JP2008073981A - Optical article made of polycarbonate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical article made of polycarbonate of good quality. <P>SOLUTION: A polycarbonate lens comprises a single organic layer or two organic antireflection layers. By this constitution, a difference in the coefficient of linear expansion between a polycarbonate lens base material and the single organic layer or two organic antireflection layers becomes small and the heat resistance of the polycarbonate lens is enhanced. Accordingly, even if the polycarbonate lens is heated to a high temperature, trouble such as a crack or the like is not caused in these layers and the good quality of the optical article can be kept. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a polycarbonate optical article having an antireflection layer.

  Conventionally, polycarbonate resin equipment is generally used as a general-purpose base material such as a spectacle lens. Also, there is a polycarbonate optical article in which an antireflection film is provided on a substrate made of such a polycarbonate resin (see, for example, Patent Document 1).

The one described in Patent Document 1 is a polycarbonate optical article having an antireflection layer in which a two-layer antireflection layer is formed by vapor deposition on a substrate made of a polycarbonate resin. In this polycarbonate optical article, a Ni underlayer is formed on the substrate by vapor deposition, Al ₂ O ₃ as the first antireflection layer is vapor deposited thereon, and the antireflection layer first layer is further deposited thereon. A configuration is adopted in which two layers of TiO ₂ are formed by vapor deposition.

JP-A-4-242701 (refer to pages 3 to 4 and FIG. 1)

  By the way, in the polycarbonate optical article having the conventional antireflection layer as described in Patent Document 1, since the antireflection layer is formed of an inorganic substance, the linear expansion coefficient with the polycarbonate substrate which is an organic substance is increased. As a result, the heat resistance deteriorates and the antireflection layer cracks due to the difference in thermal expansion.

  In view of the above problems, an object of the present invention is to provide a good quality optical article made of polycarbonate.

The polycarbonate optical article of the present invention comprises a polycarbonate base material made of a polycarbonate resin and an organic layer provided on the base material and made of a single layer having a refractive index of 1.35 to 1.45. Features.
The base material made of polycarbonate resin described in the present invention refers to a base material having transparency and a refractive index of 1.59.
According to this invention, the optical article made of polycarbonate has a refractive index difference of 0.14 to 0.24 on the base material (polycarbonate base material) made of polycarbonate resin having a refractive index of 1.59. By providing an organic layer consisting of a single layer, a good antireflection function can be imparted. Furthermore, the difference in the linear expansion coefficient between the polycarbonate base material which is an organic layer and the organic layer can be reduced. Therefore, the heat resistance of the polycarbonate optical article can be improved, and inconveniences such as cracking of the organic layer due to thermal expansion can be prevented. Therefore, the quality of the polycarbonate optical article can be improved.

The polycarbonate optical article of the present invention is characterized in that the organic layer composed of the single layer is formed of a coating composition containing silica-based fine particles and an organosilicon compound.
According to this invention, it is possible to form a thin film that has a low refractive index layer of 1.35 to 1.45 and a small difference in linear expansion coefficient from that of the polycarbonate substrate.

The polycarbonate optical article of the present invention is provided with a base material made of a polycarbonate resin, a first layer having a refractive index of 1.7 to 1.9, and a refractive index of 1.35 to 1 while being provided on the base material. And an organic antireflection layer composed of two layers in which the second layer of .45 is laminated in order from the substrate side toward the atmosphere side.
According to the present invention, the antireflection layer includes the first layer on the side close to the polycarbonate substrate and the second layer on the side separated from the polycarbonate substrate, and the first layer is higher than the polycarbonate substrate. The second layer is formed of a material having a refractive index lower than that of the first antireflection layer. Thereby, by providing the first layer having a higher refractive index than that of the low refractive index polycarbonate base material (refractive index 1.59) on the side close to the polycarbonate base material, the difference in refractive index from the second layer is large. Thus, sufficient antireflection characteristics can be obtained. Moreover, it is possible to improve heat resistance by making the organic antireflection layer into two layers instead of a single layer, and giving the first layer of the two layers the property of mitigating deformation due to thermal expansion. .
Here, the refractive index of the first layer is 1.7 to 1.9, and the refractive index of the second layer is 1.35 to 1.45. The difference in refractive index from the antireflection layer is 0.1 to 0.7. Thereby, the antireflection effect is further improved.

In the present invention, the first layer is formed from a coating composition containing metal oxide fine particles containing titanium oxide and an organosilicon compound, and the second layer is composed of silica-based fine particles, an organosilicon compound, and It is preferable that it is formed from the coating composition containing this.
Here, the organosilicon compound is, for example, a silane coupling agent represented by the following formula (1), coated on a base material in a hydrolyzed state by an appropriate method, and heated and cured. A transparent and strong binder resin layer is easily formed.
R ¹ R ² SiX ¹ _3-n (1)
(In the formula, R ¹ is an organic group having a polymerizable reactive group, R ² is a hydrocarbon group having 1 to 6 carbon atoms, X ¹ is a hydrolytic group, and n is 0 or 1. .)
According to this invention, the metal oxide fine particles containing titanium oxide are dispersed in the binder resin, and a high refractive index can be formed.
Moreover, it is preferable to use metal oxide fine particles containing titanium oxide having a rutile-type crystal structure as the titanium oxide. Metal oxide particles containing titanium oxide having a rutile-type crystal structure have excellent light resistance and a higher refractive index than anatase-type titanium oxide, so the amount used in the high refractive index layer is reduced. It is possible to increase the amount of the resin component that contributes to adhesion.
The first layer may be formed from a coating composition containing an organic titanium compound.
Here, the organic titanium compound is, for example, a titanium-based coupling agent, which is coated on a base material in a hydrolyzed state by an appropriate method, and is cured by heating to be transparent and strong including titanium oxide particles. A binder resin layer is formed. Therefore, according to the present invention, it is possible to form a high refractive index layer with only an organic titanium compound without preparing metal oxide particles containing titanium oxide, which is convenient.

