TW201927572A - Optical laminate, polarizing lens and eyewear provided with the same - Google Patents

Abstract

An optical laminate of the present invention includes a cholesteric liquid crystal layer and a polarizing element between a first support and a second support, wherein the first support and/or the second support contains a polyamide resin, and at least one combination selected from the group consisting of (1) a first or second support and a polarizing element, (2) a first or second support and a cholesteric liquid crystal layer, and (3) a cholesteric liquid crystal layer and a polarizing element are bonded with a solventless ultraviolet curable adhesive.

Description

Optical laminated body, polarizing lens provided with the optical laminated body, and eyewear

The present invention relates to an optical multilayer body including a cholesterol-type liquid crystal layer and a polarizing element, and an ophthalmic wearing device (sunglasses, goggles, helmet visor, etc.) using the optical multilayer body.

In order to reduce glare caused by reflected light from water, road, snow, etc., eyewear (sunglasses, goggles, visor for helmets, etc.) is used. For example, sunglasses are colored by using pigments or the like in the lens portion. The absorption of the pigments is used to reduce the amount of light incident on the eyes and reduce the degree of glare. Polarized sunglasses are particularly effective for reflecting light on the water and snow .

Since polarized sunglasses are designed to make reflected light into polarized light and effectively absorb light in the direction of the polarized light, the amount of incident light to the eyes is not greatly reduced, and the degree of glare can be reduced and visibility can be improved.

Polarized sunglasses are generally obtained by mounting a polarizing lens into a frame. The polarizing lens is an optical laminate formed by mounting a polarizing element with a support such as polycarbonate in a mold, and a lens base layer. It is injection-molded and processed into a desired shape (Patent Document 1). The polarizing element is a film formed by uniaxially aligning a so-called dichroic dye such as a dichroic dye and a polyiodine-polyvinyl alcohol (PVA) complex with a polymer such as PVA. According to the color of the pigment used, In addition, polarizing elements of various colors can be obtained, and if they are ordinary sunglasses, they are mostly made into a gray color to impart polarization to the entire visible light region.

For polarized sunglasses, a multilayer film is deposited on the surface in order to provide design or further enhance visibility. If a multi-layer film is provided, it can be seen by others that the reflected light on the surface of the sunglasses is a metallic tint of blue, green, and red. From the perspective of the wearer, it can be reduced by reflecting specific light. At the same time, the visibility of the scenery is further improved. If such a multilayer film is provided, it is beneficial to the wearer, but on the other hand, there are problems in operation such as sebum that is difficult to remove when attached to the multilayer film, and if it is exposed to the sea or the like In the place of moisture and sea breeze, there is a problem that the multilayer film may peel off.

For such a problem, a method of arranging a multilayer film on the inside of the support (that is, between the polarizing element and the support) may be considered. However, because the multilayer film exhibits reflection performance due to the difference in refractive index between the layers, It is difficult to obtain reflection performance equivalent to that of the outside air interface. In addition, since the multilayer film is composed of an inorganic substance, there is a problem in adhesion between the multilayer film and a polarizing element that is an organic substance.

On the other hand, in the method for imparting a metallic hue using an organic substance instead of a multilayer film, a cholesterol-type liquid crystal layer is used. Method (Patent Document 2). In the cholesteric liquid crystal, the liquid crystal molecules are in a state of spiral alignment, and have a function of selectively reflecting a circularly polarized light component in the same direction as the spiral direction of a specific wavelength region according to the length of the spiral pitch. When the cholesteric liquid crystal layer obtained by immobilizing the spiral alignment into a desired reflection wavelength region is used for the optical multilayer body, it has a clear hue and can provide decorative properties.

In terms of high transparency, colorlessness, high impact resistance, and high heat resistance, polycarbonate is generally used as the lens base layer of the polarizing lens (Patent Document 3).

