KR20220008695A - Lens to block ultraviolet rays perfectly - Google Patents

Abstract

The objective of the present invention is to provide a perfect UV protection lens capable of blocking a wavelength of the ultraviolet region that has the wavelength of 400 nm and some blue light so as to reduce glaring and eye fatigue. The present invention relates to a mixed composition and a manfucaturing method thereof, wherein the mixed composition comprises: a monomer which contains an episulfide-based compound having a high refractive index and Abbe's number as well as excellent heat resistance and transparency as a main raw material; a perfect UV absorber mixed with a monomer and composed of a Benzotriazol-based compound to block more than 99.5% of UV rays with a wavelength of 400 nm or less that pass through the lens; a catalyst mixed with the monomer to cure the monomer and produce a polymer; and a discoloration blocking agent mixed to prevent yellowing that occurs in lenses when converted to polymer by the catalyst. Accordingly, the perfect UV protection lens mixed to be formed and manufactured thereby has a number of effects of perfectly blocking the wavelength of the ultraviolet region with a wavelength of 400 nm or less by more than 99.5% and partially blocking blue light in the short wavelength region of 380-500 nm so as to perfectly protect eyes from ultraviolet rays which are extremely harmful to the eyes. In addition, the perfect UV protection lens protects eyes from blue light that causes dry eyes and eye fatigue or damages the eye lens and prevents glaring, eye fatigue and various eye diseases caused by the ultraviolet rays and blue light so as to improve the health of the eyes.

Description

Perfect UV blocking lens {Lens to block ultraviolet rays perfectly}

The present invention relates to a UV blocking lens, and to explain this in more detail, it is a perfect UV blocking lens to reduce glare and eye fatigue by blocking some blue light while almost perfectly blocking the wavelength of the UV region of 400 nm or less. it's about

In general, electromagnetic waves with long wavelengths such as green and red parts of visible light, infrared rays, microwaves, and radio waves are not very harmful to the human body, especially the eyes. In the case of ultraviolet and electromagnetic waves with short wavelengths such as X-rays and gamma rays, they have an extremely harmful effect on the human body. There is almost no harmful effect, and UV-C at 100-280 nm and UV-B at 280-320 nm are almost absorbed by the atmospheric ozone layer, and some of the unabsorbed UV-B and UV-A at 320-400 nm are It was not absorbed by the ozone layer and was irradiated to the ground. Recently, due to the destruction of the ozone layer due to air pollution, a large amount of UV light has reached the ground and the harmfulness to the human body is increasing. (ultraviolet) and blue light having a wavelength of 380 to 500 nm that emits blue light in visible light while overlapping with the ultraviolet light is included in sunlight, so in order to protect the eyes, especially in the human body, glasses that block ultraviolet light and blue light, etc. It is beneficial to wear this, and a number of sunglasses or UV-only blocking lenses that block these UV rays have been developed. In particular, blue light is recognized as having a lower risk than UV light, but such blue light has a so-called short wavelength. It is also called, because the wavelength is short and it is focused on the front of the retina, so it is not recognized as an accurate image, so it causes eye fatigue because the color is dispersed. Also, the shorter the wavelength, the higher the energy. It had the problem of exacerbating glare and eye fatigue by stimulating it. For this purpose, a bright light source such as a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED) is used. Their eyesight was inevitably deteriorated sharply compared to before.

Accordingly, technologies have been developed to protect the eyes by reflecting and absorbing blue light in ultraviolet or visible light harmful to the human body and eyes as described above. When manufacturing a lens as in Korean Patent Publication No. 7001894 (published on November 5, 1988) of the prior art literature, a polarizing film with an integrated cut-on filter is attached or immersed in a coloring dye at high temperature to produce ultraviolet rays And a plastic resin film containing silver and halogen elements that absorbs blue light or changes color and color density depending on the amount of ultraviolet light on the lens surface of glasses as in Republic of Korea Utility Model Registration No. 230630 (announced on July 19, 2001) Alternatively, a polarizing film was formed alone or in combination to absorb and block ultraviolet and short-wavelength visible light. However, these prior art techniques provide color to the lens itself to absorb ultraviolet light and short-wavelength blue light within visible light, so the polarization of the lens By attaching the film and coloring with dye, even visible light that is not harmful to the human body other than ultraviolet and blue light is absorbed, so the original color is not visible and there are many changes in color and color density. It also reduces the transmittance of long wavelengths with a wavelength of 500 to 780 nm, which is the green or red part, which is not used. In the case of the polarizing film attached to the lens, frequent peeling and scratches occur, and in the case of the dye used for coloring the lens, there are many points to be noted for handling, and when the dye is colored on the lens, it has a standardized color concentration. Since it was very difficult to manufacture the lens, it had various problems in manufacturing.