Moreover, the organosilicon compound contained in the coating composition of a 2nd layer may use the same thing as the organosilicon compound (Formula (1)) used in order to comprise an above described high refractive index layer.
Further, as the organosilicon compound, a fluorine-containing compound as shown in the following formula (2) may be used.
^{_{X 2 m R 3 3-m}} Si-Y-SiR 3 3-m X 2 m ... (2)
(Wherein R ³ is a monovalent hydrocarbon group having 1 to 6 carbon atoms, Y is a divalent organic group containing one or more fluorine atoms, X ² is a hydrolyzable group, and m is an integer of 1 to 3). .)
According to this invention, since the silica-based fine particles having internal cavities are uniformly dispersed in a transparent and strong layer formed from an organosilicon compound, a low refractive index layer having a sufficiently low refractive index can be formed. . Further, when a fluorine-containing compound such as the above formula (2) is used, the low refractive index of the low refractive index layer can be further easily reduced due to the low refractive index inherent to the fluororesin. In addition, you may mix and use the compound of above-mentioned formula (1), and the compound of Formula (2).

In the polycarbonate optical article of the present invention, the polycarbonate substrate is provided with a hard coat layer on the surface via a primer layer, and the organic antireflection layer is separated from the polycarbonate substrate of the hard coat layer. It is preferable to be provided on the surface.
According to this invention, the surface of the polycarbonate substrate can be protected by the hard coat layer.
In addition, when dyeing such a polycarbonate optical article, it is generally difficult to dye the polycarbonate base material. Therefore, dyeing the hard coat layer can be cited as one method. For coloring, for example, it is necessary to dye using a dyeing agent dispersed in warm water of about 90 to 100 ° C. or higher. Here, in a polycarbonate optical article having a conventional inorganic antireflection layer formed, a crack or the like is generated in the inorganic antireflection layer at about 90 ° C. or less, so that a hard coat layer is formed on the polycarbonate substrate. After being provided, it is necessary to color it and then to provide an inorganic antireflection layer, and it becomes impossible to dye a polycarbonate optical article on which an inorganic antireflection layer has already been formed at a high temperature. Therefore, inventory management becomes complicated, for example, inventory of polycarbonate optical articles of a plurality of colors.
On the other hand, the organic antireflection layer of the present invention can be easily and satisfactorily dyed the hard coat layer without being damaged by the heat during dyeing. Therefore, for example, it is possible to stock a plurality of polycarbonate base materials on which an organic antireflection layer is formed, and if necessary, it is possible to dye the optical article made of polycarbonate in a desired color, so that inventory management can be performed well. .

  Hereinafter, an optical article made of polycarbonate according to an embodiment of the present invention will be described in detail. In addition, although the lens for spectacles is illustrated as an optical article made from polycarbonate of this Embodiment, it is not limited to this, For example, other lenses, such as a lens for cameras, and parts used for other uses, such as model parts It may be.

  The polycarbonate lens of the present embodiment is composed of a polycarbonate lens base and a single organic layer or two organic antireflection layers, but a primer layer formed on the surface of the polycarbonate lens base, As a configuration having a hard coat layer formed on the upper surface of the primer layer, a single organic layer formed on the upper surface of the hard coat layer or an organic antireflection layer composed of two layers, and an antifouling layer, etc. Also good. Hereinafter, each of these layers will be described.

[1. (Polycarbonate lens substrate)
A polycarbonate lens substrate (hereinafter also referred to as “lens substrate”) is formed of a polycarbonate resin having a refractive index of 1.59.

[2. (Primer layer)
The primer layer is formed on the outermost surface of the lens substrate and is present at the interface between both the lens substrate and the hard coat layer described later, and has the property of exhibiting adhesion to both the lens substrate and the hard coat layer. It plays a role of improving the durability of the entire surface treatment film. Furthermore, it also has the property as an external shock absorbing layer and has the property of improving impact resistance. In addition, by acting as a stress relaxation layer during deformation due to heating or pressurization, it also has the property of improving heat resistance and pressurization resistance.

Such a primer layer is preferably formed using a coating composition containing an organic resin polymer having polarity and metal oxide fine particles containing titanium oxide.

  The organic resin polymer expresses adhesion to both the lens substrate and the hard coat layer. The metal oxide fine particles can act as a filler to improve the crosslinking density of the primer layer, thereby improving water resistance, weather resistance and light resistance. As the organic resin polymer, various resins such as a polyester resin, a polyurethane resin, an epoxy resin, a melamine resin, a polyolefin resin, a urethane acrylate resin, and an epoxy acrylate resin can be used. Among these, a polyester resin can be preferably used from the viewpoint of adhesion to a lens substrate containing a sulfur atom and dispersibility of metal oxide fine particles serving as a filler.

  On the other hand, as the metal oxide fine particles containing titanium oxide, it is preferable to use a composite type containing titanium oxide having a rutile crystal structure from the viewpoint of light resistance. The average particle diameter of the metal oxide fine particles is preferably 1 to 200 nm, more preferably 5 to 30 nm.

  In applying the coating composition (coating solution), the surface of the lens substrate is previously treated with an alkali treatment, acid treatment, surfactant treatment, inorganic or organic for the purpose of improving the adhesion between the lens substrate and the primer film. It is effective to perform peeling / polishing treatment with fine particles and plasma treatment. The coating composition is applied / cured by applying a coating composition by dipping, spin coating, spray coating, roll coating, flow coating, or the like, The primer layer can be formed by heating / drying at a temperature for several hours.

  Moreover, the film thickness of a primer layer is 0.01-50 micrometers, Especially the range of 0.1-30 micrometers is preferable. If the primer layer is too thin, basic performance such as water resistance and impact resistance cannot be realized. Conversely, if the primer layer is too thick, surface smoothness may be impaired, and appearance defects such as optical distortion, white turbidity, and cloudiness may occur. Sometimes. In addition, in order to avoid generation | occurrence | production of an interference fringe, it is preferable to match | combine the refractive index of a primer layer with the refractive index of a lens base material.

[3. Hard coat layer)
The hard coat layer is formed on the primer layer formed on the lens substrate surface. The hard coat layer is preferably formed using a coating composition containing metal oxide fine particles containing titanium oxide and an organosilicon compound represented by the following formula (1).
R ¹ R ² _n SiX ¹ _3-n (1)
(In the formula, R ¹ is an organic group having a polymerizable reactive group, and R ² is a hydrocarbon having 1 to 6 carbon atoms.

