JPS61245101A - Plastic lens having high refractive index - Google Patents

Abstract

PURPOSE:To obtain the titled lens having an excellent anti-wear property by providing a primer layer composed of an acryl-styrene type emulsion resin on a surface of a plastic material contg. an aromatic compd. having a substituent on the nucleus as a main component, and by providing a silicon type cured coating layer capable of drying and having the anti-wear property on the primer layer. CONSTITUTION:The nonionic aqueous emulsion contg. a copolymer composed of an acrylic acid ester or a methacrylic acid ester and a styrene as a main component is coated on a surface of a lens substrate composed of a copolymer contg. a polymerizable monomer shown by formula I and the table II as the primer layer, and is dried to form a thin film having 0.1-2mum in thickness. The coating composition consisting of one kind or more than two kinds of org. silicon compds. shown by formula III, the colloidal silica having a particle size of 9-100mmmu, a polyfunctional epoxy compd. and magnesium perchlorate is coated on the primer layer, and is cured with heating to form the cured layer composed of the silicon resin having 0.5-10mum in thickness.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a plastic lens substrate surface having a refractive index of about 1.6, which has excellent abrasion resistance and excellent stainability with disperse dyes. This invention relates to a high refractive index plastic lens formed with a hardened coating layer.

[Summary of the invention]

The present invention provides a primer layer made of an acrylic-styrene emulsion resin on the surface of a plastic material whose main component is a nuclear-substituted aromatic compound that has a high refractive index and is suitable for optical applications such as eyeglass lenses. A high refractive index plastic lens with excellent dyeability and abrasion resistance, as well as excellent water resistance and coating adhesion, has been created by creating a wear-resistant Cricon-based hardened coating layer that is dyeable and wear-resistant. It is.

[Prior art]

Synthetic resins have the properties of being easy to process, lightweight, difficult to break and safe, and transparent materials have recently become rapidly popular in the field of optical materials, especially eyeglass lenses. This movement toward plastics has increased the demand for higher-grade lenses, that is, thinner plastic lenses made of high refractive index resin, and the materials used for these lenses include JP-A-57-28117, JP-A-57-549Q1, and JP-A-57. -66401 No. 57-
No. 102601, No. 57-104101, No. 57-1
No. 04901, No. 58-18602, No. 58-721
No. 01, No. 58-72102, 1i158-7210
No. 3 discloses a resin comprising a copolymer of a styrene monomer, a di(meth)acrylate having a halogen-substituted aromatic ring, and an allyl compound or a bifunctional di(meth)acrylate. These technologies have produced unprecedentedly superior thermosetting high refractive index plastics.

However, like general plastics, this material has poor wear resistance, so the ability to improve wear resistance is essential.

Therefore, we proposed a plastic lens with an organosilane-based hardened layer added to this fabric material (Japanese Patent Laid-Open No. 5
No. 8-169101) Although good initial properties can be obtained by this method, it has been found that it has the disadvantage of poor durability and water resistance. That is, the challenge is to ensure even stronger adhesion between the wear-resistant hardened layer and the base material.

Therefore, as a method for improving the adhesion between the base material and the cured layer, for example, a method of graft polymerizing a polymerizable monomer onto the base material using a voltage-loaded flame (JP-A-50-49
374) and various methods cited in the same publication,
In addition, a method of forming a metamorphic layer on the plastic surface using plasma gas and partially changing it with a solvent (Japanese Unexamined Patent Publication No. 58-2
04031) or a primer consisting of a copolymer of methyl methacrylate and methyl acrylate (%
-179237), a primer consisting of an acrylic polymer and an alkyltrialkoxysilane (%
No. 162729) A primer made of a self-crosslinking acrylic copolymer (Japanese Unexamined Patent Publication No. 57-76035), a primer containing a jepoxy compound as a component (Japanese Patent Application Laid-open No. 57-45)
No. 168) Method for improving adhesive strength by applying melamine-modified acrylic emulsion (Japanese Patent Application Laid-open No. 56-88469)
In addition, a method using polyfunctionality and nil polymer as an undercoat layer (JP-A-57-140162, JP-A No. 56-2416)
No. 4), a primer consisting of a self-crosslinking acrylic polymer or a crosslinking-reactive copolymer (U.S. Pat. No. 37073)
No. 97) discloses a method of improving the surface of a plastic material to improve its adhesion to a pattern having a function such as an abrasion-resistant coating. Some primers made of acrylic resin are commercially available.