In addition, as disclosed in Republic of Korea Patent Publication No. 85415 (published on July 29, 2013), a high refractive index material and a low refractive index material are applied to the surface of a plastic substrate to solve the problem of conventional lenses that block ultraviolet or blue light. There is a known technique in which a multilayer film stacked in a plurality is provided, and a functional thin film is laminated between the plastic substrate and the multilayer film. it had

As mentioned above, functional spectacle lenses that block both ultraviolet and blue light have been continuously developed in recent years, but most lenses effectively block short-wavelength ultraviolet rays of 380 nm or less, but the absorption performance of long-wavelength ultraviolet rays of 380-400 nm is poor. The UV transmittance of 380 ~ 400 nm is significantly lowered, and there is a problem harmful to the eyes. It also had problems.

In order to solve the above problems, as disclosed in Korean Patent Registration No. 1612940 (announcement dated April 15, 2016), it is possible to block both the wavelength of the ultraviolet region that is extremely harmful to the eyes and the blue light that is the wavelength of the short wavelength region, thereby reducing glare and The inventor of the present invention first developed a technology to prevent fatigue and eye disease, and was registered after applying for a patent. To block UV and blue light at the same time, the transmittance of blue light was low, so a large amount of blue part was blocked from the original color, so it was not possible to obtain natural color. It has a number of problems, such as changing the color of the lens to blue because the blue pigment is excessively mixed to change the color of the lens to blue, thereby reducing the overall transmittance.

KR 10-1988-7001894 A 1988. 11. 5. KR 20-0230630 Y1 2001. 7. 19. KR 10-2013-0085415 A 2013. 7. 29. KR 10-1612940 B1 2016. 4. 15.

In the present invention, a new technology was created to solve the problems of the prior art, and the present invention is to perfectly block the wavelength of the ultraviolet region of 400 nm or less, and the main purpose is to protect the eyes from ultraviolet rays. This is to provide a perfect UV blocking lens.

In addition, the present invention perfectly blocks ultraviolet rays while also partially blocking the blue light portion of the short wavelength region of 380 to 500 nm to prevent deterioration of eyesight or eye diseases caused by not only ultraviolet light but also blue light.

In addition, although not separately described, other objects within the range that can be inferred in consideration of the specific content and claims and drawings for carrying out the following invention, which describe the perfect UV blocking lens of the present invention in detail, are also will be included in the solution.

In the present invention, a perfect UV blocking lens is constituted as a specific means for solving the problems of the present invention, but the perfect UV blocking lens of the present invention has high refractive index and Abbe's number, and is an episulfide-based compound excellent in heat resistance and transparency. A monomer as a main raw material is provided, and a perfect UV absorber composed of a benzotriazole-based compound is mixed with the monomer of the episulfide-based compound to block 99.5% or more of ultraviolet rays of 400 nm or less that pass through the lens. In addition to this, a catalyst that is mixed with the monomer is further provided to cure the monomer to produce a polymer, and a perfect UV absorber is mixed with the monomer to prevent yellowing that occurs in the lens when converted to a polymer by the catalyst It is characterized in that a discoloration blocking agent to be mixed is further provided.

The monomer is a monomer A consisting of bis (2,3-epithiopropyl) disulfide and 2,2'-thiodiethanethiol (2,2'-Thiodiethanethiol) It may be characterized in that the monomer B consisting of and the monomer C consisting of sulfur are mixed in a weight ratio of 17:1:2.

The perfect UV absorber may be characterized in that it consists of 2-(2-butoxy-2-hydroxyphenyl)-2h-benzotriazole (2-(2-butoxy-2-hydroxyphenyl)-2H-benzotriazole). .

The catalyst is a first catalyst consisting of 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate (1,2,2,6,6-Pentamethyl-4-piperidyl Methacrylate); It may be characterized in that the second catalyst made of butyltin dichloride and the third catalyst made of benzyltriethylammonium chloride are mixed in a weight ratio of 1:10:5.

