Antiviral products

Abstract

To provide an antiviral article capable of suppressing a problem of hue such as discoloration due to light.SOLUTION: An antiviral article 100 has a cured product layer 10. The cured product layer 10 contains a cured product 11 of a curable resin composition and particles 12 of an imidazole compound. It is preferable that the antiviral article 100 has the cured product layer 10 on a substrate 20. It is also preferable that the cured product layer 10 contains 0.5-20.0 pts.mass of the particles 12 of the imidazole compound based on 100 pts.mass of the cured product 11.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an antiviral article and an antiviral resin composition. [Background technology]

[0002] From the viewpoint of hygiene, antibacterial treatment has conventionally been carried out by applying an antibacterial composition to the surfaces of objects that people touch, such as interior materials for buildings, interior materials for vehicles, office automation equipment, and touch panels.

[0003] Antibacterial compositions or antibacterial articles have been proposed in, for example, Patent Documents 1 to 3. However, merely having antibacterial properties is not sufficient against viruses such as influenza viruses. That is, the antibacterial compositions or articles disclosed in Patent Documents 1 to 3 sometimes fail to provide satisfactory antiviral properties.

[0004] On the other hand, Patent Documents 4 and 5 have proposed compositions or articles having antiviral properties. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 63-265958 [Patent Document 2] Patent No. 3551201 [Patent Document 3] Patent No. 4840048 [Patent Document 4] Patent No. 6145758 [Patent Document 5] Patent No. 6229429 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0006] The antiviral resin composition of Patent Document 4 contains cuprous oxide particles, etc. Therefore, it is not possible to prevent the color (reddish brown) derived from the color of cuprous oxide.

[0007] The antiviral decorative sheet for interior use of Patent Document 5 is obtained by blending a silver-based inorganic additive or a zinc-based inorganic additive into the coating resin on the outermost surface of the decorative sheet. Of the additives disclosed in Patent Document 5, the latter zinc-based inorganic additive has a problem of biotoxicity. On the other hand, among the additives of Patent Document 5, the former silver-based inorganic additive is expensive but does not have the problem of biotoxicity. However, the former silver-based inorganic additive has the problem of discoloring to brown when exposed to light (visible light, ultraviolet light). In particular, when the amount of silver-based inorganic additive added is increased to exhibit antiviral properties, the problem of discoloration due to light becomes more pronounced.

[0008] An object of the present invention is to provide an antiviral article and an antiviral resin composition that can suppress color problems such as discoloration due to light. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention provides the following [1] and [2]. [1] An antiviral article having a cured material layer, the cured material layer comprising a cured material of a curable resin composition and particles of an imidazole-based compound. [2] An antiviral resin composition comprising a curable resin composition and particles of an imidazole-based compound. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide an antiviral article and an antiviral resin composition that can suppress color problems such as discoloration due to light. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a cross-sectional view showing one embodiment of the antiviral article of the present invention. [Figure 2] FIG. 1 is a cross-sectional view showing another embodiment of the antiviral article of the present invention. [Figure 3] FIG. 1 is a cross-sectional view showing another embodiment of the antiviral article of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] [Antiviral products] The antiviral article of the present invention is an article having a cured material layer, and the cured material layer contains a cured material of a curable resin composition and particles of an imidazole-based compound.

[0013] Generally, anything that has "antiviral properties" also has "antibacterial properties." Therefore, the antiviral article of the present invention and the antiviral resin composition of the present invention described below can be used not only for antiviral purposes but also for antibacterial purposes. Note that, because mold is a type of fungus, the antiviral article of the present invention and the antiviral resin composition of the present invention described below can also be used for antifungal purposes.

[0014] 1(A) to 1(E), 2(A) to 2(D), and 3 are cross-sectional views showing representative embodiments of an antiviral article 100 of the present invention. The antiviral article 100 in Figures 1(A) to (E), 2(A) to (D), and 3 has a cured material layer 10 containing a cured material 11 of a curable resin composition and particles 12 of an imidazole compound.