[Problems and objects to be solved by the invention] However, in these conventional techniques, physical or chemical treatment of the surface of the high refractive index glass material used in the present invention has no effect at all, and it is difficult to apply a primer to the surface. This method has the problem that it is not possible to obtain sufficient adhesion to both the fabric material and the cured film described in the non-invention.

Therefore, the present invention was made to solve the above-mentioned problems, and the purpose is to improve the surface condition and generate strong adhesion on the high refractive index plastic surface shown in the present invention. By applying the silicone resin cured layer of the present invention after coating and curing the brimer composition, it has excellent abrasion resistance and dyeability with disperse dyes, etc., as well as hot water resistance, durability, chemical resistance, The object of the present invention is to provide a high refractive index plastic lens with improved quality and excellent weather resistance and adhesion between a cured layer and a base material.

[Means for solving problems]

The high refractive index plastic lens of the present invention has the general formula [f]
and [1] on the surface of a lens base material made of a copolymer mainly composed of a polymerizable monomer represented by [1]; A nonionic or anionic aqueous emulsion is applied and dried or thermally cured to form a thin film with a thickness of α1 to 2μ, and then b) a coating composition consisting of the following ■, ■, ◎, and ■ is applied. C obtained by heat curing
It is characterized by having a hardened layer made of silicone resin with a film thickness of L5 to 10μ.

--・-CI] X" (In the formula, R1 represents hydrogen or a methyl group, and Xl.

X represents a halogen excluding fluorine, m+n each represents an integer, and m+n is 0 to B. )■ General formula n
"t ■ R"-81-(OR'), -1 (wherein R2 is an organic group having a hydrocarbon group having 1 to 6 carbon atoms, a vinyl group, a methacryloxy group, or an epoxy group, Rs
is a hydrocarbon group having 1 to 4 carbon atoms, R4 is a hydrocarbon group having 1 to 5 carbon atoms, an alkoxylalkyl group, or a hydrogen atom, t
1yf of an organosilicon compound represented by: One or more types: (1) colloidal silica with a particle size of 1 to 100 millimicrons, and (2) a polyfunctional epoxy compound; (2) magnesium perchlorate. The high refractive index glass described in the present invention is:

For example, it can be obtained by implementing the method disclosed in Japanese Patent Application Laid-Open No. 58-72101. In addition to [1] and ([), various ultraviolet absorbers and fluorescent agents, diethylene glycol bisallyl carbonate, alkylene glycol di(meth)acrylate, esters of organic acids and allyl alcohol, allyl ether compounds, etc. Polymerizable monomers can also be added.

Examples of acrylic and methacrylic monomers used in the brimer resin used in the present invention include acrylic acid and methacrylic acid, methanol, ethanol, 1-
esters with lower alcohols such as propatool, n-7'tanol, or.

Examples include benzyl alcohol and esters of aromatic compounds containing alcoholic hydroxyl groups. Also,
The remaining aromatic vinyl compounds include styrene,
Examples include chlorstyrene and bromostyrene. Ingredients other than these include chrycidyl methacrylate, chrycidyl acrylate, aminoethyl acrylate, dimethylaminoethyl acrylate, 44-epoxycyclohexylethyl methacrylate, and tetrahydrofurfuryl 7crystalline, within 5% by weight of the resin component.
-), 2-hydroxy-3-phenyloxyzulobil acrylate, ethyl carpitol acrylate, 2-hydroxy 7-ethyl acrylate, 2-hydroxy 7-ethyl acrylate, 2-ethyl succinate acrylate, 2-ethyl 7-tal acrylate acids, or their methacrylates, and di- or triacrylates of polyhydric alcohols such as engineered ethylene glycol, diethylene glycol, polyethylene glycol, glycerin, trimethylolpropane, neopentyl glycol, 1,6-hexanediol, octylene glycol, etc. The ingredients can include methacrylates, acrylic acid or methacrylic acid, and the like. The composition of this acrylic and/or methacrylic resin and aromatic vinyl resin is determined by the combination of compounds, but it is a copolymer containing at least 20% by weight of methyl methacrylate and at least 10% by weight of styrene. It is preferable that (9) Copolymers can also be obtained by radical copolymerization of these monomers in an organic solvent, but in order to generate stronger adhesion, it is necessary to add a nonionic or anionic surfactant in water. An aqueous emulsion obtained by radical polymerization in a fraction is suitable. In addition, the number average molecular weight at this time is 10,000 or more, and the particle size is 10 to 50.
It is necessary that it be 0 mμ. That is, in fi liquid polymerization, copolymers with a molecular weight of 10,000 or less are obtained, but these are
Adhesion is not sufficient and the final product has poor water resistance and weather resistance. In addition, the particle size of the emulsion particles is 500 mμ
If this is the case, after molding as Zurimer or when forming a cured silicone resin film, white cloudiness will occur. The resin emulsion thus obtained can be further mixed with alcohols such as methanol, ethanol, 1-gropanol sQ-butanol, and cellosolves such as methylceronelube and jCf k -IP l=fsolf.
14. It is used after being diluted with diethylene glycol ethers such as lfk calpitol and butyl carpitol, and water-soluble organic solvents such as dioxane, tetrahydrofuran, and acetone. Furthermore, methyl isobutyl ketone.

