Spectacle lens

Abstract

The present disclosure addresses the problem of providing a spectacle lens having a low surface water contact angle and a low dynamic friction coefficient. A spectacle lens according to the present disclosure comprises a spectacle lens base material and a coating film, wherein: the coating film contains a reaction product of polyethyleneimine and polydimethylsiloxane having a reactive group capable of reacting with an amino group; and in the reaction product, the mass ratio of the polyethyleneimine to the polydimethylsiloxane is 6 / 4 to 8 / 2.

Description

Eyeglass lens

[0001] The present disclosure relates to eyeglass lenses.

[0002] Patent Document 1 discloses a hydrophilic polyurethane resin obtained by reacting an organic polyisocyanate, a high-molecular-weight hydrophilic polyol, and a polysiloxane compound having at least one active hydrogen group in the molecule, the resin having a hydrophilic segment and a polysiloxane segment, and having a weight average molecular weight of 3,000 to 800,000.

[0003] Japanese Unexamined Patent Publication No. 2000-063478

[0004] The present disclosure relates to an eyeglass lens including an eyeglass lens base material and a coating film, wherein the coating film contains a reactant of polyethyleneimine and polydimethylsiloxane having a reactive group capable of reacting with an amino group, and in the reactant, a mass ratio of the polyethyleneimine to the polydimethylsiloxane is 6 / 4 to 8 / 2.

[0005] Hereinafter, the present disclosure will be described in detail. The eyeglass lens of the present disclosure has a low water contact angle on a surface thereof and a low dynamic friction coefficient. Such an eyeglass lens is preferable because it is excellent in antifogging property and slipperiness. The description of the constituent requirements described below may be made based on typical embodiments of the present disclosure, but the present disclosure is not limited to such embodiments.

[0006] In the present specification, a numerical range represented by using "to" means a range including the numerical values described before and after "to" as a lower limit value and an upper limit value. Further, in the present specification, when two or more types of a certain component are present, the "content" of the component means the total content of the two or more types of the component. In the present specification, in stepwise described numerical ranges, an upper limit value or a lower limit value described in a certain numerical range may be replaced with an upper limit value or a lower limit value of a numerical range described in another stepwise description. Further, in the numerical ranges described in the present specification, an upper limit value or a lower limit value described in a certain numerical range may be replaced with a value shown in examples. In the present specification, a combination of two or more preferred embodiments is a more preferred embodiment.

[0007] In this specification, "solids" of a composition means the components that form the layer formed using the composition, and if the composition contains a solvent (e.g., organic solvent and water), it means all components excluding the solvent. Furthermore, liquid components that form the layer formed using the composition are also considered to be solids.

[0008] [Eyeglass Lens] The eyeglass lens of this disclosure includes an eyeglass lens substrate and a coating.

[0009] [Coating] The coating included in the eyeglass lens of this disclosure contains a reaction product of polyethyleneimine and polydimethylsiloxane having a reactive group that can react with an amino group (hereinafter also referred to as the "specific reaction product").

[0010] <Specific Reactant> The specific reactant is a reaction product of polyethyleneimine and polydimethylsiloxane having a reactive group that can react with an amino group. In other words, the specific reactant has both a polyethyleneimine structure and a polydimethylsiloxane structure.

[0011] The polyethyleneimine described above typically contains an amino group. The amino group contained in the polyethyleneimine may be a primary amino group, a secondary amino group, or a tertiary amino group. In particular, the polyethyleneimine preferably contains at least one selected from the group consisting of primary and secondary amino groups, and more preferably contains at least one selected from the group consisting of primary and secondary amino groups and a tertiary amino group. The polyethyleneimine may be linear or branched, and a branched shape is preferred because it allows for a higher water contact angle of the coating. Branched polyethyleneimine typically contains a primary amino group, a secondary amino group, or a tertiary amino group.

[0012] The number-average molecular weight of the polyethyleneimine is preferably 300 to 70,000, more preferably 1,000 to 10,000, and even more preferably 1,000 to 5,000. The number-average molecular weight is usually measured by the boiling point elevation method. When using commercially available polyethyleneimine, the catalog value may be used. The viscosity of the polyethyleneimine at 25°C is preferably 200 to 150,000 mPa·s, and more preferably 3,500 to 40,000 mPa·s.

