Resin compositions, laminates, finely textured laminates and articles

Abstract

To provide a resin composition that maintains its initial properties while exhibiting excellent weather resistance. [Solution] A resin composition comprising: component (A) a monomer having a (meth)acrylic group and a polyethylene glycol structure; component (B) N,N-dimethylacrylamide; component (C) a monomer having a (meth)acrylic group and not having a polyethylene glycol structure; component (D) a photoradical initiator; and component (E) a photocurable surface modifier having a fluorine atom or a polydimethylsiloxane structure, wherein when the total content of components (A), (B), and (C) is 100% by mass, the content of component (A) is 30% by mass or more and less than 60% by mass, the content of component (B) is more than 30% by mass and less than 60% by mass, and the content of component (C) is 10% by mass or more and less than 20% by mass.

Description

Technical Field

[0001] The present invention relates to a resin composition, a laminate, a fine concavo-convex laminate, and an article.

Background Art

[0002] Sensor cameras are used in automated vehicles, industrial robots, security and surveillance systems, etc. In such sensor cameras, from the viewpoint of preventing deterioration of the sensor function, a member used for the sensor camera (for example, a cover installed on the front surface of the sensor camera) is subjected to a treatment for imparting antifogging properties.

[0003] As a technique for such a treatment, for example, Patent Document 1 discloses an antifogging and antifouling laminate having a resin base material and an antifogging and antifouling layer on the resin base material, wherein the antifogging and antifouling layer has either fine convex portions or concave portions on the surface, the antifogging and antifouling layer contains a hydrophilic molecular structure, and the pure water contact angle of the surface of the antifogging and antifouling layer is 90° or more.

[0004] Further, Patent Document 2 discloses an antifogging and antifouling laminate having a base material and an antifogging and antifouling layer with a smooth surface on the base material, wherein the antifogging and antifouling layer is a cured product obtained by curing an active energy ray-curable resin composition by active energy rays, the active energy ray-curable resin composition contains a hydrophilic monomer having a radically polymerizable unsaturated group and a photoinitiator, the content of the hydrophilic monomer having a radically polymerizable unsaturated group in the active energy ray-curable resin composition is 60% by mass or more, and the pure water contact angle of the surface of the antifogging and antifouling layer is 90° or more.

Prior Art Documents

Patent Documents

[0005] <00000३०>

Patent Document 1

Patent Document 2

Summary of the Invention

[0006] Patent documents 1 and 2 discuss water repellency and anti-fogging properties. However, when a sensor camera is used outdoors, if the weather resistance of the components used in the sensor camera is low, the components may deteriorate, and the sensor camera may not be able to maintain its sensor function. Patent documents 1 and 2 do not focus on the weather resistance mentioned above. Furthermore, even if weather resistance is imparted to the components, it is desirable that the light transmittance, low haze, and the aforementioned water repellency and anti-fogging properties (hereinafter, the light transmittance, low haze, water repellency, and anti-fogging properties at the time of initial use of the components may be collectively referred to as "initial characteristics") are maintained at the start of use of the components (i.e., before the components are affected by the external environment). In other words, it is desirable that the above-mentioned components have excellent weather resistance while maintaining their initial characteristics.

[0007] Therefore, the object of the present invention is to provide a resin composition that maintains its initial properties while exhibiting excellent weather resistance. Furthermore, the present invention aims to provide a laminate using the resin composition described above. Furthermore, the present invention aims to provide a finely textured laminate using the resin composition described above. Furthermore, the present invention aims to provide an article comprising the above-described laminate or fine-textured laminate. [Means for solving the problem]

[0008] The gist of the present invention, which solves the above problems, is as follows.

[0009] [1] Component (A) is a monomer having a (meth)acrylic group and a polyethylene glycol structure, Component (B) is N,N-dimethylacrylamide, As component (C), a monomer having a (meth)acrylic group and not having a polyethylene glycol structure, Component (D) is a photoradical initiator, Component (E) is a photocurable surface modifier having a fluorine atom or a polydimethylsiloxane structure, It contains, A resin composition characterized in that, when the total content of component (A), component (B), and component (C) is 100% by mass, the content of component (A) is 30% by mass or more and less than 60% by mass, the content of component (B) is more than 30% by mass and less than 60% by mass, and the content of component (C) is 10% by mass or more and less than 20% by mass.

[0010] [2] The resin composition according to [1], wherein the content of component (E) is 0.1 parts by mass or more and 5 parts by mass or less based on 100 parts by mass of the total content of component (A), component (B), and component (C).

[0011] [3] comprising a base material and an anti-fogging layer formed by curing the resin composition described in [1] or [2] on the base material, The laminate is characterized in that the anti-fogging layer has a smooth surface.

[0012] [4] comprising a base material and an anti-fogging layer formed by curing the resin composition described in [1] or [2] on the base material, The anti-fogging layer has a fine uneven structure on its surface, A laminate with fine irregularities, characterized in that the fine irregularities structure consists of an irregularity pattern having a pitch less than or equal to the wavelength of visible light.

[0013] An article characterized by comprising the laminate described in [5] [3].

[0014] An article characterized by comprising a finely textured laminate as described in [6] [4].

[0015] [7] The resin composition according to [1] or [2], wherein the monomer having the (meth)acrylic group and not having a polyethylene glycol structure is at least one selected from the group consisting of ethylene glycol di(meth)acrylate, tetramethylene glycol di(meth)acrylate, hexamethylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, glycerin tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, ditrimethylolpropane tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, and dipentaerythritol hexa(meth)acrylate.

Advantages of the Invention

[0016] According to the present invention, it is possible to provide a resin composition that maintains initial characteristics and has excellent weather resistance. Further, according to the present invention, it is possible to provide a laminate using the above-described resin composition. Further, according to the present invention, it is possible to provide a fine uneven laminate using the above-described resin composition. Further, according to the present invention, it is possible to provide an article including the above-described laminate or fine uneven laminate.

Brief Description of the Drawings

[0017] [Figure 1] It is a schematic cross-sectional view showing a laminate according to an embodiment of the present invention. [Figure 2] It is a schematic cross-sectional view showing a fine uneven laminate according to an embodiment of the present invention.

Modes for Carrying Out the Invention

[0018] Hereinafter, an example of an embodiment of the present invention will be specifically described with reference to the drawings as necessary. For each member disclosed in the drawings, some are schematically represented at scales and shapes different from the actual ones for convenience of explanation.

[0019] <Definition> In this specification, "polyethylene glycol structure" refers to the structure represented by the following formula (1).

[0020] [ka] In equation (1), n ​​represents an integer greater than or equal to 2.

[0021] In this specification, "polydimethylsiloxane structure" refers to a structure composed of repeating units represented by the following formula (2).

