JPH05104673A - Reflection-preventing plastic formed object with water-repellant property and static-preventing property - Google Patents

Abstract

PURPOSE:To prevent ghost or flare from occurring by forming a plastic formed object made of specified transparent plastic formed object, the rigid coating layers formed respectively of specified compositions as starting material and a reflection-preventing film. CONSTITUTION:The transparent plastic formed object with the refraction coefficient of at least 1.48 and the organic silicon compound, etc., shown by formula I (R<1> is the organic radical with functional radical, etc., and 4-14 carbon atoms, R<2> is the hydrocarbon radical, etc., with 1-6 carbon atoms, R<3> is the alkyl radical, etc., with 1-4 carbon atoms, a and b is zero or 1, a+b is equal to 1 or 2) are formed on a transparent base plate as starting material. The rigid coating layer obtained in said process and the reflection-preventing film in which organic silicon compound, etc., shown by formula II (R<4> is the organic radical, etc., with unsaturated double bond and 2-3 carbon atoms, R<5> is the alkyl radical, etc., with 1-4 carbon atoms) are formed on said coating layer as starting raw material. The reflection-preventing plastic formed object composed of the reflection-preventing film obtained above is formed. If said object is used, when the base material is a lens, since the reflection of its surface is small, ghost or flare does not occur.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antireflection plastic molding having water repellency and antistatic properties. 2. Description of the Related Art Transparent plastic moldings are used in a large amount due to their advantages such as light weight, easy workability and impact resistance, but on the other hand, they have insufficient hardness and are easily scratched, and are easily damaged by solvents. It has the drawbacks of being easily charged, adsorbing dust to adsorb dust, and having insufficient heat resistance. Therefore, it was not practically satisfactory for use as a spectacle lens, window material, etc., as compared with an inorganic glass molded product. Therefore, as a technique for making a transparent plastic molded product more practical, a technique of applying a transparent protective coat (hard coating film) to the plastic molded product (base material) has been proposed. A "coating composition containing an organosilicon compound or a hydrolyzate thereof as a main component (resin component or film-forming component)" that is expected to give a hard coating film close to an inorganic system (for example, JP-A-52-11261). No.) has been put to practical use for spectacle lenses. However, since this coating composition is still unsatisfactory in terms of scratch resistance (hardness to scratch),
The establishment of new technology was desired. What was proposed there is a silica sol dispersed in a colloidal form in the above-mentioned protective coat (see, for example, JP-A-53-111336), which is used as a new coating composition for spectacle lenses. It has been. By the way, most plastic spectacle lenses have heretofore been manufactured by casting polymerization of a monomer called diethylene glycol bisallyl carbonate (CR-39). This lens has a refractive index of about 1.50,
Since the refractive index of the glass lens is lower than about 1.52, it has a drawback that the edge thickness becomes thicker than that of the glass lens when used as a lens for myopia, which is a main factor disliked by the wearer. Therefore, development of a monomer having a higher refractive index than that of diethylene glycol bisallyl carbonate has been promoted. For example, JP-A-55-13747 and JP-A-56-166214 are known.
JP-A-57-23611 and JP-A-57-54901 have been proposed. At present, several companies have marketed n _d = 1.54 to 1.66 medium to high refractive index plastic lenses. The coating composition containing silica sol is applied to these lenses as in the case of conventional lenses. However, the conventional coating composition has a low refractive index, and when it is used for a high refractive index plastic lens, reflection occurs at the interface between the substrate and the coating film due to the difference in the refractive index, and reflection on the coating film surface occurs. However, there is a problem in that the appearance of the lens deteriorates due to the interference with the interference fringes. In addition, in a lens with an antireflection film (made of a multilayer structure film of inorganic oxide thin film based on the optical interference theory) formed on the coating film, the reflected color becomes uneven, and the color of the lens surface seems to change depending on the position. There was a problem. As a technique for solving these problems, n
_d = 1.54 to 1.66 For medium to high refractive index plastic moldings, hard coatings do not show interference fringes and give a coating with uniform reflection color, and scratch resistance, surface hardness, abrasion resistance A coating composition for a plastic molded product having excellent properties, flexibility, transparency, antistatic property, dyeability, heat resistance, water resistance, chemical resistance, etc. has been developed. That is the invention of Japanese Patent Application No. 2-104564. Hereinafter, this invention is referred to as a prior invention. According to the invention of the prior application, (a) an organosilicon compound represented by the general formula R ¹ _a R ² _b Si (OR ³ ) _{4- (a + b)} or A hydrolyzate thereof (wherein R ¹ is a functional group or an organic group having an unsaturated double bond and having 4 to 14 carbon atoms, and R ² is a hydrocarbon group having 1 to 6 carbon atoms or a halogenated hydrocarbon) A group, R ³ is an alkyl group having 1 to 4 carbon atoms, an alkoxyalkyl group or an acyl group, and a and b are 0 or 1 respectively,