[0013] The polydimethylsiloxane described above has a reactive group that can react with an amino group. This allows the polydimethylsiloxane to react with the polyethyleneimine to form a specific reaction product, thereby forming a uniform coating film. Examples of the reactive group include an epoxy group, an isocyanate group, an isothiocyanate group, an aldehyde group, and a carbodiimide group, with the epoxy group being preferred from the viewpoint of reactivity. The number of reactive groups in the polydimethylsiloxane is one or more, preferably 1 to 6, more preferably 1 to 3, and even more preferably 1. The reactive group may be directly bonded to the silicon atoms constituting the polydimethylsiloxane skeleton, or it may be bonded via a linking group. The polydimethylsiloxane may also have a functional group different from the reactive group that can react with the amino group (for example, a hydroxyl group).

[0014] The polydimethylsiloxane described above may be in either a linear or branched chain form, but a linear form is preferred due to its superior film-forming properties. The number-average molecular weight of the polydimethylsiloxane is preferably 500 to 50,000, more preferably 1,000 to 20,000, and even more preferably 1,000 to 10,000. The number-average molecular weight is usually measured by GPC (Gel Permeation Chromatography). When using commercially available polydimethylsiloxane, catalog values ​​may be adopted.

[0015] The specific reactant is obtained by reacting the polyethyleneimine with the polydimethylsiloxane. The method of reaction can be appropriately selected depending on the type of reactive group present in the polydimethylsiloxane, but for example, one method is to mix the polyethyleneimine and the polydimethylsiloxane and react them. The above reaction is preferably carried out in the presence of a solvent. More specifically, a method is preferred in which a polyethyleneimine solution containing polyethyleneimine and a solvent is mixed with a polydimethylsiloxane solution containing polydimethylsiloxane and a solvent and reacted.

[0016] The solvent is not particularly limited as long as it can dissolve or disperse the polyethyleneimine and the polydimethylsiloxane, and examples include water and organic solvents. Examples of organic solvents include alcohol-based solvents, ketone-based solvents, ether-based solvents, ester-based solvents, hydrocarbon-based solvents, halogenated hydrocarbon-based solvents, amide-based solvents, sulfone-based solvents, and sulfoxide-based solvents, with alcohol-based solvents being preferred. Furthermore, if the reactive group of polydimethylsiloxane is an isocyanate group or a thioisocyanate group, the solvent is preferably one that does not contain active hydrogen. Examples of alcohol-based solvents include methanol, ethanol, isopropanol, n-butanol, t-butanol, isobutyl alcohol, pentanol, hexanol, propylene glycol, ethylene glycol, diethylene glycol, 2-methyl-1,3-propanediol, 1,3-propanediol, 2,2-dimethyl-1,3-propanediol, and 1,4-butanediol, with ethanol or isopropanol being preferred.

[0017] In the above reaction, a known catalyst may be used as needed. It is also preferable to carry out the above reaction while heating.

[0018] In the specified reactant, the mass ratio of polyethyleneimine to polydimethylsiloxane (= mass of polyethyleneimine / mass of polydimethylsiloxane) is 6 / 4 to 8 / 2. By including the specified reactant that satisfies the above requirements in the coating, the coating can achieve both a large water contact angle and a small coefficient of dynamic friction. The above mass ratio in the specified reactant is, in other words, the mass ratio of the amounts used to obtain the specified reactant. For example, a mass ratio of polyethyleneimine to polydimethylsiloxane of 7 / 3 in the specified reactant means that the specified reactant is obtained by mixing and reacting 3 parts by mass of polydimethylsiloxane and 7 parts by mass of polyethyleneimine. Polyethyleneimine and polydimethylsiloxane may each be used individually or in combination of two or more. When two or more are used in combination, the above mass is the total mass of the two or more components.

[0019] The specific reactant may be a reaction product of polyethyleneimine, polydimethylsiloxane, and another reactive compound different from polyethyleneimine and polydimethylsiloxane. Examples of other reactive compounds include compounds that have a reactive group that can react with an amino group and that do not have a polydimethylsiloxane skeleton. Details of the reactive group that can react with an amino group are as described above.

[0020] In the specific reactant, the total amount of polyethyleneimine and polydimethylsiloxane used relative to the total amount of all compounds reacted to obtain the specific reactant is preferably 90% by mass or more, more preferably 97% by mass or more, even more preferably 99% by mass or more, and particularly preferably 100% by mass. That is, it is particularly preferable that the specific reactant is a reactant consisting only of polydimethylsiloxane and polyethyleneimine.