A containing group, X ¹ is a hydrolyzable group, n is 0 or 1. )

Titanium oxide preferably has a rutile crystal structure from the viewpoint of weather resistance and light resistance.
The organosilicon compound represented by the formula (1) is a so-called silane coupling agent and serves as a binder resin for the hard coat layer. In the formula (1), R ¹ is an organic group having a polymerizable reactive group, and has 2 or more carbon atoms. R ¹ has a polymerizable reactive group such as vinyl group, allyl group, acrylic group, methacryl group, 1-methylvinyl group, epoxy group, mercapto group, cyano group, isocyano group, amino group and the like. X ¹ is a hydrolyzable functional group, and examples thereof include alkoxy groups such as methoxy group, ethoxy group and methoxyethoxy group, halogen groups such as chloro group and bromo group, and acyloxy groups. R ² represents a monovalent hydrocarbon group having 1 to 6 carbon atoms, specifically, an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, or a cyclohexyl group, a phenyl group, or the like. It can be illustrated. A methyl group is preferred for obtaining good scratch resistance.

  Examples of the organosilicon compound include vinyl trialkoxysilane, vinyltrichlorosilane, vinyltri (β-methoxy-ethoxy) silane, allyltrialkoxysilane, acryloxypropyltrialkoxysilane, methacryloxypropyltrialkoxysilane, and γ-glycid. Examples include xylpropyltrialkoxysilane, β- (3,4-epoxycyclohexyl) -ethyltrialkoxysilane, mercaptopropyltrialkoxysilane, γ-aminopropyltrialkoxysilane, and the like. Two or more of these “B component” organosilicon compounds may be used in combination.

  And when manufacturing the hard-coat liquid for forming a hard-coat layer, it is preferable to mix the sol in which the metal oxide microparticles | fine-particles were disperse | distributed, and an organosilicon compound. The compounding amount of the metal oxide fine particles is determined by the hardness and refractive index of the hard coat layer, and is 5 to 80% by mass, particularly 10 to 60% by mass, based on the solid content in the hard coat liquid. It is preferable. If the blending amount is too small, the wear resistance of the hard coat layer becomes insufficient, and if the blending amount is too large, cracks may occur in the hard coat layer. Moreover, when dyeing | hardening a hard-coat layer, dyeability may fall.

  In addition, it is very useful to contain a polyfunctional epoxy compound in the hard coat layer. The polyfunctional epoxy compound can improve the adhesion of the hard coat layer to the primer layer, and can improve the water resistance of the hard coat layer and the impact resistance as a polycarbonate lens. Examples of the polyfunctional epoxy compound include aliphatic epoxy compounds such as 1,6-hexanediol diglycidyl ether and ethylene glycol diglycidyl ether, isophoronediol diglycidyl ether, and bis-2,2-hydroxycyclohexylpropane diglycidyl ether. And aromatic epoxy compounds such as resorcin diglycidyl ether, bisphenol A diglycidyl ether, and cresol novolac polyglycidyl ether.

  Further, a curing catalyst may be added to the hard coat layer. Examples of the curing catalyst include perchloric acids such as perchloric acid, ammonium perchlorate, and magnesium perchlorate, Cu (II), Zn (II), Co (II), Ni (II), and Be (II). , Ce (III), Ta (III), Ti (III), Mn (III), La (III), Cr (III), V (III), Co (III), Fe (III), Al (III) Acetylacetonate having a central metal atom such as Ce (IV), Zr (IV), V (IV), amino acids such as amine and glycine, Lewis acid, organic acid metal salts and the like.

The coating composition (coating liquid) for forming a hard coat layer thus obtained can be diluted with a solvent and used as necessary. Solvents include alcohols,

Solvents such as esters, ketones, ethers, and aromatics are used. If necessary, light resistance of small amounts of metal chelate compounds, surfactants, antistatic agents, ultraviolet absorbers, antioxidants, disperse dyes, oil-soluble dyes, pigments, photochromic compounds, hindered amines, hindered phenols, etc. A heat stabilizer or the like can be added to improve the coating property, the curing speed, and the coating performance after curing.

In addition, as a coating liquid application / curing method, a coating composition is applied by a dipping method, a spin coating method, a spray coating method, a roll coating method, or a flow coating method, and then at a temperature of 40 to 200 ° C. A hard coat film is formed by heating and drying for a period of time. In addition, it is preferable that the film thickness of a hard-coat layer is 0.05-30 micrometers. If the film thickness is less than 0.05 μm, the basic performance cannot be realized. On the other hand, if the film thickness exceeds 30 μm, the smoothness of the surface may be impaired, or optical distortion may occur. The refractive index of the hard coat layer is preferably matched to the refractive indexes of the lens substrate and the primer layer in order to avoid generation of interference fringes.

[4. Organic layer)
The single-layer organic layer in the present embodiment is suitably formed from a coating agent containing silica-based fine particles, most preferably hollow silica-based fine particles having internal cavities, and an organosilicon compound.
Here, the hollow silica-based fine particles are used because the internal cavity contains a gas or solvent having a refractive index lower than that of silica, so that the refractive index is reduced compared with silica-based fine particles without cavities. This is because a lower refractive index of the refractive index layer is achieved. Silica-based fine particles having internal cavities can be produced by the method described in JP-A-2001-233611, but in the present invention, the average particle diameter is in the range of 1 to 150 nm and the refractive index. Is preferably in the range of 1.16 to 1.39. When the average particle diameter of the particles is less than 1 nm, the void ratio inside the particles becomes small and a desired low refractive index cannot be obtained. On the other hand, when the average particle diameter exceeds 150 nm, the haze of the low refractive index layer increases, which is not preferable. A preferable average particle diameter can be calculated by the following formula.
Average particle size = (design wavelength (nm) / organic layer refractive index) × 1/4
A dispersion sol containing hollow silica-based fine particles having an average particle diameter of 1 to 150 nm and a refractive index of 1.16 to 1.39 is commercially available (for example, manufactured by Catalytic Chemical Industry Co., Ltd., Thruria and Recum).

  Further, the same organic silicon compound as the organic silicon compound represented by the above formula (1) may be used.