[Prior technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2010-39220

[Patent Document 2] Japanese Patent Laid-Open No. 2001-180200

[Patent Document 3] International Publication No. 2016/002582

However, in Patent Document 3, since the heat distortion temperature of the polycarbonate is as high as 130 to 140 ° C, there is a problem in terms of processability during molding. In addition, in a polarizing lens using polycarbonate, there is a problem of whitening the frame portion in contact due to the influence of exhaust gas generated by heating, and the material of the frame is limited. In addition, when a thermosetting adhesive is used for the adhesion of a cholesteric liquid crystal layer and a polycarbonate resin, sufficient adhesion strength may not be obtained.

An object of the present invention is to provide an optical laminate having good processability, light weight, high productivity, and suppressing whitening of a frame in an ophthalmic wearer such as polarized sunglasses including a cholesterol-type liquid crystal layer, and An ophthalmic wearing device using the optical laminate.

As a result of intensive research by the present inventors, an optical laminated body was found, which includes a cholesterol-type liquid crystal layer and a polarizing element between the first support and the second support; wherein the first support and / or the second support system Contains polyamide resin; In addition, at least one combination selected from the group consisting of the following 1) to 3) is bonded with a solvent-free ultraviolet curing adhesive, 1) the first or second support And a polarizing element, 2) a first or second support and a cholesteric liquid crystal layer, and 3) a cholesteric liquid crystal layer and a polarizing element. This problem can be solved by this optical laminated body, and this invention was completed.

That is, the present invention relates to the following:

(1) An optical laminate comprising a cholesteric liquid crystal layer and a polarizing element between a first support and a second support; wherein the first support and / or the second support system contains a polyamide resin; and , Using a solvent-free UV-curable adhesive to attach at least one combination selected from the group consisting of 1) to 3): 1) a first or second support and a polarizing element, 2) a first Or a second support and a cholesteric liquid crystal layer, and 3) a cholesteric liquid crystal layer and a polarizing element.

(2) The optical laminate according to the above (1), wherein the polyamide resin is a nylon having an aliphatic skeleton.

(3) The optical layered body according to the above (1) or (2), wherein the solvent-free ultraviolet curing type adhesive contains a urethane (meth) acrylate.

(4) A polarizing lens, which is obtained by injection-molding a lens substrate in the optical multilayer body according to any one of (1) to (3) above.

(5) The polarizing lens according to the above (4), wherein the lens base material contains a polyamide resin.

(6) The polarizing lens according to the above (5), wherein the polyamide resin contained in the lens substrate is a nylon having an aliphatic skeleton.

(7) An ophthalmic wearing device in which a polarizing lens according to any one of (4) to (6) above is incorporated in a frame.

When the optical laminated system of the present invention is used in an ophthalmic wearing device such as polarized sunglasses, it has excellent processability during molding, is lightweight, has high productivity, and can suppress frame whitening.

1‧‧‧first support

2‧‧‧ Adhesive layer

3‧‧‧cholesterol type liquid crystal layer

4‧‧‧ Adhesive layer

5‧‧‧cholesterol type liquid crystal layer

6‧‧‧ Adhesive layer

7‧‧‧ polarizing element

8‧‧‧ Adhesive layer

9‧‧‧ second support

10‧‧‧ Optical Laminate

11‧‧‧ polarized lens

12‧‧‧ lens substrate

FIG. 1 is an explanatory diagram showing an optical multilayer body of the present invention.

Fig. 2 is an explanatory view showing an optical multilayer body according to another embodiment of the present invention.

The optical laminated system of the present invention includes a cholesteric liquid crystal layer, which functions as a light reflecting layer. The so-called cholesteric liquid crystal layer includes a nematic liquid crystal having chirality, or a chiral agent added to the nematic liquid crystal. Into the formulation. Since the spiral direction and reflection wavelength can be arbitrarily designed according to the type and amount of the chiral agent, a method of adding a chiral agent to a nematic liquid crystal to obtain a cholesterol-type liquid crystal layer is preferable. The nematic liquid crystal layer used in the present invention is different from the so-called liquid crystal layer operated in an electric field, and is used by fixing the spiral alignment state. Therefore, it is preferable to use a nematic liquid crystal monomer having a polymerizable group. .