[0021] The coating may contain components other than the specified reactants. Examples of other components include silane coupling agents, antioxidants, rust inhibitors, ultraviolet absorbers, light stabilizers, fungicides, antibacterial agents, antifungal agents, deodorants, pigments, flame retardants, and antistatic agents. From the viewpoint of the curability of the coating, the content of the specified reactants in the coating is preferably 80% by mass, more preferably 90% by mass or more, even more preferably 95% by mass or more, and particularly preferably 97% by mass or more, based on the total mass of the coating. The upper limit is 100% by mass.

[0022] The thickness of the coating is preferably 1 to 1000 nm, as this provides superior effects compared to the present disclosure.

[0023] The spectacle lens of this disclosure preferably has a coating on its outermost surface. The spectacle lens of this disclosure may have a coating on only one side of the spectacle lens substrate, or it may have a coating on both sides.

[0024] <Method for Manufacturing a Coating> A preferred method for manufacturing a coating is to apply a coating-forming composition onto a desired member to form a coating film, and then cure the coating film. More preferably, the method for manufacturing a coating includes the steps of applying a coating-forming composition containing a solvent onto a member to form a coating film, and removing the solvent to cure the coating film, from the viewpoint of uniformity of the formed film.

[0025] Methods for applying the film-forming composition include, for example, dipping coating, spin coating, spray coating, inkjet coating, and flow coating.

[0026] Methods for removing the solvent and curing the coating include drying and heating. The curing temperature is preferably 25 to 90°C, and more preferably 40 to 80°C. The curing time is preferably 0.2 to 2 hours, and more preferably 0.5 to 1 hour.

[0027] It is preferable to apply a surface treatment to the surface of the layer forming the coating (preferably the surface of the anti-reflective layer described later) in order to ensure that the coating adheres more firmly to the adherend and that the abrasion resistance is superior. Examples of surface treatments include silane coupling agent treatment, surface activation treatment, and cleaning treatment. More specifically, silane coupling agent treatment can be performed by bringing a silane coupling agent into contact with the surface to be treated. The silane coupling agent preferably has a reactive group that can react with an amino group. By forming a coating on a surface treated with a silane coupling agent having a reactive group that can react with an amino group, the amino group in the specific reactant reacts with the reactive group of the silane coupling agent, improving the adhesion between the coating and the adherend. Details of the reactive group that can react with an amino group are as described above, and from the viewpoint of reactivity, an epoxy group is preferred. More specifically, examples of surface activation treatments and cleaning treatments include plasma treatment, corona treatment, ozone treatment, and UV treatment, with plasma treatment being preferred. Two or more of the above surface treatments may be combined. For example, plasma treatment may be performed followed by silane coupling agent treatment.

[0028] (Film-forming composition) The film-forming composition preferably contains specific reactants. Details of the specific reactants are as described above. The content of the specific reactants is preferably 80% by mass, more preferably 90% by mass or more, even more preferably 95% by mass or more, and particularly preferably 97% by mass or more, based on the total solid content of the film-forming composition. The upper limit is 100% by mass.

[0029] The film-forming composition preferably contains a solvent. Examples of solvents include those exemplified above as solvents that can be used in the production of the specific reaction products. The solvent may be used alone or in combination of two or more. The solvent content is preferably 7 to 99 parts by mass, and more preferably 9 to 60 parts by mass, per 1 part by mass of the total solid content of the film-forming composition.

[0030] The film-forming composition may contain components other than the specific reactants and solvent. Examples of other components include those listed above as other components that may be included in the film.

[0031] The film-forming composition can be manufactured by known methods. For example, one method involves mixing a polyethyleneimine solution, which is obtained by mixing polyethyleneimine with a solvent, with a polydimethylsiloxane solution, which is obtained by mixing polydimethylsiloxane with a solvent, and reacting the mixture to obtain a composition containing specific reactants and a solvent, and then further mixing in optional components as needed. Another method involves mixing specific reactants, a solvent, and optional components as needed. The various components that may be included in the above-mentioned composition may be mixed all at once, or they may be mixed in stages in separate parts.

