JP2016071178A - Light control member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light control member having reduced odors from a decomposition product of a photopolymerization initiator, and a window with a light control member.SOLUTION: A light control member comprises a light transmitting part formed of a photocurable resin layer and having a plurality of groove parts on one surface, and a light deflection part formed in the groove part. At least one member constituting the light control member contains a deodorant.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a light control member that takes in incident light.

  In recent years, the development of light control members that can adjust the absorption, deflection, reflection, transmission, etc. of external light for the purpose of energy saving and reduction of carbon dioxide emission due to the serious environmental problems such as global warming. Is underway.

  For example, by providing a light control member on a window glass of a house, an automobile, etc., light that enters the room through a window glass from a light source such as the sun is deflected to the ceiling side, and the deflected light is used as indirect lighting in the room Can be used. In this way, by using the daylighting function of the light control member to improve indoor illuminance, reduction of power consumption and reduction of carbon dioxide emission are expected.

  As an aspect of the light control member, in Patent Document 1, a light transmissive portion made of a light transmissive material that transmits sunlight and a light deflection portion made of a light transmissive material that deflects sunlight are unidirectional in the sheet. And a structure having an optical deflection unit group arranged at a predetermined pitch.

  When a photocurable resin is used to form the light transmissive part or the light deflection part of the light control member as described above, a photopolymerization initiator is generally added to the photocurable resin. . Such a photopolymerization initiator is decomposed by light or heat that is irradiated when the photocurable resin is cured, but depending on the molecular structure after decomposition, there are those that emit an odor such as apricot or almond. Since such an odor may be felt uncomfortable by humans, storing the product containing the photopolymerization initiator decomposition product at a certain temperature allows the photopolymerization initiator decomposition product from the product to be stored. An aging treatment that promotes release by heat is performed. However, when the odor is to be completely removed, the aging process takes 3 days or more, which causes a significant decrease in production efficiency.

  Therefore, it has been studied to change the type of the photopolymerization initiator to be used. However, by changing the type of the photopolymerization initiator, various physical characteristics of the obtained photocurable resin product are changed, and it becomes difficult to obtain a product having desired characteristics. Furthermore, when a photopolymerization initiator that is not a general-purpose product is used, there is a problem that the production cost increases.

JP 2014-126713 A

  This invention is made | formed in view of the said situation, and it aims at providing the light control member with which the odor resulting from the decomposition product of a photoinitiator was reduced.

  In order to solve the above-described problems, the present invention provides a light control member that is formed of a light-curing resin layer and includes a light transmission portion having a plurality of grooves on one surface and a light deflection portion formed in the groove. The light control member is characterized in that at least one member constituting the light control member contains a deodorant.

  According to the present invention, since at least one member constituting the light control member contains the deodorant, it is uncomfortable for some people due to the decomposition product of the photopolymerization initiator included in the light control member. The odor that can be felt can be reduced. Further, in the present invention, it is not necessary to perform an aging process or the like for removing the odor, so that an efficient light control member can be manufactured. Furthermore, by arranging the light control member of the present invention facing the internal space of a building or a vehicle, the odor of the internal space other than the odor derived from the decomposition product of the photopolymerization initiator is also reduced. Can do.

  In the said invention, it is preferable that the said light transmissive part and the said optical deflection | deviation part have a different refractive index. In general, when light travels from a high refractive index region to a low refractive index region, total reflection of light occurs at the interface between the two regions, and the amount of reflected light can be increased.

  In the said invention, it is preferable that one of the side surfaces of the said groove part extended in the film thickness direction of the said light transmissive part is a specular reflective surface. This is because the light incident on the specular reflection surface can be reflected with a high reflectivity and deflected regardless of the refractive indexes of the light transmission part and the light deflection part.

  Further, the present invention is a window with a light control member having a window material and a light control member disposed on one surface of the window material, wherein the light control member is formed of a photocurable resin layer, It has a light transmitting part having a plurality of grooves on one surface and a light deflecting part formed in the groove part, and at least one member constituting the light control member contains a deodorant. A window with a light control member is provided.

  According to the present invention, since the deodorizer is contained in at least one member constituting the light control member arranged on one surface of the window material, the light control member contains a decomposition product of the photopolymerization initiator. The odor that is uncomfortable for some people can be reduced. Further, in the present invention, it is not necessary to perform an aging process or the like for removing the odor, so that efficient production is possible. Further, in the present invention, by arranging the light control member facing the internal space of a building or a vehicle, the odor of the internal space other than the odor derived from the decomposition product of the photopolymerization initiator is also provided. Can be reduced.

  In the light control member of the present invention, the odor caused by the decomposition product of the photopolymerization initiator can be reduced, and the light control member of the present invention other than the odor derived from the decomposition product of the photopolymerization initiator There is an effect that it is possible to reduce the smell of the interior space of the building or vehicle where the vehicle is arranged.

It is a schematic perspective view which shows an example of the light control member of this invention. It is a schematic sectional drawing from the X direction of FIG. It is a schematic sectional drawing which shows an example of the shape of the groove part in this invention. It is the schematic perspective view and sectional drawing which show the other example of the light control member of this invention. It is a schematic sectional drawing which shows the other example of the light control member of this invention. It is a schematic sectional drawing which shows the other example of the light control member of this invention. It is a schematic sectional drawing which shows the other example of the light control member of this invention. It is a schematic perspective view which shows an example of the window with a light control member of this invention.

  Hereinafter, the light control member and the window with the light control member of the present invention will be described in detail.

A. Light Control Member The light control member of the present invention is a light control member that is formed of a photo-curing resin layer and has a light transmission part having a plurality of grooves on one surface and a light deflection part formed in the groove. And at least 1 member which comprises the said light control member contains the deodorizer, It is characterized by the above-mentioned.

  The light control unit of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing an example of the light control member of the present invention, and FIG. 2 is a schematic cross-sectional view seen from the X direction of FIG. 1, that is, the film thickness direction of the light control member of the present invention. As illustrated in FIGS. 1 and 2, the light control member 1 of the present invention includes a light transmission part 3 having a plurality of grooves 2 on one surface, and a light deflection part 4 </ b> A formed in the groove 2. Have.

In the light transmitting portion 3, the surface on which the light deflecting portion 4A is formed is an incident surface 5 that is a surface on which light L is incident, and the light L incident from the incident surface 5 is incident on the incident surface 5. The light is emitted from an emission surface 6 that is a surface facing the surface. In such a light control member 1, for example, the light transmission part 3 and the light deflection part 4 </ _b > A have different refractive indexes n ₁ and n ₂ , thereby extending in the film thickness d direction of the light transmission part 3. One of the side surfaces f (the interface between the light transmitting portion 3 and the light deflecting portion 4A) of the groove portion 2 is used as a light reflecting surface F that reflects the light L incident from the incident surface 5 side to the emitting surface 6 side. The amount of light collected can be increased.

