)octane-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)-3-cyclopentylpropane-1-one-2-imine, N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethane-1-imine, N-acetoxy-1-[9-ethyl-6-{2-methyl-4-(3,3-dimethyl-2,4-dioxacyclopentanylmethyloxy)benzoyl}-9H-carbazol-3-yl]ethane-1-imine, N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-3-cyclopentylpropane-1-imine, N-benzoyloxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-3-cyclopentylpropane-1-one-2-imine; compounds described in JP-A-2011-132215, WO2008 / 78678, WO2008 / 78686, WO2012 / 132558, etc. may be mentioned. Commercially available products such as Irgacure OXE01 (N-benzoyloxy-1-(4-phenylsulfanylphenyl)octane-1-one-2-imine), OXE02 (N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethane-1-imine) (manufactured by BASF), N-1919 (manufactured by ADEKA), etc. may also be used.

[0354] Among them, the oxime compound having the partial structure represented by the formula (d1) is preferably at least one selected from the group consisting of N-benzoyloxy-1-(4-phenylsulfanylphenyl)butane-1-one-2-imine, N-benzoyloxy-1-(4-phenylsulfanylphenyl)octane-1-one-2-imine, N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethane-1-imine, and N-benzoyloxy-1-(4-phenylsulfanylphenyl)-3-cyclopentylpropane-1-one-2-imine, and more preferably N-benzoyloxy-1-(4-phenylsulfanylphenyl)octane-1-one-2-imine or N-acetoxy-1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethane-1-imine.

[0355] The alkylphenone compound is a compound having a partial structure represented by the following formula (d2) or a partial structure represented by the following formula (d3). In these partial structures, the benzene ring may have a substituent. * represents a bond.

[0356]

Chemical formula

[0357] Examples of the compound having the structure represented by the formula (d2) include 2-methyl-2-morpholino-1-(4-methylsulfanylphenyl)propan-1-one, 2-dimethylamino-1-(4-morpholinophenyl)-2-benzylbutan-1-one, 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-morpholinyl)phenyl]butan-1-one, etc. Commercially available products such as OMNIRAD (registered trademark) 369, 907, 379 (manufactured by IGM Resins) may also be used.

[0358] Examples of the compound having the structure represented by the formula (d3) include 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]propan-1-one, 1-hydroxycyclohexyl phenyl ketone, oligomers of 2-hydroxy-2-methyl-1-(4-isopropenylphenyl)propan-1-one, α,α-diethoxyacetophenone, benzyldimethyl ketal, and the like.

[0359] In terms of sensitivity, as the alkylphenone compound, a compound having the structure represented by the formula (d2) is preferable.

[0360] Examples of the biimidazole compound include, for example, the compound represented by the formula (d5).

[0361] [Chemical formula]

[0362] [In the formula (d5), R E ~R J each represents an aryl group having 6 to 10 carbon atoms which may have a substituent.] Examples of the aryl group having 6 to 10 carbon atoms include a phenyl group, a toluyl group, a xylyl group, an ethylphenyl group, a naphthyl group, and the like, and a phenyl group is preferable.

[0363] Examples of the substituent include a halogen atom, an alkoxy group having 1 to 4 carbon atoms, and the like. Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom, and a chlorine atom is preferable. Examples of the alkoxy group having 1 to 4 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, a butoxy group, and the like, and a methoxy group is preferable.

[0364] Examples of the biimidazole compound include 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2,3-dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole (see, for example, JP-A-06-75372 and JP-A-06-75373), 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(alkoxyphenyl)biimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(dialkoxyphenyl)biimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(trialkoxyphenyl)biimidazole (see, for example, JP-B-48-38403 and JP-A-62-174204), biimidazole compounds in which the phenyl groups at the 4,4',5,5'-positions are substituted with carboxyalkoxy groups (see, for example, JP-A-7-10913), and the like. Among them, compounds represented by the following formula or mixtures thereof are preferred.

[0365] [Chemical formula]

[0366] Examples of the triazine compound include 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-piperonyl-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(5-methylfuran-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(4-dimethylamino-2-methylphenyl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)ethenyl]-1,3,5-triazine, etc. Among them, 2,4-bis(trichloromethyl)-6-piperonyl-1,3,5-triazine is preferred.

[0367] Examples of the acylphosphine compound include bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, (2,4,6-trimethylbenzoyl)diphenylphosphine oxide, etc.

[0368] Another example of the photopolymerization initiator includes, for example, benzoin compounds such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether; benzophenone compounds such as benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3',4,4'-tetra(tert-butylperoxycarbonyl)benzophenone, 2,4,6-trimethylbenzophenone, 4,4'-bis(diethylamino)benzophenone; quinone compounds such as 9,10-phenanthrenequinone, 2-ethylanthraquinone, camphorquinone; 10-butyl-2-chloroacridone, benzyl, methyl phenylglyoxylate, titanocene compounds, etc.