[0015] The antiviral article 100 in FIGS. 1(A) to 1(E) is formed of a single layer of a cured material layer 10. The cured material layer 10 in FIG. 1(A) contains imidazole compound particles 12 throughout the cured material layer 10 in both the thickness direction (Z-axis direction in the figure) and in-plane directions (directions within the XY plane in the figure). The cured material layer 10 in FIG. 1(B) contains imidazole compound particles 12 on the surface side (upper side in the figure) of the cured material layer 10. The cured material layer 10 in FIG. 1(C) contains imidazole compound particles 12 on the surface side (upper side in the figure) and back side (lower side in the figure) of the cured material layer 10. The cured material layer 10 in FIG. 1(D) contains imidazole compound particles 12 in a partial region in the in-plane direction on the surface side (upper side in the figure) of the cured material layer 10. The cured material layer 10 in Figure 1(E) contains particles 12 of an imidazole-based compound in a portion of the surface side (upper side of the figure) of the cured material layer 10 and in a portion of the back side (lower side of the figure) of the cured material layer 10. 1(A) to 1(E), there are no particular limitations on the location of the imidazole compound particles 12 in the cured material layer 10. However, from the viewpoint of enhancing antiviral properties, it is preferable that the imidazole compound particles 12 are present on the surface that comes into contact with people.

[0016] An antiviral article 100 consisting of a single layer of the cured material layer 10 as shown in Figs. 1(A) to (E) can be obtained, for example, by forming a laminate in which the cured material layer 10 is formed on a substrate having releasability, and then peeling off the substrate having releasability from the laminate.

[0017] The antiviral article 100 in FIGS. 2(A) to 2(D) has a cured material layer 10 on a substrate 20. The antiviral article 100 in Fig. 2(A) has a cured material layer 10 on the entire surface of one side of the substrate 20. The antiviral article 100 in Fig. 2(B) has a cured material layer 10 on the entire surface of both sides of the substrate 20. The antiviral article 100 in Fig. 2(C) has a cured material layer 10 on a partial region of one side of the substrate 20 (the + side in the Z axis direction in the figure). The antiviral article 100 in Fig. 2(D) has a cured material layer 10 on a partial region of one side of the substrate 20 (the + side in the Z axis direction in the figure) and on a partial region of the other side of the substrate 20 (the - side in the Z axis direction in the figure). 2(A) to 2(D), the cured material layer 10 may be formed on the entire surface of the substrate 20, or may be formed on a part of the surface of the substrate 20. Furthermore, as shown in FIGS. 2(A) to 2(D), the cured material layer 10 may be formed on only one surface of the substrate 20, or may be formed on both surfaces of the substrate 20.

[0018] The antiviral article 100 in Fig. 3 has a cured material layer 10 on a three-dimensional substrate 20. The three-dimensional substrate 20 in Fig. 3 is a door handle, and Fig. 3 shows a cross-sectional view of the door handle.

[0019] <Cured Product of Curable Resin Composition> The cured material layer contains a cured material of a curable resin composition. In this specification, the "cured material of a curable resin composition" may be abbreviated as "cured material." The cured product of the curable resin composition mainly serves as a binder resin. By including this cured product, the antiviral article has good scratch resistance and can more easily maintain its antiviral properties over a long period of time.

[0020] Examples of the cured product of the curable resin composition include a cured product of a thermosetting resin composition or a cured product of an ionizing radiation-curable resin composition, and among these, a cured product of an ionizing radiation-curable resin composition is preferred from the viewpoints of scratch resistance and production efficiency.

[0021] The thermosetting resin composition is a composition that contains at least a thermosetting resin and is a resin composition that is cured by heating. Examples of thermosetting resins include acrylic resins, urethane resins, phenolic resins, urea melamine resins, epoxy resins, unsaturated polyester resins, silicone resins, etc. In addition to these thermosetting resins, a curing agent, a curing catalyst, etc. are added to the thermosetting resin composition as needed.

[0022] Representative examples of ionizing radiation-curable resin compositions include electron beam-curable resin compositions and ultraviolet light-curable resin compositions, and among these, electron beam-curable resin compositions are preferred from the viewpoints of having less odor and being less prone to coloration because a polymerization initiator is not required. Furthermore, when the cured product layer contains an ultraviolet light absorber described below, electron beam-curable resin compositions are preferred in that they tend to increase the crosslink density of the cured product layer and improve scratch resistance and contamination resistance.

