JPH02308202A - Optical parts and production thereof and application device thereof - Google Patents

Abstract

PURPOSE:To obtain the optical parts of plastic moldings which are resin materials having a high refractive index and low viscosity and have an excellent adhesive characteristic to substrates consisting of transparent moldings by using a copolymer contg. at least one kind of acrylic and mehtacrylic resin compsns. and a specific vinyl monomer compd. at a specific ratio. CONSTITUTION:The plastic moldings consisting of the copolymer of at least one kind of the acrylic and methacrylic resin compsns. and the vinyl monomer compd. contain the compd. expressed by general formula (1) as the above- mentioned vinyl monomer compd. at 5 to 50% by weight. Since this material has the low viscosity and the high refractive index, the workability at the time of production is good and the production of the optical parts with high efficiency is possible. Since the high adhesiveness of the transparent molded substrates and the molded resin materials is maintained, the optical parts having high reliability are produced. Further, the optical parts are extremely low in hygroscopicity and are capable of maintaining the high reliability over along period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical component made of a plastic molded body, a method for manufacturing the same, and an application device thereof, and in particular, the present invention relates to an optical component made of a plastic molded body, a method for manufacturing the same, and an application device thereof. The present invention relates to an improved optical component made of a copolymer of a resin composition and a vinyl monomer compound, a method for manufacturing the same, and an apparatus for applying the same.

[Conventional technology]

Television projection screens as image display devices, general Fresnel lenses, general lenses, optical disk substrates,
In order to manufacture diffraction gratings and the like, a large number of optical components are formed by transferring from a matrix having an uneven surface or a certain curved surface.

Two typical methods are known for manufacturing this type of optical component, as shown below.

The first method, as shown in FIG. 4, is to inject the resin 4 from the injection port 3 into the space 2 formed by the matrix 1a and lb shown in step (a) as shown in step (b). This is a method of curing this resin with heat or energy rays, and then obtaining an optical component 5a made of a cured resin as shown in step (c).
al: J, Appl, PolymerSci,
241515 (1979), and JP-A-59-14
No. 1 can be mentioned.

In the second method, as schematically shown in FIG. 5, a photocurable resin 4 is placed in the space 2 between the transparent molded body 6 and the matrix 1c, and after curing this resin with energy rays, the matrix 1c is cured. An optical component 5 consisting of a transparent molded body 6 and a cured photocurable resin material 4 is obtained by peeling it off.
This is a method for obtaining b, and examples of this type of method include, for example, JP-A-53-86756 and JP-A-61-177215.
You can list the number etc.

[Problem to be solved by the invention]

The thermosetting or photocurable resin used in the first method and the photocurable resin used in the second method preferably have a high refractive index in order to improve efficiency as an optical component.
However, when conventional resin materials have a high refractive index, the viscosity of the resin increases and there is a tendency for crystallization, resulting in a decrease in workability.

In addition, the photocurable resin used in the second method needs to have adhesive properties with the transparent molded body, but conventional resin materials have poor adhesive properties and may not be able to form optical parts properly or at high temperatures or high temperatures. When this was used under humid conditions, there was a problem in that the transparent molded body and the cured photocurable resin material peeled off.

Therefore, an object of the present invention is to solve these problems of the prior art, and its first purpose is to achieve a high refractive index,
The second purpose is to create a plastic molded optical component that is made of a low viscosity resin material and has improved adhesive properties with a substrate made of a transparent molded body, and the third purpose is to create an optical application device using the same. The object of the present invention is to provide improved methods of manufacturing optical components.

[Means to solve the problem]

The above first object is as follows: (1) A plastic molded article consisting of a copolymer of at least one of acrylic and methacrylic resin compositions and a vinyl monomer compound, wherein the vinyl monomer compound is , the compound of the following general formula (1) in a weight ratio of 5 to
By optical components containing 50%.

General formula.

OR□ Here, R is -H or -CH.

R2 is -H, -Br, -CQ.

(2) At least one of acrylic and methacrylic resin compositions on a substrate made of a transparent molded body.

It is made by adhering a plastic molded body made of a copolymer with a vinyl monomer compound, and the vinyl monomer compound contains a compound of the following general formula (1) in a weight ratio of 5 to 50%.
Depending on the optical component containing the general formula, OR1, where R□ is -H or 10H.

R2 is -He B r r C12.