Further, as the organosilicon compound, a fluorine-containing compound as shown in the following formula (2) may be used.
^{_{X 2 m R 3 3-m}} Si-Y-SiR 3 3-m X 2 m ... (2)
(Wherein R ³ is a monovalent hydrocarbon group having 1 to 6 carbon atoms, Y is a divalent organic group containing one or more fluorine atoms, X ² is a hydrolyzable group, and m is an integer of 1 to 3). .)
Similarly to the organosilicon compound, the fluorine-containing compound represented by the formula (2) finally functions as a binder resin for the silica-based fine particles in the organic antireflection layer. In addition, when such a fluorine-containing compound is used, it is easier to lower the refractive index of the organic antireflection layer due to the low refractive index inherent in the fluorine-containing compound.
R ³ represents a monovalent hydrocarbon group having 1 to 6 carbon atoms, specifically, an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, or a cyclohexyl group, a phenyl group, or the like. It can be illustrated. A methyl group is preferred for obtaining good scratch resistance. m is an integer of 1 to 3, preferably 2 or 3, and m = 3 is particularly preferable for a highly hard film. X represents a hydrolyzable group. Specific examples thereof include halogen atoms such as Cl, organooxy groups represented by OR _X (R _X is a monovalent hydrocarbon group having 1 to 6 carbon atoms), particularly methoxy group, ethoxy group, propoxy group, isopropoxy group, Examples include alkoxy groups such as butoxy groups, alkenoxy groups such as isopropenoxy groups, acyloxy groups such as acetoxy groups, ketoxime groups such as methylethyl ketoxime groups, and alkoxyalkoxy groups such as methoxyethoxy groups. Among these, an alkoxy group is preferable, and a silane compound having a methoxy group or an ethoxy group is particularly preferable because it is easy to handle and the reaction during hydrolysis is easily controlled.
In the formula (2), the number of fluorine atoms is preferably 4 to 50, particularly preferably 4 to 2.
There are four. In order to develop various functions such as antireflection, antifouling, and water repellency, it is preferable to contain a large amount of fluorine atoms. In some cases, scratch resistance cannot be obtained. Accordingly, Y preferably has the following structure.
_{-CH 2 CH 2 (CF 2)} n CH 2 CH 2 -
_{-C 2 H 4 -CF (CF 3} ) - (CF 2) n -CF (CF 3) -C 2 H 4 -
N in the structural formula is preferably 2 to 20, more preferably 2 to 12, and particularly preferably 4 to 10. If it is less than this, various functions such as antireflection properties, antifouling properties, water repellency, and chemical resistance may not be obtained sufficiently, and if it is too much, the crosslinking density is lowered and sufficient scratch resistance is obtained. May not be obtained.

The coating composition preferably contains an epoxy group-containing organic compound containing one or more epoxy groups in the molecule in order to improve the scratch resistance (abrasion resistance) of the organic layer. Examples of such an epoxy group-containing organic compound include glycidoxymethyltrimethoxysilane, glycidoxymethyltriethoxysilane, α-glycidoxyethyltrimethoxysilane, α-glycidoxyethyltriethoxysilane, β -Glycidoxyethyltriethoxysilane, β-glycidoxypropyltrimethoxysilane, α-glycidoxypropyltrimethoxysilane, α-glycidoxypropyltriethoxysilane, β-glycidoxypropyltriethoxysilane, γ -Glycidoxypropyltrimethoxysilane, (3,4-epoxycyclohexyl) methyltrimethoxysilane, γ-glycidoxypropylvinyldiethoxysilane, γ-glycidoxypropylphenyldiethoxysilane, δ- (3,4 -Epoxycyclohexyl) butyltrie Toxisilane and the like can be mentioned.

  Moreover, you may use together resin, such as a silicone type, an acrylic type, an epoxy type, a urethane type, a melamine type, in the coating composition used for formation of an organic layer. Among these, when considering various properties such as heat resistance, chemical resistance, and scratch resistance as a polycarbonate lens, it is preferable to include a silicone-based resin and an epoxy-based resin. In this case, the surface hardness is improved. In addition, for adjusting the refractive index, it is also possible to add particulate inorganic substances (metal oxide fine particles) and the like. Examples of the particulate inorganic substance to be added include colloidally dispersed sol. From the viewpoint of lowering the refractive index of the low refractive index layer, magnesium fluoride sol, calcium fluoride sol, and the like can be given.

  The coating composition for forming such an organic layer includes a small amount of a curing catalyst (a polymerization catalyst for producing a lens base material), a photopolymerization initiator, an acid generator, a surfactant, a charge as necessary. Addition of light stabilizers such as hindered amines and hindered phenols, disperse dyes, oil-soluble dyes, fluorescent dyes, pigments, etc. to improve the coating properties of the coating composition (coating liquid) In addition, the film performance after polymerization and curing can be improved.

[5. (Organic antireflection layer)
In addition, although the structure which forms the organic layer which consists of a single layer above was shown, it is good also as a structure which provides an organic type antireflection layer. This organic antireflection layer is composed of two organic thin layers formed on the hard coat layer. The two organic thin layers are composed of a high refractive index layer as a first layer located on the lens substrate side and a low refractive index layer as a second layer located on the atmosphere side. That is, the refractive index of the layer located on the lens substrate side is configured to be higher than the refractive index of the layer located on the atmosphere side.
Hereinafter, the high refractive index layer and the low refractive index layer in the present embodiment will be specifically described.

(5-1. High refractive index layer)
The high refractive index layer is preferably formed from a coating composition containing metal oxide fine particles containing titanium oxide and an organosilicon compound.

Here, as the titanium oxide, for example, metal oxide fine particles having an average particle diameter of 1 to 200 nm including a composite oxide having a rutile type crystal structure composed of titanium oxide and tin oxide, or titanium oxide, tin oxide and silicon oxide. (Composite fine particles). By using metal oxide fine particles containing titanium oxide having a rutile-type crystal structure, weather resistance and light resistance are further improved. Moreover, since the metal oxide fine particles containing titanium oxide having a rutile type crystal structure have a higher refractive index than the anatase type, the amount used in the A layer can be reduced, contributing to adhesion. The amount of the resin component can be increased.

  The type and blending amount of the metal oxide fine particles containing titanium oxide are determined by the target hardness, refractive index, etc., but the blending amount is 5% of the solid content in the coating composition for the high refractive index layer. It is desirable to be in the range of ˜80 mass%, particularly 10˜50 mass%. If the amount is too small, the abrasion resistance of the coating film may be insufficient. On the other hand, when there are too many compounding quantities, a crack will arise in a coating film and dyeing | staining property may become inadequate.

  As the organosilicon compound, the organosilicon compound used in the hard coat layer is preferably used.