[0369] The content of the polymerization initiator (E) in the curable composition is preferably 0.1 part by mass or more and 300 parts by mass or less, more preferably 0.1 part by mass or more and 200 parts by mass or less, based on 100 parts by mass of the polymerizable compound (D). Further, the content of the polymerization initiator (E) in the curable composition is preferably 0.1 part by mass or more and 30 parts by mass or less, more preferably 0.5 part by mass or more and 20 parts by mass or less, based on 100 parts by mass of the total amount of the resin (C) and the polymerizable compound (D). When the content of the polymerization initiator (E) is within the above range, the pre-baking and thermosetting temperatures of the coating film of the curable composition can be lowered, and the arithmetic mean roughness of the cured film can be reduced.

[0370] The content ratio of the polymerization initiator (E) in the curable composition is, for example, 0.01% by mass or more and 20% by mass or less, preferably 0.1% by mass or more and 15% by mass or less, more preferably 0.2% by mass or more and 10% by mass or less, still more preferably 0.3% by mass or more and 8% by mass or less, even more preferably 0.5% by mass or more and 5% by mass or less, particularly preferably 3% by mass or less, based on the total amount of the solid content of the curable composition.

[0371] The polymerization initiator (E) preferably contains at least one of the compound represented by the formula (EA) and the compound represented by the formula (EB), and more preferably contains at least one of the compounds represented by the formula (EA). As described above, both the compound represented by the formula (EA) and the compound represented by the formula (EB) can lower the pre-baking and thermosetting temperatures of the coating film of the curable composition and reduce the arithmetic mean roughness of the cured film, and the compound represented by the formula (EA) can further improve the fluorescence emission intensity. The content ratio of the compound represented by the formula (EA) is preferably 50% by mass or more, more preferably 80% by mass or more, still more preferably 100% by mass (that is, the polymerization initiator (E) contains the compound represented by the formula (EA) and does not contain the compound represented by the formula (EB)), based on 100% by mass of the total amount of the compound represented by the formula (EA) and the compound represented by the formula (EB).

[0372] When the polymerization initiator (E) contains at least one of the compound represented by formula (EA) and the compound represented by formula (EB), the total content of the compound represented by formula (EA) and the compound represented by formula (EB) in the polymerization initiator (E) is preferably 30 mass% or more and 100 mass% or less, more preferably 50 mass% or more and 100 mass% or less, even more preferably 70 mass% or more and 100 mass% or less, still more preferably 80 mass% or more and 100 mass% or less, especially preferably 90 mass% or more and 100 mass% or less, particularly preferably 95 mass% or more and 100 mass% or less, and may be 100 mass%.

[0373] <Light stabilizer (F)> The light stabilizer (F) may be any additive that has the effect of stabilizing components against light, including known light stabilizers (Fa), and the light stabilizer (F) of the present invention also includes an antioxidant (Fb) and an ultraviolet absorber (Fc) that absorbs light and renders it harmless. The curable composition may contain two or more types of light stabilizers (F).

[0374] <Light stabilizer (Fa)> Examples of the light stabilizer (Fa) include hindered amine-based light stabilizers, acrylate-based light stabilizers, nickel-based light stabilizers, and oxamide-based light stabilizers.

[0375] <Antioxidants (Fb)> The antioxidant (Fb) is not particularly limited as long as it is an antioxidant generally used industrially, and may be a phenol-based antioxidant, a phosphorus-based antioxidant, a phosphorus / phenol complex type antioxidant, a sulfur-based antioxidant, etc. The curable composition may contain two or more types of antioxidants (Fb).

[0376] The phosphorus / phenol complex type antioxidant is, for example, a compound having one or more phosphorus atoms and one or more phenol structures in the molecule. Among them, from the viewpoint of the developability and luminescence intensity of the curable composition, it is preferable that the antioxidant (Fb) contains a phosphorus / phenol complex type antioxidant.

[0377] Examples of phenolic antioxidants include Irganox (registered trademark) 1010 (Irganox 1010: pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], manufactured by BASF Corporation), 1076 (Irganox 1076: octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, manufactured by BASF Corporation), 1330 (Irganox 1330: 3,3’,3’’,5,5’,5’’-hexa-tert-butyl-a,a’,a’’-(mesitylene-2,4,6-triyl)tri-p-cresol, manufactured by BASF Corporation), 3114 (Irganox 3114: 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, manufactured by BASF Corporation), 3790 (Irganox 3790: 1,3,5-tris((4-tert-butyl-3-hydroxy-2,6-xylyl)methyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, manufactured by BASF Corporation), 1035 (Irganox 1035: thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], manufactured by BASF Corporation), 1135 (Irganox 1135: 3,5-bis(1,1-dimethylethyl)-4-hydroxy-C7-C9 branched alkyl ester of benzenepropanoic acid, manufactured by BASF Corporation), 1520L (Irganox 1520L: 4,6-bis(octylthiomethyl)-o-cresol, manufactured by BASF Corporation), 3125 (Irganox 3125, manufactured by BASF Corporation), 565 (Irganox 565: 2,4-bis(n-octylthio)-6-(4-hydroxy-3’,5’-di-tert-butylanilino)-1,3,5-triazine, manufactured by BASF Corporation), AdekaStab (registered trademark) AO-80 (AdekaStab AO-80: 3,9-bis(2-(3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy)-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro(5,5) Undecane (manufactured by ADEKA Co., Ltd.), Sumilizer (registered trademark) BHT, Sumilizer GA-80, and Sumilizer GS (all manufactured by Sumitomo Chemical Co., Ltd.), Cyanox (registered trademark) 1790 (manufactured by Cytec Co., Ltd.), and Vitamin E (manufactured by Eisai Co., Ltd.).

