JP2016200626A - Light-transmissive resin base material manufacturing method, light-transmissive resin base material, and light-transmissive molded body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-transmissive resin base material manufacturing method that can be applied to light-transmissive molded bodies by using high ITO or ATO to achieve infrared intercepting capability and high enough light-transmissivity required for spectacle lenses and the like.SOLUTION: A manufacturing method for light-transmissive resin base material having near-infrared intercepting capability uses addition of a near-infrared absorbent to the resin base material and addition of a yellow pigment so as to achieve a 75% or higher visible light translucency in a colorless transparent state by restraining clouding due to the addition of the near-infrared absorbent in a preset film thickness. As the near-infrared absorbent, ITO or ATO can be used to keep the transmittance of near-infrared rays in the 1600 nm to 1700 nm wavelength range at no more than 5% and in the 1700 nm to 2500 nm wavelength range at no more than 2%.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a translucent resin base material for near-infrared shielding applied to a translucent molded article such as a spectacle lens or a near-infrared shielding film, a manufacturing method thereof, and spectacles to which the translucent resin base material is applied. The present invention relates to a translucent molded body such as a lens.

For example, there is known a spectacle in which a near-infrared light shielding film is attached to the surface of a spectacle lens so that the near-infrared ray does not enter the eye (see, for example, Patent Document 1).
In the glasses described in Patent Document 1, near infrared rays having a wavelength range of 770 nm to 1800 nm can be cut to a transmittance of 15% or less, more preferably 5% or less (see the description in FIG. 3 and paragraph 0033). . Like glasses described in this document, in near-infrared light shielding films that are laminated on one or both sides of a spectacle lens, the near-infrared cut rate can be increased by increasing the film thickness by increasing the number of layers. Although it can be further increased, if the film thickness is increased beyond a certain level, there arises a problem that the function of the spectacle lens such as translucency is hindered. Further, the glasses described in this document have a problem that near infrared rays exceeding 1800 nm cannot be cut so much (see, for example, FIG. 3 of Patent Document 1).

  Although not for eyeglass lenses, an infrared shielding film using indium tin oxide (ITO) is known. If ITO is used, it becomes possible to cut near infrared rays of 1600 nm to 2200 nm to almost zero with a film thickness of about 10 μm, as in the infrared shielding transparent film described in Patent Document 2, for example.

Japanese Unexamined Patent Application Publication No. 2014-203063 (see, for example, FIG. 3) Japanese Patent Laying-Open No. 2014-106458 (see, for example, the description of paragraph 0048 and the drawings)

However, the infrared shielding film using ITO has a problem that it becomes cloudy. Therefore, there is a problem that it is not suitable for a spectacle lens or the like that has low translucency and whose use is limited to a display or the like and high translucency is required.
Further, the infrared shielding film of Patent Document 2 also has a problem that it is difficult to shield near infrared rays in a wavelength region around 2500 nm.

  The present invention has been made in view of the above problems, and has high infrared shielding properties in a wide wavelength region up to about 2500 nm using near infrared absorbent particles such as ITO and ATO, and has high spectacle lenses and the like. Method for producing translucent resin base material applicable to translucent molded body requiring translucency, provision of translucent resin base material, and spectacle lens using such translucent resin base material An object of the present invention is to provide a translucent molded article such as the above.

  In order to achieve the object of the present invention, the inventor of the present invention has conducted intensive research, and as a result, the white turbidity caused by adding particles of near-infrared absorbents such as ITO to a transparent resin base material is converted into a yellow pigment. It is found that high translucency of 75% or more can be obtained even when the film thickness is increased to some extent in a translucent molded article that requires high translucency such as glasses. It was.

That is, the manufacturing method of the translucent resin base material of Claim 1 is set as the structure which adds the yellow pigment | dye while adding the particle | grains of a near-infrared absorber to a resin base material. The amount of the near-infrared absorbent particles added to the resin substrate is almost equal to the near-infrared in the wavelength region up to around 2500 nm at a preset film thickness (for example, 20 μm to 30 μm for a translucent resin substrate for spectacle lenses). The amount of the yellow pigment added is an amount having a light transmittance of 75% or more with the film thickness in a colorless and transparent state while suppressing white turbidity.
As the resin substrate, an ultraviolet (UV) curable resin, a hard coat agent, or the like can be used as described in claim 2.