The discoloration blocking agent is 1-hydroxy-4-(p-toluidino)anthraquinone (1-Hydroxy-4-p-) which is a blue dye made to neutralize the yellowing phenomenon of the lens with blue light. toluidinoanthraquinone) and 3H-dibenz[f,ij]isoquinoline-2,7-dione, 3-methyl-6-[( 4-methylphenyl)amino]-(3H-Dibenz[f,ij]isoquinoline-2,7-dione, 3-methyl-6-[(4-methylphenyl)amino]-) was mixed in a weight ratio of 35:9 can be characterized as

In this case, 0.015 to 0.045 parts by weight of the first catalyst and 0.015 to 0.045 parts by weight of the first catalyst based on 100 parts by weight of the monomer consisting of 76.5 to 93.5 wt% of monomer A, 4.75 to 5.25 wt% of monomer B, and 9.75 to 10.25 wt% of monomer C 0.15 to 0.45 parts by weight of the catalyst, 0.075 to 0.225 parts by weight of the third catalyst, 0.02 to 3 parts by weight of the perfect UV absorber, and 0.3675×0 ^-4 to 0.6825×0 ^-4 parts by weight of a blue dye as a discoloration blocking agent And, as a discoloration blocking agent, 0.0945×0 ^-4 to 0.1755×0 ^-4 parts by weight of red dye (RED Dye) may be characterized in that the composition is mixed.

The manufacturing method of the perfect UV blocking lens of the present invention causes a curing action on monomer B consisting of 2,2'-thiodiethanethiol among monomers, which are raw materials for plastic spectacle lenses molded in a mold. The first catalyst consisting of 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate (1,2,2,6,6-Pentamethyl-4-piperidyl Methacrylate) for making a polymer is the only The first single catalyst stirring step of stirring for 20 minutes is introduced, and a monomer composed of 2,2'-thiodiethanethiol among monomers, which is a raw material for plastic spectacle lenses molded in a mold. A second catalyst consisting of dibutyltin dichloride and a third catalyst consisting of benzyltriethylammonium chloride to cause a hardening action to B to make a polymer are mixed and stirred for 100 minutes. Monomer A and sulfur composed of bis(2,3-epithiopropyl)disulfide among monomers that are raw materials for plastic spectacle lenses molded in a mold through a secondary complex catalyst stirring step Monomer C made of (sulfur) is put into a reaction vessel and undergoes a complex monomer mixing step to be mixed, and 2-(2-butoxy-2-hydroxyphenyl )-2h-benzotriazole (2-(2-butoxy-2-hydroxyphenyl)-2H-benzotriazole) is put in a perfect UV absorber, and the UV absorber is stirred at 30° C. for 40 minutes.

Thereafter, the single catalyst mixture in which the first catalyst prepared through the first single catalyst stirring step is mixed is added to the reaction vessel containing the complex monomer mixture prepared through the ultraviolet absorber stirring step, and stirred at 30° C. for 40 minutes to mix A single catalyst complex monomer mixing step is performed, and the mixture prepared through the single catalyst complex monomer mixing step is vacuum stabilized under reduced pressure at a pressure of 10 torr lower than atmospheric pressure (760 torr) in a reaction vessel to stabilize the mixture. , a complex catalyst mixture in which a second catalyst and a third catalyst, which are prepared through a secondary complex catalyst stirring step, are mixed into the mixture that has undergone the vacuum stabilization step, and stirred at a pressure of 10 torr lower than atmospheric pressure at 30° C. for 10 minutes It is characterized in that it is manufactured through a mold injection step in which the composition is filtered through a filter having a pore size of 1 μm and injected into the mold after the vacuum state is released and nitrogen is introduced through the entire mixing step of the mixed catalyst.

According to the specific means for solving the above problems, the perfect UV blocking lens of the present invention is made by mixing a special light stabilizer (= perfect UV absorber) with a monomer to manufacture spectacle lenses, and the wavelength in the UV region of 400 nm or less is 99.5% or more. It provides a perfect blocking effect, and in addition, partial blocking of blue light (= blue light) in the short wavelength region of 380 to 500 nm is made together to provide the effect of perfectly protecting the eyes from ultraviolet rays that are extremely harmful to the eyes. Protects the eyes from blue light, which is emitted in large amounts from smartphones and TVs, which also causes dry, fatigue, or damage to the lens, and prevents glare and eye fatigue and various eye diseases caused by the ultraviolet and blue light. It will provide the effect of improving the health of the eyes.