[0378] Examples of phosphorus-based antioxidants include Irgafos (registered trademark) 168 (Irgafos 168: tris(2,4-di-tert-butylphenyl)phosphite, manufactured by BASF Co., Ltd.), Irgafos 12 (Irgafos 12: tris[2-[[2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphine-6-yl]oxy]ethyl]amine, manufactured by BASF Co., Ltd.), Irgafos 38 (Irgafos 38: bis(2,4-bis(1,1-dimethylethyl)-6-methylphenyl)ethyl ester phosphorous acid, manufactured by BASF Co., Ltd.), Adeka STAB (registered trademark) 329K, Adeka STAB PEP36, Adeka STAB PEP-8 (all manufactured by ADEKA Co., Ltd.), Sandstab Examples of such antibacterial agents include P-EPQ (manufactured by Clariant), Weston (registered trademark) 618, Weston 619G (all manufactured by GE), and Ultranox 626 (manufactured by GE).

[0379] Examples of phosphorus / phenol complex antioxidants include Sumilizer (registered trademark) GP (6-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-tert-butyldibenz[d,f][1.3.2]dioxaphosphepine) (manufactured by Sumitomo Chemical Co., Ltd.).

[0380] Examples of the sulfur-based antioxidant include dialkyl thiodipropionate compounds such as dilauryl, dimyristyl, and distearyl thiodipropionate, and β-alkyl mercaptopropionate compounds of polyols such as tetrakis[methylene(3-dodecylthio)propionate]methane.

[0381] <Ultraviolet absorber (Fc)> Examples of the ultraviolet absorber (Fc) include benzotriazole compounds such as 2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-5-chlorobenzotriazole and 2-(2,4-dihydroxyphenyl)-2H-benzotriazole; benzophenone compounds such as 2-hydroxy-4-octyloxybenzophenone; benzoate compounds such as 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate; triazine compounds such as 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexyloxyphenol; and the like.

[0382] The content of the light stabilizer (F) in the curable composition (total amount in the case of multiple types) is, for example, 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the resin (C), and from the viewpoint of emission intensity, preferably 5 parts by mass or more and 40 parts by mass or less, more preferably 7 parts by mass or more and 30 parts by mass or less.

[0383] When the curable composition contains a light stabilizer (F), the light stabilizer (F) is preferably an antioxidant (Fb) and / or an ultraviolet absorber (Fc).

[0384] <Leveling agent (H)> Examples of the leveling agent (H) include silicone surfactants, fluorine surfactants, and silicone surfactants having fluorine atoms. These may have a polymerizable group in the side chain. The leveling agent (H) preferably contains a silicone surfactant. The curable composition may contain two or more leveling agents (H).

[0385] Examples of silicone surfactants include surfactants having a siloxane bond in the molecule. Specifically, Toray Silicone DC3PA, SH7PA, DC11PA, SH21PA, SH28PA, SH29PA, SH30PA, SH8400 (trade name: manufactured by Toray Dow Corning Co., Ltd.), KP321, KP322, KP323, KP324, KP326, KP340, KP341 (manufactured by Shin-Etsu Chemical Co., Ltd.), TSF400, TSF401, TSF410, TSF4300, TSF4440, TSF4445, TSF4446, TSF4452, and TSF4460 (manufactured by Momentive Performance Materials Japan LLC) and the like can be mentioned.

[0386] Examples of fluorosurfactants include surfactants having a fluorocarbon chain in the molecule. Specifically, Fluorad (registered trademark) FC430, FC431 (manufactured by Sumitomo 3M Limited), Megafac (registered trademark) F142D, F171, F172, F173, F177, F183, F554, F575, R30, RS-718-K (manufactured by DIC Corporation), F-Top (registered trademark) EF301, EF303, EF351, EF352 (manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.), Surflon (registered trademark) S381, S382, SC101, SC105 (manufactured by Asahi Glass Co., Ltd.), and E5844 (manufactured by Daikin Fine Chemical Research Institute Co., Ltd.) and the like can be mentioned.

[0387] Examples of silicone surfactants having a fluorine atom include surfactants having a siloxane bond and a fluorocarbon chain in the molecule. Specifically, Megafac (registered trademark) R08, BL20, F475, F477, and F443 (manufactured by DIC Corporation) and the like can be mentioned.

[0388] When the curable composition contains a leveling agent (H), the content of the leveling agent (H) in the curable composition is, for example, 0.001% by mass or more and 1.0% by mass or less, preferably 0.005% by mass or more and 0.75% by mass or less, more preferably 0.01% by mass or more and 0.5% by mass or less, based on the total amount of the curable composition. When the content of the leveling agent (H) is within the above range, the flatness when the cured film is used as a wavelength conversion layer can be made better.