  In the present invention, the light transmitting portion is formed of a photocurable resin layer obtained by curing a photocurable resin, and a photopolymerization initiator is usually used for curing such a photocurable resin. The photopolymerization initiator used in the present invention is a general one that has been used for curing photocurable resins. Therefore, in the conventional photo-curing resin film and the like, there are decomposition products of the photopolymerization initiator that emit an odor like apricot kernel or almond as described above.

  One method for obtaining good lighting performance in the light control member having the light transmission part and the light deflection part as described above is to reflect light incident at various angles on the upper surface of the light deflection part. Can do. This method is intended to improve the daylighting performance by increasing the angle at which incident light passes between adjacent light deflecting units. To that end, the pitch of the light deflecting units is reduced or the height is increased. It needs to be bigger.

  In order to increase the height of the light deflecting portion, it is necessary to increase the thickness of the light transmitting portion where the groove portion is formed. To obtain good lighting performance, the thickness of the light transmitting portion is set to 100 μm. It is necessary to do more. In order to form a light transmission part with a film thickness exceeding 100 μm, a large amount of photocurable resin is required as a material, and as a result, the amount of photopolymerization initiator added for curing the photocurable resin also increases. To do. As described above, when an amount of the photopolymerization initiator that cannot be compared with the amount of the photopolymerization initiator that has been used for the conventional resin film having a small film thickness is used in the light control member, The odor derived from the decomposition product of the polymerization initiator cannot be ignored.

  According to the present invention, since at least one member constituting the light control member contains the deodorant, it is uncomfortable for some people due to the decomposition product of the photopolymerization initiator included in the light control member. The odor that can be felt can be reduced. Further, in the present invention, it is not necessary to perform an aging process or the like for removing the odor, so that an efficient light control member can be manufactured.

  The light control member of the present invention can be used for an opening of a building, a vehicle, or the like, and can control light incident from the outside. There are various odor-causing substances such as tobacco and tobacco. In the present invention, by disposing the light control member containing the deodorant so as to face the internal space, not only a decomposition product of the photopolymerization initiator but also other light control members around the light control member. The deodorizing effect is exerted also on the odor causing substance, and the odor in the internal space can be reduced.

  Hereinafter, the light control member of the present invention will be described separately for the deodorant used and the structure of the light control member.

1. Deodorant First, the deodorant contained in the light control member of the present invention will be described.
The deodorant in the present invention is contained in at least one member constituting the light control member. The kind of the deodorant is not particularly limited as long as it can reduce the odor derived from the decomposition product of the photopolymerization initiator. For example, the deodorizer has physical adsorptivity, chemical adsorptivity. Or a decomposition reaction catalyst substance. Each will be described below.

(1) Deodorant having physical adsorptivity Since the deodorant having physical adsorptivity physically adsorbs odor-causing substances, it constitutes a member on the side to which the deodorant is added. There is little concern about deteriorating the material by reacting with the material to be decomposed or by decomposing the material. Therefore, the range of material selection on the side to be added can be expanded by using a deodorant having physical adsorptivity. From such a viewpoint, in the present invention, a deodorant having physical adsorptivity is preferably used.

The deodorant having such a physical adsorptivity is not particularly limited as long as it can exert a deodorizing effect by physically adsorbing the odor-causing substance, for example, an inorganic porous material. Etc. can be used. Specific examples of the inorganic porous material include activated carbon, impregnated activated carbon, bamboo charcoal, activated clay, natural zeolite, synthetic zeolite, bentonite, sepiolite, shirasu, silica, silica-magnesia, molecular sieve, zirconium phosphate, aluminum phosphate, Hydroxyapatite, Otani stone (quartz rough surface tuff), etc. can be used.
Of these, natural zeolite, synthetic zeolite, zirconium phosphate, aluminum phosphate, and hydroxyapatite are preferably used in the present invention.

  The content of the deodorant having physical adsorptivity is appropriately adjusted depending on the type of the deodorant used, and is particularly limited as long as it is an amount capable of exhibiting the deodorant effect. It is not a thing. For example, in this invention, the deodorizer which has physical adsorptivity with respect to 100 mass parts of photocurable resins used for all the members which comprise a light control member is the range of 0.5 mass part-30 mass parts. Of these, an amount in the range of 3 to 20 parts by mass can be added to the member constituting the light control member. If the addition amount is less than the above range, a sufficient deodorizing effect may not be obtained. If the addition amount exceeds the above range, various physical properties of the added member such as transparency, refractive index, adhesion, etc. This is because it may affect the situation.

(2) Deodorant having chemical adsorptivity In the present invention, a deodorant of a type that chemically adsorbs the odor-causing substance can be used. Deodorizers that chemically adsorb odor-causing substances form chemical bonds (covalent bonds) with odor components, so the adsorbed odor-causing substances are not easily detached and can be re-released. Has the advantage of very low performance.

The deodorant having such a chemical adsorptivity is not particularly limited as long as it can exhibit a deodorizing effect by chemically adsorbing the odor-causing substance, for example, an organic material. Alternatively, organic / inorganic hybrid materials can be used. As the organic material, a material obtained by adding a functional group such as COOH or NH ₂ to a styrenedivinylbenzene copolymer can be used. As the organic / inorganic hybrid material, a material in which an organic compound such as a hydroxyl group or an amine is supported on an inorganic agent can be used.

  The content of the deodorant having chemical adsorptivity is appropriately adjusted depending on the type of the deodorant used, and is particularly limited as long as the amount can exhibit the deodorant effect. It is not a thing. For example, in this invention, the deodorizer which has a chemical adsorptivity is 0.5 mass part-30 mass parts with respect to 100 mass parts of photocurable resins used for all the materials which comprise a light control member. Of these, an amount in the range of 3 to 20 parts by mass can be added to the member constituting the light control member. If the addition amount is less than the above range, a sufficient deodorizing effect may not be obtained. If the addition amount exceeds the above range, various physical properties of the added member such as transparency, refractive index, adhesion, etc. This is because it may affect the situation.

(3) Decomposition reaction catalyst substance Decomposition reaction catalyst substance that exerts a deodorizing effect by acting as a catalyst has a long deodorizing effect, so that not only a decomposition product of a photopolymerization initiator but also a light control member A higher deodorizing effect can be exerted against other odor-causing substances in the vicinity. From such a viewpoint, in the present invention, the decomposition reaction catalyst substance is suitably used as a deodorant.

  Such a decomposition reaction catalyst material is not particularly limited as long as it can decompose the decomposition product of the photopolymerization initiator and reduce the odor, and for example, a non-photocatalyst can be used. Since the non-photocatalyst exhibits a milder catalytic action than a photocatalyst or the like, there is little risk of decomposing the organic component even when combined with an organic binder or the like, and a light control member having excellent long-term durability is provided. Can be provided.