[0022] [ka]

[0023] In this specification, "(meth)acrylic group" means at least one of an acrylic group and a methacrylic group. In this specification, "(meth)acrylate" means at least one of an acrylate and a methacrylate. In this specification, "(meth)acrylic acid" means at least one of an acrylic acid and its corresponding methacrylic acid.

[0024] <Resin composition> A resin composition according to one embodiment of the present invention (hereinafter sometimes referred to as "the resin composition of this embodiment") is Component (A) is a monomer having a (meth)acrylic group and a polyethylene glycol structure, Component (B) is N,N-dimethylacrylamide, As component (C), a monomer having a (meth)acrylic group and not having a polyethylene glycol structure, Component (D) is a photoradical initiator, Component (E) is a photocurable surface modifier having a fluorine atom or a polydimethylsiloxane structure, It contains, The present invention is characterized in that, when the total content of component (A), component (B), and component (C) is 100% by mass, the content of component (A) is 30% by mass or more and less than 60% by mass, the content of component (B) is more than 30% by mass and less than 60% by mass, and the content of component (C) is 10% by mass or more and less than 20% by mass.

[0025] The resin composition of this embodiment contains components (A) to (E) as described above, and by having the content of components (A), (B), and (C) within a predetermined range, it is possible to improve weather resistance while maintaining light transmittance, low haze, water repellency, and anti-fogging properties. Therefore, the resin composition of this embodiment exhibits excellent weather resistance while maintaining its initial properties.

[0026] -Ingredient (A)- The resin composition of this embodiment contains, as component (A), a monomer having a (meth)acrylic group and a polyethylene glycol structure.

[0027] The monomer having a (meth)acrylic group and a polyethylene glycol structure is not particularly limited, and examples include monomers obtained by reacting an alcohol having a polyethylene glycol structure with (meth)acrylic acid or a derivative thereof.

[0028] The aforementioned alcohol having a polyethylene glycol structure is a compound obtained by modifying a polyhydric alcohol with polyethylene glycol. The polyhydric alcohol is not particularly limited and includes dihydric alcohols such as ethylene glycol, propylene glycol, tetramethylene glycol, neopentyl glycol, and dimethylolpropionic acid; trihydric alcohols such as trimethylolethane, trimethylolpropane, pentaglycerol, glycerol, 1,2,4-butanetriol, and 1,2,6-hexanetriol; and tetrahydric or higher alcohols such as pentaerythritol, diglycerol, and dipentaerythritol. Here, valency refers to the number of hydroxyl groups in the molecule, and polyvalent means having two or more valencies.

[0029] Furthermore, monomers having a (meth)acrylic group and a polyethylene glycol structure, and further having a fluorine atom or a polydimethylsiloxane structure, i.e., monomers corresponding to component (E), are not considered to fall under component (A) by definition.

[0030] The monomer having a (meth)acrylic group and a polyethylene glycol structure is preferably a compound represented by the following formula (3) or a compound represented by the following formula (4).

[0031] [ka] In equation (3), n1, n2, and n3 are integers greater than or equal to 0, and at least one of n1, n2, and n3 is an integer greater than or equal to 2. The sum of n1, n2, and n3 is preferably an integer between 5 and 30, and more preferably an integer between 7 and 25.

[0032] [ka] In equation (4), n4 represents an integer greater than or equal to 2. Preferably, n4 is an integer less than or equal to 30, and more preferably an integer less than or equal to 20.

[0033] These monomers having a (meth)acrylic group and a polyethylene glycol structure may be used individually or in combination of two or more.

[0034] -Component (B)- The resin composition of this embodiment contains N,N-dimethylacrylamide as component (B). By containing N,N-dimethylacrylamide as component (B), the resin composition of this embodiment can ensure anti-fogging properties.

[0035] -Component (C)- The resin composition of this embodiment contains, as component (C), a monomer having a (meth)acrylic group and not having a polyethylene glycol structure. Monomers having a (meth)acrylic group and not having a polyethylene glycol structure, and further having a fluorine atom or a polydimethylsiloxane structure, i.e., monomers corresponding to component (E), are not considered to be component (C) by definition.

[0036] The monomer having a (meth)acrylic group and not having a polyethylene glycol structure is not particularly limited, and examples include monomers obtained by reacting an alcohol without a polyethylene glycol structure with (meth)acrylic acid or a derivative thereof. Here, "alcohols that do not have a polyethylene glycol structure" can be exemplified by the "polyhydric alcohols" mentioned above.

[0037] From the viewpoint of more reliably obtaining the desired effects described above, it is preferable that monomers having (meth)acrylic groups and not having a polyethylene glycol structure have two or more (meth)acrylic groups in one molecule, and it is also preferable that monomers having (meth)acrylic groups and not having a polyethylene glycol structure are not highly hydrophilic (are hydrophobic). Specifically, the monomer having a (meth)acrylic group and not having a polyethylene glycol structure is preferably one or more selected from the group consisting of ethylene glycol di(meth)acrylate, tetramethylene glycol di(meth)acrylate, hexamethylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, glycerin tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, ditrimethylolpropane tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, and dipentaerythritol hexa(meth)acrylate. It is more preferable that one or more are selected from the group consisting of rolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, ditrimethylolpropane tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, and dipentaerythritol hexa(meth)acrylate; it is even more preferable that one or more are selected from the group consisting of trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, and pentaerythritol tetra(meth)acrylate; and it is particularly preferable that one or more are selected from the group consisting of trimethylolpropane triacrylate, pentaerythritol triacrylate, and pentaerythritol tetraacrylate.

[0038] It is preferable that the monomer having a (meth)acrylic group and not having a polyethylene glycol structure does not contain sulfonic acid (meth)acrylate, salts of sulfonic acid (meth)acrylate (e.g., metal salts of sulfonic acid (meth)acrylate), (meth)acrylate having an amino group, or salts of (meth)acrylate having an amino group (e.g., metal salts of (meth)acrylate having an amino group).

[0039] These monomers, which have a (meth)acrylic group and do not have a polyethylene glycol structure, may be used individually or in combination of two or more.

[0040] -Content of component (A), component (B), and component (C)- The resin composition of this embodiment is required to have the following characteristics when the total content of component (A), component (B), and component (C) is 100% by mass, such that the content of component (A) is 30% by mass or more and less than 60% by mass, the content of component (B) is more than 30% by mass and less than 60% by mass, and the content of component (C) is 10% by mass or more and less than 20% by mass.

[0041] If the content of component (A) is less than 30% by mass, the content of component (B) and / or component (C) will be relatively high, which will worsen the haze or reduce the anti-fogging properties. On the other hand, if the content of component (A) is 60% by mass or more, weather resistance cannot be guaranteed. From the viewpoint of further improving weather resistance, the content of component (A) is preferably 55% by mass or less, and more preferably 50% by mass or less. Note that worsening haze means that the haze value increases.