[0389] <Solvent (J)> Solvent (J) dissolves resin (C) and the polymerizable compound (D) and polymerization initiator (E) used in a preferred embodiment. Examples of the solvent (J) include ester solvents (solvents containing -COO- in the molecule and not containing -O-), ether solvents (solvents containing -O- in the molecule and not containing -COO-), ether ester solvents (solvents containing -COO- and -O- in the molecule), ketone solvents (solvents containing -CO- in the molecule and not containing -COO-), alcohol solvents (solvents containing OH in the molecule and not containing -O-, -CO- and COO-), aromatic hydrocarbon solvents, amide solvents, dimethyl sulfoxide and the like.

[0390] Examples of the ester solvent include methyl lactate, ethyl lactate, n-butyl lactate, methyl 2-hydroxyisobutyrate, ethyl acetate, n-butyl acetate, isobutyl acetate, n-pentyl formate, isopentyl acetate, n-butyl propionate, isopropyl butyrate, ethyl butyrate, n-butyl butyrate, methyl pyruvate, ethyl pyruvate, propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, cyclohexyl acetate and γ-butyrolactone.

[0391] Examples of the ether solvent include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, 3-methoxy-1-butanol, 3-methoxy-3-methylbutanol, tetrahydrofuran, tetrahydropyran, 1,4-dioxane, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether, anisole, phenetole, methyl anisole and the like.

[0392] Examples of the ether ester solvent include methyl methoxyacetate, ethyl methoxyacetate, butyl methoxyacetate, methyl ethoxyacetate, ethyl ethoxyacetate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, methyl 2-methoxypropionate, ethyl 2-methoxypropionate, propyl 2-methoxypropionate, methyl 2-ethoxypropionate, ethyl 2-ethoxypropionate, methyl 2-methoxy-2-methylpropionate, ethyl 2-ethoxy-2-methylpropionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate and the like.

[0393] Examples of the ketone solvent include 4-hydroxy-4-methyl-2-pentanone, acetone, 2-butanone, 2-heptanone, 3-heptanone, 4-heptanone, 4-methyl-2-pentanone, cyclopentanone, cyclohexanone, isophorone, and the like.

[0394] Examples of the alcohol solvent include methanol, ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, propylene glycol, glycerin, and the like.

[0395] Examples of the aromatic hydrocarbon solvent include benzene, toluene, xylene, mesitylene, and the like.

[0396] Examples of the amide solvent include N,N-dimethylformamide, N,N-dimethylacetamide, N-methylpyrrolidone, and the like.

[0397] The solvent (J) preferably contains one or more selected from the group consisting of propylene glycol monomethyl ether acetate, ethyl lactate, propylene glycol monomethyl ether, cyclohexyl acetate, ethyl 3-ethoxypropionate, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, 4-hydroxy-4-methyl-2-pentanone, and aromatic hydrocarbon solvents.

[0398] The solvent (J) is preferably propylene glycol monomethyl ether acetate, ethyl lactate, propylene glycol monomethyl ether, cyclohexyl acetate, ethyl 3-ethoxypropionate, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, 4-hydroxy-4-methyl-2-pentanone or toluene, or a mixture of two or more thereof.

[0399] The solvent (J) is a component other than the solid content, and solvents contained in, for example, a dispersion of semiconductor particles (A) or a solution of resin (C) are also included in the solvent (J).

[0400] The content rate of the solvent (J) in the curable composition is the ratio of the total mass of all solvents contained in the curable composition to the total amount of the curable composition, and is, for example, 40% by mass or more and 95% by mass or less, preferably 50% by mass or more and 90% by mass or less with respect to the total amount of the curable composition. In other words, the solid content of the curable composition is, for example, 5% by mass or more and 60% by mass or less, preferably 10% by mass or more and 50% by mass or less. When the content rate of the solvent (J) is within the above range, the flatness of the curable composition layer during coating becomes better, and it tends to be easier to form a wavelength conversion layer with an appropriate thickness.

[0401] <Other components> The curable composition may further contain additives known in the art, such as a polymerization inhibitor, a filler, other polymer compounds, an adhesion promoter, a chain transfer agent, etc., as necessary.

[0402] <<Method for producing curable composition>> The curable composition can be produced by a method including a step of mixing predetermined components and other components used as necessary. The method for producing the curable composition can further include a step of preparing the resin (C). Among the components contained in the curable composition, the semiconductor particles (A) and the light scattering agent (B) may be mixed with a part or all of the solvent (J) in advance and then mixed with other components.

[0403] <<Method for producing cured film>> The cured film according to the present invention can be produced by a production method including a step of applying a curable composition containing semiconductor particles (A) and resin (C), and a thermal curing step of thermally curing the coating film of the curable composition (hereinafter also referred to as "composition layer"). It is preferable to include an exposure step of irradiating light to the coating film of the curable composition after the step of applying the curable composition, and it is more preferable to carry out the thermal curing step after the exposure step.