Methyl ethyl ketone, methyl acetate, #ethyl ethyl.

It is useful to add solvents with various evaporation rates and viscosities, such as butyl acetate, dimethylformamide, globylene glycol monomethyl ether, toluene, xylene, etc., and to improve them according to the door-painting work. 49. Silicon based or as required.

Adding fluorine-based surfactants to improve coating properties,
It is also possible to impart Fyr-like functions to the final product by adding ultraviolet absorbers, dyes, coloring photochromic substances, and the like. The preferred thickness of this i- is I11~
It is 2μ.

The coating method for the brimarano can be arbitrarily selected from the tipping method, spin cord method, flow coating method, and sdale method. Next, air dry.

Do not do this before, at a temperature of 50C to 130C, 2
By drying and curing for ~60 minutes, a uniform Wli1 layer can be formed.

Regarding the silicone-based cured film to be applied to the surface of the primer layer obtained in this way, Japanese Patent Application No. 58-106
(The method described in No. 192 is preferred.

That is, by applying and curing a coating liquid consisting of the above-mentioned components ■■◎ and O, a target abrasion-resistant cured film is formed.

In this case, the above-mentioned cured odor-containing component (2) is methyltrimethoxy7rane, ethyltriethoxysilane, methyltriethoxysilane, phenyltrimethoxysilane, dimethyldimethoxysilane, phenylmethyldime)-? Disilane, vinyltriethoxysilane, vinyltris (β-
Methoxyethoxysilane 7) Silane, vinyltriacetoxysilane%r/'j siglobiltrimethothodisilane, T
-Glycidoxyglopylmethyldietobovine disilane, β-
Examples include (5,4 epoxycyclohexyl)ethyltrimethoxysilane. These may be used alone or in combination of two or more. In addition, it is preferable to use these by hydrolyzing them in the presence of an acid in an organic solvent such as alcohol, and even if they are hydrolyzed alone and then mixed with the colloidal silica of component (■), they are not hydrolyzed after being mixed with component (■). Either is fine.

Colloidal silica having a particle size of 1 to 100 millimeters as component (2) is a commercially available colloidal solution in which high molecular weight inorganic silicic acid fine particles are dispersed in a water or alcohol dispersion medium.

As the polyfunctional epoxy compound of component @, (poly)ethylene glycol, (poly)propylene glycol,
Ninomiya hw & alcohol diglycidyl ether S such as neopentyl glycol, catechol, resorcinol, alkylene glycol, hexanediol, bisphenol A1 hydrogenated bisphenol A, butanediol,
Examples include di- or triglycidyl ethers of trifunctional alcohols such as trimethylolgloban and glycerin.

By using component 01 or more than 2 parts, component ■ and magnesium perchlorate as a curing catalyst in component By adding the curing catalyst of component (2), which is optimal for the above-mentioned components (2), (2), and (◎), it is possible to obtain a coating material with an extremely long pot life, which is unprecedented.

The mixing amount of each component to obtain these hardened layers is preferably Component (solid content calculated as 810) 1
00 parts by weight, add up component ■ and convert to 9 solids)
Component ◎ is preferably 50 to 600 parts by weight, more preferably 50 to 500 parts by weight, and Component ◎ is 100 to 500 parts by weight. Furthermore, component (1) is the total residual solid content IIL01-5
It is desirable to use it within the range of 0.

Also, alcohols, ketones, and cellosolves.

Solvents such as carboxylic acids can be added alone or in combination, and if necessary, surfactants, chicken agents, etc. can be used to improve coating properties, and ultraviolet absorbers can be added as needed. , antioxidants, stabilizers,
Properties can also be improved by adding antistatic agents and the like.