(3) The optical component according to (1) or (2) above, in which the plastic molded body constitutes an optical lens, and (4) the optical component according to (3) above, in which the optical lens constitutes a Fresnel lens. This is achieved using optical components.

The second object is achieved by (5) an image display device comprising a projection screen made of the optical components described in (3) or (4) above.

In other words, it is applied to an optical device that makes up a so-called projection screen that obtains an image by transmitting a video signal as light emitted from a projection type cathode ray tube to an image display screen, just like in a television, and it produces highly reliable images. A display device can be realized.

The third purpose is to: (6) treat a mixed composition containing at least one of acrylic and methacrylic resin compositions and a vinyl monomer compound with radiation including heat or light in the presence of a polymerization initiator; A method for manufacturing an optical component made of a plastic molded body of a predetermined shape by copolymerizing and curing by irradiating energy, using a compound of the following general formula (1) as the vinyl monomer compound, According to a method for producing a molded plastic optical component, which comprises containing this in the mixed composition in an amount of 5 to 50% by weight.

general formula, Here, R□ is -H or -CH.

R2 is -H, -Br, -CQ.

(7) Injecting a mixed composition containing at least one of acrylic and methacrylic resin compositions, a vinyl monomer compound, and a polymerization initiator into the matrix, and heating or The method comprises a step of copolymerizing and curing the resin composition and the vinyl monomer compound by irradiating radiation energy including light, and a step of peeling the cured product from the matrix. A method for producing a plastic optical component molded article, wherein a compound represented by the following general formula (1) is used as the vinyl monomer compound, and 5% of the total weight of the resin composition is used as the vinyl monomer compound. According to the method for producing a molded plastic optical component containing ~50% of the general formula.

　R1 Here, R1 is -H or -CH3゜ R2 is -H, -Br, -CQ.

(8) Between the substrate made of a transparent molded body and the matrix.

At least one of acrylic and methacrylic resin compositions
A step of injecting a mixed composition containing a seed, a vinyl monomer compound, and a polymerization initiator; and irradiating the mixed composition with radiation energy including heat or light, the resin composition and the vinyl A plastics optical component molded body is adhesively formed on the substrate made of the transparent molded body by copolymerizing the monomer compound and curing it, and peeling the cured product from the matrix. A method for producing an optical component comprising: a compound represented by the following general formula (1) as the vinyl monomer compound; % of the general formula.

　R1 Here, R8 is -H or -CHO R2 is -H, -Br, -CQ.

(9) The method for producing a plastic optical component molded article according to (7) or (8) above, wherein a mold corresponding to a predetermined lens surface shape is formed on the surface of the matrix, and (10) the matrix By the method for producing a plastic optical component molded article according to (9) above, wherein the lens surface shape formed on the surface of the mold has the surface shape of a Fresnel lens,
achieved.

[Effect]

Below, vinyl compound (1) and transparent molded substrate.

The acrylic and/or methacrylic resin composition, polymerization initiator, etc. will be explained in detail in turn.

1. Vinyl compound (1): The vinyl compound (1) becomes a liquid substance with low viscosity, and has a high refractive index and low water absorption. Compound (1) has an aromatic ring or a halogen atom in its molecule, which relatively reduces the amount of water-absorbing ester bonds, so after copolymerizing with an acrylic and/or methacrylic resin composition, However, this property is maintained, and as a result, a high refractive index and low water absorption of the plastic molded product are ensured.

R2 in compound (1) may be located at any of the ortho, meta, and para positions relative to the benzyl skeleton, but the meta position is the most attractive in order to disrupt the symmetry of one molecule and to maintain a liquid state even at low temperatures. This is followed by the ortho position and the rose position. In particular, compounds in which R2 is ortho-positioned on the benzyl skeleton are all liquid at room temperature and are easy-to-use materials.

In addition, compound (1) has the property of causing a transparent molded substrate such as plastic to swell to some extent.

The acrylic and/or methacrylic resin copolymer containing the compound (1) has the effect of improving adhesiveness with the transparent molded substrate.

As mentioned above, compound (1) has a content of 5 to 50% in the acrylic and/or methacrylic resin composition according to the present invention.
It is preferable to include wt%. If the amount of compound (1) is less than 51%, the characteristics of compound (1) described above cannot be fully exhibited, and if the -force ratio compound (1) is 50vt% or more, the acrylic and/or The viscosity of the methacrylic resin composition decreases too much, resulting in prolonged curing time, poor workability, and insufficient strength of the cured product. Therefore, as mentioned above, the content is preferably 5 to 50 wt%, more preferably 15 to 35 wt%.