[0404] The method for manufacturing the cured film may include other steps than the above steps. Examples of other steps include a drying step of drying the composition layer formed by the coating step, a developing step performed on the composition layer after the exposure step, and the like. The cured film may be formed over the entire surface of the substrate, or may be formed as a cured pattern on a part of the substrate surface. In this specification, the cured pattern is a form of the cured film and refers to a cured film formed in a pattern shape.

[0405] The curable composition used for forming the cured film contains semiconductor particles (A) and a resin (C), and examples thereof are the curable compositions described in the above <Curable Composition>.

[0406] The coating step is a step of coating the curable composition on a substrate to form a composition layer. Examples of the coating method include a spin coating method, a slit coating method, a slit and spin coating method, a printing method, and the like. In the printing method, the curable composition is applied through a mask provided on the substrate, and after the mask is peeled off from the substrate, the composition layer formed by the coating step is cured, whereby a cured film can be formed as a cured pattern on a part of the substrate surface.

[0407] Examples of the substrate include glass plates such as quartz glass, borosilicate glass, aluminosilicate glass, and soda lime glass with a silica-coated surface, resin plates such as polycarbonate, polymethyl methacrylate, and polyethylene terephthalate, silicon, and those with an aluminum, silver, silver / copper / palladium alloy thin film, etc. formed on the above substrate. The substrate is preferably a glass plate, a silicon substrate, or the like.

[0408] The substrate may be one that has been subjected to a pretreatment capable of adjusting the wettability of the substrate surface. Examples of the pretreatment include solvent cleaning with alcohol or acetone, acid treatment, alkali treatment, plasma treatment, corona treatment, and the like. By selecting an appropriate pretreatment for the substrate on which the cured film is to be laminated, the coatability of the curable composition can be improved compared to an untreated substrate.

[0409] When the curable composition contains a solvent (J), it is preferable to perform a drying step of removing volatile components such as the solvent (J) from the composition layer after the coating step. The drying step may include a heat drying (pre-baking) treatment, a reduced pressure drying treatment, or both of these. When performing heat drying, the temperature is preferably 30°C or higher and lower than 100°C, more preferably 50°C or higher and 95°C or lower. The heating time is preferably 10 seconds or longer and 60 minutes or shorter, more preferably 30 seconds or longer and 30 minutes or shorter. When performing reduced pressure drying, it is preferably performed under a pressure of 50 Pa or higher and 150 Pa or lower in a temperature range of 20°C or higher and 25°C or lower.

[0410] The film thickness of the composition layer after the coating step or the drying step is not particularly limited and may be appropriately selected according to the film thickness of the target cured film. For example, it is 0.5 μm or more and 10 μm or less, preferably 1 μm or more and 9 μm or less, more preferably 1.5 μm or more and 7 μm or less, and even more preferably 2 μm or more and 5 μm or less. The film thickness of the finally obtained cured film may be the same as above.

[0411] Next, it is preferable to perform an exposure step on the composition layer after the coating step or the drying step. The exposed composition layer cures by polymerization of the polymerizable compound (D) etc. contained in the composition layer including the preferred embodiments. As the light source used for exposure, a light source that generates light with a wavelength of 250 nm or more and 450 nm or less is preferable. When the curable composition contains a photoinitiator (E), light near 436 nm, near 408 nm, or near 365 nm may be selectively extracted by a band-pass filter from the light of the above wavelength according to the absorption wavelength of the photoinitiator (E). Specific examples of the light source include a mercury lamp, a light-emitting diode, a metal halide lamp, a halogen lamp, etc.

[0412] The exposure amount X in the exposure step is preferably 50 mJ / cm 2 or more, more preferably 80 mJ / cm 2 or more, even more preferably 100 mJ / cm 2More preferably, it is 150 mJ / cm or more. 2 or more. The exposure dose X is usually 1000 mJ / cm or less, 2 preferably 800 mJ / cm or less, 2 more preferably 700 mJ / cm or less. 2 When the exposure dose X in the exposure process is 1000 mJ / cm or less, 2 it is possible to prevent the cured film from shrinking too much, so it is possible to prevent the proximity of the semiconductor particles (A) in the film due to the shrinkage of the cured film, and it is possible to prevent the decrease in the emission light intensity. The exposure dose X is the exposure dose based on a wavelength of 365 nm and can be measured using an ultraviolet integrated light meter (UIT-250, manufactured by Ushio Inc.).

[0413] As an example of a method for forming a cured pattern which is one aspect of the cured film, a photolithography method can be mentioned. The photolithography method is a method of exposing and developing a composition layer through a photomask for forming a target cured pattern. In this case, since it is possible to irradiate parallel light rays uniformly over the entire exposure surface, or to perform accurate alignment between the photomask and the substrate on which the composition layer is formed, it is preferable to use an exposure apparatus such as a mask aligner and a stepper.