Regarding the method for producing a cholesteric liquid crystal layer used in the present invention, for example, for a nematic liquid crystal monomer having a polymerizable group, a necessary amount of a right-handed or left-handed chiral agent is added so as to reflect a desired wavelength. . Next, these were dissolved in a solvent, and a photopolymerization initiator was added. Then, the solution is coated on a plastic substrate such as a PET film with a uniform thickness as much as possible, while removing the solvent by heating, the substrate becomes a cholesteric liquid crystal on the substrate, and is aligned at a desired spiral pitch. It can be left for a certain period of time under temperature conditions. At this time, the orientation of the cholesteric liquid crystal can be made more uniform and the haze value of the film can be reduced by performing an alignment treatment such as rubbing or stretching on the surface of the plastic film before coating. Then, while maintaining the alignment, the alignment is fixed by irradiating ultraviolet rays with a high-pressure mercury lamp or the like to obtain a cholesterol-type liquid crystal layer used in the present invention.

The cholesteric liquid crystal layer used in the present invention can be used by laminating two or more layers, and can also be used as a single layer. For example, when two layers are stacked and used, in order to maintain a high degree of polarization, the right-hander and the left-hander are preferably stacked and used.

The method of lamination is not particularly limited, and it is preferable to use an adhesive and an adhesive for lamination. Acrylic For rubber-based adhesives, acrylic adhesives that are easy to adjust for adhesion and retention are preferred. Examples of the adhesive include a UV-curable adhesive and a heat-curable adhesive. In the case of a UV-curable adhesive, it is a composition obtained by mixing a plurality of monomers having an acrylic fluorenyl group or an epoxy group in the presence of a photopolymerization initiator to irradiate ultraviolet rays to harden and Go on. In the case of a thermosetting adhesive, a composition obtained by mixing a plurality of monomers having an epoxy group in the presence of an acid catalyst can be used to harden and then adhere. From the viewpoint of hardening in a short time and high productivity, an ultraviolet curing adhesive is preferred.

The polarizing element used in the present invention is typically a PVA polarizing film. The production method is not particularly limited, and is produced by causing a polymer film containing polyvinyl alcohol or a derivative thereof to adsorb a pigment such as iodine or a dichroic dye, and uniaxially stretching the film. The dye is preferably a dichroic dye from the viewpoint of heat resistance, and particularly preferably a direct dye containing an azo dye having a sulfonic acid group.

The optical laminated system of the present invention includes a first support and a second support. The first support and / or the second support system contains a polyamide resin. Compared with polycarbonate resins, polyamide resins have less optical anisotropy, suppress birefringence, and have excellent solvent resistance. In addition, the specific gravity is low and lightweight, and the heat distortion temperature is low, so the processability during molding is good. When using nylon as the injection molding resin, in order to prevent deterioration of the appearance due to the refractive index difference, and to ensure adhesion, the injection molding resin of the lens base layer and the support of the optical laminate are made of the same material. In this regard, it is also preferable to use a polyamide resin. In addition, when a polyamide resin is used, since the frame whitening phenomenon caused by the influence of exhaust gas generated by heating can be suppressed, it is also preferable from the viewpoint that the material of the frame is not limited, as described later.

Examples of the polyamine resin include nylon having an aliphatic skeleton and polyarylamine composed of only an aromatic skeleton. Examples of the nylon include nylon 6, nylon 11, nylon 12, and nylon 66. Examples of the polyaramide include para-based polyaramide and meta-based polyaramide.

When only the first support or the second support system contains a polyamide resin, the other support system is preferably a polycarbonate resin or a cellulose triacetate resin.