  Dissolve each of the resin substrate particles, near infrared absorbent particles and yellow dye in a solvent to prepare a resin substrate solution, a near infrared absorbent solution and a yellow dye solution. Obtain a light-sensitive resin base solution and immerse a light-transmitting molded body such as an eyeglass lens in this light-transmitting resin base solution or apply a light-transmitting resin base solution to the surface of the light-transmitting molded body By doing so, the layer of the translucent resin base material which has the near-infrared shielding effect of this invention can be formed. In this case, it is advantageous in terms of cost if the translucent resin base material layer can be formed with the smallest possible number of immersions and coatings. For this purpose, the viscosity of the translucent resin base solution is preferably increased to a certain level or more, and the amount of solids contained in the translucent resin base solution may be increased.

The amount (ratio) of the resin base material, the external line absorbent and the yellow pigment for forming the translucent resin base material of the present invention can be determined by repeating experiments.
When the inventor of the present invention repeated experiments to find a suitable ratio for a spectacle lens,
As described in claim 3, the present inventors have found that the resin base material, the near-infrared absorber, and the dye may have a weight ratio of 100: 40 to 100: 0.0018 to 0.01. When the weight ratio is 100: 100: 0.01, a more suitable translucent resin substrate is obtained.

If the light-transmitting molded body is, for example, a spectacle lens, the above-mentioned solvent is used so that a layer of a light-transmitting resin substrate having a thickness of about 20 μm to 30 μm can be formed on the surface by one immersion or application. The amount of the resin base material, the near-infrared absorber, and the pigment is adjusted in the above range to obtain a moderately viscous solution (translucent resin base material solution). The translucent resin base material obtained by such translucent resin base material solution has a translucent ratio of 75% or more with a predetermined colorless and transparent film thickness, and has a high near-infrared shielding effect up to 2500 nm. Have.
As the near infrared absorbent, indium tin oxide (ITO) or antimony tin oxide (ATO) can be used as described in claim 4.

  The translucent resin base material having near-infrared shielding property of the present invention is a colorless transparent state having a preset film thickness, as described in claim 5. And containing a near-infrared absorbent and a yellow pigment for suppressing white turbidity due to the addition of the near-infrared absorbent so that it has a visible light transmittance of 75% or more and shields near-infrared rays in a predetermined wavelength region. It is as composition to do.

The near-infrared absorbent content in the resin base material is almost completely in the near-infrared wavelength range up to about 2500 nm at a preset film thickness (for example, 20 μm to 30 μm for a translucent resin base material for spectacle lenses). The amount of yellow pigment added is an amount having a visible light transmittance of 75% or more with the film thickness while suppressing white turbidity.
As the resin substrate, an ultraviolet (UV) curable resin, a hard coat agent, or the like can be used as described in claim 6.

Content of the said resin base material, the said near-infrared absorber, and the said pigment | dye is set to the thing contained in the weight ratio of 100: 40-100: 0.0018-0.01, as described in Claim 7. be able to. By setting the weight ratio to 100: 100: 0.01, a suitable translucent resin substrate can be obtained.
In addition, as said near-infrared absorber, indium tin oxide (ITO) or antimony tin oxide (ATO) can be mentioned as described in Claim 8.
As the effect of absorbing near infrared rays, the transmittance of near infrared rays in the wavelength region of 1600 nm to 1700 nm is 5% or less, and the transmittance of near infrared rays in the wavelength region of 1700 nm to 2500 nm is 2% or less. Preferably there is.

  The translucent molded article of the present invention has a configuration in which a layer of a translucent resin base material having the above configuration is formed on the surface as described in claim 10. The film | membrane of a translucent resin base material can be formed by well-known methods, such as application | coating or immersion. In addition, as described in claim 11, when the translucent molded article is an optical component such as a spectacle lens, the film thickness of the translucent resin base material is preferably about 20 μm to 30 μm.

  In addition, as described in claim 12, the layer of the translucent resin base material having the above-described structure may be formed on a spectacle lens having a function of blocking infrared rays in a wavelength region of 800 nm to 1000 nm. In this way, it is possible to effectively block infrared rays in the region of 800 nm to 1000 nm, and to obtain such a high value-added spectacle lens that effectively blocks near infrared rays in the region of 1600 nm to 2500 nm. .

  According to the method for producing a translucent resin substrate of the present invention, white turbidity due to the use of ITO or ATO can be suppressed with a yellow pigment, and near-infrared light up to a wavelength region of up to about 2500 nm can be almost completely obtained. Even if it is the film thickness to shield, the translucent resin base material which has 75% or more of high visible light translucency can be obtained.