[0414] By subjecting the composition layer after the exposure process to a development process of bringing it into contact with a developer and developing it, the unexposed portion of the composition layer is dissolved and removed by the developer, and a pattern is imparted to the composition layer. Examples of the developer include aqueous solutions of alkaline compounds such as potassium hydroxide, sodium hydrogen carbonate, sodium carbonate, and tetramethylammonium hydroxide, and organic solvents. The concentration in the aqueous solution of the alkaline compound is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.03% by mass or more and 5% by mass or less. Examples of the organic solvent include the same ones as the above-mentioned solvent (J). The developer may contain a surfactant. The development method may be any of a paddle method, a dipping method, a spray method, etc. Further, the substrate may be tilted at an arbitrary angle during development.

[0415] The composition layer after the exposure process or after the development process is thermally cured (post-baked) in the thermal curing process. By the thermal curing process, the polymerization of the resin (C), the polymerizable compound (D), etc. including the preferred embodiments can be further advanced, and the resistance to solvents is improved as compared with before the post-baking.

[0416] The thermal curing temperature in the thermal curing process carried out after the exposure process or after the development process is preferably 150°C or lower, more preferably 120°C or lower, still more preferably less than 100°C, and particularly preferably 95°C or lower. By setting such a temperature range, the hardness of the cured film can be made soft and the surface roughness of the cured film can be reduced. The thermal curing temperature is preferably 70°C or higher, more preferably 80°C or higher, and still more preferably 85°C or higher from the viewpoint of ensuring a predetermined or higher hardness of the film.

[0417] The thermal curing time in the thermal curing process is preferably 0.1 hr or more, more preferably 0.2 hr or more, still more preferably 0.4 hr or more, and even more preferably 0.5 hr or more. The thermal curing time is usually 2 hr or less, preferably 1.5 hr or less, and more preferably 1.2 hr or less.

[0418] The thermal curing process can be carried out in an air atmosphere, or can also be carried out in a vacuum atmosphere from the viewpoints of ensuring a predetermined or higher Martens hardness of the obtained cured film and increasing the emitted light intensity of the cured film. The vacuum atmosphere means a pressure range of 150 Pa or less, preferably 120 Pa or less, more preferably 100 Pa or less, and may be 50 Pa or more.

[0419] The temperatures in the above-described drying process (particularly heat drying) and thermal curing process are both preferably less than 100°C, and both are more preferably 95°C or lower.

[0420] <<Display device>> Since the cured film has the function of converting the wavelength of the irradiated light, it can be used as a color conversion layer (wavelength conversion film) of a display device. Examples of such display devices include those described in JP-A-2006-309219, JP-A-2006-310303, JP-A-2013-15812, JP-A-2009-251129, JP-A-2014-2363, and the like. The cured film according to the present invention is useful as a color conversion layer (wavelength conversion film) of a display device, particularly a liquid crystal display device, an organic EL display device, or an inorganic EL display device.

Examples

[0421] Hereinafter, the present invention will be described in more detail with reference to examples. In the examples, “%” and “parts” are mass % and parts by mass, respectively, unless otherwise specified. Unless otherwise specified.

[0422] [Measurement of Fluorescent Emission Intensity of Cured Film] A surface-emitting backlight illumination (OPSM series: manufactured by Optrex Corporation) equipped with an LED lamp having an emission peak wavelength of 450 nm and a diffusion plate was prepared as a backlight. The backlight was installed with the diffusion plate facing upward, and a spectro-radiometer (SR-UL1R: manufactured by Topcon Technology House) was installed at a position 60 cm above the surface of the diffusion plate. A glass substrate (Eagle 2000: manufactured by Corning Incorporated) was installed on the surface of the diffusion plate of the backlight as a reference. In this state, the backlight was turned on, and the integrated value of the spectro-radiance in the wavelength range of 380 nm or more and 480 nm or less of the backlight was adjusted to 2.69 W·sr -1 ·m -2 through the glass substrate as a reference. Next, the glass substrate as a reference was removed, and a 5 cm square substrate having a cured film made from the composition was placed on the surface of the diffusion plate of the backlight. In this state, the backlight was turned on, and the emission intensity (unit: mW·sr ―1 ·m ―2 ) was measured as the integrated spectro-radiance in the wavelength range of 480 nm or more and 780 nm or less for the light emitted from the cured film.

[0423] [Measurement of Martens Hardness of Hardened Film] For the hardened film formed on the substrate, a Vickers indenter was attached to a ultra-micro hardness tester (manufactured by Fischer Instruments, FISCHERSCOPE HM2000), and a load-unload test was conducted in accordance with ISO 14577 to measure the load / push-in curve. The measurement temperature was room temperature. Here, the maximum test load was 0.5 mN, the holding time was 30 seconds, and the load was unloaded to 0 mN. The measurement data was processed by WIN-HCU (manufactured by Fischer Instruments) to obtain the Martens hardness (MPa). The measurement was carried out at three arbitrary locations, and the arithmetic mean value of the three locations was obtained.

[0424] [Surface Roughness of Hardened Film] For the hardened film formed on the substrate, the arithmetic mean roughness Ra was obtained in accordance with JIS B0601.

[0425] [Thickness of Hardened Film] It was measured by a film thickness measuring device (DEKTAKXT; manufactured by Bruker).