2. Transparent molded substrate: Preferred transparent molded substrates having adhesive properties with the acrylic and/or methacrylic resin copolymer according to the present invention include, for example, primary transparent molded substrates.

Acrylic resins such as polymethyl methacrylate and polyethyl methacrylate; Polystyrene; copolymers of methyl methacrylate and styrene, copolymers of methyl methacrylate and butadiene, copolymers of styrene and acrylonitrile, copolymers of styrene and butadiene. Polymers, copolymers of styrene and isoprene; polycarbonates; cellulose derivatives such as cellulose acetate and cellulose acetate butyrate; polyvinyl chloride. Among these, acrylic resins, copolymers of methyl methacrylate and styrene, polycarbonates, and cellulose derivatives are common.

In particular, polymethyl methacrylate, copolymers of methyl methacrylate and styrene, and copolymers of methyl methacrylate and butadiene are excellent because they have high transparency, low optical distortion, and low light absorption. .

3. Acrylic and/or methacrylic resin composition: In the acrylic and/or methacrylic resin composition according to the present invention, the materials combined with compound (1) are:
Any compound having one or more acrylic or methacrylic groups in its molecule and capable of radical polymerization using a polymerization initiator may be used. For example, the following compounds are useful. Among these, those with excellent polymerizability include:
Compounds having two or more functionalities are preferred. Further, those having a phenyl nucleus in one molecule are more preferable because of their high refractive index.

(i) Monofunctional monomer: Phenyl acrylate or methacrylate.

2-phenoxyethyl acrylate or methacrylate, 2-phenoxyethyl acrylate or methacrylate, 2-phenoxypropyl acrylate or methacrylate, cyclohexyl acrylate or methacrylate, polkylacrylate or methacrylate, isobornyl acrylate or methacrylate,
Dicyclopentenyl acrylate or methacrylate, tricyclodecanyl acrylate or methacrylate.

(n) Bifunctional monomer: Bisphenol A diglycidyl ether diacrylate or dimethacrylate, bisphenol F diglycidyl ether diacrylate or dimethacrylate, compound of the following general formula (2), ... (2) where R1, R,,R,: -H or -CH.

n: an integer of 1 to 4 or less Margin Urethane acrylate or methacrylate compound of general formula (3) or general formula (4).

Here, R1: -H or -CH□R,: -H
, -CH, or -C,H.

CH.

An acrylate or methacrylate compound of general formula (5), (5) where R1: -H or -CH.

m: an integer of 1 to 4 neopentyl glycol diacrylate or methacrylate, 1,6-hexanediol acrylate or dimethacrylate, 1,10-decanediol acrylate or dimethacrylate, etc.

(in) Polyfunctional monomer: pentaerythritol tetraacrylate or tetramethacrylate, dipentaerythritol hexaacrylate or hexamethacrylate, etc.

4. Polymerization initiator: The polymerization initiator used in the acrylic and/or methacrylic resin composition of the present invention is preferably a photopolymerization initiator that generates radicals when exposed to light and initiates radical polymerization of acrylic or methacrylic groups. For example, a primary polymerization initiator can be mentioned, but depending on the purpose, a thermal polymerization initiator can also be used.

Benzyl compounds such as benzyl and methyl-〇-benzoate; Benzoins such as benzoin, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether; Benzophenones such as benzophenone and 4-methoxybenzophenone; Acetophenone and 2-2-jethoxyacetophenone Acetophenones such as 2-chlorothioxanthone, anthraquinones such as 2-methylthioxanthone; benzyl methyl ketal, 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1 -(4-isopropylphenyl)-2-hydroxy-2-methylpropan-1-one, etc., and these may be used alone or in combination of two or more. Among these, particularly preferred are benzoin isopropyl ether, benzoin isobutyl ether, benzyl methyl ketal, 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one. , 1-(4-isopropylphenyl)-2-hydroxy-2-methylpropane-1-
On, etc.

The preferred amount of the polymerization initiator added is 0.5 to 3 vt% based on the total of the acrylic and/or methacrylic resin composition and the vinyl compound (1), which are the raw material composition of the copolymer.
is practical.