Further, the coating and curing are the same as those described for the coating and curing of the brimer. The curing temperature is preferably 800 or higher;
Moreover, desired characteristics can be obtained by heating for 30 to 300 minutes to advance the curing reaction.

Further, the thickness of the cured layer obtained in this way is 2 to 10
μ is appropriate. If the film thickness is less than 2 μm, the hardness is not as high as that of light, and if it is more than 10/J, it takes a long time to cure and may cause cracks, which is not preferable.

In addition to the base material of this invention, PVC, polycarbonate, A
It is further possible to apply BC resin, AH resin, PMMA resin, diethylene glycol bisallyl carbonate resin, polystyrene resin, etc. to lenses and other molded articles.

[Effect]

According to the structure of the present invention, a primer layer made of a specific component that has excellent adhesion to the lens base material described in the present invention and also has excellent adhesion to a silicone-based cured layer applied on top of the primer layer is provided between the layers. It is thought that the strong adhesion was achieved by optimizing the coating and drying conditions.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to examples, but the present invention is not limited to these examples. Note that parts and parts in the examples are based on it.

Example 1゜(1) Production of high refractive index plastic lens Styrene 50
parts, 2.2-bis(3,5-diglome, 4-methacryloyloxethoxy7phenyl)propane 4a 5 parts, diethylene glycol bisallyl carbonate 2.8 parts, t
-butyl peroxyneodecanate 1.5 parts, 2-(2
2 parts of '-hydroxy-5'-methylphenyl)benzotriazole α are mixed and stirred. Next, prepare a sample of this mixture.
'#lJ was removed with a filter, and the oral cavity was injected into a space made of a gasket made of soft polyvinyl chloride and two glass molds. Next, use SaC for 4 hours.

10 hours linearly from 300 to SOC, 7 from SaC
00 linearly for 2 hours, 70C for 1 hour, 80C for 2 hours.
After heating for a period of time, the gasket and glass mold were separated. Furthermore, the obtained lens was annealed at 110C for 2 hours to remove distortion inside the lens. The lens obtained in this way.

It had a refractive index of 1.595 and an Abbe number of 52, which was good as a high refractive index 1 lath lens for optical use.

This lens is used as a base material lens for a high refractive index plastic lens used below.

(2) Preparation of Brimer Coating Solution S and Application Curing Stirrer (5 tons of 5 USD autoclay 7, 800 parts of distilled water, sodium dodecylbenzenesulfonate (manufactured by NOF ■, product name: Newlex R'') ) was added, and the mixture was kept at 30-)35°C and stirred at 40 to 60 revolutions per minute to dissolve the contents.Next, methyl methacrylate from which the polymerization inhibitor was removed by distillation 3004. 5 parts of n-dodecyl mercaptan was dissolved in 20 parts of n-butyl acrylate and 200 parts of styrene and added to the autoclave. After replacing the atmosphere in the reactor with sufficient nitrogen. , stirring was started at 500 revolutions per minute.

Subsequently, 4 parts of potassium persulfate was dissolved in 564 g of distilled water and added dropwise over 1 hour.

Subsequently, the speed was set to 50 revolutions per minute, the internal temperature was heated to 800 °C, and the reaction was carried out for about 3 hours.

After the reaction was completed, a solution prepared by dissolving 3 parts of sodium dimethyldithiocarbamate in 100 parts of distilled water was injected as a stop solution to stop the reaction.

The emulsion solution thus obtained had a solid content concentration of 37% and a particle size of 500 mμ or less. Further, the molecular tFi of this polymer was approximately 100,000, which was approximated by the viscosity method.

Next, 60 parts of methanol was slowly added to 30 parts of this emulsion solution while stirring, followed by 50 parts of methyl cellosolve, 10 parts of dimethylformamide, and a silicone surfactant (Japan Unicar Co., Ltd. trade name @Y-70021). 105 parts of was added to prepare a primer solution.

This primer solution was thoroughly filtered through a membrane filter with a pore size of 1μ, and then applied to the base lens obtained by the dipping method.The pulling rate at this time was 1OW per minute. As a result, the primer film thickness after curing (LSI) was obtained.

The coated lenses were cured and baked in a hot air drying oven at 60° C. for 1 hour, resulting in lenses with good appearance.