The high refractive index layer may be formed from a coating composition containing an organic titanium compound.
As the organic titanium compound, for example, a titanium coupling agent represented by the following formula (3) can be preferably used.
(R ⁴ O) _a TiR ⁵ _b R ⁶ _c (3)
(Where a + b + c = 4, a, b and c are integers selected from 0 to ⁴ , R ⁴ , R ⁵ and R ⁶ are hydrogen or a saturated or unsaturated hydrocarbon group, A functional group may be introduced into the hydrogen group.)

As the hydrocarbon group, those having 1 to 10 carbon atoms are preferred, and those having 1 to 6 carbon atoms are more preferred. Particularly preferably, for example, as R ⁴ , isopropoxyl and n-butoxy group can be exemplified, and R ⁵ and R ⁶ are acetonato having a vinyl group, an epoxy group, a methacryl group, an amino group, and a mercapto group, Aminato group can be raised.
More specifically, tetraethoxy titanium, tetraisopropoxy titanium, tetra n-butoxy titanium, isopropoxy titanium triisostearate, isopropoxy titanium dimethacrylate isostearate, isopropoxy titanium tridodecyl benzene sulfonate, isopropoxy titanium tris. Dioctyl phosphate, isopropoxy titanium tri-N-ethylaminoethylaminato, titanium bisdioctyl pyrophosphate oxyacetate, bisdioctyl phosphate ethylene glycolatotitanium, tetraisopropoxy titanium bisdioctyl phosphite, di-n-butoxybistriethanolaminato Examples include titanium. These titanium-based coupling agents may be two or more polycondensates produced by hydrolysis and dehydration condensation of some of the bonds. Two or more types may be used in combination or polycondensed.

(5-2. Low refractive index layer)
The low refractive index layer is preferably formed from a coating agent containing silica-based fine particles having internal cavities described in the organic layer (hereinafter also referred to as “hollow silica-based fine particles”) and an organosilicon compound.

An organic antireflection layer composed of a high refractive index layer and a low refractive index layer is suitably formed as an organic thin layer having a predetermined refractive index on the hard coat layer by a wet method using the coating composition described above. can do.
As a method for forming the organic antireflection layer by a wet method, a known method such as a dipping method, a spinner method, a spray method, or a flow method can be used. Among these forming methods, the dipping method or the spinner method is preferable in consideration of uniformly forming a thin film having a film thickness of 50 to 150 nm in a curved shape such as a polycarbonate lens. In addition, when forming an organic type anti-reflective layer on a hard-coat layer, it is preferable to pre-process on the hard-coat layer surface. As a specific example of this pretreatment, a method of hydrophilizing the hard coat layer surface (contact angle θ = 60 ° or less) by surface polishing, ultraviolet-ozone cleaning, plasma treatment or the like is effective.

  The specific method of forming the organic antireflection layer is basically the same for the high refractive index layer and the low refractive index layer, and is performed by the following procedure. First, the organosilicon compound is diluted with an organic solvent, and then hydrolyzed by adding water, dilute hydrochloric acid, acetic acid or the like as necessary. Further, a system in which metal oxide fine particles or hollow silica fine particles are colloidally dispersed in an organic solvent is added. Thereafter, if necessary, a curing catalyst, a photopolymerization initiator, an acid generator, a surfactant, an ultraviolet absorber, an antioxidant, and the like are added, and after sufficiently stirring, used as a coating composition (coating liquid). In the case of using an organic titanium compound in the high refractive index layer, it is not necessary to add metal oxide fine particles.

  At this time, the concentration of the coating liquid diluted with respect to the solid content after curing is preferably 0.5 to 15% by mass, and more preferably 1 to 10% by mass as the solid content concentration. When the solid content concentration exceeds 15% by mass, it is difficult to obtain a predetermined film thickness even if the pulling speed is reduced by the dipping method or the rotational speed is increased by the spinner method. The thickness will be thicker than necessary. When the solid content concentration is less than 0.5% by mass, the film thickness becomes thinner than necessary even if the pulling speed is increased by the dipping method or the rotational speed is decreased by the spinner method. It is difficult to obtain a predetermined film thickness. Also, if the speed is made too fast or the rotational speed is made too slow, the coating unevenness on the lens tends to increase, and it becomes impossible to cope with the addition of a surfactant or the like.

  After the coating liquid is applied to the lens substrate, it is cured by heat or ultraviolet light and a combination thereof to obtain an organic antireflection layer, but it is preferably cured by heat treatment. The heating temperature in the heat treatment is determined in consideration of the composition of the coating liquid, the heat resistance of the lens substrate, and the like, but is preferably 50 to 200 ° C, more preferably 80 to 140 ° C.

  A preferable value as the refractive index of the organic antireflection layer obtained by the above method is 1.7 to 1.9 as the refractive index of the high refractive index layer, and 1.35 as the refractive index of the low refractive index layer. 1.45. When the difference in refractive index between the two layers is smaller than 0.1, the antireflection effect is lowered. The refractive index difference between both layers is preferably 0.15 or more, more preferably 0.20 or more.

  The thickness of the obtained organic antireflection layer is preferably in the range of 100 to 200 nm for the high refractive index layer and in the range of 100 to 200 nm for the low refractive index layer. If the film thickness is too thick or too thin than this range, a sufficient antireflection effect may not be obtained.

[6. Antifouling layer)
As described above, a polycarbonate lens having a primer layer, a hard coat layer, and an organic antireflection layer formed on a lens base material is further provided with an antireflection layer for the purpose of improving the water and oil repellency of the polycarbonate lens surface. An antifouling layer comprising an organosilicon compound containing fluorine can be formed thereon. As the organosilicon compound containing fluorine, for example, fluorine-containing silane compounds described in JP-A-2005-301208 and JP-A-2006-126782 can be suitably used.
The fluorine-containing silane compound can be applied to the organic antireflection layer by a wet method and a dry method using a water-repellent treatment solution dissolved in an organic solvent and adjusted to a predetermined concentration. As a coating method, a dipping method, a spin coating method, or the like can be used.

Although the film thickness of an antifouling layer is not specifically limited, 0.001-0.5 micrometer is preferable. More preferably, it is 0.001-0.03 micrometer. If the antifouling layer is too thin, the water and oil repellency effect will be poor, and if it is too thick, the surface will be sticky, which is not preferable. On the other hand, if the antifouling layer is thicker than 0.03 μm, the antireflection effect decreases, which is not preferable.