  In particular, by forming the translucent resin base material layer of the present invention on a spectacle lens having a function of blocking infrared rays in the wavelength region of 800 nm to 1000 nm, for example, infrared rays are effectively blocked in the region of 800 nm to 1000 nm, for example. It is possible to obtain a high-value-added spectacle lens that can effectively block near-infrared rays in the region of 1600 nm to 2500 nm.

  Also, translucent molding of spectacle lenses, etc. by dipping or coating by appropriately adjusting the amount of solid particles such as ITO particles and ATO particles and the amount of solids (particles) such as UV curing agent and hard coat agent. When a film of a translucent resin substrate is formed on the surface of the body, a necessary film thickness can be obtained with a small immersion operation or coating operation.

  The translucent resin base material produced by the method of the present invention can be suitably applied to a translucent molded article that requires high translucency such as a spectacle lens, as well as a display, a screen, a vehicle, and a house. It can apply suitably also to the other translucent molded object which needs to shield near infrared rays, such as window glass.

Hereinafter, preferred embodiments of the present invention will be described in detail.
[Resin substrate]
As the resin base material, various known materials can be used. For example, when applied to a spectacle lens, a hard coat agent for forming a hard coat film or a translucent resin base material by ultraviolet irradiation is used. Examples thereof include a UV curable resin to be cured.
A commercially available resin base material can be used.

[Near infrared absorber]
As the near-infrared absorbent, indium tin oxide (ITO) or antimony tin oxide (ATO) can be used. As the near infrared absorbent, those commercially available for filters can be used. For example, ITO is ITO manufactured by Mitsubishi Materials Electronics Chemical Co., Ltd., and ATO is ATO particles manufactured by Mitsubishi Materials Electronics Chemical Co., Ltd. (trade name: T-1) can be used.

[Yellow pigment]
Any yellow pigment may be used as long as it includes a yellow wavelength range of 570 nm to 590 nm, and any pigment that can be uniformly dispersed in a transparent resin substrate is usable. For example, nitroso dye, nitro dye, azo dye, stilbene azo dye, ketoimine dye, triphenylmethane dye, xanthene dye, acridine dye, quinoline dye, methine dye, polymethine dye, thiazole dye, indamine dye, indophenol dye, azine dye Oxazine dye, thiazine dye, sulfur dye, aminoketone dye, oxyketone dye, anthraquinone dye, indigoid dye, phthalocyanine dye, and the like.
As a commercially available product, for example, Nippon Kayaku pigment (trade name: Kayase YellowEG) can be used.

[Addition and curing]
The resin base material particles are dissolved in an organic solvent to obtain a resin base material solution, and the near infrared absorbent particles are dissolved in a solvent to obtain a near infrared absorbent solution. Also, a yellow pigment solution is obtained by dissolving a yellow pigment in a solvent. Then, an appropriate amount of these are mixed to obtain a translucent resin base material solution.

  The addition amount of the near-infrared absorbent particles is such that the near-infrared ray in the wavelength region of 1600 nm to 2500 nm is 5% or less, preferably in the wavelength region of 1700 nm to 2500 nm, in the preset film thickness of the translucent resin substrate. The amount of infrared rays can be cut almost completely to 2% or less, preferably 1% or less.

  The yellow pigment suppresses white turbidity of the translucent resin base material generated by the addition of a near infrared absorbent such as ITO or ATO, and the visible light transmissivity of the translucent resin base material is 75% in a colorless and transparent state. Add the amount to be above. A suitable addition amount can be selected by repeating the experiment. If the addition amount is too small, white turbidity cannot be sufficiently suppressed, and if the addition amount is too large, the translucent resin base material becomes yellowish.

[Additional functions]
In the translucent resin base material of this invention, you may add a polarization function, a light control function, and a vision correction function. You may add another pigment | dye and an additive as needed.

[Formation of translucent resin substrate]
The resin base material particles are dissolved in an organic solvent to obtain a resin base material solution, and the near infrared absorbent particles are dissolved in a solvent to obtain a near infrared absorbent solution. Also, a yellow pigment solution is obtained by dissolving a yellow pigment in a solvent. Then, an appropriate amount of these are mixed to obtain a translucent resin base material solution. By immersing the translucent molded body in this translucent resin base material solution or applying the translucent resin base material solution to the surface of the translucent molded body and curing it, the translucent resin base material is cured. This layer can be formed on the surface of the translucent molded body.

In addition, the translucent resin base material can be used in the form of a film having a desired film thickness and attached to a translucent molded body such as a spectacle lens, a display, a screen, or a window glass of a vehicle or a house.
As a material which can be used for a translucent molded object, the kind will not be limited if it is excellent in translucency. For example, for eyeglass lenses, acrylic resin, polycarbonate resin, and the like can be given.