[0032] [Eyeglass Lens Substrate] Materials constituting the eyeglass lens substrate included in the eyeglass lenses of this disclosure include organic materials and inorganic materials, with organic materials being preferred. Examples of organic materials include acrylic acid ester resin, methacrylic acid ester resin, thiourethane resin, allyl resin, episulfide resin, polycarbonate, urethane resin, polyester, polystyrene, polyethersulfone, poly-4-methylpentene-1, and diethylene glycol bisallyl carbonate resin (CR-39), with thiourethane resin, episulfide resin, or diethylene glycol bisallyl carbonate resin being preferred.

[0033] Thiourethane resin is a resin obtained by polymerizing a polyisocyanate compound and a polythiol compound. Preferred polyisocyanate compounds include m-xylylene diisocyanate, a mixture of 2,5-bis(isocyanatomethyl)-bicyclo[2,2,1]heptane and 2,6-bis(isocyanatomethyl)-bicyclo[2,2,1]-heptane, isophorone diisocyanate, hexamethylene diisocyanate, or tolylene diisocyanate. Preferred polythiol compounds include pentaerythritol tetrakis(3-mercaptopropionate), 1,2-bis[(2-mercaptoethyl)thio]-3-mercaptopropane, or a mixture of 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane. The episulfide resin is a resin obtained by ring-opening polymerization of a monomer having an episulfide group (epithio group), or a mixed monomer containing such monomer. Preferred monomers having an episulfide group are bis(2,3-epithiopropyl)sulfide or bis(2,3-epithiopropyl)disulfide.

[0034] Examples of spectacle lens substrates include finished lenses in which the convex and concave surfaces are optically finished and molded to the desired prescription, semi-finished lenses in which only the convex surface is finished as an optical surface (e.g., spherical, rotationally symmetric aspherical, and progressive surfaces), and semi-finished lenses in which the concave surface is processed and polished according to the wearer's prescription.

[0035] The thickness of the spectacle lens base material is preferably 0.8 to 30.0 mm, and more preferably 1.0 to 10.0 mm, from the standpoint of ease of handling. The refractive index of the spectacle lens base material is preferably 1.50 or higher, more preferably 1.60 to 1.80, and even more preferably 1.60 to 1.74.

[0036] The spectacle lenses of this disclosure may include layers other than the spectacle lens substrate and coating. Preferably, the spectacle lens has at least one layer selected from the group consisting of a primer layer, a hard coat layer, and an anti-reflective layer between the spectacle lens substrate and the coating. Furthermore, it is preferable that the spectacle lens has an anti-reflective layer, more preferably the spectacle lens substrate, anti-reflective layer, and coating are in this order, and even more preferably the spectacle lens substrate, primer layer, hard coat layer, anti-reflective layer, and coating are in this order. The spectacle lens may have the anti-reflective layer and coating on one surface of the spectacle lens substrate, or the anti-reflective layer and coating may be on both sides of the substrate. Preferably, the anti-reflective layer is arranged adjacent to the coating. In other words, it is preferable that the spectacle lens has the spectacle lens substrate, anti-reflective layer, and coating arranged adjacent to the anti-reflective layer in this order.

[0037] [Anti-reflective layer] Eyeglass lenses preferably have an anti-reflective layer. The anti-reflective layer may be a single-layer or multi-layer structure. An inorganic anti-reflective layer is preferred as the anti-reflective layer. An inorganic anti-reflective layer means an anti-reflective layer composed of an inorganic compound. A multi-layer anti-reflective layer may have a structure in which low refractive index layers and high refractive index layers are alternately stacked. Examples of materials constituting the high refractive index layer include oxides of metals selected from titanium, zirconium, aluminum, niobium, tantalum, and lanthanum. Examples of materials constituting the low refractive index layer include silicon oxide.

[0038] Methods for forming an anti-reflective layer include, for example, vacuum deposition, sputtering, ion plating, ion beam-assisted deposition, and dry methods such as CVD.

[0039] The thickness of the anti-reflective layer is preferably 100 to 10,000 nm, and more preferably 300 to 700 nm.

[0040] [Primer Layer] An eyeglass lens may have a primer layer. The primer layer is preferably disposed between the eyeglass lens substrate and a hard coat layer described below. In this case, the adhesion between the eyeglass lens substrate and the hard coat layer is easily improved, and the impact resistance of the eyeglass lens can be enhanced.