As such a non-photocatalyst, for example, an inorganic material containing a metal such as titanium, iron, platinum, silver, palladium, zirconium, germanium, cerium, potassium, aluminum, gallium, cobalt, or nickel can be used. Specific examples include titanium phosphate compounds, iron oxide, and the like, and materials known as charge transfer catalysts (CT catalysts) as described in, for example, JP-A No. 2002-1121 can be used. Said non-photocatalyst can be used individually by 1 type or in combination of 2 or more types. Of these, a titanium phosphate compound is most preferable from the viewpoint of effects. Examples of the titanium phosphate compound include Ti (OH) (H ₂ PO ₄ ) ₂ (OR), Ti (OH) (PO ₄ ), Ti (OH) ₂ (H ₂ PO ₄ ) (OR), Ti (OH) (HPO ₄ ) (OR), Ti (OH) (HPO ₄ ) (H ₂ PO ₄ ), Ti (OH) ₂ (H ₂ PO ₄ ) ₂ , Ti (OH) ₃ (H ₂ PO ₄ ) Or these condensates etc. can be used. Here, R is an alkyl group having 1 to 4 carbon atoms.

  The content of the decomposition reaction catalyst substance is appropriately adjusted depending on the kind of the decomposition reaction catalyst substance to be used, and is not particularly limited as long as it is an amount capable of exhibiting a deodorizing effect. For example, in the present invention, the decomposition reaction catalyst substance is in the range of 0.5 to 30 parts by mass, particularly 3 parts by mass with respect to 100 parts by mass of the photocurable resin used for all members constituting the light control member. In an amount within the range of 20 parts by mass to 20 parts by mass, it can be added to the member constituting the light control member. If the addition amount is less than the above range, a sufficient deodorizing effect may not be obtained. If the addition amount exceeds the above range, various physical properties of the added member such as transparency, refractive index, adhesion, etc. This is because it may affect the situation.

(4) Deodorant The above-mentioned various deodorants may be used alone or in combination with a plurality of different types of deodorants. Moreover, the said deodorizer may be contained in only one of the members which comprise a light control member, or may be contained in the said several member. For example, even if the deodorant having the physical adsorption property is contained only in the light deflection unit, the deodorant having the physical adsorption property may be contained in both the light deflection unit and the light transmission unit. Further, for example, when the light control member has an overcoat layer, a deodorant having chemical adsorptivity may be contained in the light deflection unit, and a decomposition reaction catalyst substance may be contained in the overcoat layer. .

  The type of deodorant as described above, the amount of deodorant to be added, and which member to add are the physical properties and processing of the deodorant and the material constituting the member to which the deodorant is added. It can be appropriately adjusted in consideration of the properties and the like. For example, when a deodorant having a high refractive index is used, it may be contained in a member whose refractive index is desired to be increased.

2. Next, the configuration of the light control member of the present invention will be described.
As a member constituting the light control member of the present invention, the light control member has a light transmission part formed of a photo-curing resin layer and having a plurality of grooves on one surface, and a light deflection part formed in the groove. If it is not specifically limited, you may have structures other than the said light transmission part and light deflection | deviation part, such as a base material and an adhesion layer.
Hereinafter, each structure of the light control member of this invention is demonstrated.

(1) Light transmission part The light transmission part in this invention is formed with the photocuring resin layer, and has a some groove part in one surface. Such a light transmission part will be described separately for each of a groove part and a part (light transmission part) formed of a photo-curing resin layer.

(A) Groove part In this invention, the said groove part is normally formed in multiple numbers by the entrance plane side of a light transmissive part.
Examples of the opening shape of the groove portion viewed from the incident surface side of the light transmission portion include a straight shape and a curved shape. Moreover, the adjacent groove portions may be formed in parallel, may be formed randomly, or may be formed intersecting each other. Among these, it is preferable that the plurality of grooves are linear and formed in parallel. The length of such a groove is not particularly limited, and can be appropriately set according to the use of the light control member of the present invention. The length of the groove means the length in the longitudinal direction of the groove opening as viewed from the incident surface side.

  The shape of the groove portion as viewed from the film thickness direction of the light transmission portion, that is, the cross-sectional shape of the groove portion is not particularly limited, and can be appropriately designed to a shape that easily exhibits the light control function by the light deflection portion. The side surface forming the cross section of the groove portion may be a plane orthogonal to the incident surface and the emission surface, may have an inclined surface at least partially, and the groove side surface is inclined with respect to the incident surface. It may be a multi-stage shape having a plurality of different surfaces.

  Specific examples of the cross-sectional shape of the groove include a triangle (FIG. 3A), a rectangle (FIG. 3B), a wedge shape (FIG. 3C), a polygon (FIG. 3D), and the like. It is done. Moreover, as shown in FIG.3 (e), a part may be curving in at least one among the side surfaces f (interface of the light transmissive part 3 and the light deflection | deviation part 4A) of the groove part 2. FIG. Furthermore, the corners of the grooves may have a curvature. FIG. 3 is a schematic sectional view showing an example of the shape of the groove in the present invention.

The width of the groove is not particularly limited as long as a desired light control function can be obtained, but the length of the widest portion is within a range of 5 μm to 150 μm, and particularly within a range of 10 μm to 100 μm. In particular, the thickness is preferably in the range of 15 μm to 50 μm. If the width of the widest portion of the groove is larger than the above range, light may not be easily transmitted through the light transmitting portion and the light deflecting portion. On the other hand, if the width is smaller than the above range, a desired function may be achieved in the light deflecting portion. This is because there is a case where it cannot be fulfilled.
Note that the width of the groove means the width of the light deflection unit, and is, for example, a portion indicated by a in FIG.

The depth of the groove is not limited as long as the optical deflection unit included in the groove can exhibit a desired function. For example, the depth is in the range of 10 μm to 250 μm, in particular in the range of 30 μm to 200 μm, in particular 50 μm. It is preferable to be within a range of ˜200 μm. At this time, the depth of the groove is preferably 50% or more with respect to the film thickness of the light transmission portion, and more preferably within the range of 70% to 90%.
Note that the depth of the groove portion means the length from the incident surface of the light transmitting portion to the tip of the concave portion of the groove portion, that is, the film thickness of the light deflection portion, and is, for example, a portion indicated by b in FIG.

  In the present invention, the plurality of groove portions may be formed at equal intervals, or may be formed at different intervals. The pitch width of the grooves, that is, the distance between the arrangements of the light deflecting portions may be any length as long as the desired light control function can be achieved, and the length of the widest portion is in the range of 15 μm to 200 μm, particularly 20 μm to 150 μm. It is preferable that it exists in the range of 25 micrometers-100 micrometers especially. The inter-groove distance is, for example, a portion indicated by c in FIG.

(B) Light transmission part The light transmission part in this invention should just have a some groove part as mentioned above, and should be formed with the photocuring resin layer, and a photocurable resin is hardened | cured. Here, “photocuring” includes not only visible light but also light cured by light having a wavelength from ultraviolet light to infrared light.