  A preferable content ratio of the resin base material, the near-infrared absorber, and the pigment is a translucent property of 75% or more at a predetermined colorless and transparent film thickness (for example, about 20 μm to 30 μm for an optical component such as a spectacle lens). And a high near-infrared shielding effect from around 1600 nm to around 2500 nm. A suitable mixing ratio can be selected by repeating the experiment. As a result of experiments by the inventor of the present invention as described later, the mixing ratio of the resin base material, the near-infrared absorber, and the dye is approximately 100: 40 to 100: 0.0018 to 0.01 by weight. I found what I can do with the ratio. In the experiment, good results were obtained when the weight ratio was approximately 100: 100: 0.01.

  In addition, the film thickness of a translucent resin base material repeats immersion or application | coating and drying or hardening to the solution (translucent resin base material solution) containing the said resin base material, the said near-infrared absorber, and the said pigment | dye. Therefore, it can be set to a desired dimension. However, since drying or curing takes time, it is preferable in terms of cost to obtain a desired film thickness with the smallest possible number of immersions or coatings. For this purpose, it is necessary to make the viscosity of the translucent resin substrate solution moderate. Then, the addition amount of the resin base material, the near-infrared absorber, and the pigment that are solids with respect to the solvent within the above range is adjusted to make the translucent resin base material solution suitable viscosity.

[Example]
Hereinafter, specific examples of the present invention will be described. The materials used are as follows.
(1) Resin base solution (A)
Resin substrate solutions having a content of UV curable resin particles of 15 wt% and 35 wt% were prepared.
(2) Near infrared absorbent solution (B)
A near-infrared absorbent solution containing 40% by weight of Mitsubishi Materials ITO particles was prepared.

(3) Dye solution (C)
A dye solution containing 0.2% by weight of Nippon Kayaku dye (trade name; Kayase YellowEG) was prepared.
In addition, each solvent used for the resin base material solution, the near-infrared absorbent solution, and the dye solution is the same type, or a different type that can be mixed with each other is used.
(4) Formation of translucent resin base material A mixed solution (translucent resin base material solution) obtained by mixing the solutions (A), (B), and (C) and stirring well is obtained once. It was so viscous that the colorless translucent resin layer having a film thickness of 20 to 30 μm could be formed on the surface of the lens for spectacles. A lens for spectacles made of polycarbonate was immersed in this mixed solution and cured with UV to form a translucent resin layer having a thickness of 20 to 30 μm on the surface of the lens.

(5) Experimental Results The experiment was repeated under the above conditions, and the degree of white turbidity suppression, coloring, transmissivity of visible light, and transmissivity in the near infrared region of the translucent resin layer were comprehensively studied. The results are summarized in the following table.
In the table, “◎” indicates that the lens is very excellent as a spectacle lens, “◯” indicates that it is excellent, and “×” indicates that it is not suitable.

Experimental Example No. 1-7, Experimental Example No. No. 3 is a comparative example using a red pigment instead of a yellow pigment. 7 is an experimental example No. 7. 6 is that of a second embodiment described later under the same conditions as those in FIG.
Table 1 shows the amount (g) of each mixed solution and the determination result, and Table 2 shows the total amount of the translucent resin base solution and the content of each material in the experimental examples Nos. 3 to 7 to which the yellow pigment was added. Table 3 shows the conversion of the content of each material in 100 parts by weight of the translucent resin base material solution based on the experimental results of Table 2.

  No. The experimental results of 3-6 are shown in the graphs of FIGS. No. 1 using a red pigment instead of a yellow pigment. No. 3 (FIG. 1) is black and cannot be used for spectacle lenses. Nos. 4 and 5 can be used for a translucent molded body that requires high translucency such as a spectacle lens, and in particular, No. 6 (FIG. 4) gave a very favorable result.

From this experimental result, the resin base material (UV curable resin), the infrared absorber (ITO), and the pigment are preferably mixed by using a weight ratio of about 100: 40 to 100: 0.0018 to 0.01 as a guide. It can be seen that a transparent resin base material can be obtained. In particular, a resin base material (UV curable resin) and an infrared absorber (ITO) are almost the same amount, and a yellow pigment is added to these in an amount of about 1/1 × 10 ⁴ by weight, so that an optimal translucent resin is obtained. It turns out that a base material is obtained.

[Example 2]
Experimental Example No. 1 of Example 1 No. 5166482 by the applicant of the present application is immersed in the translucent resin substrate solution used in No. 6, and cured by UV irradiation, and the translucent resin substrate having a film thickness of 30 μm is formed on the surface of the spectacle lens. A film was formed. The results are shown in Experimental Examples Nos. 7.

