Composition and member

Abstract

A composition comprising, in mass%, 2-20% one or more photochromic dyes, 3-15% resin, and 65-95% solvent, wherein the photochromic dyes include one or more dyes selected from among materials represented by formula (1). (In the formula, X represents a hydrogen atom, a halogen atom, or a C1-C10 linear, branched, or cyclic substituent optionally containing one or more atoms selected from among nitrogen, sulfur, and oxygen atoms, Y1 and Y2 each represent a carbon atom or a nitrogen atom, and R1, R2, R3, and R4 each represent a hydrogen atom or a C1-C10 linear, branched, or cyclic substituent optionally containing one or more atoms selected from among nitrogen, sulfur, and oxygen atoms, with the proviso that R1 and R2, if bonded to each other, represent a cyclic substituent including R1 and R2, and that R3 and R4, if bonded to each other, represent a cyclic substituent including R3 and R4.)

Description

Composition, member

[0001] The present invention relates to a composition and a member.

[0002] There is a demand for materials and members that can be easily used for inspecting the performance of camera lenses and the performance of various devices using light sources.

[0003] Japanese Patent Application Laid-Open No. 7-120922

[0004] One aspect of the present invention is a composition containing, in mass%, 2% or more and 20% or less of a photochromic dye, 3% or more and 15% or less of a resin, and 65% or more and 95% or less of a solvent, wherein the photochromic dye is one or more selected from the materials represented by the following formula (1).

[0005] (In the formula, X represents a hydrogen atom, a halogen atom, or a linear, branched, or cyclic substituent having 1 to 10 carbon atoms optionally containing one or more nitrogen, sulfur, or oxygen atoms, and Y １ , Y ２ represents a carbon atom or a nitrogen atom, and R 1 , R ２ , R ３ , R ４ represents a hydrogen atom or a linear, branched, or cyclic substituent having 1 to 10 carbon atoms optionally containing one or more nitrogen, sulfur, or oxygen atoms, provided that when R １ and R ２ have a structure in which they are bonded to each other, a cyclic substituent containing R １ and R ２ ; and when R ３ and R ４ have a structure in which they are bonded to each other, a cyclic substituent containing R ３ and R ４ is represented. )

[0006] Another aspect of the present invention is a member having a substrate and a photochromic layer provided on the substrate and containing a photochromic dye and a resin, wherein the mass ratio of the photochromic dye to the resin in the photochromic layer is 0.25 or more and 1.35 or less, and the photochromic dye is a material represented by the following formula (1).

[0007] (In the formula, X represents a linear, branched, or cyclic substituent having 1 to 10 carbon atoms, which contains one or more hydrogen atoms, halogen atoms, or optionally nitrogen atoms, sulfur atoms, or oxygen atoms, and Y １ , Y ２ represents a carbon atom or a nitrogen atom, R 1 , R ２ , R ３ , R ４ R represents a linear, branched, or cyclic substituent having 1 to 10 carbon atoms, which contains one or more hydrogen atoms, or optionally one nitrogen atom, one sulfur atom, or one oxygen atom, however R １ and R ２ If they have a structure that connects them to each other, R １ and R ２ A cyclic substituent including R ３ and R ４ If they have a structure that connects them to each other, R ３ and R ４ (Represents a cyclic substituent including .)

[0008] Another aspect of the present invention is a component comprising a substrate and a photochromic layer provided on the substrate, the photochromic layer comprising a photochromic dye and a resin, wherein the mass ratio of the photochromic dye to the resin in the photochromic layer is 0.25 or more and 1.35 or less, and the photochromic dye is one or more materials selected from the materials represented by the following formulas (1-a) to (1-d).

[0009]

[0010] Formula (1-a) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2-d-5-phenylthiophene], formula (1-b) is 1,2-bis(2-methylbenzo[b]thiophen-3-yl)hexafluorocyclopenten, formula (1-c) is 4,4'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[5-methyl-2-phenylthiazole], and formula (1-d) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2,4-dimethyl-5-phenylthiophene].

[0011] Another aspect of the present invention has a substrate, a light reflection layer provided on the substrate, and a photochromic layer provided on the light reflection layer and containing a photochromic dye and a resin, and the light reflection layer is a member having a reflectance of 50% or more with respect to light having a wavelength of 500 nm.

[0012] It is a figure which shows the coloring pattern of an Example and a comparative example.