[0041] The primer layer preferably contains a resin. The resin may be in particulate form. Examples of the resin include urethane resins, epoxy resins, phenol resins, polyimides, polyesters, bismaleimide resins, and polyolefins, with urethane resins being preferred. The primer layer may contain additives such as a surfactant.

[0042] Examples of the method for forming the primer layer include a method in which a primer layer-forming composition containing a resin is applied onto a desired member to form a coating film, and the coating film is optionally subjected to a curing treatment (for example, a drying treatment) to form the primer layer. In other words, the primer layer is preferably a layer obtained by applying the primer layer-forming composition onto a desired member to form a coating film, and then curing the coating film. Examples of the method for applying the primer layer-forming composition include the method for applying the film-forming composition described above.

[0043] The thickness of the primer layer is preferably 0.3 to 2.0 μm.

[0044] [Hard Coat Layer] An eyeglass lens may have a hard coat layer. The hard coat layer is preferably disposed on the primer layer, and more preferably disposed between the primer layer and an antireflection layer. When the eyeglass lens has the hard coat layer, the scratch resistance of the eyeglass lens can be improved. The hard coat layer preferably exhibits a hardness of H or higher in pencil hardness in accordance with JIS K5600.

[0045] As the hard coat layer, any known hard coat layer can be used. Examples thereof include organic hard coat layers, inorganic hard coat layers, and organic-inorganic hybrid hard coat layers. For example, in the field of eyeglass lenses, organic-inorganic hybrid hard coat layers are commonly used.

[0046] Examples of the method for forming a hard coat layer include a method in which a hard coat layer-forming composition is applied onto a desired member to form a coating film, and the coating film is optionally subjected to a curing treatment (e.g., light irradiation treatment and drying treatment) to form the hard coat layer. In other words, the hard coat layer is preferably a layer obtained by applying the hard coat layer-forming composition onto a desired member to form a coating film, and then curing the coating film. Examples of the method for applying the hard coat layer-forming composition onto a substrate include the above-mentioned method for applying the film-forming composition.

[0047] The thickness of the hard coat layer is preferably 1 to 20 µm, more preferably 2 to 18 µm.

[0048] [Method for manufacturing eyeglass lens] Any known manufacturing method can be used as the method for manufacturing an eyeglass lens. Specifically, for example, a method including a step of forming a coating film on at least one surface side of an eyeglass lens substrate is mentioned. Above all, the method for manufacturing an eyeglass lens preferably includes a step of forming an antireflection layer on at least one surface side of an eyeglass lens substrate, and a step of forming a coating film on the antireflection layer. The method for forming each layer is as described above.

[0049] The coating included in the spectacle lens of this disclosure can be applied to substrates other than the spectacle lens substrate. An example of an application of a laminate with the above coating applied to another substrate is its use as a front panel (window film) in a flexible display device. The flexible display device preferably consists of a flexible display device laminate and an organic electroluminescent display panel, with the flexible display device laminate positioned on the viewing side of the organic electroluminescent display panel and configured to be bendable. The flexible display device laminate may further include a polarizing plate (preferably a circular polarizing plate) and a touch sensor. In the flexible display device laminate, it is preferable that the laminate (window film), polarizing plate, and touch sensor are laminated in that order from the viewing side, and also preferable that the laminate (window film), touch sensor, and polarizing plate are laminated in that order from the viewing side. Having a polarizing plate on the viewing side of the touch sensor is preferable because it makes the pattern of the touch sensor harder to see, improving the visibility of the displayed image. Each component can be laminated using adhesives and other adhesives.

[0050] The present disclosure will be described in more detail below with reference to examples, but the present disclosure is not limited in any way by these examples.

[0051] The raw materials used in the preparation of the compositions of the examples and comparative examples are described below. • Polyethyleneimine: Manufactured by TCI, viscosity (25°C) 8,500–15,000 mPa·s, number average molecular weight approximately 1,800. • Polydimethylsiloxane: Manufactured by Merck, polydimethylsiloxane, monoglycidyl ether terminator, number average molecular weight approximately 5,000.

[0052] [Preparation of coating-forming compositions] Coating solution 1 was prepared by dissolving polyethyleneimine (0.2 parts by mass) in ethanol (10.0 parts by mass). Coating solution 2 was prepared by dissolving polydimethylsiloxane (0.2 parts by mass) in ethanol (10.0 parts by mass).