  The photocurable resin which is a material for forming such a light transmission part is not particularly limited, and an ultraviolet curable resin, a visible light curable resin, a near infrared curable resin, or the like can be used. . Among these, UV curable resins are preferable from the viewpoints of versatility, curability, and light transmittance.

  As said ultraviolet curable resin, it can select from the polymerizable oligomer thru | or prepolymer conventionally used conventionally, and can be used suitably. Examples thereof include polymerizable oligomers or prepolymers, and particularly polyfunctional polymerizable oligomers or prepolymers.

  As the polymerizable oligomer or prepolymer, an oligomer or prepolymer having a radically polymerizable unsaturated group in the molecule is preferable, and a (meth) acrylate oligomer or prepolymer is particularly preferable. Specifically, epoxy (meth) acrylate, urethane (meth) acrylate, polyether urethane (meth) acrylate, caprolactone urethane (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate Oligomers, prepolymers, and the like. These may be used alone or in combination of two or more. (Meth) acrylate refers to acrylate or methacrylate.

  In addition, when using polyfunctional urethane (meth) acrylate, you may use monofunctional (meth) acrylates, such as methyl (meth) acrylate, according to the objective. The monofunctional (meth) acrylate may be used alone or in combination of two or more, or a low molecular weight polyfunctional (meth) acrylate may be used in combination.

  In addition to the above polymerizable oligomers or prepolymers, reactive monomers such as polythiols, reactive monomers such as vinyl pyrrolidone, 2-ethylhexyl acrylate, β-hydroxy acrylate, and tetrahydrofurfuryl acrylate may be used. .

  The light transmission part preferably contains a photopolymerization initiator. Examples of the photopolymerization initiator include hydroxybenzoyl compounds (2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, benzoin alkyl ether, etc.), benzoylformate compounds (methyl). Benzoylformate, etc.), thioxanthone compounds (isopropylthioxanthone, etc.), benzophenones (benzophenone, etc.), phosphate compounds (1,3,5-trimethylbenzoyldiphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenyl Phosphine oxide, etc.) and benzyldimethyl ketal. Among these, an irradiation device for curing the photocurable resin composition, curability of the photocurable resin composition, and the like can be arbitrarily selected. Of these, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, and bis (2,4,6-trimethylbenzoyl) -phenylphosphine from the viewpoint of preventing coloring of the light transmitting portion. Oxides are preferred. Among the above photopolymerization initiators, 1-hydroxycyclohexyl phenyl ketone and the like have a strong smell of decomposition products, and thus the effects of the present invention are particularly exerted. In addition, as content of the said photoinitiator, about 0.1 mass part-10 mass parts are preferable with respect to 100 mass parts of photocurable resins.

  In addition to the above-mentioned photo-curable resin, the light transmission part includes weather resistance improvers such as ultraviolet absorbers and light stabilizers, antioxidants, crosslinking agents, hard coat agents, scratch-resistant fillers, polymerization inhibitors, and antistatic agents. You may contain additives, such as an agent, a leveling agent, a thixotropic agent, a coupling agent, a plasticizer, an antifoamer, and a filler.

  In the present invention, the light transmission part may contain a deodorant. Since the decomposition product of the above-mentioned photopolymerization initiator, which is the cause of odor, is contained in the light transmission part in the light control member in particular, the light transmission part contains a deodorant. It is because it can raise. The light transmissive part containing the deodorant can be obtained by, for example, irradiating and curing the light after containing the deodorant in the uncured photocurable resin.

  The refractive index of the light transmission part is not particularly limited as long as it has a size capable of exhibiting a desired light control function, but the light transmission part and the light deflection part preferably have different refractive indexes. Utilizing the relationship in refractive index between the light transmitting part and the light deflecting part, one of the side surfaces of the groove part extending in the film thickness direction of the light transmitting part is used as the light exiting surface from the incident surface side. This is because the light reflecting surface can be reflected to the side, and the light can be controlled without significantly reducing the light transmittance of the entire light control member. Therefore, it is preferable that the light transmission part and the light deflection part have a refractive index difference which will be described later.

  In this case, the refractive index of the light transmitting portion is preferably in the range of 1.40 to 1.80, and particularly preferably in the range of 1.45 to 1.65. In the present specification, the refractive index means a refractive index value at a wavelength of 589 nm measured using a multi-wavelength Abbe refractometer (manufactured by Atago Co., Ltd.).

  The film thickness of the light transmission portion is not particularly limited as long as the light control member of the present invention is a size that can exhibit a desired light control function, and is appropriately selected according to the depth of the groove portion. is there. For example, it can be in the range of 100 μm to 300 μm, in particular in the range of 100 μm to 250 μm, in particular in the range of 130 μm to 250 μm. When the film thickness of the light transmission part is larger than the above range, the light transmittance may be lowered. This is because there are cases where it cannot be obtained. In addition, the film thickness of the light transmission part means the length from the incident surface to the emission surface, that is, the film thickness of the light curable resin layer constituting the light transmission part (portion indicated by d in FIG. 2).

  The light transmitting portion preferably has high light transmittance. For example, the visible light transmittance is preferably 70% or more, more preferably 80% or more, and particularly preferably 90% or more. The visible light transmittance was measured using a infrared visible ultraviolet spectrophotometer (UV3100PC, manufactured by Shimadzu Corporation) and measured in the wavelength range of 380 nm to 780 nm according to JIS A5759-2008. It is calculated by the calculation formula prescribed in 1. A similar measurement method is used for visible light transmittance in each member constituting the light control member of the present invention described below.

(2) Light Deflection Part The light deflection part in the present invention is not limited as long as it is formed in the groove part of the light transmission part. For example, as illustrated in FIGS. 1 and 2, the groove part contains a resin. It may be a resin layer 4A filled with a composition for forming a light deflection part, or may be an air layer 4B in the groove part 2 as illustrated in FIG. 4A is a schematic perspective view showing another example of the light control member of the present invention, and FIG. 4B is the X direction of FIG. 4A, that is, the film of the light transmitting portion in the present invention. It is the schematic sectional drawing seen from the thickness direction.

  Hereinafter, the light deflection unit will be described separately for a resin layer and an air layer.

(A) Resin layer The light deflection section in the present invention may be a resin layer formed by filling the groove with a composition for forming a light deflection section containing a resin. Examples of the resin used for the resin layer include an ionizing radiation curable resin. Examples of the ionizing radiation curable resin include an ultraviolet curable resin, an electron beam curable resin, a visible light curable resin, a near infrared curable resin, and the like, among which an ultraviolet curable resin and an electron beam curable resin are used. It is preferable. The ultraviolet curable resin and the electron beam curable resin can be appropriately selected from conventionally used polymerizable oligomers or prepolymers.