[0042] If the content of component (B) is 30% by mass or less, the content of component (A) and / or component (C) becomes relatively high, and the weather resistance or anti-fogging properties decrease. From the viewpoint of further improving weather resistance and anti-fogging properties, it is preferable that the content of component (B) be 34% by mass or more. On the other hand, if the content of component (B) is 60% by mass or more, the haze worsens. From the viewpoint of further suppressing the worsening of haze, it is preferable that the content of component (B) be 50% by mass or less.

[0043] If the content of component (C) is less than 10% by mass, the content of component (A) and / or component (B) will be relatively high, making it impossible to guarantee weather resistance or worsening haze. From the viewpoint of further improving weather resistance and further suppressing the worsening of haze, it is preferable that the content of component (C) be 13% by mass or more. On the other hand, if the content of component (C) is 20% by mass or more, the anti-fogging properties decrease. From the viewpoint of further suppressing the decrease in anti-fogging properties, it is preferable that the content be 17% by mass or less.

[0044] In this embodiment, when the total content of components (A), (B), and (C) is 100% by mass, it is preferable that the content of component (A) is 30% by mass or more and 50% by mass or less, the content of component (B) is 34% by mass or more and 50% by mass or less, and the content of component (C) is 13% by mass or more and 17% by mass or less. In this case, weather resistance can be further improved while improving initial properties.

[0045] The total content of component (A), component (B), and component (C) is preferably 89% by mass or more and 98% by mass or less of the total amount of the resin composition of this embodiment. In this case, weather resistance can be further improved while improving initial properties. From a similar viewpoint, the total content of component (A), component (B), and component (C) is more preferably 90% by mass or more, and more preferably 95% by mass or less.

[0046] -Ingredient (D)- The resin composition of this embodiment contains a photoradical initiator as component (D). The photoradical initiator is not particularly limited and examples include acetophenone-based photoradical initiators, benzyl ketal-based photoradical initiators, phosphorus-based photoradical initiators, and the like.

[0047] The acetophenone-based photoradical initiator is not particularly limited and includes, for example, 1-hydroxycyclohexylphenyl ketone (Omnirad 184, manufactured by IGM Resins BV), 2-hydroxy-2-methyl-1-phenylpropan-1-one (DAROCUR 1173, manufactured by BASF Japan), 2,2-dimethoxy-2-phenylacetophenone (IRGACURE 651, manufactured by BASF Japan), 1-[4-(2-hydroxyethoxy)-phenyl]-2-hydroxy-2-methyl-1-propan-1-one (IRGACURE 2959, manufactured by BASF Japan), and 2-hydroxy-1-{4-[2-hydroxy-2-methylpropionyl]-benzyl}phenyl}-2-methyl-propan-1-one (IRGACURE 127, manufactured by BASF Japan).

[0048] The benzyl ketal-based photoradical initiator is not particularly limited and includes, for example, benzophenone, fluorenone, dibenzosverone, 4-aminobenzophenone, 4,4'-diaminobenzophenone, 4-hydroxybenzophenone, 4-chlorobenzophenone, 4,4'-dichlorobenzophenone, and the like.

[0049] The phosphorus-based photoradical initiator is not particularly limited and examples include bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide (IRGACURE 819, manufactured by BASF Japan), (2,4,6-trimethylbenzoyl-diphenylphosphine oxide (DAROCURE TPO, manufactured by BASF Japan)), etc.

[0050] These photoradical initiators may be used individually or in combination of two or more.

[0051] From the viewpoint of improving the curability of the resin composition, it is preferable that the photoradical initiator includes an acetophenone-based photoradical initiator.

[0052] The content of component (D) (photoradical initiator) is preferably 0.1 parts by mass or more and 10 parts by mass or less, based on 100 parts by mass of the total content of components (A), (B), and (C). A content of 0.1 parts by mass or more of component (D) improves the curability of the resin composition. From a similar viewpoint, a content of 1.0 part by mass or more of component (D) is more preferable. Furthermore, a content of 10 parts by mass or less of component (D) more adequately ensures optical properties such as low haze. From a similar viewpoint, a content of 5 parts by mass or less of component (D) is more preferable.

[0053] -Component (E)- The resin composition of this embodiment contains a photocurable surface modifier having a fluorine atom or a polydimethylsiloxane structure as component (E). By containing a photocurable surface modifier as component (E), the resin composition of this embodiment can ensure water repellency.

[0054] Here, "photocurable" refers to the property of polymerizing by reacting with radicals generated by light. Photocurable surface modifiers typically have polymerizable functional groups. Examples of polymerizable functional groups are not particularly limited, but include (meth)acrylic groups, for example.

[0055] The photocurable surface modifier is not particularly limited and includes, for example, (meth)acrylates having a fluorine atom, such as (meth)acrylates having a fluoroalkyl group or (meth)acrylates having a fluoroalkyl ether group; and (meth)acrylates having a polydimethylsiloxane structure. The photocurable surface modifier is preferably compatible with component (A).

[0056] The photocurable surface modifier may be a synthetic product or a commercially available product. Examples of synthetic photocurable surface modifiers include the compounds described in Examples 1 and 2 of the Specification of Japanese Patent No. 6340201. Examples of commercially available photocurable surface modifiers containing a fluorine atom include the KY-1200 series (manufactured by Shin-Etsu Chemical Co., Ltd.), the Megafac RS series (manufactured by DIC Corporation), and Optool DAC (manufactured by Daikin Industries, Ltd.). Examples of commercially available photocurable surface modifiers having a polydimethylsiloxane structure include the X-22-164 series (manufactured by Shin-Etsu Chemical Co., Ltd.), the TEGO Red series (manufactured by Evonik), and BYK-UV3570 (manufactured by BYK-Chemie GmbH).

[0057] The content of component (E) (photocurable surface modifier) ​​is not particularly limited, but it is preferably 0.1 parts by mass or more and 5 parts by mass or less per 100 parts by mass of the total content of components (A), (B), and (C). A content of 0.1 parts by mass or more of component (E) can further enhance water repellency. A content of 5 parts by mass or less of component (E) can more adequately ensure optical properties such as low haze.

[0058] - Additives - In addition to the components described above (i.e., components (A), (B), (C), (D), and (E)), the resin composition of this embodiment may also contain additives such as ultraviolet absorbers, radical scavengers, solvents, leveling agents, hue adjusters, antioxidants, antistatic agents, and thermoplastic resins, selected as appropriate without departing from the objectives of the present invention.