[0013] Hereinafter, a mode for carrying out the present invention (hereinafter, simply referred to as "the present embodiment") will be described in detail. The following present embodiment is an exemplification for explaining the present invention and is not intended to limit the present invention to the following contents.

[0014] <Composition> The composition according to the present embodiment contains a photochromic dye, a resin, and a solvent.

[0015] If the content of the photochromic dye in the composition according to the present embodiment is too small, the coloring will be insufficient, and if it is too large, the composition cannot be kept uniform, and the dye will precipitate and solidify. From such a viewpoint, the content rate of the photochromic dye in the composition according to the present embodiment is 2% or more and 20% or less in mass%. The lower limit of the content rate of the photochromic dye may be 3%, or may be 5%. The upper limit of the content rate of the photochromic dye may be 15%, or may be 10%.

[0016] The photochromic dye is one or more selected from the materials represented by the following formula (1).

[0017] (In the formula, X represents a hydrogen atom, a halogen atom, or an optionally linear, branched, or cyclic substituent having 1 to 10 carbon atoms containing one or more nitrogen atoms, sulfur atoms, or oxygen atoms, and Y １ , Y ２ represents a carbon atom or a nitrogen atom, and R 1 , R ２ , R ３ , R ４ represents a hydrogen atom, or an optionally linear, branched, or cyclic substituent having 1 to 10 carbon atoms containing one or more nitrogen atoms, sulfur atoms, or oxygen atoms, provided that R １ and R ２If they have a structure that connects them to each other, R １ and R ２ A cyclic substituent including R ３ and R ４ If they have a structure that connects them to each other, R ３ and R ４ (Represents a cyclic substituent including .)

[0018] Each substituent in the formula may have a different structure independently, preferably R １ , R ３ It contains aromatic carbon.

[0019] The photochromic dye is preferably one or more materials selected from the materials represented by the following formulas (1-a) to (1-d).

[0020]

[0021] Formula (1-a) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2-d-5-phenylthiophene], formula (1-b) is 1,2-bis(2-methylbenzo[b]thiophen-3-yl)hexafluorocyclopenten, formula (1-c) is 4,4'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[5-methyl-2-phenylthiazole], and formula (1-d) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2,4-dimethyl-5-phenylthiophene].

[0022] The materials shown in formula (1) and formulas (1-a) to (1-d) can be commercially available, for example, from Yamada Chemical Industries, Ltd. Photochromic dyes can also be synthesized by the synthesis method described later.

[0023] If the resin content in the composition according to this embodiment is too low, pigment aggregation will occur after film formation, resulting in a thin film thickness. Conversely, if the resin content is too high, the viscosity will increase, making it difficult to form a uniform film. From this viewpoint, the resin content in the composition according to this embodiment is 3% or more and 15% or less by mass. The lower limit of the resin content may be 4% or 5%. The upper limit of the resin content may be 13% or 10%.

[0024] The mass ratio of the photochromic dye to the resin is 0.25 or more and 1.35 or less. The lower limit of this mass ratio may be 0.40 or 0.50. The upper limit of this mass ratio may be 1.10 or 0.80.

[0025] The resin has a transmittance of 80% or more for light with a wavelength of 500 nm. The lower limit of the transmittance of the resin for light with a wavelength of 500 nm may be 85%, or it may be 90%. The upper limit of the transmittance of the resin for light with a wavelength of 500 nm is, for example, 100%.

[0026] The resins include epoxy resins, acrylic resins, urethane resins, phenolic resins, polyester resins, polycarbonate resins, polyolefin resins, silicone resins, etc., and are preferably PMMA (polymethyl methacrylate). PMMA (polymethyl methacrylate) can be commercially available, for example, from Merck KGaA.

[0027] The solvent content in the composition according to this embodiment is 65% or more and 95% or less by mass. The lower limit of the solvent content may be 67%, 68%, or 70%. The upper limit of the solvent content may be 90% or 85%.

[0028] The solvent can be a ketone solvent, alcohol solvent, glycol solvent, ether solvent, aromatic solvent, etc., and is preferably PEGMA (polyethylene glycol monomethacrylate).

[0029] The composition according to this embodiment may contain a light stabilizer. The coloring reaction of the photochromic dye is caused by irradiation with ultraviolet light, and the fading reaction is caused by irradiation with visible light; coloring and fading are reversible reactions. However, if the photochromic dye is irradiated with ultraviolet light excessively, the coloring becomes stronger and the time until fading is prolonged. In addition, if the photochromic dye is irradiated with ultraviolet light excessively, an isomerization reaction that prevents fading may occur. By containing a light stabilizer, the composition according to this embodiment can shorten the fading time of the photochromic dye and can also prevent the isomerization reaction that hinders fading.