And a + b is 1 or 2. ); (B) a hard coating starting from a coating composition consisting of a colloidally dispersed composite sol of tin oxide and tungsten oxide; and optionally (c) a curing catalyst; and optionally (d) a solvent. Provided is a plastic molded product, which has a film layer formed on the surface of a transparent plastic molded product having a refractive index of 1.48 or more and which is resistant to scratches. However, since this molded product has a strong light reflection, when used for a lens for eyeglasses, there is a problem that ghost or flare is caused by the reflection on the lens surface and the product is hard to see. In order to solve the above problems, the present invention provides a transparent plastic molded product having a refractive index of 1.48 or more and the following first composition as a starting material on the transparent substrate. Provided is an antireflection plastic molded product comprising a formed hard coating layer and an antireflection film formed on the coating layer using the following second composition as a starting material. First composition: (a) An organosilicon compound represented by the general formula R ¹ _a R ² _b Si (OR ³ ) _{4- (a + b)} or a hydrolyzate thereof (where R ¹ is a functional group or An organic group having 4 to 14 carbon atoms having an unsaturated double bond, R ² is a hydrocarbon group having 1 to 6 carbon atoms or a halogenated hydrocarbon group, and R ³ is a hydrocarbon group having 1 to 4 carbon atoms. An alkyl group, an alkoxyalkyl group or an acyl group, a and b are 0 or 1 respectively,
And a + b is 1 or 2. ); (B) A coating composition comprising colloidally dispersed composite sol of tin oxide and tungsten oxide; and optionally (c) curing catalyst; and optionally (d) solvent. Second composition: (e) An organosilicon compound represented by the general formula R ⁴ Si (OR ⁵ ) ₃ or a hydrolyzate thereof (wherein R ⁴ is an unsaturated double bond-containing C 2-3 group). Organic group, hydrocarbon group with 1-3 carbons, or 1-3 carbons
Is a fluorohydrocarbon group, and R ⁵ is an alkyl group having 1 to 4 carbon atoms, an alkoxyalkyl group or an acyl group. ); (F) Epoxy resin; and optionally (c) curing catalyst; and optionally (d) solvent; Description of Component (a) Among the compounds of the general formula (1), those in which R has an epoxy group as a functional group are also called epoxysilane. Specific examples of the epoxysilane include, for example, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltrimethoxyethoxysilane, γ-glycidoxypropyltriacetoxysilane, Examples thereof include γ-glycidoxypropylmethyldimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane and β- (3,4-epoxycyclohexyl) ethyltriethoxysilane. Further, among the compounds of the general formula (1) other than those having an epoxy group as a functional group of R 1 (including those having a = 0), methyltrimethoxysilane, methyltriethoxysilane, Vinyltrimethoxysilane,
Vinyltriethoxysilane, vinyltriacetoxysilane, vinyltrimethoxyethoxysilane, γ-methacryloxypropyltrimethoxysilane, aminomethyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, phenyltri Methoxysilane, phenyltriethoxysilane, γ
Examples include -chloropropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane and 3,3,3-trifluoropropyltrimethoxysilane. The exemplified compounds of the general formula (1) mentioned above are
In each case, there are three OR groups bonded to the Si atom (a + b
= 1) trifunctional example, but there are two OR groups (a +
The corresponding compounds of b = 2) 2 functionality can of course also be used. Examples of difunctional corresponding compounds include dimethyldimethoxysilane, diphenyldimethoxysilane, methylphenyldimethoxysilane, methylvinyldimethoxysilane, and dimethyldiethoxysilane. The compound of the general formula (1) may be used alone, or two or more kinds may be mixed and used depending on the purpose. Especially when a bifunctional compound is used, it is preferably used in combination with a trifunctional compound. When used together,
On average, 2> a + b> 1. Further, it is also possible to use a compound corresponding to a tetrafunctional compound of a + b = 0. Tetrafunctional corresponding compounds are, for example, methyl silicate, ethyl silicate, isopropyl silicate, n-propyl silicate, n-butyl silicate, t-butyl silicate,
Examples include sec-butyl silicate. The compound of the general formula (1) may be used as it is, but it is preferably used as a hydrolyzate for the purpose of increasing the reaction rate and lowering the curing temperature. When two or more compounds having the same functional number are used in combination among 2-4 functional compounds, or when two or more compounds having different functional numbers are used in combination, they may be used in combination after hydrolysis. Co-hydrolysis may be performed in combination before the decomposition. Upon hydrolysis, the compound of general formula (1) becomes the corresponding silanol. Silanol rapidly undergoes dehydration condensation to become an oligomer.