[0059] The ultraviolet absorbers are not particularly limited and include, for example, benzophenone compounds, benzotriazole compounds, benzoate compounds, benzoxazinon compounds, cyanoacrylate compounds, benzoxazole compounds, merocyanine compounds, salicylate compounds, formamidine compounds, oxanilide compounds, and the like. From the viewpoint of compatibility with the above-mentioned components, the ultraviolet absorber is preferably a benzotriazole compound.

[0060] The ultraviolet absorber preferably has an absorption peak in the UVA wavelength band (wavelength: 315-400 nm).

[0061] Commercially available UV absorbers can be used. Examples of such commercially available UV absorbers include the Tinuvin series, Chimassorb series, and Uvinul series from BASF, the ADEKA LA series from ADEKA Corporation, the Chemisorb series from Chemipro Chemicals Co., Ltd., the SEESORB series from Cipro Chemicals Co., Ltd., and benzotriazole compounds from Johoku Chemical Industry Co., Ltd.

[0062] The radical scavenger is not particularly limited, but is preferably a basic compound, and more preferably a secondary or tertiary amine compound. In this case, discoloration, cracking, and fissures can be suppressed in the anti-fogging layer formed by the curing of the resin composition of this embodiment, and compatibility with the above-mentioned components is good. The basic compound preferably has a base dissociation constant (pkb value) of 9.0 or less, more preferably 7.0 or less, and even more preferably 6.0 or less. Furthermore, it is preferable that the base dissociation constant (pkb value) is 3.0 or higher, and more preferably 4.0 or higher.

[0063] The radical scavenger preferably has a structure represented by the following formula (5), a so-called hindered amine structure.

[0064] [ka] In formula (3), * indicates a bond with another site, and R indicates a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. The alkyl group having 1 to 6 carbon atoms may be linear or branched.

[0065] The radical scavenger having a hindered amine structure is preferably bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, til 1,2,2,6,6-pentamethyl-4-piperidyl sebacate, or bis(1,2,2,6,6-pentamethyl-4-piperidyl)[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonate.

[0066] The radical scavenger can be a commercially available product. Examples of commercially available radical scavengers include Tinuvin 292 or Tinuvin 144 manufactured by BASF.

[0067] These additives may be used individually or in combination of two or more. Commercially available additives can be suitably used.

[0068] The content of the additives mentioned above is not particularly limited, but it is preferable that it be 3 parts by mass or less per 100 parts by mass of the total content of components (A), (B), and (C). In this case, the effect of the resin composition of this embodiment can be more reliably guaranteed. From a similar viewpoint, it is more preferable that the content of the additives be 2.5 parts by mass or less, and even more preferable that it be 2.3 parts by mass or less.

[0069] <Method for producing resin compositions> The resin composition of this embodiment can be manufactured by conventional methods. For example, it can be manufactured by conventionally blending and mixing the above-mentioned components and, if necessary, the additives.

[0070] <Uses of resin compositions> The use of the resin composition of this embodiment is not particularly limited. The resin composition of this embodiment is suitable as a resin composition used for forming an anti-fogging layer (i.e., an anti-fogging coating agent).

[0071] <Laminate> A laminate according to one embodiment of the present invention (hereinafter sometimes referred to as "the laminate of this embodiment") comprises a base material and an anti-fogging layer formed by curing the resin composition of this embodiment on the base material, The anti-fogging layer is characterized by having a smooth surface. Here, "smooth surface" means that the surface does not have any intentionally formed fine protrusions or recesses (i.e., a fine uneven structure). Specifically, in the laminate of this embodiment, when the anti-fogging layer is formed, no fine protrusions or recesses are formed on the surface by physical processing.

[0072] The laminate of this embodiment includes an anti-fogging layer formed by curing the resin composition of this embodiment described above, and therefore maintains its initial properties while exhibiting excellent weather resistance. Furthermore, because the surface of the anti-fogging layer of the laminate in this embodiment is smooth, water-based and / or oil-based stains are less likely to adhere to it. Even if water-based and / or oil-based stains do adhere, they can be easily removed with a cloth or the like.

[0073] The laminate of this embodiment will be described below with reference to Figure 1.

[0074] -Base material- As shown in Figure 1, the laminate 1 of this embodiment comprises a base material 2. The base material 2 is not particularly limited and examples include a resin base material and an inorganic base material. Furthermore, the base material 2 may be a combination of the resin base material and the inorganic base material.

[0075] The material of the resin substrate is not particularly limited and includes, for example, triacetylcellulose (TAC), polyester (TPEE), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), polyamide (PA), aramid, polyethylene (PE), polyacrylate, polyethersulfone, polysulfone, polypropylene (PP), polystyrene, diacetylcellulose, polyvinyl chloride, acrylic resin (PMMA), polycarbonate (PC), epoxy resin, urea resin, urethane resin, melamine resin, phenolic resin, acrylonitrile-butadiene-styrene copolymer, cycloolefin polymer (COP), cycloolefin copolymer (COC), PC / PMMA laminate, rubber-added PMMA, and the like.

[0076] Examples of materials for the inorganic substrate include metal oxides (e.g., quartz, sapphire, glass, etc.), metals (e.g., iron, chromium, nickel, molybdenum, niobium, copper, titanium, aluminum, zinc, silicon, magnesium, manganese, etc.), and alloys.

[0077] The substrate 2 may or may not be transparent. Here, "transparent" means that it has a high transmittance of light with wavelengths belonging to the visible light band (approximately 380 nm to 780 nm), for example, that the transmittance of such light is 70% or more. It is preferable that the substrate 2 is transparent.

[0078] The shape of the base material 2 is not particularly limited, but it is preferably in the form of a plate, sheet, or film.

[0079] If the base material 2 is a combination of the resin base material and the inorganic base material, the base material may have an adhesive layer (not shown), such as an adhesive sheet, on the contact surface between the resin base material and the inorganic base material.

[0080] The average thickness of the resin substrate is not particularly limited, but is preferably 5 μm or more and 1,000 μm or less, more preferably 10 μm or more and 500 μm or less, and even more preferably 20 μm or more and 400 μm or less.

[0081] There are no particular restrictions on the average thickness of the inorganic substrate, but for example, it is preferably 0.1 mm or more and 100 mm or less, more preferably 0.5 mm or more and 50 mm or less, and preferably 1 mm or more and 30 mm or less.

[0082] The base material 2 may have characters, patterns, images, etc., printed on its surface.

[0083] -Anti-fog layer- As shown in Figure 1, the laminate 1 of this embodiment comprises an anti-fog layer 3 on a substrate 2. The anti-fog layer 3 is formed by curing the resin composition of this embodiment described above. In other words, the anti-fog layer 3 is a layer made of a cured product of the resin composition of this embodiment.