[0023] The ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter also referred to as "ionizing radiation curable compound"). The ionizing radiation-curable functional group is a group that crosslinks and cures upon irradiation with ionizing radiation, and preferred examples thereof include functional groups having an ethylenic double bond such as a (meth)acryloyl group, a vinyl group, and an allyl group. Further examples of the ionizing radiation-curable functional group include an epoxy group and an oxetanyl group. In this specification, the term "(meth)acryloyl group" refers to an acryloyl group or a methcroyl group, and the term "(meth)acrylate" refers to an acrylate or a methacrylate. Furthermore, ionizing radiation refers to electromagnetic waves or charged particle beams that have an energy quantum capable of polymerizing or crosslinking molecules. Typically, ultraviolet (UV) rays or electron beams (EB) are used, but it also includes other electromagnetic waves such as X-rays and gamma rays, and charged particle beams such as alpha rays and ion beams. Specifically, the ionizing radiation curable compound can be appropriately selected from polymerizable monomers and polymerizable oligomers (sometimes referred to as "polymerizable prepolymers") that have conventionally been used as ionizing radiation curable resins.

[0024] The ionizing radiation curable compound is preferably a compound having two or more ethylenically unsaturated bond groups, and more preferably a polyfunctional (meth)acrylate compound having two or more ethylenically unsaturated bond groups. The polyfunctional (meth)acrylate compound may be either a monomer or an oligomer.

[0025] Among the polyfunctional (meth)acrylate compounds, examples of bifunctional (meth)acrylate monomers include ethylene glycol di(meth)acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, and 1,6-hexanediol diacrylate. Examples of trifunctional or higher (meth)acrylate monomers include trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol tetra(meth)acrylate, and isocyanuric acid-modified tri(meth)acrylate. Examples of the polyfunctional (meth)acrylate oligomer include acrylate polymers such as urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, and polyether (meth)acrylate.

[0026] Urethane (meth)acrylates can be obtained, for example, by reacting a polyhydric alcohol and an organic diisocyanate with a hydroxy (meth)acrylate.

[0027] Preferred epoxy (meth)acrylates are (meth)acrylates obtained by reacting a tri- or higher functional aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like with (meth)acrylic acid; (meth)acrylates obtained by reacting a di- or higher functional aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like with a polybasic acid and (meth)acrylic acid; and (meth)acrylates obtained by reacting a di- or higher functional aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like with a phenol and (meth)acrylic acid.

[0028] The above ionizing radiation curable resins can be used alone or in combination of two or more.

[0029] When the ionizing radiation curable compound is an ultraviolet ray curable compound, the ionizing radiation curable resin composition preferably contains additives such as a photopolymerization initiator and a photopolymerization accelerator. The photopolymerization initiator may be one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzil dimethyl ketal, benzoyl benzoate, α-acyloxime ester, thioxanthones, and the like. The photopolymerization accelerator can reduce polymerization inhibition caused by air during curing and increase the curing rate, and examples thereof include one or more selected from p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester, etc.

[0030] The content of the cured product of the curable resin composition is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 90% by mass or more, and most preferably 100% by mass, based on the total amount of the binder resin.

[0031] <Imidazole compound particles> The cured material layer contains particles of an imidazole-based compound. Metal-based antiviral agents such as cuprous oxide particles and silver-based inorganic additives have color problems, such as being colored from the beginning or discoloring due to the influence of light, etc. On the other hand, imidazole-based compound particles do not cause the above-mentioned color problem. Furthermore, in the present invention, the imidazole-based compound is present in the form of particles in the cured material layer. In other words, the imidazole-based compound is present in the form of particles without dissolving in the ink for the cured material layer (antiviral resin composition). Therefore, during the process of forming the cured material layer, the particles of the imidazole-based compound are more likely to float up, making it possible to easily unevenly distribute the particles of the imidazole-based compound on one surface side of the cured material layer. Furthermore, by unevenly distributing the particles of the imidazole-based compound on one surface side of the cured material layer, it is possible to reduce the amount of imidazole-based compound added necessary to obtain a predetermined antiviral property, and therefore it is possible to easily prevent a decrease in the scratch resistance of the cured material layer. Typically, the imidazole compound is dissolved in the ink (antiviral resin composition) for the cured material layer before use. The reason for this is to uniformly diffuse the imidazole compound within the cured material layer, allowing the effect of the imidazole compound to be exerted throughout the cured material layer. Therefore, when using an imidazole compound in a typical manner, the imidazole compound does not exist in a particulate state within the cured material layer. In other words, the present invention differs from cured material layers containing general-purpose imidazole compounds in that the imidazole compound remains in a particulate state.