[Operational effects of polycarbonate lens in the present embodiment]
Since the polycarbonate lens of the present embodiment as described above has an organic antireflection layer, the linear expansion coefficient between the polycarbonate lens substrate and the organic antireflection layer is reduced, and heat resistance is improved. Can do. Therefore, even if this polycarbonate lens is left in the vehicle, for example, even if the temperature of the polycarbonate lens becomes high, there is no inconvenience such as cracks in the organic antireflection layer, and good quality can be maintained. it can.

  The organic antireflection layer is formed by a wet method such as a dipping method, a spinner method, a spray method, or a flow method. For this reason, the organic antireflection layer can be easily formed on the lens substrate with a small device, and as a result, the manufacturing cost required for the production of the polycarbonate lens can be reduced.

  Further, a hard coat layer is formed on the lens substrate via a primer layer, and an organic antireflection layer is formed on the hard coat layer. For this reason, the lens substrate surface can be protected by the hard coat layer. Further, the polycarbonate lens can be dyed by dyeing the hard coat layer. Furthermore, even when the polycarbonate lens is overheated at the time of dyeing, since the heat resistance of the organic antireflection layer is good as described above, it is possible to carry out the dyeing process after forming the organic antireflection layer on the lens substrate. it can. Therefore, for example, there is no need to stock a plurality of types of dyed polycarbonate lenses. For example, a necessary number of one type of polycarbonate lenses is stocked, and inventory management such as dyeing polycarbonate lenses according to orders from customers can be performed. Inventory can be managed more efficiently.

  The organic antireflection layer is formed from the lens substrate side by a high refractive index layer having a refractive index of 1.7 to 1.9 and a low refractive index layer having a refractive index of 1.35 to 1.45. Therefore, even when a polycarbonate lens base material having a low refractive index is used, sufficient antireflection characteristics can be obtained as a result. That is, sufficient antireflection characteristics can be obtained even by using an inexpensive polycarbonate lens base material having high versatility.

  The following examples further illustrate the invention, but the invention is not limited thereto.

(1) Polycarbonate lens substrate A commercially available polycarbonate substrate (refractive index: 1.59) was used.

(2) Preparation of primer composition In a stainless steel container, 3700 parts by weight of methyl alcohol, 250 parts by weight of pure water and 1000 parts by weight of propylene glycol monomethyl ether were added and stirred sufficiently, and then titanium oxide, tin oxide and silicon oxide were added. 2800 parts by weight of a composite fine particle sol mainly composed of rutile type crystal structure, methanol dispersion, total solid content concentration 20% by weight, manufactured by Catalyst Kasei Kogyo Co., Ltd., trade name OPTRAIQUE 1120Z (8RU-7 · G)) And mixed with stirring. Next, after adding 2200 parts by weight of a polyester resin and stirring and mixing, 2 parts by weight of a silicone surfactant (product name: L-7604, manufactured by Nippon Unicar Co., Ltd.) was further added and stirring was continued for a whole day and night. Filtration was performed to obtain a primer composition.

(3) Preparation of hard coat composition Into a stainless steel vessel, 1000 parts by weight of butyl cellosolve was added, and 1200 parts by weight of γ-glycidoxypropyltrimethoxysilane was added and stirred sufficiently. 300 parts by weight was added and stirring was continued for a whole day and night to obtain a silane hydrolyzate. After adding 30 parts by weight of a silicone surfactant (trade name L-7001, manufactured by Nippon Unicar Co., Ltd.) to this silane hydrolyzate and stirring for 1 hour, it is mainly composed of titanium oxide, tin oxide and silicon oxide. 7300 parts by weight of a composite fine particle sol (rutile crystal structure, methanol dispersion, manufactured by Catalyst Kasei Kogyo Co., Ltd., trade name OPTRAIQUE 1120Z (8RU-25 · A17)) was added and mixed with stirring for 2 hours. Next, 250 parts by weight of an epoxy resin (manufactured by Nagase Kasei Co., Ltd., trade name EX-313) was added and stirred for 2 hours, then 20 parts by weight of iron (III) acetylacetonate was added and stirred for 1 hour, and a 2 μm filter. Filtration was performed to obtain a hard coat composition.

(4) Preparation of coating composition for low refractive index layer 32.4 parts by weight of methanol was added to 47.8 parts by weight (0.08 mol) of a fluorinated silane compound represented by the following formula, and γ-glycidoxypropyltri 4.7 parts by weight (0.02 mol) of methoxysilane and 36 parts by weight of 0.1 mol / liter hydrochloric acid aqueous solution were added, and this was stirred and mixed to obtain a mixed solution. This mixed solution was stirred in a thermostatic bath at 25 ° C. for 2 hours to obtain a silicone resin having a solid concentration of 10% by mass.
_{(CH 3 O) 3 Si-} C 2 H 4 -C 6 F 12 -C 2 H 4 -Si (OCH 3) 3
This silicone resin and a hollow silica-isopropanol dispersion sol (manufactured by Catalyst Kasei Kogyo Co., Ltd., solid content concentration 20% by mass, average primary particle size 35 nm, outer shell thickness 8 nm) are obtained by the following formula. Then, 935 parts by weight of propylene glycol monomethyl ether was added and diluted to obtain a coating composition for a low refractive index layer having a solid content concentration of 3% by mass.

(5) Preparation of antifouling layer coating composition Fluorine-containing silane compound (made by Shin-Etsu Chemical Co., Ltd., blended with trade names KY-130 and KP-801 to have a solid content ratio of 80/20), perfluoro A coating composition for an antifouling layer having a solid content concentration of 0.3% by mass was prepared by diluting in hexane.

(Example 1)
The polycarbonate lens substrate obtained in (1) was washed. Then, the coating composition for the low refractive index layer prepared in the above (4) is applied on one side by spin coating and baked at 120 ° C. for 20 minutes, and then similarly spin-coated on the remaining one side and baked at 120 ° C. for 10 minutes. did. Then, it heated in the oven maintained at 125 degreeC for 2 hours, and formed the organic type antireflection layer which consists of a low refractive index layer.

(Example 2)
(6) Formation of primer layer, hard coat layer, organic antireflection layer and antifouling layer The polycarbonate lens substrate obtained in (1) was washed. Then, it was immersed in the primer composition prepared in (2) above, dip-coated at a pulling rate of 200 mm / min, and baked at 80 ° C. for 20 minutes to form a primer layer on the surface of the polycarbonate lens substrate. Next, the polycarbonate lens on which the primer layer is formed is immersed in the hard coat composition prepared in the above (3), dip-coated at a pulling rate of 400 mm / min, and baked at 80 ° C. for 30 minutes. A coat layer was formed. Then, it heated for 3 hours in oven maintained at 125 degreeC, and obtained the polycarbonate lens in which the primer layer and the hard-coat layer were formed. The formed primer layer had a thickness of 0.5 μm, and the hard coat layer had a thickness of 2.3 μm.