In this way, the acrylic and/or methacrylic resin composition according to the present invention and the vinyl compound (1) can be easily copolymerized in the presence of a polymerization initiator.
The obtained copolymer molded product is crosslinked to have a network structure.

〔Example〕

Next, examples of the present invention will be described in detail.

Example 1 (i) Preparation of vinyl compound (1); A benzyl alcohol derivative and methacrylic acid were reacted to obtain the following methacrylic ester (compound 1).

In addition, R1 in parentheses written in the general formula of each compound,
R, is a representation of the contents of general formula (1) in duplicate for ease of understanding.

(R,: -CH,, R,: -Cm) (R1: -C
H3, R,: -Br) (R□: cHs, R, knee o
@) (R,: -CH,,R,:ya) (n) Preparation of acrylic compound represented by general formula (2); In addition, the following compound F was separately prepared as an acrylic compound.

False...(F) [In general formula (2), R□knee H2R, knee H, R
, Ni CH,, n = 2] (ni) Synthesis of copolymer; Compound F was blended with the above compounds A to E, and 1-4-(isopropylphenyl)-2-hydroxy was added as a photoinitiator. After adding 2 wt% of -2-methylpropan-1-one, the viscosity of each composition at 25°C was measured.

This composition was sandwiched between two glass plates with a thickness of In+m so that the composition had a thickness of 1 mm, and
After photocuring at 120° C. for 1 hour, post-curing was performed.

(iv) Results; The results of the refractive index and viscosity of each cured product measured at a wavelength of 589.3 nm are shown in FIG.

In the same figure, the 0 mark F indicates the relationship between the viscosity and the refractive index of the cured product when it consists only of the compound of the above general formula (F), and the * mark indicates the relationship between A to E of compound (1) only. Δ, ◇
The marks are 20wt% and 50wt% of compounds A to E, respectively.
The relationship between the viscosity of the mixed composition and the refractive index of the cured product is similarly shown.

As is clear from this figure, the acrylic compound (compound F
), when compound (1) A-E according to the present invention is added, the viscosity of the composition decreases and the refractive index improves.

Generally, when manufacturing optical components in resin casting or replica production processes, workability is important.

The fluidity of the resin is good, and the viscosity of the liquid is 50 to 500c, which does not cause liquid leakage from the mold material or involve air bubbles.
p is appropriate. In addition, in order to improve the efficiency of optical components, it is preferable that the refractive index is as large as possible, but at least 1.55
More than this is often required.

From this point of view, the resin composition of FIG.
It can be seen that by adding compound (1) A-E to the resin material, desirable characteristics as a resin material for optical components can be realized.

Although compound (1) cannot be used alone as an optical component, it is desirable that the amount of compound (1) added be 50% or less due to reasons such as low viscosity and poor curability.

Comparative Examples 1 to 5, Examples 2 to 14 First, Comparative Examples 1 to 5, none of which contain compound (1), will be illustrated, and then Example 2, which contains an appropriate amount of compound (1).
~ ] 4 will be explained. Table 1 shows the composition of the component materials, the resulting viscosity characteristics (composition before curing), and the refractive index of the cured product after curing for each comparative example and example.

Comparative example 1 diethylene glycol bisallyl carbonate 98.3
g of di-isopropyl peroxycarbonate 2.7
g was added and dissolved, and the viscosity at 25°C was measured.

Furthermore, this composition was heated at 50°C for 1 h + 100"C for 1 h.
The refractive index of the cured product was measured at a wavelength of 589 nm and 3 nm. The results are shown in Table 1.
The viscosity is as low as 17 cp, and the refractive index of the cured product is 1.4.
5, which was extremely low.

Comparative Examples 2 to 5: As shown in Table 1, 2 g of photopolymerization initiator 1-hydroxycyclohexylphenyl ketone was added to 98 g of acrylic or methacrylic compound monomer without containing compound (1). It was added and dissolved, and the viscosity at 25°C was measured. This composition was sandwiched between glass plates with a thickness of 1 mm so that the thickness of the composition was 1 mm, and a high-pressure mercury lamp (wavelength 3
Light intensity 150o+W/am” at 65nm,
After photocuring for 30 seconds), leave it at 120°C for 1 hour.
Post-curing was performed, and the refractive index of each cured product was measured at a wavelength of 589.3 nm. As can be seen from Table 1, the results showed that the viscosity of the composition before curing was abnormally high (Comparative Examples 2.3.
5) There is a problem that the refractive index of the cured product after curing is too small (Comparative Example 4).