In addition, according to the present invention, the yellowing phenomenon in which the lens appears yellow by the composition mixed with the monomer for blocking ultraviolet rays is made transparent with only a very small amount of pigment to prevent the yellowing phenomenon and discolor the object to a specific color It is an invention with many expected effects, such as providing the effect of maximizing the transmittance of visible light while making it invisible.

1 is a graph comparing transmittance for each wavelength band of a conventional conventional lens and a perfect UV blocking lens of the present invention;
2 is a table comparing the specifications of the conventional general lens and the perfect UV blocking lens of the present invention;
3 is a table showing the blocking rate for each wavelength band of the perfect UV blocking lens of the present invention;
4 is a working process diagram showing a method of manufacturing a perfect UV blocking lens of the present invention;

The present invention is to provide a perfect UV blocking lens to reduce glare and eye fatigue by blocking some blue light while almost perfectly blocking the wavelength of the ultraviolet region of 400 nm or less, which together with the drawings in the following In order to be described in more detail, the accompanying drawings are only examples for easily explaining the content and scope of the technical idea of the present invention, and are not limited thereto, and the terms used are also only for specifically describing the embodiments. It should not be construed as being limited to terminology.

The perfect UV blocking lens of the present invention is not a method of coating a UV blocking material on the surface of a conventional lens or attaching a UV blocking film, but a UV absorber that absorbs and blocks UV rays with a monomer which is a raw material of the lens. In order to form The organic compound, Episulfide-based compound, is made as a main raw material, and the UV absorber mixed with the monomer of the Episulfide-based compound blocks UV rays of 400 nm or less that pass through the lens to 99.5% or more, thereby perfecting UV rays. It is made of a benzotriazole-based compound, which is called a perfect UV absorber by itself to block absorption.

In addition, in the perfect UV blocking lens of the present invention, a catalyst for curing the monomer made of the episulfide-based compound to produce a polymer is further mixed. In order to block the yellowing phenomenon that occurs in the lens when it is converted into a polymer by a catalyst by mixing it, a discoloration blocking agent may be further mixed.

Looking at the composition of the perfect UV blocking lens of the present invention in more detail, first, the monomer having an episulfide-based compound as a main raw material is bis(2,3-epithiopropyl)disulfide (Bis(2,3-epithiopropyl) Monomer A consisting of disulfide, monomer B consisting of 2,2'-thiodiethanethiol, and monomer C consisting of sulfur are mixed in a weight ratio of 17:1:2, , When each content is increased in the mixing ratio of monomer A, monomer B, and monomer C, the refractive index when molding into a lens becomes extremely high. to mix.

In this case, the catalyst is a polymerization initiator that induces a reaction that cures the monomer to form a polymer, and the catalyst is 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate (1,2,2 A first catalyst consisting of ,6,6-Pentamethyl-4-piperidyl Methacrylate, a second catalyst consisting of dibutyltin dichloride, and a third catalyst consisting of benzyltriethylammonium chloride It is mixed in a weight ratio of 1:10:5, and when the content of each of the first catalyst, second catalyst, and third catalyst increases in this mixing ratio, the lens becomes hard after conversion to polymer, and hard coating or multi-coating, etc. The coating property of the lens is not good, and when the content of each is lowered, the lens becomes brittle, and this also has a problem that the coating property of the lens is not good in the future.

In the present invention, the perfect UV absorber comprising a benzotriazole-based compound mixed with the monomer is 2-(2-butoxy-2-hydroxyphenyl)-2h-benzotriazole (2-(2-butoxy-2-hydroxyphenyl) -2H-benzotriazole), and this 2-(2-butoxy-2-hydroxyphenyl)-2h-benzotriazole is

In this case, N is nitrogen, H is hydrogen, O is oxygen, and figures without letters (hexagons, etc.) show the connection of carbon, C.

When the content of the perfect UV absorber mixed in the monomer increases, the yellowing phenomenon in which the color of the lens becomes yellowish becomes strong, and the strength of the lens decreases. do.

In addition, in the present invention, by mixing the perfect UV absorber of the benzotriazole-based compound with the monomer of the episulfide-based compound, the discoloration blocking agent for blocking the yellowing phenomenon occurring in the lens when converted into a polymer by a catalyst is a blue dye (BLUE Dye) and RED Dye are mixed with the monomer to neutralize the color.