[0084] From the viewpoint of further enhancing water repellency, it is preferable that the water contact angle of the "anti-fogging layer 3" in the laminate 1 of this embodiment is 85° or higher. The more preferable lower limit of the water contact angle may vary depending on the type of component (E) (photocurable surface modifier) ​​described above. For example, when a photocurable surface modifier having a fluorine atom is used as component (E), it is more preferable that the water contact angle of the surface be 95° or higher, even more preferable that be 100° or higher, and particularly preferable that be 105° or higher. In this case, water repellency can be further enhanced. Also, when a photocurable surface modifier having a polydimethylsiloxane structure is used as component (E), it is more preferable that the water contact angle be 90° or higher, even more preferable that be 95° or higher, and particularly preferable that be 100° or higher. In this case, water repellency can be further enhanced. There is no particular upper limit to the water contact angle, and it can be selected as appropriate, but the water contact angle may be, for example, 120° or less. The "water contact angle" can be measured using the method described in the examples. The "water contact angle" can be adjusted, for example, by appropriately selecting the type of component (particularly component (E)) and the content of the component in the resin composition of this embodiment.

[0085] The average thickness of the anti-fogging layer 3 is not particularly limited, but is preferably between 1 μm and 100 μm. In this case, interference unevenness can be reduced. From a similar viewpoint, the average thickness is more preferably between 4 μm and 70 μm, and even more preferably between 10 μm and 60 μm.

[0086] -Other layers- The laminate 1 of this embodiment may further comprise other layers (not shown). Other layers are not particularly limited and may include, for example, an anchor layer, an adhesive layer, a protective layer, etc.

[0087] The anchor layer is typically a layer placed between the base material 2 and the anti-fog layer 3. By placing the anchor layer between the base material 2 and the anti-fog layer 3, the adhesion between the base material 2 and the anti-fog layer 3 can be improved.

[0088] The adhesive layer is typically a layer located on the side of the substrate 2 opposite to the side having the anti-fogging layer 3. For example, an OCA film (optical transparent adhesive film) can be used for the adhesive layer.

[0089] The protective layer is a layer that protects the surface of the anti-fog layer 3. The protective layer is typically placed on the surface of the anti-fog layer 3.

[0090] <Method for manufacturing laminates> The method for manufacturing the laminate of this embodiment is not particularly limited, but for example, it may include a manufacturing method comprising: a coating step of applying the resin composition of this embodiment to at least one surface of the substrate to form an uncured resin layer; and a photocuring step of curing the uncured resin layer by irradiating it with light to form an anti-fogging layer. The laminate of this embodiment can be manufactured by such a manufacturing method. In this manufacturing method, no physical processing is performed for the purpose of forming a fine uneven structure on the surface of the anti-fogging layer.

[0091] -Coating process- In the coating step, the resin composition of this embodiment is applied to at least one surface of the substrate to form an uncured resin layer. The method for applying the resin composition of this embodiment is not particularly limited and includes, for example, wire bar coating, blade coating, spin coating, reverse roll coating, die coating, spray coating, roll coating, gravure coating, microgravure coating, lip coating, air knife coating, curtain coating, comma coating method, dipping method, etc.

[0092] In the coating process, the resin composition of this embodiment may be applied to the substrate and then dried as needed.

[0093] -Light curing process- In the photocuring process, the uncured resin layer is irradiated with light to cure it. This allows for the formation of an anti-fogging layer made from the resin composition of this embodiment.

[0094] The light used in the photocuring step is not particularly limited as long as it can cure the uncured resin layer, and examples include ultraviolet light, infrared light, laser light, visible light, microwaves, etc., but ultraviolet light is preferred among these. The wavelength of the light can be appropriately selected depending on the components of the resin composition in this embodiment.

[0095] In the aforementioned photocuring process, there are no particular restrictions on the amount of light irradiation (cumulative light dose), and it can be appropriately selected according to the purpose, but 0.1 J / cm² is recommended. 2 More than 10J / cm 2 Preferably, the following: More preferably, 0.15 J / cm² 2 More than 5J / cm 2 The following, and more preferably 0.2 J / cm² 2 More than 3J / cm 2 The following applies:

[0096] <Micro-textured laminate> A micro-textured laminate according to one embodiment of the present invention (hereinafter sometimes referred to as "the micro-textured laminate of this embodiment") comprises a base material and an anti-fogging layer formed by curing the resin composition of this embodiment described above on the base material, wherein the anti-fogging layer has a micro-textured structure on its surface, and the micro-textured structure consists of a textured pattern having a pitch less than or equal to the wavelength of visible light.

[0097] The finely textured laminate of this embodiment includes an anti-fogging layer formed by curing the resin composition of this embodiment described above, and therefore maintains its initial properties while exhibiting excellent weather resistance. The micro-textured laminate of this embodiment can further improve the water contact angle by having predetermined fine protrusions and recesses on the surface of the anti-fog layer. Furthermore, the micro-textured laminate of this embodiment has excellent anti-reflective performance because the surface of the anti-fog layer has a fine textured structure. Therefore, the micro-textured laminate of this embodiment can further improve the initial total light transmittance (i.e., the light transmittance at the start of use of the material).

[0098] The finely textured laminate of this embodiment will be described below with reference to Figure 2.

[0099] -Base material- As shown in Figure 2, the micro-textured laminate 11 of this embodiment includes a base material 12. The description of the "base material 12" in the micro-textured laminate 11 of this embodiment will be based on the description of the "base material 2" in the laminate 1 of this embodiment.

[0100] -Anti-fog layer- As shown in Figure 2, the fine-textured laminate 11 of this embodiment includes an anti-fog layer 13 on a substrate 12. The anti-fog layer 13 is formed by curing the resin composition of this embodiment described above. In other words, the anti-fog layer 13 is a layer made of a cured product of the resin composition of this embodiment.

[0101] As described above, the "anti-fogging layer 13" in the micro-textured laminate 11 of this embodiment has a micro-textured structure 14 on its surface. That is, the anti-fogging layer 13 has a fine textured pattern on its surface (convex portions that are convex in the thickness direction of the micro-textured laminate and concave portions that are concave in the thickness direction of the micro-textured laminate). The convex portions and concave portions may be arranged periodically (for example, in a staggered or rectangular grid pattern) or randomly. Furthermore, there are no particular restrictions on the shape of the convex portions and concave portions, and they may be bullet-shaped, cone-shaped, columnar, needle-shaped, etc. Note that the shape of the recess refers to the shape formed by the inner wall of the recess.

[0102] The average period (pitch) of the aforementioned uneven pattern is less than or equal to the wavelength of visible light (for example, 830 nm or less), more preferably 350 nm or less, even more preferably 280 nm or less, and even more preferably 100 nm or more, and even more preferably 150 nm or more. By making the pitch of the uneven pattern on the surface of the anti-fog layer 13 less than or equal to the wavelength of visible light, in other words, by making the surface of the anti-fog layer 13 a so-called moth-eye structure, the anti-reflective performance can be improved.