Therefore, after the hydrolysis, 1-
You may leave it for 24 hours. (b) Description of components A colloidally dispersed composite sol of tin oxide and tungsten oxide is used. The ratio of tin oxide to tungsten oxide is about 2 parts by weight of tungsten oxide to 100 parts by weight of tin oxide.
100 parts by weight. The colloidally dispersed tin oxide sol, the tungsten oxide sol, and the composite sol of tin oxide and tungsten oxide are known, and some of them are commercially available. Tin oxide sol is preferred because of its high refractive index,
Although it exists as a sol by itself, it cannot stably exist with the component (a) as an essential property of the substance. Further, the tungsten oxide sol has a relatively high refractive index and exists as a sol by itself, and can stably exist with both the component (a) and the coating composition formed from the component (a) and the tungsten oxide sol. There is a problem with water resistance. By using a composite sol of tin oxide and tungsten oxide, the drawbacks of both can be compensated for and desirable properties can be brought out. That is, it is possible to obtain a coating composition that has a stable refractive index with component (a), has no problem in water resistance, and has a high refractive index. Since tin oxide has electrical conductivity, it also has the function of imparting an antistatic function to the coating film. The proportions of tin oxide and tungsten oxide are 2 to 100 parts by weight, preferably 5 to 50 parts by weight, of tungsten oxide based on 100 parts by weight of tin oxide in order to make full use of their respective advantages and to make up for the drawbacks. When the ratio is less than 2 parts by weight, the stability when mixed with the component (a) is insufficient, and when the ratio is more than 100 parts by weight, the water resistance of the coating composition is poor. The particle size of the sol is 1 to 200 mμ, especially 5 to 100 m
μ is preferable. If it is smaller than this, the production is difficult, the stability of the sol itself is poor, and the effect is small. If it is larger than this, the stability of the coating composition, the transparency and smoothness of the coating film are deteriorated. The sol is a colloidal solution in which fine particles of a composite of tin oxide and tungsten oxide are dispersed in water, an organic solvent or a mixed solvent of both, and it is useful to add a suitable alkali, particularly an organic amine, to stabilize it. .. Description of component (c) The curing catalyst (c) is used as needed to shorten the time required to polymerize the component (a) to form a coating film having a three-dimensional network structure. For example, the following is used. (1) amines such as monoethanolamine, diethanolamine, isopropanolamine, ethylenediamine, isopropylamine, diisopropylamine, morpholine, triethanolamine, diaminopropane, aminoethylethanolamine, dicyandiamide, triethylenediamine, 2-ethyl-4-methylimidazole Can be mentioned. (2) Various metal complex compounds Particularly useful metal complex compounds include aluminum acetylacetonate, aluminum bisethylacetoacetate monoacetylacetonate, and aluminum-di-n-butoxy, from the viewpoint of solubility, stability and catalytic effect. Domonoethyl acetoacetate, aluminum-iso-
Propoxide monomethyl acetoacetate and the like can be mentioned. Other examples include chromium acetylacetonate, titanyl acetylacetonate, cobalt acetylacetonate, iron acetylacetonate, manganese acetylacetonate, nickel acetylacetonate, and the like. Further, aluminum ethylenediamine tetraacetate, iron ethylenediamine tetraacetate and the like are also useful. (3) Metal alkoxides such as aluminum triethoxide, aluminum triethoxide
n-propoxide, aluminum tri-n-butoxide, tetraethoxy titanium, tetra n-butoxy titanium, tetra is
Examples include o-propoxy titanium and the like. (4) Organic metal salts such as sodium acetate, zinc naphthenate, cobalt naphthenate, zinc octylate, tin octylate and the like can be mentioned. (5) Perchlorates such as magnesium perchlorate and ammonium perchlorate. (6) Organic acids or their anhydrides such as malonic acid, succinic acid, tartaric acid, adipic acid, azelaic acid, maleic acid, o-phthalic acid, terephthalic acid,