  As the polymerizable oligomer or prepolymer, an oligomer or prepolymer having a radically polymerizable unsaturated group in the molecule is preferable, and a (meth) acrylate oligomer or prepolymer is particularly preferable. Specifically, epoxy (meth) acrylate, urethane (meth) acrylate, polyether urethane (meth) acrylate, caprolactone urethane (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate Oligomers, prepolymers, and the like.

  In addition, reactive oligomers such as polythiols, reactive monomers such as vinyl pyrrolidone, 2-ethylhexyl acrylate, β-hydroxy acrylate, and tetrahydrofurfuryl acrylate may be used. These may be used alone or in combination of two or more. (Meth) acrylate refers to acrylate or methacrylate.

  The resin layer preferably contains a photopolymerization initiator. This is because it can be cured by irradiation with ionizing radiation such as ultraviolet rays having a wavelength region of 300 nm to 400 nm. Examples of the photopolymerization initiator include hydroxybenzoyl compounds (2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, benzoin alkyl ether, etc.), benzoylformate compounds (methyl). Benzoylformate, etc.), thioxanthone compounds (isopropylthioxanthone, etc.), benzophenones (benzophenone, etc.), phosphate compounds (1,3,5-trimethylbenzoyldiphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenyl Phosphine oxide, etc.) and benzyldimethyl ketal. Among these, an irradiation device for curing the photocurable resin composition, curability of the photocurable resin composition, and the like can be arbitrarily selected. Of these, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, and bis (2,4,6-trimethylbenzoyl) -phenylphosphine from the viewpoint of preventing coloring of the light transmitting portion. Oxides are preferred.

  The resin layer may contain an additive as necessary. Examples of additives include weather resistance improvers such as ultraviolet absorbers and light stabilizers, polymerization inhibitors, crosslinking agents, antistatic agents, adhesion improvers, antioxidants, leveling agents, thixotropic agents, and couplings. Agents, plasticizers, antifoaming agents, fillers and the like.

  The resin layer that is the light deflector may contain a deodorant. When the deodorant is contained in a member formed in a layer (film) shape, the deodorant contained in the member becomes a foreign substance, and the adhesion and peelability of the member may be reduced. However, since the light deflection part can be formed by filling the groove with the uncured resin and irradiating it with energy to cure it, even if the uncured resin contains a deodorant, Manufacture etc. can be performed similarly to the case where it does not contain a deodorant. Therefore, in consideration of the workability of each member constituting the light control member, it is preferable that the light deflection unit contains a deodorant.

  Although the refractive index of the said resin layer is not specifically limited, It is preferable to have a refractive index different from the refractive index of the said light transmissive part. Among them, the refractive index is preferably lower than the refractive index of the light transmission part, and the refractive index of the light deflection part is, for example, in the range of 1.40 to 1.80, and in particular 1.40 to 1.65. Can be within the range.

  The resin layer that is the light deflection section preferably has high light transmittance from the viewpoint of visibility. For example, the visible light transmittance is preferably 70% or more, and more preferably 75% or more, particularly 80%. The above is preferable.

(B) Air layer The light deflector in the present invention may be an air layer. Since the refractive index of air is usually about 1.0 and is lower than the refractive index of the resin normally used for the above-described light transmission part, the interface between the light transmission part and the light deflection part (that is, the side surface of the groove part) is different. Refractive index interface.

  In the present embodiment, when the light deflection unit contains a deodorant, a deodorant having a relatively large average particle diameter can be used. As an average particle diameter in this case, for example, a particle diameter in the range of 0.1 μm to 7 μm, particularly in the range of 0.3 μm to 5 μm can be used. The average particle size of the deodorant is measured by a particle size measuring device (SALD2000J, manufactured by Shimadzu Corporation) using a laser diffraction scattering method.

  About the width | variety of the said optical deflection | deviation part, a film thickness, a shape, and the distance between arrangement | positioning, it can be made to be the same as that of the width | variety of the groove part mentioned above, a depth, a shape, and the distance between groove parts.

(3) Side surface of groove portion In the present invention, the “side surface of the groove portion” refers to a plurality of interfaces between the light transmission portion and the light deflection portion that extend in the film thickness direction of the light transmission portion. It is a part shown by f in FIG. As shown in FIG. 3D, the side surface f of the groove portion extending in the film thickness direction of the light transmission portion may be composed of a surface f1 and a surface f2 having different inclination angles.

  In the present invention, since the light transmitting portion and the light deflecting portion have different refractive indexes, the side surface of the groove portion can be used as a different refractive index interface, and a metal film or the like is formed on the side surface of the groove portion. As a result, the side surface of the groove can be used as a specular reflection surface. Hereinafter, the side surfaces of the groove will be described separately for the different refractive index interface and the specular reflection surface.

(A) Different refractive index interface When the side surface of the groove is a different refractive index interface, it is preferable that the refractive index difference between the light transmitting portion and the light deflecting portion is larger. This is because reflection of incident light is likely to occur on the light reflecting surface that is the interface of the different refractive index, and the amount of light collected can be increased. Specifically, the refractive index difference is 0.03 or more,
In particular, it is preferably 0.05 or more. If the difference in refractive index is less than the above range, when chromatic dispersion of total reflection occurs, the long wavelength component may not be totally reflected, and only the short wavelength component may be totally reflected, resulting in a change in daylighting color. Because there is a case to do.

  When the side surface of the groove part is a different refractive index interface, one of the side surfaces of the two groove parts becomes a light reflection surface that reflects light incident from the incident surface side to the emission surface side. The interface that faces the light reflecting surface may be referred to as a “facing surface”. Hereinafter, each of the light reflecting surface and the facing surface will be described.

(I) Light reflecting surface It is preferable that the light reflecting surface has high smoothness in order to reflect a lot of light. Specifically, the arithmetic average roughness (Ra) of the light reflecting surface is preferably 50 nm or less, more preferably 25 nm or less, and particularly preferably 10 nm or less. If the arithmetic average roughness (Ra) of the light reflecting surface is larger than the above upper limit value, light scattering tends to occur on the light reflecting surface, and the daylighting function may deteriorate due to a decrease in the amount of light collected.

  In addition, the value of arithmetic mean roughness (Ra) is calculated | required by the measuring method using a non-contact-type white interferometer, and the measuring method by cross-sectional observation using a scanning electron microscope (SEM). The measurement method using a non-contact type white interferometer is an arithmetic average roughness (Ra) using a non-contact type white interferometer (Zygo NewView 6200, manufactured by Canon Inc.) and measuring a three-point average value measured in a measurement range of 50 μm × 50 μm. ). In addition, the measurement method by cross-sectional observation using a scanning electron microscope (SEM) is a method of observing a cross-section by SEM at 23 ° C. according to JIS B0601 2001, and from the obtained image, an interface outline (roughness). The value calculated by the following method is taken as the arithmetic average roughness (Ra).