Examples 2 to 14: The composition of the component substances was blended as shown in Table 1, and the above Comparative Example 2
The viscosity of the composition before curing and the refractive index of the cured product after curing were measured in the same manner as in 5. As a result, the viscosity of the composition was 30 to 300 cp (25°C), which is preferable for practical use, and the refractive index was 1.56 or more (1.62 in Example 9), which is the goal for plastics for optical components. The level (1,55) was fully satisfied.

Conventionally, when trying to obtain a composition with a high refractive index, the viscosity of the composition before curing tended to become abnormally high, but in this example, workability was significantly improved with a moderate viscosity.

Below is a blank space Example 15 In contrast to the acrylic compound (F) of Example 1, the compound (
30% by weight of each of A to E in 1) was blended, and a photopolymerization initiator 1-(4-propylphenyl)-2 was further added to these.
Five types of photocurable resin compositions containing 2% by weight of -hydroxy-2-methylpropan-1-one were prepared.

As illustrated in Fig. 4, 970 x 730 x 1
The previously prepared photocurable resin 4 was injected into the spaces 2 of the master molds 1a and 1b, in which a mold with a brass Fresnel lens pattern of the same area as a quartz glass plate of 0 mm was arranged in parallel with an interval of 3III11. . Light intensity 100 with a metal halide lamp (wavelength 365 nm) from the side of the quartz glass plate
mW/cm'' for 1 minute to photocure the injected resin, forming a matrix 1a consisting of a quartz glass plate and a mold.

1b and optical component 5 made of a cured photocurable resin.
A Fresnel plate as b was obtained. This plate was placed on a general glass plate with its Fresnel side facing up, and heat treated at 80°C for 1 hour.

Fresnel plates were manufactured using each of the above five types of photocurable resins, and the warpage was within 0911 m per 100 mm of plate width. Also, the surface of the Fresnel plate has a Fresnel pitch of 0.
．． The serrated cross section of 11 mm was transferred more accurately than the master mold.

In this Fresnel plate, when the input focus was 859+nm, the output focus was 980011I11, and the focus variation could be kept within 10% of the target. Further, in molding the Fresnel plate, workability was good because the composition had an appropriate viscosity, similar to Example 1.

In the example of Example 1, the projection screen of the image display device is
The Fresnel plate obtained in step 5 is used.

As shown in FIG. 2(a), a projection type television 11 consisting of one light emitting tube (projection type cathode ray tube) 7, a lens 8, a mirror 9, and a screen 10 is prepared.
Of these, the front plate 12 was prepared in advance, and the Fresnel plate 13 previously prepared in this example was used.

FIG. 2(b) shows an enlarged cross-sectional view of the screen 10. FIG. As a result of a practical test of a projection television, no one color shift or image distortion was observed, confirming that the Fresnel plate according to the present invention can be fully put to practical use. Also.

This projection television has a temperature of 100℃ at 40℃ and 95%RH.
No abnormality was observed in the image even after leaving it for 0 hours.

Example 17 Compound (F) of Example 1 was treated with compound A and compound (D) as compound (1) in a stepwise manner (0, 5, 1).
0,20,30,40% by weight), and to these, 2% by weight of the photopolymerization initiator 1-(4-propylphenyl)-2-hydroxy-2-methylpropan-1-one was added,
Eleven types of photocurable resin compositions were prepared.

Methyl methacrylate-styrene copolymer with a thickness of 5 mm (
A transparent plate (20×60 mm) of styrene (60% by weight) was prepared as a transparent molded substrate. These two transparent plates were bonded together using the photocurable resin composition prepared as described above (adhesion area: 1 cm", thickness of the photocurable resin composition: 200 uIm), and this was heated at 40°C for 10 minutes. After leaving it for a minute, use a high-pressure mercury lamp (wavelength 365 nm) with a light intensity of 50 mW.
/cm2 for 30 seconds to photocure this resin composition to prepare an adhesive test piece.

What is the adhesive strength between the transparent plate and the photocurable resin composition?