In the present invention, when "between the support and the polarizing element" and / or "between the support and the cholesterol-type liquid crystal layer" and / or "between the cholesterol-type liquid crystal layer and the polarizing element", A solventless UV curing adhesive is used. When a solvent system is used, there is a problem that the surface of the substrate is eroded and the adhesion force is reduced. In contrast, by using a solvent-free adhesive, damage to the film can be suppressed. In the case of an ultraviolet-curing adhesive, the composition can be cured by irradiating ultraviolet rays in the presence of a photopolymerization initiator to a composition obtained by mixing a plurality of monomers having an acrylic fluorenyl group or an epoxy group. . From the viewpoint of short-term curing and high productivity, an ultraviolet curing adhesive is preferred.

It is preferable to use a solvent-free ultraviolet curing type adhesive for all the adhesive layers.

Examples of the solvent-free UV-curable adhesive used in the present invention include (meth) acrylate-based adhesives and ene / thiol-based adhesives. Adhesives, unsaturated polyester-based adhesives, and other adhesives that use photoradical polymerization, or epoxy-based adhesives, oxetane-based adhesives, epoxy / oxetane-based adhesives, Vinyl ether-based adhesives and the like are used in photocationic polymerization reactions. These adhesives may be used alone or in combination. Make it transparent. From the viewpoint of good weather resistance, a (meth) acrylate-based adhesive is particularly preferred. The (meth) acrylate-based adhesive contains "a monomer or oligomer having one or more (meth) acrylfluorene groups in the molecule" and a "photopolymerization initiator" as essential components. This (meth) acrylic-type adhesive agent may contain an additive etc. suitably as needed. Examples of the oligomer having one or more (meth) acrylfluorene groups in the molecule include epoxy (meth) acrylate, polyester (meth) acrylate, and urethane (methyl ) Acrylic acid esters, particularly preferably urethane (meth) acrylates.

When adjusting the viscosity of the UV-curable adhesive, it is sufficient to use various solvents that can sufficiently dissolve the adhesive. However, since there is a problem that the surface of the substrate is eroded and the adhesive force is reduced, a reactive diluent ( For example, a monofunctional acrylic monomer is preferred. Examples of the monofunctional acrylic monomer include isooctyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, cyclohexyl (meth) acrylate, and (meth) ) 2-methoxyethyl acrylate, methoxytriethylene glycol (meth) acrylate, alkylene oxide modified products of phenol derivatives, (meth) acrylate, 2-ethyl Hexylcarbitol (meth) acrylate, ethoxyethoxyethyl (meth) acrylate, tricyclodecane (meth) acrylate, dicycloenyl (meth) acrylate, (meth) Isoamyl acrylate, adamantane (meth) acrylate, benzyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, 2-methacrylate Hydroxyethyl ester, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, N- (meth) propylene Ethoxyethylhexahydrophthalimide, ω-carbonyl polycaprolactone (meth) acrylate, (meth) acrylic phthalate monohydroxyhexyl, (meth) acrylic acid dimer Things.

The ultraviolet-curable adhesive is cured by irradiating ultraviolet rays. Various types of ultraviolet rays can be used. The ultraviolet light source is not particularly limited. For example, sunlight, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a metal halide lamp, and the like can be used. Among these, from the viewpoint of being inexpensive and excellent in versatility, High-pressure mercury lamps and metal halide lamps are preferred.

The cholesteric liquid crystal layer and the polarizing element are held by a support with an adhesive layer or the like interposed therebetween, whereby the optical laminate of the present invention can be obtained.

FIG. 2 is an example of a configuration diagram of the present invention. The cholesterol-type liquid crystal layers 3 and 5 and the polarizing element 7 laminated via the adhesive layers 4 and 6 are held by the support bodies 1 and 9 via the adhesive layers 2 and 8 to obtain the optical laminate 10 of the present invention. The polarizing lens 11 is obtained by injection-molding the lens base material layer 12 on the optical multilayer body 10 of the present invention.