[0030] The external content of the light stabilizer relative to 100% by mass of the composition is 0.1% or more and 5% or less. The lower limit of this external content may be 0.5% or 1.0%. The upper limit of this external content may be 4% or 3%. In this specification, the external content of the light stabilizer relative to 100% by mass of the composition is expressed as the mass of the light stabilizer relative to the sum of the mass of all components other than the light stabilizer and the mass of the light stabilizer, when the total mass content of all components other than the light stabilizer is taken as 100%, and expressed in mass %.

[0031] The light stabilizer is a compound that includes, for example, a tetramethylpiperidine derivative as part of its structure, such as the one shown in formula (3) below, and compounds represented by formulas (4) to (7) below can be preferably used.

[0032] (In the formula, R independently represents a hydrogen atom, an oxygen atom, or a linear, branched, or cyclic substituent having 1 to 6 carbon atoms, and the substituent may contain one or more oxygen atoms. R may also be a radical.)

[0033]

[0034]

[0035]

[0036]

[0037] The light stabilizers shown in formulas (4) to (7) can be commercially available, for example, from Tokyo Chemical Industry Co., Ltd., etc. Alternatively, the light stabilizers can be synthesized by the synthesis method described later.

[0038] <Components> An example of a component according to this embodiment includes a substrate and a photochromic layer provided on the substrate. The photochromic layer includes a photochromic dye and a resin. Another example of a component according to this embodiment includes a substrate, a light-reflecting layer provided on the substrate, and a photochromic layer provided on the light-reflecting layer. The photochromic layer includes a photochromic dye and a resin.

[0039] The photochromic layer may optionally contain a light stabilizer.

[0040] The mass ratio of the photochromic dye to the resin in the photochromic layer is 0.25 or more and 1.35 or less. The lower limit of this mass ratio may be 0.40 or 0.50. The upper limit of this mass ratio may be 1.20 or 0.80.

[0041] The photochromic dye may be a material represented by the following formula (1).

[0042] (In the formula, X represents a linear, branched, or cyclic substituent having 1 to 10 carbon atoms, which contains one or more hydrogen atoms, halogen atoms, or optionally nitrogen atoms, sulfur atoms, or oxygen atoms, and Y １ , Y ２ represents a carbon atom or a nitrogen atom, R 1 , R ２ , R ３ , R ４ R represents a linear, branched, or cyclic substituent having 1 to 10 carbon atoms, which contains one or more hydrogen atoms, or optionally one nitrogen atom, one sulfur atom, or one oxygen atom, however R １ and R ２ If they have a structure that connects them to each other, R １ and R ２ A cyclic substituent including R ３ and R ４ If they have a structure that connects them to each other, R ３ and R４ (Represents a cyclic substituent including .)

[0043] Each substituent in the formula may have a different structure independently, preferably R １ , R ３ It contains aromatic carbon.

[0044] Furthermore, the photochromic dye may be one or more materials selected from the materials represented by the following formulas (1-a) to (1-d).

[0045]

[0046] Formula (1-a) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2-d-5-phenylthiophene], formula (1-b) is 1,2-bis(2-methylbenzo[b]thiophen-3-yl)hexafluorocyclopenten, formula (1-c) is 4,4'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[5-methyl-2-phenylthiazole], and formula (1-d) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2,4-dimethyl-5-phenylthiophene].

[0047] The materials shown in formula (1) and formulas (1-a) to (1-d) can be commercially available, for example, from Yamada Chemical Industries, Ltd. Photochromic dyes can also be synthesized by the synthesis method described later.

[0048] The resins include epoxy resins, acrylic resins, urethane resins, phenolic resins, polyester resins, polycarbonate resins, polyolefin resins, silicone resins, etc., and PMMA (polymethyl methacrylate) is preferred.

[0049] The substrate can be a quartz glass substrate, alkali-free glass substrate, borosilicate glass substrate, silicon substrate, ceramic substrate, plastic substrate, sapphire substrate, metal substrate, flexible substrate, or laminated substrate, and preferably a quartz glass substrate, alkali-free glass substrate, or silicon substrate. The thickness of the substrate is 5 μm or more and 15,000 μm or less.