[0053] <Composition 1> Coating solution 1 and coating solution 2 were mixed in a mass ratio of coating solution 1 / coating solution 2 = 6 / 4, and heated in a 50°C constant temperature bath for 60 minutes to react polyethyleneimine with polydimethylsiloxane, thereby obtaining composition 1 containing the reaction product of polyethyleneimine and polydimethylsiloxane.

[0054] <Compositions 2-7> Compositions 2-7 were obtained using the same procedure as for Composition 1, except that the mixing ratio of coating solution 1 and coating solution 2 was changed as shown in Table 1 below.

[0055] The mass ratio of the mixed amounts of coating solution 1 and coating solution 2 (coating solution 1 / coating solution 2 (mass ratio)) is approximately equal to the mass ratio of polyethyleneimine to polydimethylsiloxane in the reactant (polyethyleneimine / polydimethylsiloxane (mass ratio)). For example, composition 1 contains a reactant with a mass ratio of polyethyleneimine to polydimethylsiloxane (polyethyleneimine / polydimethylsiloxane) = 6 / 4. Composition 5 contains polyethyleneimine but no reactant, and composition 7 contains polydimethylsiloxane but no reactant.

[0056]

[0057] [Manufacturing of Eyeglass Lenses] <Eyeglass Lens 1> An anti-reflective lens (a lens with the same structure as the product name ECC (manufactured by Nikon-Essilor) but without the top coat layer, having an eyeglass lens base, primer layer, hard coat layer, and anti-reflective layer in that order. The top coat layer is not formed from the beginning) was prepared as the eyeglass lens base material, and the anti-reflective layer was cleaned with a plasma dry cleaner (Yamato Scientific Co., Ltd. PDC210, 400W, processing time 120 seconds). The obtained composition 1 was coated onto the cleaned anti-reflective layer (convex surface) by spin coating (500 rpm for 30 seconds, followed by 2000 rpm for 1 second) to form a coating film of composition 1. Subsequently, the lens with the coating film of composition 1 was heated and cured in an 80°C constant temperature bath for 60 minutes to form a film. Furthermore, the lens surface was wiped with a Kimwipe soaked in ethanol to remove excess composition and obtain eyeglass lens 1.

[0058] <Eyeglass Lenses 2-7> Eyeglass lenses 2-7 were manufactured using the same procedure as eyeglass lens 1, except that the composition used was changed to the composition listed in Table 2 below.

[0059] [Evaluation] <Water Contact Angle> The water contact angle of the central part of the lens convex surface (with a coating of the composition) was measured using a contact angle meter (DM500) manufactured by Kyowa Interface Chemical Co., Ltd. Measurements were taken at room temperature (25°C).

[0060] <Dynamic friction coefficient μk> The dynamic friction coefficient μk was measured when a convex lens surface (with a coating of the composition) was wiped with an eyeglass cloth (Pearl Co., Ltd., product name "Dot Clean") using a constant load measurement with a Tribogear (surface properties measuring instrument TYPE: 38) manufactured by Shinto Kagaku Co., Ltd. The measurement conditions were: load: 200 g, travel distance: 20 mm, travel speed: 400 mm / min. The measurement was performed at room temperature (25°C).

[0061] [Results] Table 2 below shows the configuration and evaluation results of the spectacle lenses for each example and comparative example. "<10°" in the water contact angle column indicates that the water contact angle obtained by the above measurement was less than 10°.

[0062]

[0063] The evaluation results confirmed that the spectacle lenses of this disclosure have a small surface water contact angle and a small coefficient of dynamic friction μk.

Claims

1. An eyeglass lens comprising an eyeglass lens substrate and a coating, wherein the coating comprises a reaction product of polyethyleneimine and polydimethylsiloxane having a reactive group capable of reacting with an amino group, and in the reaction product, the mass ratio of polyethyleneimine to polydimethylsiloxane is 6 / 4 to 8 / 2.

2. The spectacle lens according to claim 1, wherein the reactive group is an epoxy group, an isocyanate group, an isothiocyanate group, an aldehyde group, or a carbodiimide group.

3. The spectacle lens according to claim 1 or 2, further comprising at least one layer selected from the group consisting of a primer layer, a hard coat layer, and an anti-reflective layer between the spectacle lens substrate and the coating.

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