[0103] Here, the average period of the uneven surface pattern is the arithmetic mean of the distances between adjacent protrusions and recesses. The uneven surface pattern can be observed, for example, by a scanning electron microscope (SEM) or a cross-sectional transmission electron microscope (Cross-sectional TEM). One method for calculating the average period is to select multiple combinations of adjacent protrusions and adjacent recesses, measure the distances between the protrusions and recesses in each combination, and then average the measured values.

[0104] The depth of the recesses (height of the protrusions) in the aforementioned uneven pattern is not particularly limited, but is preferably 150 nm or more, more preferably 190 nm or more, and also preferably 300 nm or less, more preferably 230 nm or less. On the other hand, the thickness of the portion of the anti-fogging layer 13 in which the uneven pattern is not formed, i.e., the base portion 15, is not particularly limited, but is preferably 1 μm or more, more preferably 4 μm or more, even more preferably 10 μm or more, and also preferably 100 μm or less, more preferably 70 μm or less, and even more preferably 60 μm or less.

[0105] From the viewpoint of further enhancing water repellency, it is preferable that the water contact angle of the surface of the "anti-fogging layer 13" in the fine-textured laminate 11 of this embodiment is 110° or higher. The more preferable lower limit of the water contact angle may vary depending on the type of component (E) (photocurable surface modifier) ​​described above. For example, when a photocurable surface modifier having a fluorine atom is used as component (E) (photocurable surface modifier), it is more preferable that the water contact angle of the surface be 120° or higher, even more preferable that be 125° or higher, and particularly preferable that be 130° or higher. In this case, water repellency can be further enhanced. Also, when a photocurable surface modifier having a polydimethylsiloxane structure is used as component (E) (photocurable surface modifier), it is more preferable that the water contact angle of the surface be 115° or higher, even more preferable that be 120° or higher, and particularly preferable that be 125° or higher. In this case, water repellency can be further enhanced. There is no particular upper limit to the water contact angle, and it can be selected as appropriate, but the water contact angle may be, for example, 160° or less. The "water contact angle" can be measured using the method described in the examples. The "water contact angle" can be adjusted, for example, by appropriately selecting the type of component (particularly component (E)) and the content of the component in the resin composition of this embodiment.

[0106] -Other layers- The micro-textured laminate 11 of this embodiment may further comprise other layers (not shown). The description of the "other layers" in the micro-textured laminate 11 of this embodiment is based on the description of the "other layers" in the laminate 1 of this embodiment.

[0107] <Method for manufacturing a micro-textured laminate> The method for manufacturing the fine-textured laminate is not particularly limited, but for example, it may include a clamping step of forming an uncured resin layer by sandwiching the resin composition of this embodiment between a substrate and a soft mold having a fine-textured structure on one side; a photocuring step of forming an anti-fogging layer by irradiating the uncured resin layer with light to cure the uncured resin layer; and a peeling step of peeling the soft mold from the anti-fogging layer. The fine-textured laminate of this embodiment can be manufactured by such a manufacturing method.

[0108] -Pinching process- In the clamping process, the resin composition of this embodiment is clamped so that the surface of the soft mold having a fine uneven structure faces one side of the substrate. This forms a fine uneven structure on the surface of the uncured resin layer. The method for sandwiching the resin composition of this embodiment is not particularly limited, but examples include a method in which a gap of a certain distance (for example, about 25 μm) is provided between the substrate and the soft mold, and the resin composition of this embodiment is filled into the gap.

[0109] Here, a soft mold having a fine uneven structure on one surface can be manufactured, for example, by forming a fine uneven layer having a predetermined uneven pattern on a base substrate.

[0110] The materials constituting the base substrate are not particularly limited, but transparent and break-resistant materials are preferred, such as PET (polyethylene terephthalate) and TAC (triacetylcellulose). Furthermore, the formation of a fine uneven layer on a base substrate can be achieved, for example, by implementing a method that includes the steps of: applying an uncured UV-curable resin to one surface of the base substrate; bringing a roll with a corresponding uneven pattern onto the applied UV-curable resin in close contact with it to transfer the uneven pattern to the UV-curable resin; irradiating the applied UV-curable resin with UV light to cure it; and peeling the cured UV-curable resin from the roll. The UV-curable resin is not particularly limited, but examples include UV-curable acrylic resins and UV-curable epoxy resins. In addition, various additives such as curing initiators may be added to the UV-curable resin as needed.

[0111] The soft mold described above may have a film made of an inorganic material coated on the surface of its finely textured structure in order to improve its release properties.

[0112] -Light curing process- In the photocuring process, the uncured resin layer is irradiated with light to cure it. This allows for the formation of an anti-fogging layer which is made of the resin composition of this embodiment and has a fine uneven surface structure. The explanation of the "photocuring process" in the manufacturing method of a micro-textured laminate will be based on the explanation of the "photocuring process" in the manufacturing method of a laminate described above. The light curing process may be performed at the same time as the clamping process. The resulting micro-textured surface of the anti-fogging layer can interlock seamlessly with the micro-textured surface of the soft mold.

[0113] -Peeling process- In the peeling step, the soft mold is peeled off from the anti-fogging layer formed in the photocuring step. The method for peeling off the soft mold is not particularly limited and known methods can be used.

[0114] <Goods> An article according to one embodiment of the present invention (hereinafter sometimes referred to as "the article of this embodiment") is characterized by comprising a laminate of this embodiment or a fine-textured laminate of this embodiment. Because the article of this embodiment comprises a laminate of this embodiment or a fine-textured laminate of this embodiment, it has excellent weather resistance while maintaining its initial properties. The article of this embodiment may be the laminate of this embodiment itself, or the fine-textured laminate of this embodiment itself, or it may comprise the laminate of this embodiment, or the fine-textured laminate of this embodiment, and other components.

[0115] The articles of this embodiment are not particularly limited and include, for example, sensor cameras used in autonomous vehicles, industrial robots, security and surveillance systems, etc.; autonomous vehicles, industrial robots, security and surveillance systems equipped with the sensor camera; camera modules used in notebook computers, tablet computers, smartphones, mobile phones, etc.; notebook computers, tablet computers, smartphones, mobile phones equipped with the camera module; window materials such as glass windows and refrigerated / frozen display cases; mirrors such as bathroom mirrors and automobile side mirrors; solar panels; bathroom floors and walls; eyeglasses: goggles; lenses: helmets; microlens arrays; and automobile parts such as headlight covers, front panels, side panels, and rear panels. If the article of this embodiment is the sensor camera or camera module described above, the article typically includes the laminate of this embodiment or the fine-textured laminate of this embodiment as a cover to be installed in front of the camera.