As shown in FIG. 3, compound (1) (here, compound A
Alternatively, the performance improves as the amount of compound D) increases. When the amount of compound (1) in the resin composition exceeds 10% by weight, the state at the time of failure changes from interfacial failure between the transparent plate and the resin composition to cohesive failure of the transparent plate or the resin composition, resulting in poor adhesion between the two. is sufficient.

The reason why the adhesive strength is improved in this way is considered to be that the compound (1) penetrates into the surface of the transparent plate, and peeling does not occur at the interface between the transparent plate and the photocurable resin.

The adhesive strength between a mold material such as brass and a photocurable resin composition is approximately 20 kg/cm, so in order to accurately make a replica and eliminate resin residue on the mold, it is necessary to use a transparent plate and a photocurable resin composition. What is the adhesive strength with the resin composition?

It is desirable that the weight is 60 kg/cm” or more.

Example 18 30% by weight of each of Compounds A to E as Compound (1) was blended with Compound (F) of Example (1), and a photopolymerization initiator 1-(4-propylphenyl) was added to these.
-2-hydroxy-2-methylpropan-1-one 2
Five types of photocurable resin compositions were prepared in which the weight percentage was added.

As illustrated in Figure 5, 970 x 740 x 3
A transparent molded substrate 6 made of methyl methacrylate-styrene copolymer of +m and a brass Fresnel patterned mother mold 1c having the same area were prepared, and the mother mold 1c was kept warm at 40°C.

After injecting the previously prepared photocurable resin composition 4 into the space 2 between the substrate 6 and the matrix 1c to a thickness of approximately 200 nm, the light intensity was increased from the substrate 6 side using a high-pressure mercury lamp (wavelength 365 nm). 50+*W/cm'' for 30 seconds to photocure the resin composition 4. When force was applied between the substrate 6 and the matrix 1c, the matrix 1c and the photocurable resin cured product 4 were bonded together. The photocurable resin composition 4 is peeled off from the transparent molded body substrate 6.
A Fresnel plate serving as the optical component 5b to which was attached was obtained.

On the other hand, for comparison, when we attempted to produce a Fresnel board using a photocurable composition consisting only of compound (F) and a photopolymerization initiator, the photocurable resin adhered to the matrix, resulting in a normal condition. A Fresnel board could not be obtained.

Introducing compound (1) in this way also improves the releasability from the mold.

In addition, A-E of acrylic compound (F) and compound (1)
The Fresnel plate using a photocurable resin composition in combination with the above had a Fresnel surface that accurately transferred the irregularities of the matrix, and the warpage per plate @100n+o+ was within 0.1 m+++. Also, the surface of the Fresnel plate has a Fresnel pitch of 0.
The serrated cross section of 11 mm was transferred more accurately than the master mold.

This Fresnel plate had an output focus of 9800+s+a when the input focus was 859m+++, and the focus variation could be kept within 5%, which sufficiently met the target of 10%.

When this Fresnel plate was used as a Fresnel plate for a projection television screen as shown in FIG. 2, no color shift or image distortion was observed, and it was confirmed that it could be satisfactorily put to practical use. In addition, this television has a temperature of 40℃95%RH.
No abnormality was observed in the image even after leaving it for 1'000 hours.

When the Fresnel sheet was taken out from this television and the adhesive strength between the transparent molded body and the cured photocurable resin was measured, it was found to be over 70 kg/cm'', and there was no change compared to the adhesive strength before moisture absorption treatment. I was not able to admit.

〔Effect of the invention〕

As described above, according to the present invention, optical components with low viscosity and high refractive index can be manufactured with good workability and high efficiency. Furthermore, since the adhesiveness between the transparent molded substrate and the molded resin material is highly ensured, highly reliable optical components can be manufactured. Furthermore, the optical component according to the present invention has extremely low hygroscopicity and can maintain high reliability over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a characteristic diagram showing the relationship between the viscosity of the liquid resin material according to the present invention and the refractive index of its cured product, and FIG. 2 is a schematic diagram illustrating a projection television to which the Fresnel plate according to the present invention is applied. Figures 3 and 3 are characteristic diagrams showing the adhesive strength between the transparent molded substrate and the molded resin material according to the present invention, and Figures 4 and 5 are
Each is a manufacturing process diagram of the optical component. ia, 11)...Mother mold 2...Space 3...Injection port 4...Resin material 5a, 5b...Optical component 6...Transparent molded body substrate 7...Light emitting tube 8. ...Lens 9...Mirror 10
...Screen 11...Projection television 12...Front board 13...Fresnel board Patent attorney Junnosuke Nakamura Figure 1 Figure 2 Figure 3 1-1--Motor 2-- -4 darkness 3-111 Udo entrance 4----, 1 "monthly drying material 5-111 school part 4 figure 5