As the blue dye, 1-hydroxy-4-(p-toluidino) anthraquinone (1-Hydroxy-4-p-toluidinoanthraquinone) emits blue light by itself to neutralize the yellowing phenomenon in which the lens appears yellow to blue light. ), and as the red dye, 3H-dibenz[f,ij]isoquinoline-2,7-dione, 3-methyl -6-[(4-methylphenyl)amino]-(3H-Dibenz[f,ij]isoquinoline-2,7-dione, 3-methyl-6-[(4-methylphenyl)amino]-), 1-hydroxy-4-(p-toluidino)anthraquinone, a blue dye (BLUE Dye), and 3H-dibenz[f,ij]isoquinoline-2,7-dione, a red dye (RED Dye), 3 -Methyl-6-[(4-methylphenyl)amino]- is mixed in a weight ratio of 35:9, and when the mixing amount of the blue dye increases, the entire lens becomes blue. It is impossible to neutralize the yellowish color caused by the yellowing phenomenon of the lens by the UV absorber. It is impossible to neutralize what becomes

Looking more specifically at the relative content of the entire composition of the present invention, the monomer A 76.5 to 93.5 to 85% by weight, and the monomer B 4.75 to 5.25 to 5% by weight, and the monomer C, which are mixed in a weight ratio of 17:1:2 Based on 100 parts by weight based on 100 parts by weight of the whole monomer mixed in 10% by weight in 9.75 to 10.25, the catalyst is 0.015 to 0.045 to 0.03 parts by weight of the first catalyst, 0.3 parts by weight to 0.15 to 0.45 to the second catalyst, based on 100 parts by weight of the monomer The three catalysts are mixed in an amount of 0.075 to 0.225 to 0.15 parts by weight, and the first catalyst, the second catalyst, and the third catalyst are mixed in a weight ratio of 1:10:5.

0.02 to 3 to 1.5 parts by weight of the perfect UV absorber is mixed with respect to 100 parts by weight of the monomer, and the blue dye and the red dye as a discoloration blocking agent are mixed in an extremely low content compared to the monomer, and the blue dye is 0.3675 × 0 ^{- From 4} to 0.6825×0 ^-4 to 0.525×0 ^-4 parts by weight, the red dye is mixed from 0.0945×0 ^-4 to 0.1755×10 ^-4 to 0.135×10 ^-4 parts by weight, as described above, the blue dye and red dye are mixed in a weight ratio of 35:9, respectively.

As shown in FIG. 1, the perfect UV blocking lens (=Perfect UV) of the present invention having a mixed composition as shown in FIG. Although it can block at 99.5% or more, which is close to almost 0, conventional plastic lenses have a transmittance that is close to 0 at 397 nm or less. It can be seen that it is low, and at this time, in FIG. 1, the vertical is the transmittance, from 0% of no transmission at all to 100% of the entire transmittance, and the horizontal is the wavelength range of visible light from 380 nm to 500 nm.

In addition, when comparing FIG. 1 and the perfect UV blocking lens of the present invention with a conventional general plastic lens having the same central thickness (CT) in FIG. High, the UV blocking rate of the present invention is also high at 41.0 and 58.1 in the 410 nm wavelength band, and the UV blocking rate of the present invention is lowered in the 420 nm wavelength band, and the blue light blocking rate (Blue Cut) is also perfect UV blocking of the present invention than a conventional general plastic lens It can be seen that the lens is higher than 28.4:29.4, and the perfect UV blocking lens of the present invention has a high UV and blue light blocking rate, but in the entire visible light wavelength range of 380 to 780 nm, the transmittance is significantly higher than that of a conventional plastic lens. And it has the effect of improving the blue light blocking rate and the transmittance of the entire visible light.

3 is a test of the blocking rate in the ultraviolet and short wavelength region when the perfect UV blocking lens of the present invention is composed with a center thickness of 2 mm. It can be confirmed that it has a blocking rate of 50% or more at 410 nm, and a blocking rate of 10% or more at 420 nm. It is to provide a perfect UV blocking lens with high transmittance by allowing the primary color to be transmitted without change.

In the perfect UV blocking lens of the present invention made as described above, as shown in FIG. 4 , the resin composition injected into the mold by the mold preparation process for molding the lens is prepared, and the lens is molded by injection into the mold and then the lens is formed in the mold. After completing the casting molding process through demolding to separate and processing the separated lens surface and lens surface processing steps, the lens completed in the casting molding process is manufactured through a hard coating process and a multi-coating process, The hard coating process and the multi-coating process are manufactured by the applicant's own special manufacturing method, which is not intended to be protected by the present invention, so more specific methods will be omitted. The manufacturing method of the lens including the manufacturing process of the resin composition injected into the lens will be described in detail as follows.