The lens base material is not particularly limited, and examples thereof include thermoplastic resins that can be molded by injection molding, thermosetting resins that are generally used in ophthalmic wear lenses, and the like that can be molded by casting polymerization. . Examples include (meth) acrylic resins such as methyl methacrylate homopolymers, copolymers of methyl methacrylate and one or more other monomers, and diethylene glycol diallyl carbonate. Ester homopolymer, diethylene glycol Diethylene glycol diallyl carbonate resins such as copolymers of alcohol diallyl carbonate and one or more other monomers; acrylonitrile-styrene copolymers; halogen-containing copolymers; thioethers Polythioether resins, such as homopolymers of monomers having a bond, copolymers of monomers having a thioether bond and one or more other monomers; polyurea resins; polyamide resins; polycarbonate resins; Polystyrene resin; Polyolefin resin; Polyvinyl chloride resin; Polyester resin; Polyethylene terephthalate; Polyurethane resin; Polythiourethane resin and other sulfur-containing resins Urethane resin; epoxy resin, etc. From the standpoint of adhesion with the optical laminate, it is preferable that the same material be used as the layer in contact.

By using the optical laminated body of the present invention, the cholesteric liquid crystal layer is formed into a desired shape and fixed to the frame so that the cholesteric liquid crystal layer becomes the outer side, an eyewear (sunglasses) using the optical laminated body of the present invention can be obtained , Goggles, visors for helmets, etc.).

For example, in the case of sunglasses, the optical laminated body is punched into a desired shape, and then a bending process is performed. There is no particular limitation on the method of the bending processing, as long as the processing can be performed in accordance with the purpose and through a step capable of imparting a shape to a spherical surface or an aspherical surface. It is also possible to inject the resin into the bent product. At this time, there is also an advantage that the uneven thickness of the optical laminated body is not seen. Even if the lens does not have a focal refractive power, it can be used for products having particularly excellent impact resistance, appearance, and eye fatigue. .

A hard coat layer, an anti-reflection film, and the like are appropriately formed on the surface, and then they are fixed to the frame by edging, digging, locking screws, etc., thereby becoming sunglasses.

Examples of the material of the frame include synthetic resin materials such as celloid, acetate, and polyamide, and natural materials such as tortoiseshell. A polarizing lens formed by using a nylon resin having an aliphatic skeleton for injection molding is suitable for use because it has no problems such as whitening even when combined with a cellulose-based frame.

[Example]

Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to such examples.

[Example 1]

<Production of Cholesterol-type Liquid Crystal Layer>

40 g of a polymerizable liquid crystal monomer (manufactured by BASF, trade name: LC242), 3 g of a chiral agent (manufactured by BASF, trade name: LC756), and 2 g of a photopolymerization initiator (manufactured by BASF, trade name: IRGACURETPO) The prepared coating liquid was produced into a right-handed cholesteric liquid crystal layer according to the following procedure. In addition, 40 g of a polymerizable liquid crystal monomer (manufactured by BASF, trade name: LC242), 9 g of a chiral agent (manufactured by Merck, trade name: S1080), and a photopolymerization initiator (manufactured by BASF, trade name: IRGACURETPO) were used. ) 2 g of the prepared coating liquid, and a left-handed cholesteric liquid crystal layer was produced according to the same procedure. As the plastic substrate, a PET film (manufactured by Toyobo Co., Ltd. without an easy-adhesive layer) was used.

(1) A coating liquid was applied on a PET film at a room temperature so that the thickness of the film after drying was 4 μm using a wire bar.

(2) The solvent was removed by heating at 150 ° C for 5 minutes. Next, the high-pressure mercury lamp (manufactured by Hanson Toshiba Lighting Co., Ltd.) The output power was subjected to UV irradiation for 5 to 10 seconds to obtain a cholesteric liquid crystal layer.