Fumaric acid, itaconic acid, oxaloacetic acid, succinic anhydride,
Examples thereof include maleic anhydride, itaconic anhydride, 1,2-dimethylmaleic anhydride, phthalic anhydride, hexahydrophthalic anhydride and naphthalic anhydride. (7) Lewis acids such as ferric chloride and aluminum chloride can be mentioned. (8) Metal halides such as stannous chloride, stannic chloride, tin bromide, zinc chloride, zinc bromide, titanium tetrachloride, titanium bromide, thallium bromide, germanium chloride, hafnium chloride, lead chloride, odor Examples include lead oxide and the like. The above catalysts may be used as a mixture of two or more kinds without being used alone. In particular, when the component (a) has an epoxy group, one that also serves as a ring-opening polymerization catalyst for the epoxy group may be used. Above all, aluminum complex compounds are one of the preferred catalysts. Description of Component (d) The solvent (d) is used as necessary to make the coating composition liquid or to reduce the viscosity. For example, water, lower alcohol, acetone, ether, ketone, ester and the like are used. In the coating composition of the present invention,
Generally, 10-400 parts by weight (solid content), preferably 50-250 parts by weight (solid content) of (b) component is used per 100 parts by weight of (a) component (solid content), and (a) component and (b) It is suitable to use 0.00001-20 parts by weight of the component (c) per 100 parts by weight of the total components (solid content). The component (d) is used in an appropriate amount depending on the viscosity of the composition. In addition to the above components (a)-(d), if necessary, for example, a base material on the side to be coated (plastic molding)
Various additives may be used in combination for the purpose of improving the adhesiveness with, improving the weather resistance, or for improving the stability of the coating composition. Examples of additives include PH modifiers, viscosity modifiers, leveling agents, matting agents, dyes, pigments, stabilizers, UV absorbers, antioxidants and the like. In addition, an epoxy resin, a polyol, a fibrin resin, a melamine resin or a urethane resin may be used in combination for the purpose of improving the dyeability of the coating film. For the purpose of improving the fluidity at the time of coating and improving the smoothness of the coating film, it is possible to use various kinds of surfactants in combination with the coating composition, in particular, a block or graft copolymer of dimethylsiloxane and alkylene oxide. Polymers and further fluorochemical surfactants are effective. In some cases, an inorganic filler such as silica sol, antimony oxide sol or diamond fine particles may be used in combination as long as the object of the present invention is not impaired. (e) Description of component Specific examples of the compound of the general formula (2) include, for example, methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetoxysilane, vinyltrimethoxyethoxysilane. , 3,3,3-trifluoropropyltrimethoxysilane and the like. These compounds may be used as they are, but are preferably used as a hydrolyzate for the purpose of increasing the reaction rate and lowering the curing temperature. In addition, after the hydrolysis, it may be left for 1 to 24 hours so that the hydrolysis reaction proceeds sufficiently. (f) Description of components Examples of the epoxy resin include monoethyl alcohol monoglycidyl ethers such as 2-ethylhexyl glycidyl ether and 2-methyloctyl glycidyl ether.
Tells, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, butanediol diglycidyl ether, hexanediol diether Glycidyl ether, octanediol diglycidyl ether, neopentyl glycol diglycidyl ether and other divalent alcohols
And polyvalent alcohols such as glycerin diglycidyl ether and trimethylolpropane diglycidyl ether.