[0116] When the article of this embodiment comprises the laminate of this embodiment, the article is preferably a window material or front panel for a refrigerated or frozen display case.

[0117] When the article of this embodiment comprises the fine-textured laminate of this embodiment, the article is preferably a sensor camera. Since the fine-textured laminate of this embodiment has particularly excellent light transmittance of the anti-fogging layer, a sensor camera equipped with the fine-textured laminate of this embodiment has particularly excellent sensor function. Furthermore, since the fine-textured laminate of this embodiment has particularly excellent anti-fogging and water-repellent properties, the occurrence of condensation due to environmental changes can be further suppressed. As a result, the deterioration of sensor function due to environmental changes is further suppressed in a sensor camera equipped with the fine-textured laminate of this embodiment. [Examples]

[0118] The present invention will be described in more detail below with reference to examples, but the present invention is not limited in any way to the following examples.

[0119] <Preparation of resin composition> Resin compositions of Examples 1 to 15 and Comparative Examples 1 to 12 were obtained by compounding and mixing according to the formulations shown in Table 1 using conventional methods. The values ​​in Table 1 are shown so that the total of component (A), component (B), component (C), ACMO, and DEAA is 100 parts by mass.

[0120] [Table 1]

[0121] *1 Ingredients (C-1): "A-TMM-3L" manufactured by Shin-Nakamura Chemical Industry Co., Ltd., pentaerythritol tri and tetraacrylate *2 Ingredient (C-2): "A-TMPT" manufactured by Shin-Nakamura Chemical Industry Co., Ltd., trimethylolpropane triacrylate *3 Ingredients (C-3): "M-313" manufactured by Toagosei Co., Ltd., tris(2-hydroxyethyl)isocyanurate di and triacrylic acid esters *4 Component (B): N,N-dimethylacrylamide *5 ACMO: Acryloylmorpholine *6 DEAA: N,N-diethylacrylamide *7 Component (A-1): "AT-20E" manufactured by Shin-Nakamura Chemical Industry Co., Ltd., the compound represented by formula (3) above. *8 Component (A-2): "A-600", manufactured by Shin-Nakamura Chemical Industry Co., Ltd., a compound represented by formula (4) above. *9 Component (D-1): Omnirad 184, manufactured by IGM Resins BV, photoradical initiator *10 Ingredient (E-1): "KY-1203" manufactured by Shin-Etsu Chemical Co., Ltd., a photocurable surface modifier containing fluorine atoms. *11 Ingredient (E-2): BYK-UV3570, manufactured by BYK-Chemie GmbH, a photocurable surface modifier having a polydimethylsiloxane structure.

[0122] <Fabrication of a micro-textured laminate> The following materials were used to fabricate the finely textured laminate. Blue plate glass: Manufactured by Matsunami Glass Industry Co., Ltd., product name "Large Slide Glass S9213", rectangular shape of 52mm x 76mm, thickness 1.3mm Adhesive sheet: Manufactured by Panac Co., Ltd., product name "PD-S1", thickness 25μm SIM tape: Manufactured by Hayashi Co., Ltd., product name "shim plate roll", thickness 20μm TAC Film: Manufactured by Panac Co., Ltd., product name "ZRD40SL", thickness 40μm

[0123] The fabrication of the finely textured laminate is described below. A blue glass plate was prepared, and an adhesive sheet was placed on one 52 mm x 76 mm surface of the blue glass plate. Next, a soft mold having a fine uneven structure on one surface was prepared, and the soft mold was attached to the adhesive sheet so that the side without the fine uneven structure was facing the adhesive sheet, thereby obtaining a base material F. A blue glass plate was prepared, and an adhesive sheet was placed on one 52 mm x 76 mm surface of the blue glass plate. Next, a TAC film was attached to the adhesive sheet to obtain a base material G. SIM tape was placed on two short sides of substrate F (i.e., sides with a length of 52 mm), and 0.02 g of each prepared resin composition was dropped onto the center of the surface of substrate F where the soft mold was placed, taking care not to create bubbles. Then, substrate F and substrate G were superimposed so that the TAC film was in contact with the resin composition, and fixed with clips to obtain the laminate 3 before light irradiation. The resulting laminated material 3 before light irradiation was subjected to a belt conveyor type UV irradiation device (ECS-401XN2-3, manufactured by iGraphics Co., Ltd., light source: metal halide lamp), with an integrated light intensity of 2 J / cm². 2 Light was irradiated to form an anti-fogging layer. Then, the substrate F was peeled off from the laminate 3 after light irradiation (i.e., the soft mold was peeled off from the anti-fogging layer). In this way, the fine-textured laminates of Examples 1 to 15 and the fine-textured laminates of Comparative Examples 1 to 12 were produced. In each of the produced fine-textured laminates, a fine textured pattern was formed on the surface of the anti-fogging layer, and the average period (pitch) of the textured pattern was less than or equal to the wavelength of visible light. Furthermore, the blue glass itself was designated as Comparative Example 13, and the substrate G was designated as Comparative Example 14.

[0124] <Initial characteristics evaluation> -Initial total light transmittance, haze value- For Examples 1-15 and Comparative Examples 1-14, total light transmittance and haze values ​​were measured in accordance with JIS K7361-1. The NHD7000SP, manufactured by Nippon Denshoku Industries Co., Ltd., was used as the measuring device. The obtained total light transmittance was defined as the initial total light transmittance. A higher initial total light transmittance indicates better light transmission, and a lower haze value indicates better low-haze properties. These results are shown in Table 2.

[0125] -Water contact angle- For Examples 1-15 and Comparative Examples 1-12, the water contact angle of the anti-fog layer surface was measured. 2 μl of water was dropped onto the anti-fog layer, and the contact angle of the droplet was measured 3 seconds after the water contacted the anti-fog layer. The obtained measurement value was defined as the water contact angle. The measurement temperature was 23±3°C. A contact angle meter "DM-501" manufactured by Kyowa Interface Chemical Co., Ltd. was used as the measuring device, and the θ / 2 method was used to measure the contact angle. A larger water contact angle indicates better water repellency. The results are shown in Table 2.

[0126] - Anti-fogging properties from exhalation - For Examples 1-15 and Comparative Examples 1-12, exhaled air was blown onto the surface of the anti-fog layer from a distance of 3 cm for 3 seconds, and the surface of the anti-fog layer was visually observed. For Comparative Example 13, exhaled air was blown onto the surface of the blue glass from a distance of 3 cm for 3 seconds, and the surface of the blue glass was visually observed. For Comparative Example 14, exhaled air was blown onto the surface of the TAC film from a distance of 3 cm for 3 seconds, and the surface of the TAC film was visually observed. An ABC evaluation was then performed according to the following criteria. A, B, and C indicate the order of increasing anti-fog performance. A: No fogging occurred on the surface while I was blowing my breath onto it. B: While blowing exhaled air onto the surface, condensation formed, but after stopping the exhalation, the condensation disappeared. C: While blowing exhaled air onto the surface, fogging occurred, and the fogging remained even after stopping the exhalation. The results are shown in Table 2.