(3) Peel off the PET film.

In this way, a cholesteric liquid crystal layer used in the present invention is obtained.

<Manufacture of Polarizing Element>

Polyvinyl alcohol (manufactured by Kuraray Co., Ltd., trade name: Kuraray Vinylon # 750) was added to Chlorantine Fast Red (CI28160) at 0.25 g / L, and chrysophenine (CI24895) After dyeing in an aqueous solution of 0.18 g / L, 1.0 g / L of Solophenyl Blue 4GL (CI34200) and 10 g / L of sodium sulfate at 35 ° C for 3 minutes, the solution was extended to 4 times in solution. Subsequently, this dyed sheet was immersed in an aqueous solution containing 2.5 g of nickel acetate and 6.6 g / L of boric acid at 35 ° C. for 3 minutes. After the sheet was kept in a tense state, it was dried at room temperature for 3 minutes, and then heated at 70 ° C for 3 minutes to obtain a polarizing element. Using a spectrophotometer with a polarizing element and measuring the degree of polarization according to the absolute polarization method, the degree of polarization was 99.5%.

<Production of optical laminated body>

6 g of urethane acrylate (manufactured by Nippon Kayaku Co., Ltd., trade name: UX-4101), 25 g of 4-hydroxybutyl acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name: 4-HBA), 20 g of tetrahydrofurfuryl acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name: VISCOTE # 150), 10 g of isopropyl acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name: IBXA), bisphenol A type 30 g of epoxy resin (manufactured by Nippon Kayaku Co., Ltd., trade name: RE-310S), 3 g of photopolymerization initiator (manufactured by Nippon Kayaku Co., Ltd., trade name: DETX-S), photopolymerization initiator ( 0.1 g of Kawasaki Chemical Industry Co., Ltd., trade name: UVS-1331), and 5 g of a photopolymerization initiator (manufactured by BASF, trade name: IRGACURE270) were mixed to produce a solventless ultraviolet curing adhesive. After the aforementioned cholesteric liquid crystal layer and the polarizing element were bonded with the adhesive, a cured product was obtained by irradiating ultraviolet rays under the conditions of an illumination intensity of 146 mW / cm ² and a cumulative light amount of 866 mJ / cm ² using a high-pressure mercury lamp. Furthermore, a support of a polyamide resin (manufactured by EMS, trade name: Grilamid TR-90) having a thickness of about 0.2 mm was held through the adhesive, and ultraviolet rays were similarly irradiated to obtain the optical laminate of the present invention. .

The obtained optical laminated body was punched into a strip shape using a mold having a perfect circle with a diameter of 79.5 mm and a width of 55 mm cut in a vertical direction as a basic shape, and a base curve of 7.95 (radius of curvature 66.67mm) mold was bent at a low temperature of 110 ° C to make the side of the cholesterol-type liquid crystal layer a convex surface. The optical laminated system has good processability and good adhesion, and does not peel off even after being immersed in water at 80 ° C for one day.

[Example 2]

<Manufacture of polarized sunglasses>

The optical laminated body subjected to the bending process in Example 1 was inserted into a mold for injection molding, and the molten transparent nylon was injection-molded on the concave side to obtain a polarized lens. Next, edging is performed in accordance with the frame, and the polarized lens is embedded in a cellulose-based frame to manufacture polarized sunglasses.

About the Polarized Sunglasses Made The adhesion between the amine support and the transparent nylon was good, and it did not peel off even after being immersed in water at 80 ° C for one day. Furthermore, no whitening of the frame was confirmed.

[Comparative Example 1]

A procedure similar to that of Example 1 and Example 2 was used except that a support of 0.3 mm thick polycarbonate (Mitsubishi Gas Chemical Co., Ltd., bisphenol A-type aromatic polycarbonate) was used as the support. Make polarized sunglasses for comparison.

The manufactured optical laminate had poor workability at a low temperature of 110 ° C., and could not be sufficiently bent and cracked.