Diglycidyl ethers, bisphenol A diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, bisphenol and polypropylene glycol
Triglycidyl triglycerides such as diglycidyl ether of adduct, aromatic ring, diglycidyl ether of alicyclic compound, glycerin triglycidyl ether, trimethylolpropane triglycidyl ether, etc. A
And the diglycidyl esters of polycarboxylic acids. In addition to these glycidyl compounds, a polyolefin-based epoxy resin synthesized by a peroxidation method and an alicyclic epoxy resin such as cyclopentadiene oxide can also be used. Aliphatic or alicyclic epoxy resins are particularly preferable. The coating composition which is the second composition as well as the coating composition which is the first composition (c) (d)
Ingredients can be used. In the coating composition which is the second composition, generally, 3 to 30 parts by weight (solid content) of the (f) component is used per 100 parts by weight (solid content) of the (e) component, and Total 100 parts by weight of component (f) (solid content)
Therefore, it is suitable to use 0.00001-20 parts by weight of the component (c). The component (d) is used in an appropriate amount depending on the viscosity of the composition. These compositions are applied to a transparent plastic molding (base material). As described above, the effect of the present invention is remarkable in the medium-high refractive index substrate having n _d = 1.54 to 1.66. However, the present invention is not limited to this, and is also effective for a substrate having n _d = 1.48 or more. Examples of such a substrate include polymethylmethacrylate and copolymers thereof, acrylonitrile-styrene copolymer, polycarbonate,
Examples include cellulose acetate, polyvinyl chloride, polyethylene terephthalate, epoxy resin, unsaturated polyester resin, polyurethane resin, and CR-39 polymer. In coating the base material, various pretreatments can be applied to the base material for the purpose of cleaning, improving adhesion, and the like. Particularly effective means for the present invention include activation gas treatment, chemical treatment and the like. When the coating layer (antireflection film) of the second composition is formed on the coating layer (hard coating film) of the first composition, the hard coating film is similarly subjected to activation gas treatment, chemical treatment, etc. Pretreatment may be performed. The coating means is brush coating, dipping, roll coating,
Conventional coating methods such as spray coating, flow coating and spin coating can be used. After coating, the coating composition is cured by heat treatment in many cases to obtain a hard coating film or an antireflection film. The heating temperature is about 50-200
A sufficient effect can be obtained at ° C, preferably 80-140 ° C. A hard coating thickness of 0.5-10 μm is sufficient. The thickness of the antireflection film is about 0.1-0.5 μm. Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited thereto. Examples (1) Formation of Hard Coating Film In a reaction vessel equipped with a prepared rotor of Preparation Composition A, 248 parts by weight of γ-glycidoxypropylmethyldiethoxysilane was charged, and a magnetic stirrer was used. With vigorous stirring, 36 parts by weight of 0.05 N hydrochloric acid aqueous solution was added at once. Immediately after the addition, the solution was inhomogeneous, but in a few minutes, the solution became homogeneous and colorless and transparent while generating heat. The mixture was further stirred for 1 hour to obtain a hydrolyzate corresponding to the component (a).
The resulting hydrolyzate contained ethanol (56.6) as the component (d).
After adding 5 parts by weight of ethylene glycol and 53.4 parts by weight of ethylene glycol, aluminum acetylacetonate was added as component (c).
Add 4.7 parts by weight and mix and dissolve thoroughly to prepare Pre-composition A
Was adjusted. 212.4 parts by weight of γ-glycidoxypropyltrimethoxysilane were charged into a reaction vessel equipped with a rotor for adjusting Preliminary Composition B, the temperature inside the vessel was maintained at 10 ° C, and the mixture was vigorously stirred using a magnetic stirrer. Meanwhile, 48.6 parts by weight of 0.01 N hydrochloric acid aqueous solution was gradually added dropwise. When the cooling was stopped after completion of the dropping, a uniform and colorless transparent solution-like hydrolyzate corresponding to the component (a) was obtained. The resulting hydrolyzate contains ethanol as component (d).
After 77.1 parts by weight and 37.7 parts by weight of ethylene glycol were added, 7.65 parts by weight of aluminum acetylacetonate was added as the component (c), and they were sufficiently mixed and dissolved to prepare a preliminary composition B. In the adjusted glass container of the first composition, the preliminary composition A prepared in the above (1) (2), B
Weigh and pour 50 parts by weight of each of them (including solvents and other substances that are not solids) into a commercially available composite sol of tin oxide and tungsten oxide (aqueous dispersion sol, average particle size 10-1).