1. 1st single catalyst stirring step

First of all, 2,2'-thiodiethanethiol (consisting of 2,2'-Thiodiethanethiol) among the monomers that are raw materials for plastic spectacle lenses molded in the mold prepared by the mold preparation process causes a curing action on monomer B to convert the monomer into a polymer. The first catalyst consisting of 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate (1,2,2,6,6-Pentamethyl-4-piperidyl Methacrylate) for making It is added and stirred for 10 to 30 minutes (preferably about 20 minutes).

2. Second complex catalyst stirring step

At the same time, it causes a curing action on the monomer B composed of 2,2'-thiodiethanethiol among the monomers that are the raw material of the plastic spectacle lens molded in the mold prepared by the mold preparation process to convert the monomer into a polymer. A second catalyst consisting of dibutyltin dichloride and a third catalyst consisting of benzyltriethylammonium chloride for making into Let it stir while.

3. Complex monomer mixing step

Of the monomers that are raw materials for plastic spectacle lenses that are also molded in the mold prepared by the mold preparation process, monomer A and sulfur ( Monomer C made of sulfur) is put into a reaction vessel capable of maintaining a vacuum state and mixed.

4. UV absorber stirring step

In the mixture of monomer A made of bis(2,3-epithiopropyl)disulfide and monomer C made of sulfur, 2-( A perfect UV absorber consisting of 2-butoxy-2-hydroxyphenyl)-2h-benzotriazole (2-(2-butoxy-2-hydroxyphenyl)-2H-benzotriazole) is added and heated at 25-35°C for 30-60 Stir for a minute (preferably about 40 minutes at 30°C).

5. Mono-catalyst complex monomer mixing step

A single catalyst mixture in which the first catalyst prepared through the first single catalyst stirring step is mixed is put into the reaction vessel containing the complex monomer mixture prepared through the ultraviolet absorber stirring step, and 25 to 35° C. (preferably 30° C.) degree) and stir for 40 minutes to mix.

6. Vacuum stabilization step

The mixture prepared through the mono-catalyst complex monomer mixing step is reduced from an atmospheric pressure of 760 torr to a pressure of 10 torr which is significantly lower than the atmospheric pressure in a reaction vessel to vacuum to stabilize the mixture.

7. Composite catalyst overall mixing step

In the mixture that has undergone the vacuum stabilization step, a composite catalyst mixture in which the second catalyst and the third catalyst are mixed, which are prepared through the secondary composite catalyst stirring step, are added, and at an atmospheric pressure of 760 torr, at a pressure of 10 torr, which is significantly lower than the atmospheric pressure, 25 to 35 The resin composition of the plastic spectacle lens is finally prepared by mixing and stirring at ℃ (preferably about 30℃) for 10 minutes.

8. Mold injection step

As described above, the resin composition finally formed through the entire mixing step of the composite catalyst is injected into the mold prepared in the mold preparation process to be cast and molded with spectacle lenses, but after releasing the vacuum in the reaction vessel, nitrogen is added and the resin When the composition is injected into the mold, it is filtered through a filter having a pore size of 1 μm to be injected into the mold.

After that, the spectacle lens molded in the mold is demolded and the lens surface is processed through the demolding and lens surface processing steps to complete the casting molding process for casting and molding the perfect UV blocking lens.

After the casting molding process of casting the lens as described above, the hard coating process of coating the surface of the lens by immersion in order to increase the hardness of the lens, and the outer surface of the hard coating layer by vacuum deposition to increase the transmittance of the lens and minimize surface damage It is possible to finally manufacture a perfect UV blocking lens through a multi-coating process of coating the

As described above, in the detailed description of the present invention, the most preferred embodiment of the present invention has been described, but various modifications are possible within the scope that does not depart from the technical scope of the present invention. It is not limited to the example, but the scope of protection should be recognized from the techniques of the claims to be described later and equivalent technical means from these techniques.