[0426] [Weight-Average Molecular Weight] The measurement of the weight-average molecular weight (Mw) of resin (C) was carried out by the GPC method under the following conditions. Device: K2479 (manufactured by Shimadzu Corporation) Column: SHIMADZU Shim-pack GPC-80M Column Temperature: 40 °C Solvent: Tetrahydrofuran Flow Rate: 1.0 mL / min Detector: RI Standard Substance for Calibration: TSK STANDARD POLYSTYRENE F-40, F-4, F-288, A-2500, A-500 (manufactured by Tosoh Corporation)

[0427] [Acid Value] Weigh accurately 3 g of the resin (C) solution, dissolve it in a mixed solvent of 90 g of acetone and 10 g of water, and use a 0.1 N aqueous KOH solution as the titrant. Measure the acid value of the resin (C) solution with an automatic titrator (manufactured by Hiranuma Sangyo Co., Ltd., trade name: COM-555), and determine the acid value per gram of solid content (AV) from the acid value of the solution and the solid content of the solution.

[0428] [Double bond equivalent] The double bond equivalent was determined by dividing the total mass of the curable resin by the number of moles of radically polymerizable double bonds introduced into the curable resin.

[0429] [Solid content] Weigh approximately 1 g of the resin (C) solution into an aluminum cup, dry it at 180 °C for 1 hour, and then measure the mass. Calculate the solid content (mass%) of the resin (C) solution from the mass reduction.

[0430] (Synthesis Example 1: Synthesis of Resin (C1)) Place 276.8 g of propylene glycol monomethyl ether acetate in a flask equipped with a stirrer, a dropping funnel, a condenser, a thermometer, and a gas inlet tube. Stir while purging with nitrogen and heat to 120 °C. Then, add 35.3 g of t-butyl peroxy-2-ethylhexanoate (polymerization initiator) to the monomer mixture consisting of 92.4 g of 2-ethylhexyl acrylate, 184.9 g of glycidyl methacrylate, and 12.3 g of dicyclopentanyl methacrylate, and drop the resulting mixture into the flask from the dropping funnel over 2 hours. After completion of the dropping, stir at 120 °C for an additional 30 minutes to carry out a copolymerization reaction to produce an addition copolymer.

[0431] Thereafter, the inside of the flask was replaced with air, 93.7 g of acrylic acid, 1.5 g of triphenylphosphine (catalyst), and 0.8 g of methoquinone (polymerization inhibitor) were added to the above addition copolymer solution, and the reaction was continued at 110 °C for 10 hours. The epoxy group derived from glycidyl methacrylate reacted with acrylic acid to cleave the epoxy group and simultaneously introduce a polymerizable unsaturated bond into the side chain of the polymer. Next, 53.5 g of succinic anhydride was added to the reaction system, and the reaction was continued at 110 °C for 1 hour. The hydroxy group generated by the cleavage of the epoxy group was reacted with succinic anhydride to introduce a carboxyl group into the side chain, and a polymer (resin (C1)) was obtained.

[0432] Finally, 436.0 g of propylene glycol monomethyl ether acetate was added to the reaction solution to obtain a resin (C1) solution with a polymer solid content of 40%.

[0433] The weight average molecular weight Mw of the produced resin (C1) was 6.7×10 3 , and the acid value in terms of solid content was 70 mg-KOH / g, and the double bond equivalent was 336 g / eq.

[0434] (Synthesis Example 2: Synthesis of Resin (C2)) 276.8 g of propylene glycol monomethyl ether acetate was placed in a flask equipped with a stirrer, a dropping funnel, a condenser, a thermometer, and a gas inlet tube, and the temperature was raised to 120 °C while stirring under nitrogen substitution. Next, a monomer mixture consisting of 92.4 g of 2-ethylhexyl acrylate, 184.9 g of glycidyl methacrylate, and 12.3 g of dicyclopentanyl methacrylate, to which 35.3 g of t-butylperoxy-2-ethylhexanoate (polymerization initiator) was added, was dropped into the flask from the dropping funnel over 2 hours. After completion of the dropping, the mixture was further stirred at 120 °C for 30 minutes to carry out a copolymerization reaction to produce an addition copolymer.

[0435] Thereafter, the inside of the flask was replaced with air, 93.7 g of acrylic acid, 1.5 g of triphenylphosphine (catalyst), and 0.8 g of methoquinone (polymerization inhibitor) were added into the above addition copolymer solution, and the reaction was continued at 110 °C for 10 hours. The epoxy group derived from glycidyl methacrylate reacted with acrylic acid to cleave the epoxy group and simultaneously introduce a polymerizable unsaturated bond into the side chain of the polymer. Next, 24.2 g of succinic anhydride was added to the reaction system, and the reaction was continued at 110 °C for 1 hour. The hydroxyl group generated by the cleavage of the epoxy group reacted with succinic anhydride to introduce a carboxyl group into the side chain, and a polymer (resin (C2)) was obtained.

[0436] Finally, 383.3 g of propylene glycol monomethyl ether acetate was added to the reaction solution to obtain a resin (C2) solution with a polymer solid content of 40%.