(Calculation method of arithmetic average roughness (Ra))
Only the reference length is extracted from the roughness curve in the direction of the average line, the X-axis is taken in the direction of the average line of the extracted portion, the Y-axis is taken in the direction of the vertical magnification, and the roughness curve is expressed as y = f (x) The value obtained by the following formula (1) is expressed in micrometers (nm) as a calculated value.

  Examples of the method for making the light reflecting surface a smooth surface having the above-described surface roughness include a method of subjecting at least one side surface of the groove portion to a surface treatment such as chemical polishing or mechanical polishing. In addition, when a light transmitting part having a groove is transferred and formed using a mold having a protruding part, surface treatment is performed on at least one of the side surfaces in the longitudinal direction of the protruding part to transfer and form the light transmitting part. Thus, the light reflecting surface can be a smooth surface.

  The shape of the light reflecting surface viewed from the film thickness direction of the light control member may be a plane orthogonal to the incident surface and the emitting surface, and may have an inclined surface at least partially, with respect to the incident surface. A plurality of surfaces having different inclination angles may be provided. In the present invention, it is appropriately designed depending on the shape of the side surface of the groove.

(Ii) Opposing surface The opposing surface may be a light reflecting surface or a light scattering surface. Of these, the opposing surface is preferably a light scattering surface. This is because by making the opposite surface a light scattering surface, it is possible to scatter incident light and deflect a part of the scattered light. Moreover, it is because the glare-proof effect by reduction of direct light is acquired by scattering light in the said opposing surface.

The arithmetic average roughness (Ra) when the facing surface is a light scattering surface may be any roughness that can exhibit a scattering effect, and is preferably 50 nm or more, particularly 100 nm or more, particularly 200 nm or more. . In addition, as an upper limit of the said arithmetic mean roughness (Ra), it is preferable that it is 1000 nm or less.
The arithmetic average roughness is a value measured by the same measuring method as the arithmetic average roughness of the light reflecting surface.

  Examples of the method of using the opposing surface as a light scattering surface include a method in which one side surface of the groove is roughened by a surface treatment such as plasma treatment, corona discharge treatment, or UV ozone treatment. In addition, when a light transmitting part having a groove is transferred and formed using a mold having a protruding part, surface treatment is performed on the side surface in the longitudinal direction of the protruding part, and the light transmitting part is transferred and formed. It is also possible to form a light scattering surface having a roughened side surface.

  The shape of the facing surface is not particularly limited, and is appropriately designed depending on the shape of the groove side surface.

(B) Specular reflection surface In the present invention, by making the side surface of the groove part a mirror reflection surface, the light incident on the mirror reflection surface is high regardless of the refractive indexes of the light transmission part and the light deflection part. The light can be deflected by reflection with reflectivity. In such a specular reflection surface, a metal film is formed on at least one of the side surfaces of the groove portion, and a “first mode” in which the side surface of the groove portion on which the metal film is formed is a specular reflection surface; By forming the light deflecting portion including particles, the groove portion can be divided into a “second mode” in which the side surface of the groove portion is a specular reflection surface. Each will be described below.

(I) 1st aspect In this aspect, the metal film is formed in at least one of the side surfaces of a groove part, and the side surface of the groove part in which the said metal film was formed is used as the light reflection surface which is a specular reflection surface. is there.

  In the light control member of this aspect, as illustrated in FIG. 5, the metal film 21 is formed on the side surface f of the two groove portions 2 by forming the metal film 21 on at least one of the side surfaces f of the groove portion 2. The side surface f of the groove portion 2 is a light reflecting surface F that is a specular reflecting surface.

  In this embodiment, the difference in refractive index between the light transmission part and the light deflection part is not particularly limited. Further, the light deflection unit may be a resin layer or an air layer.

  In this embodiment, examples of the metal film formed on the side surface of the groove include a metal plating layer and a metal vapor deposition film. The metal used for the metal film is not particularly limited as long as it is a material capable of exhibiting a desired reflectance, and a metal material generally used as a metal reflection film such as silver or aluminum can be used.

  The film thickness of the metal film is not particularly limited, and can be appropriately designed depending on the type and formation method of the metal film.

  The metal film only needs to be formed on at least one of the side surfaces of the groove part, and may be formed on the entire surface of the groove part (interface between the light transmission part and the light deflection part). When the metal film is formed over the entire surface of the groove, the opposing surface can also be a light reflecting surface.

  The method for forming the metal film on the side surface of the groove is not particularly limited, and can be appropriately designed depending on the type of the metal film. For example, a general plating method, vapor deposition method, spray coating method, die coating method, screen printing method, wiping method, or the like can be used.

(Ii) Second Aspect In this aspect, the side surface of the groove portion is used as a specular reflection surface by forming a light deflection portion including metal particles in the groove portion. The light deflecting unit of this aspect is the same as the content described in the section “(2) Light deflecting unit” except that it includes metal particles to be described later.

  In the light control member of this aspect, as illustrated in FIG. 6, the light reflecting portion 4 </ b> C including the metal particles 22 is formed in the groove portion 2, so that the side surface f of the groove portion 2 is a mirror reflection surface. It becomes surface F.

(4) Arbitrary member The light control member of this invention may have arbitrary members other than the light transmission part and light deflection | deviation part which were mentioned above. FIG. 7 is a schematic cross-sectional view showing another example of the light control member of the present invention. As illustrated in FIG. 7, the light control member 1 of the present invention may have a base material 31 for increasing mechanical strength. Moreover, you may have the adhesion layer 32 for bonding the light control member 1 to desired members, such as a window glass, and the adhesion component of the said adhesion layer 32 transfers to the light transmissive part 3 and the light deflection | deviation part 4A. You may have the overcoat layer 33 aiming at preventing this. Further, the light control member 1 may have a hard coat layer 34 for the purpose of improving weather resistance and scratch resistance. Note that the light transmission unit 3 and the light deflection unit 4A in FIG. 7 are the same as those in FIG. 1 and FIG.
Hereinafter, the assumed arbitrary members will be described.

(A) Transparent substrate In the present invention, the light control member may have a transparent substrate from the viewpoint of increasing the mechanical strength. As such a transparent substrate, for example, a resin film, a resin sheet, or the like can be used. The resin used for the resin film and the resin sheet may be one having high light transmittance, and examples thereof include polyethylene terephthalate, polycarbonate, polyester, polyurethane, polyvinyl alcohol, vinyl chloride, fluororesin, and rubber. Moreover, the said base material may contain antioxidant, a ultraviolet absorber, etc.

  In addition, the transparent base material may perform the surface treatment etc. on the single side | surface or both surfaces as needed. As said surface treatment, the method generally used for the surface treatment of a resin base material is mentioned.

  The film thickness of the transparent substrate can be appropriately selected according to the use of the light control member of the present invention, but is preferably in the range of 5 μm to 200 μm, for example, in particular in the range of 10 μm to 150 μm. Preferably there is.