  As described in Japanese Patent No. 5166482, a spectacle lens is a phthalocyanine having a minimum value of a spectral transmittance curve having a transmittance of less than 10% within a wavelength range of 800 nm to 850 nm with respect to 100 kg of a polycarbonate resin. A phthalocyanine dye having a minimum value of a spectral transmittance curve with a transmittance of less than 10% within a wavelength range of 16.0 g to 17.0 g and a wavelength range of 950 nm to 1000 nm, and 18.5 g to 19.5 g, 875 nm to 875 nm A phthalocyanine dye having a minimum value of a spectral transmittance curve with a transmittance of less than 10% within a wavelength range of 925 nm is mixed in a proportion in a weight range of 16.0 g to 17.0 g, and melted together with the resin and injected. Is formed.

FIG. 5 shows a graph of spectral transmittance in the spectacle lens with the translucent resin base film of the present invention obtained in Example 2.
In Example 2, it is possible to obtain a high-value-added spectacle lens that can effectively block infrared rays in the region of 800 nm to 1000 nm and can effectively block near infrared rays in the region of 1500 nm to 2500 nm. did it.

Although the embodiment of the present invention has been described, the present invention is not limited to the above embodiment.
For example, the translucent resin base material of the present invention can be provided with a dimming function in addition to a polarizing function, and in particular, in the case of a spectacle lens, it can also be provided with a vision correction function.

  The translucent resin base material of the present invention can be widely applied to spectacle lenses such as sunglasses (including those having polarization function and dimming function), front spectacles, and protective spectacles as well as normal spectacles. It can also be applied to other translucent molded articles such as displays, filters, window glass of vehicles and houses.

It is a relationship graph of the transmittance | permeability which shows the experimental result of No3. It is a relationship graph of the transmittance | permeability which shows the experimental result of No4. It is a transmittance | permeability and wavelength related graph which shows the experimental result of No5. It is a transmittance | permeability and wavelength related graph which shows the experimental result of No6. 6 is a graph showing the relationship between transmittance and wavelength, showing the results of Example 2.

Claims (12)

In the method for producing a translucent resin base material having a near infrared shielding property,
While adding a near-infrared absorber to a resin base material, with a preset film thickness, suppressing white turbidity due to the addition of the near-infrared absorber and having a visible light transmittance of 75% or more in a colorless and transparent state Adding yellow pigment,
A process for producing a translucent resin substrate characterized by The method for producing a translucent resin base material according to claim 1, wherein the resin base material is a UV curable resin or a hard coat agent. In the solution containing the resin substrate, the near-infrared absorber, and the pigment, the resin substrate, the near-infrared absorber, and the pigment are in a weight ratio of 100: 40 to 100: 0.0018 to 0.01. The method for producing a translucent resin base material according to claim 1, wherein the translucent resin base material is contained. The said near-infrared absorber is indium tin oxide (ITO) or antimony tin oxide (ATO), The manufacturing method of the translucent resin base material in any one of Claims 1-3 characterized by the above-mentioned. In the translucent resin base material having a near infrared shielding property,
Addition of near-infrared absorbent particles and near-infrared absorbent particles so as to have a visible light transmittance of 75% or more in a colorless and transparent state at a preset film thickness and to block near-infrared rays in a predetermined wavelength region Containing a yellow pigment to suppress white turbidity due to
A translucent resin base material characterized by the above. The translucent resin base material according to claim 5, wherein the resin base material is a UV curable resin or a hard coat agent. The translucent resin base material solution containing the resin base material, the near-infrared absorber, and the pigment in a weight ratio of 100: 40 to 100: 0.0018 to 0.01. 5. The translucent resin base material according to 5 or 6. The said near-infrared absorber is an indium tin oxide (ITO) or an antimony tin oxide (ATO), The manufacturing method of the translucent resin base material in any one of Claims 5-7 characterized by the above-mentioned. The near-infrared transmittance in a wavelength region of 1600 nm to 1700 nm is 5% or less, and the near-infrared transmittance in a wavelength region of 1700 nm to 2500 nm is 2% or less. Translucent resin base material. A translucent molded article, wherein the film of the translucent resin base material according to claim 5 is formed on a surface. The translucent molded article according to claim 10, wherein the translucent resin base material has a thickness of 20 μm to 30 μm. The translucent molded article according to claim 14 or 15, which has a function of blocking infrared rays in a wavelength region of 800 nm to 1000 nm.

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