Next, the polycarbonate lens on which the primer layer and the hard coat layer are formed is subjected to plasma treatment (atmospheric plasma), and then the low refractive index layer coating composition prepared in (4) above is applied to one side by spin coating, and 120 After baking at 20 ° C. for 20 minutes, the remaining one surface was similarly spin-coated and baked at 120 ° C. for 10 minutes. Thereafter, an organic antireflection layer comprising a low refractive index layer is formed by heating in an oven maintained at 125 ° C. for 2 hours, and a polycarbonate lens having a primer layer, a hard coat layer and an organic antireflection layer is formed. Obtained. The formed organic antireflection layer had a low refractive index layer with a refractive index of 1.37 and a film thickness of 100 nm.
Subsequently, the polycarbonate lens on which the primer layer, the hard coat layer and the organic antireflection layer are formed is dipped in the antifouling layer coating composition prepared in the above (5) and dip coated at a lifting speed of 150 mm / min. Baked at 60 ° C. for 10 minutes, and then put into a constant temperature and humidity chamber maintained at 90 ° C. and 90% relative humidity, held for 2 hours, and then heated in an oven maintained at 100 ° C. for 2 hours. A polycarbonate lens having a primer layer, a hard coat layer, an organic antireflection layer and an antifouling layer was obtained.
(Example 3)
In Example 3, (1) to (5) were carried out in the same manner as in Example 2 above, and a polycarbonate lens substrate, a primer composition, a hard coat composition, a coating composition for a low refractive index layer, and an antifouling layer were used. The coating composition was prepared. Furthermore, the coating composition for high refractive index layers was prepared by the following (7).

(7) Preparation of coating composition for high refractive index layer In a stainless steel container, 177.4 parts by weight of propylene glycol monomethyl ether was added, and 2.5 parts by weight of γ-glycidoxypropyltrimethoxysilane was added and stirred sufficiently. Then, 1.2 parts by weight of 0.1 mol / liter hydrochloric acid aqueous solution was added and stirring was continued for a whole day and night to obtain a silane hydrolyzate. To this silane hydrolyzate, 0.1 part by weight of a silicone surfactant (manufactured by Nippon Unicar Co., Ltd., trade name L-7001) was added and stirred for 1 hour, and then titanium oxide, tin oxide and silicon oxide were added. 18.0 parts by weight of a composite fine particle sol (rutile-type crystal structure, methanol dispersion, produced by Catalyst Kasei Kogyo Co., Ltd.) as a main component was added and mixed with stirring for 2 hours. Next, 0.6 parts by weight of epoxy resin (manufactured by Nagase Kasei Co., Ltd., trade name EX-313) was added and stirred for 2 hours, and then 0.1 parts by weight of iron (III) acetylacetonate was added and stirred for 1 hour. Filtration was performed using a 2 μm filter to obtain a coating composition for a high refractive index layer.

  Next, after the polycarbonate lens on which the primer layer and the hard coat layer are formed is subjected to plasma treatment (atmospheric plasma), the coating composition for the high refractive index layer prepared in (7) above is applied on one side by spin coating, and 120 After baking at 20 ° C. for 20 minutes, the remaining one surface was similarly spin-coated and baked at 120 ° C. for 10 minutes. Thereafter, a low refractive index layer is formed as in Example 1, an organic antireflection layer comprising a high refractive index layer and a low refractive index layer is formed, and an antifouling layer is formed as in Example 1. did. The formed organic antireflection layer had a high refractive index layer with a refractive index of 1.80, a film thickness of 150 nm, a low refractive index layer with a refractive index of 1.37, and a film thickness of 100 nm.

(Comparative Example 1)
The operations of (1) to (3) of Example 1 were carried out to prepare a polycarbonate lens substrate, a primer composition, and a hard coat composition, and a primer layer and a hard layer were formed on the polycarbonate lens substrate in the same manner as in Example 1. A coat layer was formed.
Thereafter, an antireflection layer and an antifouling layer made of an inorganic oxide were formed on the upper layer of the hard coat layer by a vacuum deposition machine (CES-21, manufactured by Shincron Co., Ltd.) by the following method. That is, first, the polycarbonate lens substrate on which the primer layer and the hard coat layer were formed was set on a support device, degassed in the chamber CH1, and moved to the chamber CH2. Then, after the high-frequency plasma treatment (argon gas used plasma 0.4 W × 60 sec), in order to the atmosphere from the hard coat layer _side, SiO _{2, ZrO} 2, SiO _2, ZrO 2, 5 layers of SiO ₂ A multilayer antireflection layer composed of The optical thin film of each layer is composed of the first SiO ₂ layer, the next ZrO ₂ and SiO ₂ transmissive film layer, the next ZrO ₂ layer, and the uppermost SiO ₂ layer with a design wavelength λ of 520 nm and λ / 4 was formed.

Subsequently, in the chamber CH2, the surface of the antireflection layer is subjected to plasma treatment (plasma using oxygen gas 0.4 W × 30 seconds), then moved to the chamber CH3, and a halogen lamp is used as a heater. Evaporation was performed by heating at 600 ° C. for 3 minutes to form an antifouling layer. That is, as a vapor deposition source, a fluorine-containing organosilicon compound (manufactured by Shin-Etsu Chemical Co., Ltd., trade name KY-130) is diluted with a fluorine-based solvent (manufactured by Sumitomo 3M Co., trade name Novec HFE-7200) to form a solid. A 3% partial concentration solution was prepared, and 1 g of this was impregnated into a porous ceramic pellet and dried.
Thereafter, the lens was inverted and set again on the support device, and the same treatment was performed again to form an antifouling layer on both surfaces of the lens. Then, the lens was taken out and kept at 60 ° C. and a relative humidity of 60%. It was put into a damp constant temperature and humidity chamber and held for 2 hours.

(Evaluation methods)
The physical properties of the plastic lenses obtained in Examples 1, 2, 3 and Comparative Example 1 were evaluated by the following methods. The results are shown in Table 1.