(3) Preparation and coating of cured coating liquid 249 parts of r-glycidoxyglobyltrimethoxysilane, colloidal silica (manufactured by Nichijo Kagaku Kogyo ■0 methanol silica sol 1)
126 parts of solid content (50 g) and 4 methyl cellosolve
68 parts of α05N hydrochloric acid was gradually added dropwise to 64 parts of the solution to effect hydrolysis. After this solution was aged at 0°C for 24 hours, 86 parts of glycerin diglycidyl ether (1Denacol EX313' manufactured by Nagashio Sangyo ■) and 7 parts of magnesium perchlorate were added at room temperature and stirred to make it homogeneous. Add to this a flow control agent (Y-70 manufactured by Nippon Unicar Co., Ltd.).
A coating liquid was prepared by adding a few drops of 02'').To this liquid, the above (
The high refractive index plastic lens coated with pliers and dried in step 2) was immersed, pulled up at a speed of 203 per minute, coated, and heated at 80C for 1 hour and at 130C for 1 hour to cure. The film thickness at this time was 3μ, just in case.

(4) Performance evaluation test adhesion: With a so-called cross-cut chighist, 11 parallel cuts were made at right angles with a knife,
Create 100 squares of 111II3.

Next, adhesive tape (trade name "Cello Tape") was strongly applied and scratched rapidly in a 90° direction, and the results were displayed using the remaining squares as the numerator and the total squares as the denominator.

Abrasion resistance: 1aIi ◆0000 Steel Cool (manufactured by Nippon Steel Wool@) was applied with a 1-load and rubbed 10 times.The degree of scratches on the glass was A.

The acrylic resin was evaluated on a five-point scale with E as the rating.

Hot water resistance: After the lenses were immersed in boiling pure water for 1 hour, the abrasion resistance test was conducted in the same manner as above.

Stainability: ? 3C: A dyeing solution was prepared by dissolving (1) Suwa Seiko Kin's Vistabrax Diamond Coat dyeing agent and the same dyeing aid 3- in 1 ton of pure water.

The lenses were immersed in this solution for 10 minutes and dyed, giving 510%
The transmittance of monochromatic light of nm was measured.

Chemical resistance: Appearance of the lens after 1 hour immersion in 4% hydroxide solution and 24% hydroxide in 10% hydrochloric acid.
The appearance after soaking for a time was evaluated.

'Weather resistance: Evaluated by the appearance of the coating film after 500 hours of ultraviolet irradiation using a Gisenon Langfade meter.

The results of each evaluation are shown in Table-1.

Example 2 (1) Production of high refractive index plastic lens In Example 1, diethylene glycol bisallyl carbonate,
and 2-(2'-hydroxy-3'-methylphenyl)penztriazole is not used, and 1.5 parts of t-butylbaroxybeverley) is used instead of t-butylbaroxyneotecanate. Other than that, Example 1
A good high refractive index lens was obtained in the same manner as above.

(2) Preparation and coating curing of primer coating liquid As a commercially available aqueous acrylic-styrene emulsion, F
430 (Showa Kobunshiho product, solid content concentration 45 cm) was used. That is, to 20 parts of the aqueous emulsion, 20 parts of pure water and 20 parts of methanol were slowly added under strong stirring, and then,
80 parts of ethyl cellosolve and 10 parts of globylene glycol monomethyl ether were added. Next, 2.5 parts of para-1-butylphenyl salicylate and 5 parts of a polymer stabilizer (manufactured by Sankyo ■, trade name "Sanol LS-770") were added, sufficiently dissolved, and filtered to prepare the primer coating solution. And so.

This coating liquid was applied to the lens obtained in this example in the same manner as in Example 1.

(3) Preparation and application of cured coating liquid. As a cured coating liquid, 108 parts of methyltrimethoxy 7 run, ingropanol-dispersed colloidal silica (manufactured by Catalysts & Chemicals Industry Co., Ltd.'08C) was used.
Q, 05N was added to a solution consisting of 212 parts of AL-1452' (solid content 30%) and 439 parts of isopropanol.
Hydrolysis was carried out by gradually dropping 52 parts of hydrochloric acid. After aging this solution in DC for 24 hours, 185 parts of 1,6-hexanesiol diglycidyl ether (Kyoeisha Yushihitsu Evolite 1600'') and 5 parts of magnesium perchlorate were added at room temperature and stirred to make it homogeneous. In addition, Flow Control Sj <Y-700 manufactured by Nippon Unicar Co., Ltd.
A coating solution was prepared by adding several liters of 2'). The lens treated with the brimer was immersed in this solution, and
The application process and evaluation were conducted in the same manner as above.