[0050] A light-reflecting layer may be present between the substrate and the photochromic layer. The light-reflecting layer is provided to improve the contrast of the component according to this embodiment and to increase the brightness of bright areas during observation.

[0051] The light-reflecting layer has a reflectivity of 50% or more for light with a wavelength of 500 nm. The lower limit of the reflectivity of the light-reflecting layer for light with a wavelength of 500 nm may be 70% or 90%. The upper limit of the reflectivity of the light-reflecting layer for light with a wavelength of 500 nm is, for example, 100%.

[0052] The light-reflecting layer has a reflectance of 95% or less for light with a wavelength of 365 nm. The upper limit of the reflectance of the light-reflecting layer for light with a wavelength of 365 nm may be 65%, 50%, or 30%. The lower limit of the reflectance of the light-reflecting layer for light with a wavelength of 365 nm is, for example, 0%.

[0053] The reflectance of the two layers, the photochromic layer and the light-reflecting layer, for light with a wavelength of 365 nm is 50% or less. The upper limit of the reflectance of the two layers, the photochromic layer and the light-reflecting layer, for light with a wavelength of 365 nm may be 40% or 30%. The lower limit of the reflectance of the two layers, the photochromic layer and the light-reflecting layer, for light with a wavelength of 365 nm is, for example, 0%.

[0054] The light-reflecting layer includes one of the following: a metal film, a derivative multilayer film, or a polymer multilayer film. The light-reflecting layer is preferably made of a film such as chromium or aluminum.

[0055] The thickness of the light-reflecting layer is between 5 nm and 1000 nm.

[0056] The thickness of the photochromic layer is 2 μm or less. The upper limit of the photochromic layer thickness may be 1.8 μm or 1.7 μm. The lower limit of the photochromic layer thickness is, for example, 0.1 μm.

[0057] The component according to this embodiment allows the pattern to be confirmed by the change in color when exposed to light, thus eliminating the need for development and shortening the construction period. Furthermore, since it can be faded by exposure to white light, the component can be reused repeatedly.

[0058] <Method for synthesizing photochromic dyes> Compound 1-a can be synthesized by the following method.

[0059] The compound could be synthesized in 63% yield by reacting 3-bromo-2-methyl-5-phenylthiophene with n-BuLi in cold toluene and adding octafluorocyclopentene. The synthesis conditions can be found in J.A.C.S. (2000), 122(20), 4871-4876.

[0060] 3-Bromo-2-methyl-5-phenylthiophene could be synthesized in toluene with a yield of 92% by adding phenylboric acid under basic conditions to 3,5-dibromo-2-methylthiophene, followed by Pd(PPh3)4. The synthesis conditions can be found in J.A.C.S. (2018), 140(20), 6432-6440.

[0061] 3,5-dibromo-2-methylthiophene can be synthesized by mixing 1-bromopyrrolidine-2,5-dione with glacial acetic acid and adding N-bromosuccinimide. The synthesis conditions can be found in the European Journal of Organic Chemistry (2021), 2021(22), 3178-3189.

[0062] The present invention will be described in more detail by the following examples and comparative examples, but the present invention is not limited in any way by the following examples.

[0063] I. Preparation of Compositions (i) Compositions without Light Stabilizers Based on the compositions (mass%) described in Examples 1 to 14 and Comparative Examples 1 to 3, a photochromic dye solution was prepared by dissolving a photochromic dye and a resin (polymethyl methacrylate: PMMA) in a solvent (polyethylene glycol monomethacrylate: PEGMA). The photochromic dye solution was then sealed and heated to remove air bubbles, thereby obtaining each composition. The photochromic dyes used were compounds of the following formulas (1-a), (1-b), (1-c), (1-d), and (1-e) (manufactured by Yamada Chemical Industry Co., Ltd.).

[0064] (ii) Based on the composition (mass%) described in Example 15 of the composition containing a light stabilizer, a photochromic dye, a resin (polymethyl methacrylate: PMMA), and a light stabilizer of the following formula (6) (manufactured by Tokyo Chemical Industry Co., Ltd.) were dissolved in a solvent (polyethylene glycol monomethacrylate: PEGMA) to prepare a photochromic dye solution. The photochromic dye solution was then sealed and heated, and degassed to obtain the composition. The photochromic dye used was of the following formula (1-a) (manufactured by Yamada Chemical Industry Co., Ltd.).