  Although it does not specifically limit as an arrangement position of a transparent base material, it is preferred that a transparent base material is arranged at the outgoing radiation side of the above-mentioned light control member.

(B) Adhesive layer The light control member of this invention may have the adhesive layer for making it bond to desired members, such as a window glass and a base material.
Although it does not specifically limit as an adhesion layer, For example, what uses a rubber-type, an acryl-type, an olefin type, a polyester-type, a polyurethane-type adhesive, etc. as an adhesive main ingredient is mentioned. Examples of such an adhesive layer include a pressure-sensitive adhesive layer.

  The thickness of the pressure-sensitive adhesive layer is not particularly limited as long as the light control member of the present invention can be bonded to a desired member, and is preferably in the range of 5 μm to 100 μm, for example, in the range of 10 μm to 75 μm. Is preferred.

  The adhesive layer may be provided on the incident surface side of the light control member, or may be provided on the output surface side, and can be appropriately selected according to the use mode of the light control member of the present invention. , Provided on the incident surface side. By providing an adhesive layer on the incident surface side of the light control member, the light control member can be attached to the window glass of an existing building or vehicle from the indoor side, and light incident from the outside can be controlled. .

(C) Overcoat layer In the present invention, the light control member may have an overcoat layer. For example, when the light control unit of the present invention has an adhesive layer, by providing an overcoat layer between the adhesive layer and the light transmission unit (light deflecting unit), the adhesive component contained in the adhesive layer is light. It is possible to prevent the light transmission unit and the light deflection unit from being deteriorated by shifting to the transmission unit and the light deflection unit.

  The material for the overcoat layer is not particularly limited as long as it is transparent, and resins generally used in the field of transparent sheets can be used. Moreover, the film thickness of an overcoat layer will not be specifically limited if the function is fully exhibited, but generally it exists in the range of 0.1 micrometer-10 micrometers.

(D) Hard Coat Layer The light control member of the present invention may have a hard coat layer for the purpose of improving weather resistance and scratch resistance. The material for such a hard coat layer is not particularly limited as long as it is transparent, and can be the same as that generally used in the field of transparent sheets.

  The film thickness of the hard coat layer is not particularly limited as long as the function is sufficiently exhibited, but it is preferably in the range of 0.1 μm to 100 μm, for example. The hard coat layer is preferably arranged so as to be the outermost layer when the light control member is bonded to the window material.

(E) Other members In addition to the above-described members, the light control member of the present invention may have, for example, a planarization layer from the viewpoint of suppressing light diffraction and interference on the incident surface.

3. Light Control Member In the present invention, a deodorant is contained in at least one of the light control members as described above. Even if the deodorizer is contained in only one member constituting the light control member, such as a light transmission part, a light deflection part, an overcoat layer, etc., it is added to two or more members constituting the light control member. It may be contained.

  The total light transmittance of such a light control member is preferably 50% or more, more preferably 60% or more, still more preferably 70% or more, and particularly preferably 80% or more. When the total light transmittance falls within the above range, the transparency of the light control member of the present invention is improved, the design property can be kept good, and a desired light control function can be obtained. . In addition, the said total light transmittance shall be measured according to prescription | regulation of JISK7375.

4). Manufacturing Method of Light Control Member In the present invention, the manufacturing method of the light control member is not particularly limited as long as a desired light control member can be obtained. For example, it can be formed by the following method. First, using the shaping plate having a plurality of convex portions corresponding to the inverted shape of the groove portion, the surface having the convex portions of the shaping plate on the coating layer of the composition for forming a light transmitting portion containing a photocurable resin The shape is transferred and cured to form a light transmission part composed of a photo-curing resin layer having a plurality of grooves on the surface. By filling the groove part with a composition for forming a light deflection part containing a material for the light deflection part such as resin and metal particles according to the specification of the light deflection part, and curing the material according to the material, the light deflection part Can be formed. At this time, by adding a deodorant to the composition for forming the member, the member can contain the deodorant. Moreover, it can be set as the light deflection | deviation part which consists of an air layer by not filling the material of the said light deflection | deviation part in the said groove part.

5. Method of Using Light Control Member The light control member as described above can be used in various forms. Hereinafter, each form in which use of the light control member of the present invention is assumed will be described.
(A) Light Control Film The light control member of the present invention may be in the form of a film or a film having an adhesive layer. For example, when an adhesive is provided on the incident surface side of the light control member, the light taken in from the outside can be controlled by sticking such a light control film to a building or a vehicle window from the inside.

(B) Roll screen The light control member of the present invention can be used for a roll screen. A general roll screen is one in which the screen is wound up and down by a spring built in a main body portion such as a pipe, and the screen can be stopped at a desired height. For example, the light control member of the present invention can be used as a roll screen by disposing the light control member of the present invention on one surface of the screen base material via an adhesive layer to form the screen.

(C) Blind The light control member of the present invention can also be used as a blind. A general blind is one in which long strips of metal or plastic (slats) are connected by a thread, and the angle of the slats can be adjusted with a stick or string, and can be rolled up when not needed. is there. For example, by using the slat as a light control member of the present invention formed on a substrate, the light control member of the present invention can be used as a blind.

(D) Screen door The light control member of the present invention can also be used as a screen door. For example, the light control member of the present invention can be used as a screen door by forming the light control member of the present invention in a film shape and providing a large number of pores in the light control member formed in the film shape.

(E) Door The light control member of the present invention can also be used as a door. A general door has a plate-shaped member, but the light control member of the present invention is used as a door by constituting a part or all of the plate-shaped member with the light control member of the present invention. be able to.

B. Next, the window with a light control member of the present invention will be described. The window with a light control member of the present invention has a window material and a light control member disposed on one surface of the window material, and the light control member is a member of “A. Light control member”. It is what was demonstrated by the term.

  The window with a light control member of the present invention will be described with reference to the drawings. FIG. 8 is a schematic perspective view showing an example of the window with a light control member of the present invention. The window 10 with a light control member of the present invention has the light control member 1 disposed on one surface of the window member 41 from the light L incident side. In FIG. 8, the light control member 1 has an adhesive layer 32, and the light transmission part 3 and the light deflection part 4 </ b> A are bonded to the window material 41 via the adhesive layer 32. Note that the light transmitting unit 3 and the light deflecting unit 4A in FIG. 8 are the same as those in FIG.

  According to the present invention, since the deodorizer is contained in at least one member constituting the light control member disposed on one surface of the window material, the decomposition product of the photopolymerization initiator is present in the light control member. It is possible to reduce an odor that is uncomfortable depending on the person due to inclusion. Further, in the present invention, it is not necessary to perform an aging process or the like for removing the odor, so that it is possible to efficiently manufacture a window with a light control member.

  Hereinafter, the details of the window with a light control member of the present invention will be described.

1. Light Control Member The light control member in the present invention is the same as the content described in the above “A. Light control member”, and thus the description thereof is omitted here.