Claims (8)

Monomers that use episulfide-based compounds having high refractive index and Abbe's number as well as excellent heat resistance and transparency;
a perfect UV absorber composed of a benzotriazole-based compound mixed with the monomer of the episulfide-based compound to block ultraviolet rays of 400 nm or less passing through the lens;
Perfect UV blocking lens, characterized in that it contains.
The method of claim 1 ;
a catalyst mixed with the monomer to cure the monomer to form a polymer;
Discoloration blocking agent mixed in order to block the yellowing phenomenon occurring in the lens when a perfect UV absorber is mixed with a monomer and converted into a polymer by a catalyst;
Perfect UV blocking lens, characterized in that it further contains.
The method of claim 1 ;
The monomer is
Monomer A consisting of bis (2,3-epithiopropyl) disulfide (Bis (2,3-epithiopropyl) disulfide);
a monomer B consisting of 2,2'-thiodiethanethiol;
Monomer C consisting of sulfur;
A perfect UV blocking lens, characterized in that it is mixed.
The method of claim 1 ;
Perfect UV Absorber,
2-(2-butoxy-2-hydroxyphenyl)-2h-benzotriazole having the following structural formula (2-(2-butoxy-2-hydroxyphenyl)-2H-benzotriazole);

A perfect UV blocking lens, characterized in that it consists of.
3. The method of claim 2;
The catalyst is
a first catalyst consisting of 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate (1,2,2,6,6-Pentamethyl-4-piperidyl methacrylate);
a second catalyst composed of dibutyltin dichloride;
a third catalyst consisting of benzyltriethylammonium chloride;
A perfect UV blocking lens, characterized in that it is mixed.
3. The method of claim 2;
Discoloration blocking agent,
1-hydroxy-4-(p-toluidino) anthraquinone, which is a blue dye made to neutralize the yellowing phenomenon of the lens with blue light;
3H-dibenz[f,ij]isoquinoline-2,7-dione, 3-methyl-6-[(4-methylphenyl )amino]-(3H-Dibenz[f,ij]isoquinoline-2,7-dione, 3-methyl-6-[(4-methylphenyl)amino]-);
A perfect UV blocking lens, characterized in that it is a mixed composition.
3. The method of claim 2;
76.5 to 93.5 wt% of monomer A, 4.75 to 5.25 wt% of monomer B, and 9.75 to 10.25 wt% of monomer C based on 100 parts by weight of a monomer;
0.015 to 0.045 parts by weight of the first catalyst;
0.15 to 0.45 parts by weight of the second catalyst;
0.075 to 0.225 parts by weight of a third catalyst;
0.02 to 3 parts by weight of Perfect UV Absorber;
Blue dye (BLUE Dye) 0.3675×0 ^-4 to 0.6825×0 ^-4 parts by weight as a discoloration blocking agent;
^{0.0945×0 -4} to 0.1755×0 ^-4 parts by weight of RED Dye as a discoloration blocking agent;
A perfect UV blocking lens, characterized in that it is a mixed composition.
a first single catalyst stirring step in which a first catalyst for making a polymer by causing a curing action on monomer B among monomers, which is a raw material for a lens, is added alone and stirring for 20 minutes;
A secondary complex catalyst stirring step in which a second catalyst and a third catalyst for making a polymer by causing a curing action on monomer B among monomers, which are raw materials for lenses, are added in a complex manner and stirred for 100 minutes;
A complex monomer mixing step in which monomers A and C are put into a reaction vessel and mixed;
A UV absorber stirring step in which a perfect UV absorber is added to the mixture of monomer A and monomer C mixed in the complex monomer mixing step and stirred at 30° C. for 40 minutes;
A single catalyst mixture in which the first catalyst prepared through the first single catalyst stirring step is mixed is put into the reaction vessel containing the complex monomer mixture prepared through the UV absorber stirring step, and a single catalyst mixed by stirring at 30° C. for 40 minutes complex monomer mixing step;
a vacuum stabilization step of stabilizing the mixture by vacuuming the mixture prepared through the single catalyst complex monomer mixing step under reduced pressure lower than atmospheric pressure in the reaction vessel;
A complex catalyst mixture in which the second catalyst and the third catalyst are mixed is added to the mixture that has undergone the vacuum stabilization step, and the second catalyst and the third catalyst are mixed by stirring at 30° C. for 10 minutes at a pressure lower than atmospheric pressure. full mixing step;
Thereafter, a mold injection step of releasing the vacuum state and injecting nitrogen into the mold by filtering the composition through a filter;
A method of manufacturing a perfect UV blocking lens, characterized in that it contains.

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