(1) Reflectance The single-sided reflectance of the lens was measured using a spectrophotometer (U-3500 manufactured by Hitachi, Ltd.), and the average reflectance in the wavelength range of 400 to 700 nm was calculated. 1 to 3 show wavelength-reflectance curves of plastic lenses obtained in Examples 1 and 2 and Comparative Example 1. FIG.

(2) Scratch resistance After applying steel wool # 0000 to the lens surface with a load of 1 kg and rubbing a distance of 3 to 4 cm for 10 reciprocations, the state of scratches that entered the lens surface with the eyes was visually evaluated as A to E below. Evaluation was made on the basis of 5 levels.
A: No scratches B: 1 to 5 scratches are confirmed C: 6 to 20 scratches are confirmed D: There are 21 or more scratches but it is not visible in cloudy E: Many Scratched and almost cloudy.

(3) Initial adhesion The surface of the lens is cross-cut into a base pattern at intervals of about 1 mm, and an adhesive tape (made by Nichiban Co., Ltd., trade name cello tape (registered trademark)) is firmly attached to the cross-cut portion. After attaching, the adhesive tape was peeled off rapidly, and the state of film peeling was evaluated on the basis of the base after the adhesive tape was peeled off according to the following five levels a to e.
a: No film peeling at all (number of film peeling eyes = 0/100)
b: Almost no film peeling (number of film peeling eyes = 1-5 / 100)
c: Some film peeling occurred (number of film peeling eyes = 6 to 20/100)
d: occurrence of film peeling (number of film peeling eyes = 21 to 50/100)
e: Adhesion failure (number of peeled films = 51 to 100/100)

(4) Moisture resistance The lens is left in a constant temperature and humidity oven (40 ° C., 90 RH%) for 10 days, and then the lens is taken out from the constant temperature and humidity oven and left at room temperature for 3 hours. went. The adhesion test was performed by the same method and the same evaluation criteria as (3) initial adhesion.

(5) Warm water resistance The lens was immersed in warm water at 80 ° C. for 2 hours, and then the lens was taken out from the warm water and cooled with water, and then an adhesion test was performed. The adhesion test was performed by the same method and the same evaluation criteria as (3) initial adhesion.

(6) Light resistance The lens was irradiated with a xenon long life weather meter (manufactured by Suga Test Instruments Co., Ltd.) for 200 hours. The lens was taken out of the xenon long life weather meter and cooled with water, and then an adhesion test was performed. . The adhesion test was performed by the same method and the same evaluation criteria as (3) initial adhesion.

(7) Alkali resistance The lens was immersed in an aqueous 10% by mass sodium hydroxide solution at 20 ° C. for 1 hour, and the lens was taken out and washed with water. The adhesion test was performed by the same method and the same evaluation criteria as (3) initial adhesion.

(8) Heat resistance The lens was glazed according to the shape of the spectacle frame, then fitted into the spectacle frame, completely tightened with screws, and placed in a constant temperature bath at 60 ° C. for 30 minutes. Thereafter, the lens was taken out, allowed to cool at room temperature for 1 hour, and then evaluated for occurrence of cracks. In the case where no cracks were generated, the presence or absence of cracks was evaluated after additional addition to a constant temperature bath at 65 ° C. for 30 minutes. Thereafter, the temperature was increased by 5 ° C., and the temperature was further increased for 30 minutes, and the temperature at which cracks occurred was defined as the heat resistant limit temperature.

(9) Impact resistance When a 16.3 g hard sphere was dropped vertically from the position of 127 cm onto the lens surface, it was evaluated as ◯ when it did not break, and x when broken or penetrated.

(10) Dyeability A lens on which a polycarbonate lens base material, a primer layer, a hard coat layer, and an organic antireflection layer were formed was dyed by the following procedure.
2 g of a staining agent Amber D for Seiko Plax diamond coating was dispersed in 1 liter of pure water at 92 ° C. to prepare a dyeing solution. The dyeing solution was heated to 85 ° C., and the polycarbonate lens was immersed for 10 minutes for dyeing. The obtained plastic lens was evaluated as follows.
A: Appearance and color tone (color unevenness) are excellent, and the difference in total light transmittance before and after dyeing is 50% or more.
X: Cracks appear on the appearance and the color tone is poor, or the difference in total light transmittance before and after dyeing is 10% or less.

(result)

As shown in Table 1, in Examples 1 to 3, it can be seen that better heat resistance and dyeability can be obtained as compared with Comparative Example 1.

  The present invention can be applied without limitation as long as it is a polycarbonate optical article formed of a polycarbonate resin. As optical articles made of polycarbonate, for example, optical lenses such as spectacle lenses, camera lenses, telescope lenses, microscope lenses, stepper condensing lenses, and other optical parts having various polycarbonate resin base materials are also used. can do.

The figure which shows the wavelength-reflectance curve of the polycarbonate lens obtained in Example 1. FIG. The figure which shows the wavelength-reflectance curve of the polycarbonate lens obtained in Example 2. FIG. The figure which shows the wavelength-reflectance curve of the polycarbonate lens obtained in Example 3. FIG. The figure which shows the wavelength-reflectance curve of the polycarbonate lens obtained by the comparative example 1. FIG.

Claims (5)

A base material made of polycarbonate resin;
An organic layer provided on the base material and composed of a single layer having a refractive index of 1.35 to 1.45;
A polycarbonate optical article characterized by comprising: The polycarbonate optical article according to claim 1,
An optical article made of polycarbonate, wherein the organic layer comprising the single layer is formed of a coating composition containing silica-based fine particles and an organosilicon compound. A base material made of polycarbonate resin;
A first layer having a refractive index of 1.7 to 1.9 and a second layer having a refractive index of 1.35 to 1.45 are provided on the base material from the base material side toward the atmosphere side. An organic antireflection layer comprising two layers laminated in order,
A polycarbonate optical article characterized by comprising: The polycarbonate optical article according to claim 3,
The first layer is formed from a coating composition containing metal oxide fine particles containing titanium oxide and an organosilicon compound,
The polycarbonate optical article, wherein the second layer is formed of a coating composition containing silica-based fine particles and an organosilicon compound. The polycarbonate optical article according to claim 1, wherein:
An optical article made of polycarbonate, characterized in that a hard coat layer or a primer layer is provided on the surface of the substrate made of the polycarbonate resin via a hard coat layer or a primer layer.

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