Claims (1)

[Scope of Claims] 1. A plastic molded article consisting of a copolymer of at least one of acrylic and methacrylic resin compositions and a vinyl monomer compound, wherein the vinyl monomer compound is the following: of the compound of general formula (1) in a weight ratio of 5 to 5
Optical components containing 0%. General formula, ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(1) Here, R_1 is -H or -CH_3, R_2 is -H, -Br, -Cl, ▲There are mathematical formulas, chemical formulas, tables, etc.▼, Or ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ 2. A plastic film made of a copolymer of at least one of acrylic and methacrylic resin compositions and a vinyl monomer compound is placed on a substrate made of a transparent molded body. An optical component formed by adhering a molded article and containing 5 to 50% by weight of a compound represented by the following general formula (1) as the vinyl monomer compound. General formula. ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(1) Here, R_1 is -H or -CH_3, R_2 is -H, -Br, -Cl, ▲There are mathematical formulas, chemical formulas, tables, etc.▼ or ▲Mathematical formula , chemical formula, table, etc.▼ 3. The optical component according to claim 1 or 2, wherein the plastic molded body constitutes an optical lens. 4. The optical component according to claim 3, wherein the optical lens constitutes a Fresnel lens. 5. An image display device comprising a projection screen made of the optical component according to claim 3 or 4. 6. A mixed composition containing at least one of acrylic and methacrylic resin compositions and a vinyl monomer compound,
A method for producing an optical component made of a plastic molded article of a predetermined shape by copolymerizing and curing by irradiating radiation energy including heat or light in the presence of a polymerization initiator, the vinyl monomer compound The following general formula (
1. A method for producing a molded plastic optical component, which comprises using the compound of 1) and containing it in the mixed composition in an amount of 5 to 50% by weight. General formula. ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(1) Here, R_1 is -H or -CH_3, R_2 is -H, -Br, -Cl, ▲There are mathematical formulas, chemical formulas, tables, etc.▼ or ▲Mathematical formula , chemical formulas, tables, etc.▼ 7. Injecting into the matrix a mixed composition containing at least one of acrylic and methacrylic resin compositions, a vinyl monomer compound, and a polymerization initiator; A step of copolymerizing and curing the resin composition and the vinyl monomer compound by irradiating the mixed composition with radiation energy including heat or light, and peeling off the cured product from the matrix. A method for producing a molded plastic optical component comprising the steps of: using a compound represented by the following general formula (1) as the vinyl monomer compound, and adding it to the resin composition in a weight ratio. A method for producing a molded plastic optical component comprising 5 to 50% of the total 100% of the above. General formula, ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(1) Here, R_1 is -H or -CH_3, R_2 is -H, -Br, -Cl, ▲There are mathematical formulas, chemical formulas, tables, etc.▼, or ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ 8. At least one of acrylic and methacrylic resin compositions, a vinyl monomer compound, and polymerization initiation and irradiating the mixed composition with radiation energy including heat or light, thereby copolymerizing and curing the resin composition and the vinyl monomer compound. and a step of peeling the cured product from the matrix to form a plastic optical component molded body on a substrate made of the transparent molded body, the method comprising the steps of: As a vinyl monomer compound, the following general formula (1
2.) A method for producing a plastic optical component molded article, which contains the compound in an amount of 5 to 50% by weight in 100% of the total weight of the resin composition. General formula, ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(1) Here, R_1 is -H or -CH_3, R_2 is -H, -Br, -Cl, ▲There are mathematical formulas, chemical formulas, tables, etc.▼, or ▲ Numerical formulas, chemical formulas, tables, etc. ▼ 9. The method for producing a molded plastic optical component according to claim 7 or 8, wherein a mold corresponding to a predetermined lens surface shape is formed on the surface of the matrix. 10. The lens surface shape formed on the surface of the matrix is
10. The method for producing a molded plastic optical component according to claim 9, wherein the molded plastic optical component has a surface shape of a Fresnel lens.