[0437] The weight average molecular weight Mw of the produced copolymer was 6.2×10 3 , the acid value in terms of solid content was 35 mg-KOH / g, and the double bond equivalent was 313 g / eq.

[0438] (Preparation Example 1: Preparation of Dispersion Liquid b of Semiconductor Particles (A)) A toluene dispersion liquid a of semiconductor particles (A1) [green light-emitting InP / ZnSeS quantum dots] containing oleic acid as an organic ligand (G1) was prepared. After removing toluene from the above toluene dispersion liquid a by vacuum distillation, 70 parts of cyclohexyl acetate was added to 30 parts of the total amount of the solid content (semiconductor particles (A) and organic ligand (G)) to obtain a dispersion liquid b of semiconductor particles (A).

[0439] The composition ratio of the semiconductor particles (A) and the organic ligand (G) was measured by TG-DTA measurement for the mixture after removing toluene, heating it to 550 °C at a heating rate of 5 °C / min, and measuring the remaining amount. The remaining amount was calculated as the weight of the semiconductor particles (A).

[0440] (Preparation Example 2: Preparation of Dispersion Liquid c of Light Scattering Agent (B)) To 70 parts of titanium oxide nanoparticles (B1), 3 parts by solid content of BYK-LPN21116 (manufactured by BYK-Chemie Japan) and propylene glycol monomethyl ether acetate (hereinafter referred to as "PGMEA") were added so that the total amount became 100 parts, and then stirred with a paint shaker until sufficiently dispersed to obtain a dispersion liquid c (solid content 73%) of the light scattering agent (B1).

[0441] (Preparation Examples 3 to 7: Preparation of Curable Compositions 1 to 5) A dispersion liquid b of semiconductor particles (A), a dispersion liquid c of a light scattering agent (B), and each component were mixed to prepare curable compositions 1 to 5 having the compositions shown in Table 1. In Table 1, the number of parts of components other than the solvent (J) indicates the value in terms of solid content.

[0442]

Table 1

[0443] Polymerizable compound (D1): Carboxy group-containing polyfunctional (meth)acrylate (trade name "Aronix (registered trademark) M-510" manufactured by Toagosei Co., Ltd.) Polymerizable compound (D2): Ethylene oxide-modified bisphenol A diacrylate, average molecular weight Mw is 512 Polymerizable compound (D3): Dipentaerythritol polyacrylate (5 to 6 functional groups) Polymerization initiator (E1): Compound represented by the following formula (EA-1)

[0444]

Chemical formula

[0445] Polymerization initiator (E2): Compound represented by the following formula (EB-1)

[0446]

Chemical formula

[0447] Antioxidant (Fb1): "Sumilizer (registered trademark) GP", a product of Sumitomo Chemical Co., Ltd. Leveling agent (H1): Polyether-modified silicone oil ("Toray silicone SH8400", a product of Toray Dow Corning Co., Ltd.) Dispersant (I1): BYK-LPN21116 (manufactured by BYK-Chemie Japan) Solvent (J1): A mixture of PGMEA (propylene glycol monomethyl ether acetate) and cyclohexyl acetate

[0448] (Example 1) On a 5 cm square glass substrate (Eagle 2000; manufactured by Corning), the curable composition 1 obtained in Preparation Example 3 was applied by spin coating so that the film thickness after post-baking was 5 μm, and then a drying step (pre-bake) at 70 °C for 1 minute was performed to form a film of the curable composition 1. After cooling, using an exposure machine (UPE-1255MA; manufactured by USHIO Lighting Co., Ltd.), under an air atmosphere, light irradiation was performed at an exposure dose of 200 mJ / cm 2 (based on a wavelength of 365 nm) to perform an exposure step, and a heat curing step was performed by performing a heat curing treatment (post-bake) at 95 °C for 30 minutes to obtain a substrate having a cured film.

[0449] (Examples 2 to 10, Comparative Examples 1 to 8) Except that the type of curable composition used, the film thickness (μm) of the cured film, the drying temperature (°C) of the drying step, and the heat curing temperature (°C) in the heat curing step were as shown in Tables 2 and 3, the drying step, exposure step, and heat curing step were performed in the same manner as in Example 1 to obtain a substrate having a cured film.

[0450] The measurement results are shown in Tables 2 and 3.

[0451]

Table 2

[0452]

Table 3

Claims

1. A cured film of a curable composition containing semiconductor particles (A) and a resin (C), the cured film having a martens hardness of 5 MPa or more and 95 MPa or less.

2. The cured film according to claim 1, wherein the acid value of the resin (C) is 150 mg-KOH / g or less.

3. The cured film according to claim 1, wherein the mass ratio (A / C) of the semiconductor particles (A) to the resin (C) is 0.6 or more and less than 10.

4. The cured film according to claim 1, wherein the curable composition further contains a polymerizable compound (D).

5. The cured film according to claim 4, wherein the polymerizable compound (D) contains a polymerizable compound having one or more cyclic hydrocarbon groups and two ethylenically unsaturated bonds in one molecule.

6. The cured film according to claim 1, wherein the curable composition further contains a light scattering agent (B).

7. A display device including the cured film according to any one of claims 1 to 6.

Images