[0127] <Weather resistance evaluation> Using the "Suga X75" manufactured by Suga Test Instruments Co., Ltd., light was irradiated under the following conditions for Examples 1-15, Comparative Example 1, Comparative Example 9, Comparative Example 11, and Comparative Example 12. The light was irradiated so that the surface of the blue glass plate of the finely textured laminate was facing the light source. Light source: 7.5kW water-cooled xenon lamp, "WX 7.5" Inner filter: Quartz Outer filter: #295 Cumulative irradiance: 160 W / m2 (Wavelength: 300~400nm) BP temperature: 63℃ Humidity: 50%RH Irradiation time: 500 hours or 1000 hours The total light transmittance of the micro-textured laminate after 500 hours of irradiation and after 1000 hours of irradiation was measured in accordance with JIS K7361-1. The total light transmittance of the micro-textured laminate after 500 hours of irradiation and the total light transmittance of the micro-textured laminate after 1000 hours of irradiation obtained from these measurements were defined as "total light transmittance @ 500h" and "total light transmittance @ 1000h," respectively. Next, the "total light transmittance difference at 500h" and the "total light transmittance difference at 1000h" were calculated using the following formulas. "Total light transmittance difference @500h" = "Total light transmittance @500h" - "Initial total light transmittance" "Total light transmittance difference @1000h" = "Total light transmittance @1000h" - "Initial total light transmittance" The smaller the absolute value of the calculated "total light transmittance difference @ 500h" and "total light transmittance difference @ 1000h", the better the weather resistance. Furthermore, for Comparative Examples 2-8, 10, 13, and 14, where any of the initial characteristic evaluation results were unsatisfactory, weather resistance evaluation was not performed. Also, for Comparative Example 1, where the absolute value of "total light transmittance difference @ 500h" was large, "total light transmittance difference @ 1000h" was not calculated. These results are shown in Table 2.

[0128] [Table 2]

[0129] As shown in Table 2, Examples 1 to 15, which followed the present invention, showed good results in initial characteristic evaluation (i.e., initial total light transmittance, haze value, water contact angle, and breath-fog resistance) and weather resistance evaluation. On the other hand, Comparative Examples 1 to 14, which did not satisfy one or more of the requirements of the present invention, either showed poor results in any of the initial characteristic evaluations or poor weather resistance evaluation. Specifically, Comparative Examples 2 to 8, Comparative Example 10, Comparative Example 13, and Comparative Example 14 were inferior to Examples 1 to 15 in either initial total light transmittance, haze value, or breath-fog resistance. Furthermore, Comparative Examples 1, 9, 11, and 12 showed good initial characteristic evaluations, but their weather resistance evaluations were inferior to Examples 1 to 15. Therefore, it can be seen that the resin composition of the present invention maintains its initial properties while exhibiting excellent weather resistance.

[0130] In the embodiment, a finely textured laminate was fabricated, and its initial properties and weather resistance were evaluated. The initial properties are thought to vary depending on the surface structure of the anti-fog layer. However, if the surface structure of the anti-fog layer is the same, the initial properties are thought to depend on the components and content of the resin composition forming the anti-fog layer. Furthermore, the reason why the values ​​of "total light transmittance difference @ 500h" and "total light transmittance difference @ 1000h" are large is thought to be due to the deterioration of the finely textured structure and the yellowing (absorption of visible light) of the anti-fog layer. By adjusting the components and content of the resin composition, the effect of yellowing of the anti-fog layer can be suppressed, so even in a laminate with a smooth surface for the anti-fog layer (the laminate of this embodiment), the values ​​of "total light transmittance difference @ 500h" and "total light transmittance difference @ 1000h" are small (i.e., excellent weather resistance), similar to the finely textured laminate. From the above, it is thought that the laminate of this embodiment maintains its initial properties while exhibiting excellent weather resistance. Furthermore, it is believed that the micro-textured laminate exhibits superior light transmittance and water repellency compared to a laminate with a smooth surface for the anti-fog layer, due to the micro-textured structure (moth-eye structure) on the surface of the anti-fog layer. [Industrial applicability]

[0131] According to the present invention, it is possible to provide a resin composition that maintains its initial properties while exhibiting excellent weather resistance. Furthermore, according to the present invention, a laminate can be provided using the resin composition described above. Furthermore, according to the present invention, it is possible to provide a finely textured laminate using the resin composition described above. Furthermore, according to the present invention, it is possible to provide an article comprising the above-described laminate or fine-textured laminate. [Explanation of symbols]

[0132] 1. Laminate 2 Base material 3. Anti-fog layer 11. Micro-textured laminate 12 Base material 13. Anti-fog layer 14 Fine uneven structure 15 Base section

Claims

1. Component (A) is a monomer having a (meth)acrylic group and a polyethylene glycol structure, Component (B) is N,N-dimethylacrylamide, As component (C), a monomer having a (meth)acrylic group and not having a polyethylene glycol structure, Component (D) is a photoradical initiator, Component (E) is a photocurable surface modifier having a fluorine atom or a polydimethylsiloxane structure, It contains, The monomer having a (meth)acrylic group and not having a polyethylene glycol structure is one or more selected from the group consisting of ethylene glycol di(meth)acrylate, tetramethylene glycol di(meth)acrylate, hexamethylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, glycerin tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, ditrimethylolpropane tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, and dipentaerythritol hexa(meth)acrylate. A resin composition characterized in that, when the total content of component (A), component (B), and component (C) is 100% by mass, the content of component (A) is 30% by mass or more and 55% by mass or less, the content of component (B) is 32% by mass or more and 55% by mass or less, and the content of component (C) is 10% by mass or more and 17% by mass or less.

2. The resin composition according to claim 1, wherein the content of component (E) is 0.1 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the total content of component (A), component (B), and component (C).

3. The invention comprises a base material and an anti-fogging layer formed by curing the resin composition described in claim 1 or 2 on the base material, The laminate is characterized in that the anti-fogging layer has a smooth surface.

4. The invention comprises a base material and an anti-fogging layer formed by curing the resin composition described in claim 1 or 2 on the base material, The anti-fogging layer has a fine uneven structure on its surface, A laminate with fine irregularities, characterized in that the fine irregularities structure consists of an irregularity pattern having a pitch less than or equal to the wavelength of visible light.

5. An article characterized by comprising the laminate described in claim 3.

6. An article characterized by comprising a finely textured laminate as described in claim 4.

Images