Regarding the produced polarized sunglasses, the support of polycarbonate and the transparent nylon had poor adhesion. When immersed in water at 80 ° C for 1 day, peeling was observed at the ends. In addition, when combined with a cellulose-based frame, whitening was confirmed at the contact portion.

[Comparative Example 2]

In addition to manufacturing 6 g of polyvinyl alcohol (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name: Gohsenex Z200) and 1.5 g of hardener (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name: SPM-01), A thermosetting adhesive made by mixing 100 g of pure water and curing it at 80 ° C. for 10 minutes was used to produce an optical laminate for comparison using the same procedure as in Example 1.

The produced optical laminate had poor adhesion, and interlayer peeling was observed when immersed in water at 80 ° C for one day.

[Comparative Example 3]

In addition to using a 0.3mm thick polycarbonate support (Mitsubishi Gas Except for bisphenol A type aromatic polycarbonate (manufactured by Chemical Co., Ltd.), an optical laminated body for comparison was produced using the same procedure as in Comparative Example 2 except for the support.

The manufactured optical laminate had poor workability at a low temperature of 110 ° C., and could not be sufficiently bent and cracked. In addition, the adhesion was poor, and interlaminar peeling was confirmed when immersed in water at 80 ° C for one day.

[Comparative Example 4]

In addition to "6 g of urethane acrylate (manufactured by Nippon Kayaku Co., Ltd., trade name: UX-4101) to be used as an adhesive, monofunctional acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name: 4- HBA) 25g, epoxy resin (manufactured by Nippon Kayaku Co., Ltd., trade name: RE-310S) 30g, photopolymerization initiator (manufactured by Nippon Kayaku Co., Ltd., trade name: DETX-S) 3g, photopolymerization 0.1 g of initiator (made by Kawasaki Chemical Industry Co., Ltd., trade name: UVS-1331), 5 g of photopolymerization initiator (manufactured by BASF, trade name: IRGACURE270), solvent (manufactured by Pure Chemical Co., Ltd., trade name) : 40 g of methyl ethyl ketone) were mixed to produce a solvent-based ultraviolet curing adhesive, and this was heat-treated at 80 ° C. for 3 minutes, and then a high-pressure mercury lamp was used under the conditions of illuminance of 146 mW / cm ² and cumulative light amount of 866 mJ / cm ² . Except that it was irradiated with ultraviolet rays to harden it, an optical laminated body for comparison was produced using the same procedure as in Example 1.

The produced optical laminate had poor adhesion, and interlaminar peeling was observed when immersed in water at 80 ° C for one day. In addition, whitening was confirmed due to substrate corrosion caused by the solvent.

Claims (7)

An optical laminate comprising a cholesteric liquid crystal layer and a polarizing element between a first support and a second support; wherein the first support and / or the second support system contains a polyamide resin; and The solvent-free UV-curable adhesive adheres at least one combination selected from the group consisting of the following 1) to 3), 1) a first or second support and a polarizing element, 2) a first or The second support and the cholesteric liquid crystal layer, and 3) the cholesteric liquid crystal layer and the polarizing element. The optical multilayer body according to item 1 of the scope of application for a patent, wherein the polyamide resin is a nylon having an aliphatic skeleton. The optical layered body according to item 1 or 2 of the scope of application for a patent, wherein the solventless ultraviolet curing adhesive contains a urethane (meth) acrylate. A polarizing lens is an optical laminated body described in any one of the first to third aspects of the patent application. The optical multilayer body according to item 4 of the scope of application for a patent, wherein the lens base material contains a polyamide resin. The optical laminated body according to item 5 of the scope of application for a patent, wherein the polyamide resin contained in the lens substrate is a nylon having an aliphatic skeleton. An ophthalmic wearing device is a device in which a polarizing lens as described in any one of claims 4 to 6 is incorporated in a frame.