2. Window material In this invention, a window material is normally arrange | positioned rather than the light control member at the light source side, such as the sun. That is, it is arranged on the incident surface side of the light control member.
The window material in the present invention is not particularly limited as long as it has a high light transmittance and is generally used. Further, the window material may be colorless or colored as long as it has optical transparency.
Examples of such window materials include acrylic, polycarbonate, and glass.

3. Others The window with a light control member of the present invention may have an adhesive layer for bonding the window material and the light control member. The pressure-sensitive adhesive layer is not particularly limited as long as it has high light transmittance, and for example, the pressure-sensitive adhesive layer described in “A. Light control member” described above can be used.

  It is preferable that the window with a light control member of the present invention has high light transmittance, and specifically shows the light transmittance of the light control member described in “A. Light control member”.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

[Example 1]
The light control member was formed by the following method.

(1) Formation of light transmission part and groove part As preparation of the composition for light transmission part formation, first, bisphenol A ethylene oxide / xylylene diisocyanate / phenoxyethyl acrylate / 2-hydroxyethyl acrylate / bismuth tri (2-ethylhexanoate) is used. The mixture was mixed at 30: 15: 50: 5: 0.02 and reacted at 80 ° C. for 10 hours to obtain a photocurable prepolymer P1. In addition, bisphenol A ethylene oxide / isophorone diisocyanate / phenoxyethyl acrylate / bismuth tri (2-ethylhexanoate) was mixed at 30: 20: 50: 0.02, reacted at 80 ° C. for 10 hours, and photocurable prepolymer P2 Got. Next, 30 parts by mass of photocurable prepolymer P1, 30 parts by mass of photocurable prepolymer P2, 10 parts by mass of phenoxyethyl acrylate (reactive dilution monomer M1), bisphenol A ethylene oxide (reactive dilution monomer M2) 30 parts by mass, tetradecanol ethylene oxide 10 mol adduct phosphate ester (mold release agent S1) 0.03 parts by mass, stearylamine ethylene oxide 15 mol adduct (mold release agent S2) 0. 03 parts by mass, 3 parts by mass of 1-hydroxycyclohexyl phenyl ketone (photopolymerization initiator I1, trade name: Irgacure 184, manufactured by BASF) were mixed and homogenized to obtain a composition for forming a light transmission part.
On one surface of a continuous belt-shaped transparent biaxially stretched polyethylene terephthalate (PET) film (film thickness 50 μm), the above composition for forming a light transmission part was applied so that the film thickness after curing was 100 μm.

  The main cutting surface has a trapezoidal convex portion with a height of 63 μm, a plate surface side width of 28 μm, and a width far from the plate surface of 24 μm. A roll mold was prepared in which convex groups (same shape as the light control unit and reverse irregularities) arranged in parallel with each other with a plurality of strips at a period of 78 μm were prepared.

In a state where the composition for forming a light transmission part is sandwiched between the roll mold and a PET film, after ultraviolet irradiation using a mercury lamp to crosslink and cure the composition for light transmission part formation, The roll mold was peeled off to form a light transmission part having a groove part on the surface of the PET film.
The shape of the groove part was a reversal shape of the convex group of the roll mold described above, that is, a concave group having a trapezoidal longitudinal cross-sectional shape.

(2) Formation of light deflection part Next, the light control part was formed in the groove part. First, 42 parts by mass of urethane acrylate (photocurable prepolymer P3), 18 parts by mass of epoxy acrylate (photocurable prepolymer P4), tripropylene glycol diacrylate (reaction) 35 parts by mass of reactive diluent monomer M3), 5 parts by mass of methoxytriethylene glycol acrylate (reactive diluent monomer M4), 5 parts by mass of aluminum phosphate (deodorant D1), 1-hydroxycyclohexyl phenyl ketone (photopolymerization) 7 parts by mass of initiator I1, trade name: Irgacure 184, manufactured by BASF) were mixed and homogenized to obtain a composition for forming a light deflection part. After applying this to the groove portion of the light transmitting portion, squeegeeing with an iron doctor blade and filling only in the concave groove, ultraviolet irradiation is performed using a mercury lamp to crosslink and cure to form the light deflection portion, and the light The PET film used as the base material when forming the transmission part was peeled from the light transmission part to obtain a light control member. In addition, the refractive index of the light transmission part was 1.55, and the refractive index of the light control part was 1.46 to 1.49. The method of measuring the refractive index is the same as the method described in “2. Light control layer”.

[Example 2]
In the composition for forming a light deflection portion, light control was performed in the same manner as in Example 1 except that a styrene divinylbenzene copolymer (deodorant D2) having a carboxy group was used instead of the deodorant D1. A member was obtained.

[Example 3]
In the composition for forming a light deflection portion, a light control member was obtained in the same manner as in Example 1 except that phosphoric acid titania (deodorant D3) was used instead of the deodorant D1.

[Comparative example]
In the composition for forming a light deflection part, a light control member was obtained in the same manner as in Example 1 except that the deodorant D1 was not used.

[Evaluation]
The following evaluation was performed about the light control member of an Example and a comparative example. In addition, the post-manufacturing process for removing an odor, such as an aging process, is not performed with respect to the light control member manufactured in the said Example and comparative example.
(Odor determination test)
About each light control member produced in Examples 1-3 and the comparative example, determination was implemented in the following determination criteria by sensory evaluation. The results for each light control member are shown in Table 1.
(Standard)
1: Odorless 2: I smell but I don't mind 3: I feel a little odor 4: I feel the smell is too tight 5: The smell is strong and I feel uncomfortable

DESCRIPTION OF SYMBOLS 1 ... Light control member 2 ... Groove part 3 ... Light transmissive part 4A, 4B, 4C ... Light deflection | deviation part 5 ... Incident surface 6 ... Outgoing surface 10 ... Window with light control member 21 ... Metal film 22 ... Metal particle 31 ... Base material 32 ... Adhesive layer 33 ... Overcoat layer 34 ... Hard coat layer 41 ... Window material a ... Groove width b ... Groove depth c ... Distance between grooves d ... Film thickness of light transmitting part f ... Side face of groove part F ... Light reflection surface

Claims (4)

A light control member formed of a light curable resin layer and having a light transmission portion having a plurality of grooves on one surface, and a light deflection portion formed in the groove,
A light control member, wherein a deodorant is contained in at least one member constituting the light control member.   The light control member according to claim 1, wherein the light transmission unit and the light deflection unit have different refractive indexes.   The light control member according to claim 1, wherein one of the side surfaces of the groove extending in the film thickness direction of the light transmission portion is a specular reflection surface. A window with a light control member having a window material, and a light control member disposed on one surface of the window material,
The light control member is formed of a photo-curing resin layer, and has a light transmission part having a plurality of grooves on one surface, and a light deflection part formed in the groove,
A window with a light control member, wherein a deodorant is contained in at least one member constituting the light control member.

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