Example 5 In preparing the Brimer solution of Example 2,
F- as a commercially available acrylic-styrenic aqueous emulsion
1 primer was applied in the same manner as in the example except that Sevian A4719 (product of Daicel Chemical Industries, solid content concentration 50%) was used instead of 450, and para-t-butylphenyl salicylate was not added. .

Next, as a cured coating liquid, γ-glycidoxyglobyltrimethoxysilane 118fflS, ingropanol-dispersed colloidal silica (Catalysts & Chemicals Industry ■"08CAL-
53 parts of 0.05N hydrochloric acid was gradually added dropwise to a solution consisting of 271 parts of 1452' (solid content concentration 30%) and 595 parts of Improper Tool to perform hydrolysis. This solution was diluted with OC.
After aging for 4 hours, glycerin diglycidyl ether (
Made by Nagase Sangyo ■1 Denacol EX515')%・164
1 part and 5 parts of magnesium perchlorate were added at room temperature and stirred until homogeneous. A few drops of a flow control agent ("Y-7002" manufactured by Nippon Unicar Co., Ltd.) was added to this to prepare a coating liquid. Immerse the lens coated with the primer in this solution,
The same coating and evaluation as in Example 1 were performed.

Comparative Example 1 As a primer coating liquid, 2°2-bis(4
'-glyphyloxyphenyl) propane solution dissolved in ethyl cellosolve (fluorosurfactant "FC")
-400"A05" was used.As the base lens, the material of Example 1 was immersed in the mixed solution,
The coating was applied at a rate of 10 tones per minute and dried by heating at 110C for 5 minutes.

The climber-formed lens was prepared in Example 1 (6).
It was prepared under the same conditions as above, immersed in the coating solution, pulled up at a rate of 20 coats per minute, and cured by heating at 80C for 1 hour and at 150C for 1 hour. The evaluation was performed in the same manner as in Example 1. .

〔effect〕

As described above, when the primer of the present invention described above is applied to the long surface of a high refractive index plastic base material and then heated and dried, the thermosetting silicone ms+ is applied and heated to harden. It has now become possible to obtain a high refractive index plastic lens that has excellent effects such as abrasion resistance, hot water resistance, stable stainability, chemical resistance, weather resistance, and adhesion to the cured film layer.

In other words, the term "weakness" is a matter of literature, but strong eyeglasses and lenses are also thin, light, and crackable, and color lenses dyed in any color or larger size can expand the field of view and are fashionable. Rich lI! Mirror lenses are now possible, making it even better - JI
! It provides great results that meet the usage and demand.

that's all

Claims (3)

[Claims] (1) On the surface of a lens base material made of a copolymer mainly composed of polymerizable monomers represented by general formulas [I] and [II], a) acrylic acid or methacrylic acid ester and styrene are applied as a primer layer. A nonionic or anionic aqueous emulsion containing a copolymer as the main component is applied, and a thin film with a thickness of 0.1 to 2 μ obtained by drying or curing with heat is formed, followed by b) (A) described below. ,(B),
A high refractive index plastic lens comprising a cured layer of silicone resin having a thickness of 0.5 to 10 microns obtained by applying and thermally curing a coating composition consisting of (C) and (D). ▲There are mathematical formulas, chemical formulas, tables, etc.▼...[I] ▲There are mathematical formulas, chemical formulas, tables, etc.▼...[II] (In the formula, R^1 represents hydrogen or a methyl group,
X_2 is a halogen excluding fluorine, m and n each represent an integer, and m+n is 0 to 8. ) (A) General formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (In the formula, R^2 is a hydrocarbon group with 1 to 6 carbon atoms, a vinyl group,
an organic group having a methacryloxy group or an epoxy group, R
^3 is a hydrocarbon group with 1 to 4 carbon atoms, R^4 is a hydrocarbon group with 1 to 4 carbon atoms
(B) colloidal silica (C) with a particle size of 1 to 100 millimicrons; ) Polyfunctional epoxy compound (D) Magnesium perchlorate (2) In addition to the main components of the emulsion, one or more polymerizable monomers having a residue selected from a hydroxyl group, a carboxyl group, an amino group, an imino group, an amide group, and an epoxy group are added as a non-volatile component to 5% by weight. The high refractive index plastic lens according to claim 1, characterized in that the high refractive index plastic lens contains less than %. (3) The high refractive index plastic lens according to claim 1, wherein the emulsion is used after being diluted with an organic solvent before application.