[0065]

[0066]

[0067]

[0068]

[0069]

[0070]

[0071]

[0072] II. Preparation of Components (i) Components without a light-reflecting layer A solution containing a photochromic dye, resin (polymethyl methacrylate: PMMA), and solvent (polyethylene glycol monomethacrylate: PEGMA), weighed in the composition (mass%) described in Examples 1 to 14 and Comparative Examples 1 to 3, was spin-coated onto a 4-inch, 0.52 mm thick quartz glass plate to form a photochromic layer with a thickness of 1.5 μm, thereby obtaining a component.

[0073] (ii) Member having a light-reflective layer A chromium vapor-deposited film with a thickness of 100 nm was deposited as a light-reflective layer on a glass plate measuring 1100 mm - 1250 mm and 0.7 mm thick. Furthermore, a solution containing a photochromic dye, resin (polymethyl methacrylate: PMMA), and solvent (polyethylene glycol monomethacrylate: PEGMA), weighed according to the composition (mass%) described in Example 14, was slit-coated onto the chromium vapor-deposited film using a screen to form a photochromic layer with a thickness of 1.5 μm, thereby obtaining the member.

[0074] III. Evaluation of Color Patterns A bandpass filter with a metal frame was placed on a component (II. (i)) prepared using the compositions of Examples 1 to 13 and Comparative Examples 1 to 3, and an i-line with a wavelength of 365 nm was exposed at an exposure dose of 50 mJ / cm². ２ The material was irradiated (Ushio Optical Co., Ltd., MultiRide HB-25103BY-C). The irradiated area and the unirradiated area (where the bandpass filter was installed) were compared under fluorescent lighting to observe the coloring pattern. A coloring pattern was observed in the material using one of the dyes (1-a), (1-b), (1-c), or (1-d), but no coloring was observed in the material using the dye (1-e) (Figure 1).

[0075] IV. Fade Evaluation The composition of Example 14 and the composition of Example 15 were each deposited on a quartz substrate, and an i-line with a wavelength of 365 nm was exposed at an exposure dose of 600 mJ / cm². ２ The materials were irradiated with light at a light intensity of [specified] to induce coloring (Ushio Optical Co., Ltd., MultiRide HB-25103BY-C). After coloring, each material was irradiated with visible light at approximately 3,500 lux. Subsequently, the absorbance of each material was measured using a UV-Vis spectrophotometer to measure the fading of the photochromic dye. Fading of the composition of Example 15 was confirmed 20 minutes after visible light irradiation. Fading of the composition of Example 14 was also confirmed 30 minutes after visible light irradiation. From the above, it was confirmed that the fading time can be shortened by adding a light stabilizer.

[0076] V. Contrast Evaluation Images of the colored area after exposure and the unexposed colored area were taken for both the member with a light-reflecting layer (II. (ii)) and the member without a light-reflecting layer (II. (i)). The differential value of the luminance profile at the boundary between the dark colored area and the bright uncolored area was measured as the contrast value. The composition of the photochromic layer in both members was the same as that of Example 14. As shown in Table 5 below, an improvement in the contrast value was confirmed by providing a light-reflecting layer.

[0077]

[0078] As described above, the composition and components of the present invention can be used to test the performance of camera lenses and various devices using light sources, since they are colored by i-lines with a wavelength of 365 nm.

Claims

1. A composition containing, in mass%, 2% or more and 20% or less of a photochromic dye, 3% or more and 15% or less of a resin, and 65% or more and 95% or less of a solvent, wherein the photochromic dye is one or more selected from the materials represented by the following formula (1). (In the formula, X represents a hydrogen atom, a halogen atom, or a linear, branched, or cyclic substituent having 1 to 10 carbon atoms optionally containing one or more nitrogen atoms, sulfur atoms, or oxygen atoms, and Y １ , Y ２ represents a carbon atom or a nitrogen atom, and R 1 , R ２ , R ３ , R ４ represents a hydrogen atom or a linear, branched, or cyclic substituent having 1 to 10 carbon atoms optionally containing one or more nitrogen atoms, sulfur atoms, or oxygen atoms, provided that when R １ and R ２ have a structure in which they are bonded to each other, a cyclic substituent containing R １ and R ２ ; when R ３ and R ４ have a structure in which they are bonded to each other, it represents a cyclic substituent containing R ３ and R ４ .) 2. The composition according to claim 1, wherein the photochromic dye is one or more materials selected from the materials represented by the following formulas (1-a) to (1-d). (Formula (1-a) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2-d-5-phenylthiophene], formula (1-b) is 1,2-bis(2-methylbenzo[b]thiophen-3-yl)hexafluorocyclopenten, formula (1-c) is 4,4'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[5-methyl-2-phenylthiazole], and formula (1-d) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2,4-dimethyl-5-phenylthiophene].) 3. The composition according to claim 1 or 2, wherein the mass ratio of the photochromic dye to the resin is 0.25 or more and 1.35 or less.