5mμ, ratio of tin oxide to tungsten oxide 100 parts by weight / 4
0 parts by weight, solid content 20%) 200 parts by weight (not the solid content as it is), silicone surfactant 0.45 parts by weight, and by thoroughly stirring and mixing, a uniform, colorless and transparent solution coating A composition (first composition) was prepared. Prepare a polyurethane spectacle lens base material with a refractive index nd = 1.59, apply the above-mentioned first composition by the dipping method (pulling speed 10 cm / min), and heat-treat at 100 ° C for 1 hour to form a coating film. Hardens, which results in a hard coating (thickness 1-2 μm)
Was formed. (2) Formation of low-refractive index hard layer 84 parts by weight of methyltrimethoxysilane were charged into a reaction vessel equipped with a rotor, and 12 parts by weight of 0.05N hydrochloric acid aqueous solution were added at once with vigorous stirring using a magnetic stirrer. did. Although it was a heterogeneous solution immediately after the addition, it became a uniform, colorless and transparent solution with heat generation in a few minutes. This is
It is the component (e). In this liquid, 9 parts by weight of epoxy resin (Denacol EX313, trade name, manufactured by Nagase & Co., Ltd.) as component (f), (c)
2.4 parts by weight of aluminum acetylacetonate as a component, 700 parts by weight of isopropyl alcohol as a component (d), and 0.1 parts by weight of a silicon-based surfactant were added, and the mixture was thoroughly stirred and mixed to prepare a uniform colorless transparent solution. Two compositions were prepared. The second composition adjusted in the lens treated with
Apply by dipping method (pulling speed 10 cm / min), and apply at 100 ° C for 2
The coating film was cured by heating for a period of time to form an antireflection film (thickness 0.1 to 0.5 μm). (3) Kimwipe the lens obtained by evaluation and static electricity measurement (made by Tojo Kimberley)
The electrostatic potential immediately after rubbing 10 times with was measured to be 40V. The closer the electrostatic potential is to 0, the better the antistatic property. 10 for uncoated plastic lenses
Indicates a value of 00V or higher. The contact angle with water of the lens obtained by measuring the water repellency was 95 °. The larger the contact angle, the more excellent the water repellency. -The luminosity transmittance of the lens obtained by the measurement of luminosity transmittance was 96.5% when measured with a luminosity transmittance measuring instrument MODERL304 manufactured by Asahi Bunko Co., Ltd. The more transmitted light, the less reflected light. Therefore, the greater the transmittance, the better the antireflection property. Comparative Example For comparison with the above-described examples, the lens (previous invention) on which an antireflection film was not formed was similarly evaluated. As a result, the electrostatic potential is 30 when measuring the amount of static electricity.
V, water repellency was measured at a contact angle of 70 ° and luminosity transmittance was measured as 91.0%. Comparing the comparative example with the example, it is understood that the example is better in the measurement of water repellency and the measurement of the luminous transmittance. Although the amount of static electricity is worse in the numerical value in the embodiment, the value in the embodiment is not a bad value considering that the ordinary plastic lens shows 1000 V or more. As described above, according to the present invention, (1) high antireflection property and uniform reflection color can be obtained. (2) The surface is excellent in antistatic property, water repellency and oil repellency, and dirt, dust and dust do not adhere. (3) Surface scratch resistance, surface hardness, abrasion resistance, flexibility,
Excellent transparency, heat resistance, water resistance, warm water resistance, chemical resistance, etc. (4) The surface has good slip characteristics (low coefficient of friction). (5) The presence of the hard coating film and the antireflection film does not reduce the impact resistance of the substrate. And so on. When the base material is a lens, there is little reflection on the surface, so that the wearer can easily see the object and his eyes are not tired.

Claims (1)

Claims: 1. A transparent plastic molded product having a refractive index of 1.48 or more, a hard coating layer formed on the transparent substrate using the following first composition as a starting material, and the following second composition: And an antireflection film formed on the coating layer by using the product as a starting material. First composition: (a) An organosilicon compound represented by the general formula R ¹ _a R ² _b Si (OR ³ ) _{4- (a + b)} or a hydrolyzate thereof (where R ¹ is a functional group or An organic group having 4 to 14 carbon atoms having an unsaturated double bond, R ² is a hydrocarbon group having 1 to 6 carbon atoms or a halogenated hydrocarbon group, and R ³ is a hydrocarbon group having 1 to 4 carbon atoms. An alkyl group, an alkoxyalkyl group or an acyl group, a and b are 0 or 1 respectively,
And a + b is 1 or 2. ); (B) A coating composition comprising colloidally dispersed composite sol of tin oxide and tungsten oxide; and optionally (c) curing catalyst; and optionally (d) solvent. Second composition: (e) An organosilicon compound represented by the general formula R ⁴ Si (OR ⁵ ) ₃ or a hydrolyzate thereof (wherein R ⁴ is an unsaturated double bond-containing C 2-3 group). Organic group, hydrocarbon group with 1-3 carbons, or 1-3 carbons
Is a fluorohydrocarbon group, and R ⁵ is an alkyl group having 1 to 4 carbon atoms, an alkoxyalkyl group or an acyl group. ); (F) Epoxy resin; and optionally (c) curing catalyst; and optionally (d) solvent;