4. The composition according to any one of claims 1 to 3, wherein the resin has a transmittance of 80% or more for light with a wavelength of 500 nm.

5. The composition according to any one of claims 1 to 4, wherein the resin is PMMA (polymethyl methacrylate).

6. The composition according to any one of claims 1 to 5, wherein the solvent is PEGMA (polyethylene glycol monomethacrylate).

7. The composition according to any one of claims 1 to 6, wherein the light stabilizer is contained in an amount of 0.1% to 5% by weight of 100% by mass of the composition.

8. The composition according to claim 7, wherein the light stabilizer is a compound containing a tetramethylpiperidine derivative as part of its structure.

9. A component comprising: a substrate; and a photochromic layer provided on the substrate, the photochromic layer comprising a photochromic dye and a resin, wherein the mass ratio of the photochromic dye to the resin in the photochromic layer is 0.25 or more and 1.35 or less, and the photochromic dye is a material represented by the following formula (1). (In the formula, X represents a linear, branched, or cyclic substituent having 1 to 10 carbon atoms, which contains one or more hydrogen atoms, halogen atoms, or optionally nitrogen atoms, sulfur atoms, or oxygen atoms, and Y １ , Y ２ represents a carbon atom or a nitrogen atom, R 1 , R ２ , R ３ , R ４ R represents a linear, branched, or cyclic substituent having 1 to 10 carbon atoms, which contains one or more hydrogen atoms, or optionally one nitrogen atom, one sulfur atom, or one oxygen atom, however R １ and R ２ If they have a structure that connects them to each other, R １ and R ２ A cyclic substituent including R ３ and R ４ If they have a structure that connects them to each other, R ３ and R ４ (Represents a cyclic substituent including .) 10. A component comprising: a substrate; and a photochromic layer provided on the substrate, the photochromic layer comprising a photochromic dye and a resin, wherein the mass ratio of the photochromic dye to the resin in the photochromic layer is 0.25 or more and 1.35 or less, and the photochromic dye is one or more materials selected from the materials represented by the following formulas (1-a) to (1-d). (Formula (1-a) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2-d-5-phenylthiophene], formula (1-b) is 1,2-bis(2-methylbenzo[b]thiophen-3-yl)hexafluorocyclopenten, formula (1-c) is 4,4'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[5-methyl-2-phenylthiazole], and formula (1-d) is 3,3'-(3,3,4,4,5,5-hexafluoro-1-cyclopenten-1,2-diyl)bis[2,4-dimethyl-5-phenylthiophene].) 11. The member according to claim 9 or 10, wherein the resin is PMMA (polymethyl methacrylate).

12. The member according to any one of claims 9 to 11, wherein the member has a light-reflecting layer between the substrate and the photochromic layer, and the light-reflecting layer has a reflectance of 50% or more for light with a wavelength of 500 nm.

13. A component comprising: a substrate; a light-reflecting layer provided on the substrate; and a photochromic layer provided on the light-reflecting layer, wherein the light-reflecting layer has a reflectance of 50% or more for light with a wavelength of 500 nm.

14. The member according to claim 12 or 13, wherein the light-reflecting layer has a reflectance of 95% or less for light with a wavelength of 365 nm.

15. The member according to claim 12 or 13, wherein the light-reflecting layer has a reflectance of 65% or less for light with a wavelength of 365 nm.

16. The member according to any one of claims 12 to 15, wherein the two layers, the photochromic layer and the light-reflecting layer, have a reflectance of 50% or less for light with a wavelength of 365 nm.

17. The member according to any one of claims 12 to 16, wherein the light-reflecting layer includes a metal film, a derivative multilayer film, or a polymer multilayer film.

18. The member according to any one of claims 9 to 17, wherein the thickness of the photochromic layer is 2 μm or less.

19. The member according to any one of claims 9 to 18, wherein the photochromic layer contains a light stabilizer.

20. The member according to claim 19, wherein the light stabilizer is a compound containing a tetramethylpiperidine derivative as part of its structure.

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