[0032] In order to facilitate uneven distribution of the imidazole compound particles on the surface of the cured material layer, it is preferable to select a curable resin composition that satisfies the relationship "specific gravity of the imidazole compound particles < specific gravity of the curable resin composition." Furthermore, using an imidazole compound with a high degree of polarity is preferable because it facilitates uneven distribution of the imidazole compound particles on the surface of the cured material layer. Furthermore, when the solvent contained in the ink for the cured material layer volatilizes, it is possible to facilitate floating of the imidazole compound particles to the surface of the cured material layer, thereby facilitating uneven distribution of the imidazole compound particles near the surface of the cured material layer.

[0033] Imidazole compounds are compounds that contain an imidazole skeleton as a molecular structural unit. In the present invention, various imidazole compounds that maintain their particle shape in the ink for the cured product layer (antiviral resin composition) and the cured product layer can be used. Such imidazole compounds are preferably those that are poorly soluble in water and organic solvents, such as methyl benzimidazol-2-ylcarbamate (also known as carbendazim) and polymerized imidazole compounds. However, care must be taken because even methyl benzimidazol-2-ylcarbamate (also known as carbendazim) and polymerized imidazole compounds may dissolve in certain solvents. For example, for methyl benzimidazol-2-ylcarbamate (also known as carbendazim), it is preferable to use methyl ethyl ketone, ethyl acetate, or the like as a solvent.

[0034] The shape of the particles of the imidazole compound is not particularly limited, and examples thereof include spherical, ellipsoidal, polyhedral, and scale-like shapes.

[0035] The average particle size of the particles of the imidazole compound is preferably 0.1 to 10.0 μm, more preferably 0.5 to 8.0 μm, and even more preferably 1.0 to 7.0 μm. By setting the average particle size to 0.1 μm or more, the ink for the cured layer can be more stable, while by setting the average particle size to 10.0 μm or less, it is possible to easily prevent poor appearance, reduced scratch resistance and stain resistance, and whitening of the coating film due to protrusion of the imidazole compound particles from the surface of the cured layer.

[0036] When the average particle size of the imidazole compound particles is defined as D and the thickness of the cured material layer is defined as T, D / T is preferably 1.0 or less, more preferably 0.7 or less, and even more preferably 0.5 or less. By setting D / T to 1.0 or less, it is possible to easily suppress poor appearance, reduced scratch resistance and stain resistance, and whitening of the coating film caused by particles of the imidazole compound protruding from the surface of the cured layer. The lower limit of D / T is not particularly limited, but is usually 0.01 or more, and preferably 0.05 or more.

[0037] In this specification, the average particle size refers to the mass average value d50 measured in particle size distribution measurement by laser light diffraction method.

[0038] The content of the imidazole compound particles is preferably 0.5 to 20.0 parts by mass, more preferably 1.0 to 13.0 parts by mass, and even more preferably 3.0 to 10.0 parts by mass, per 100 parts by mass of the cured product. By setting the content of the imidazole compound particles to 0.5 parts by mass or more, it is possible to easily improve the antiviral properties. By setting the content of the imidazole compound particles to 20.0 parts by mass or less, it is possible to prevent deterioration in coating film properties such as coating film strength and scratch resistance. Furthermore, by setting the content of the imidazole compound particles to 20.0 parts by mass or less, it is possible to easily prevent deterioration in stain resistance and whitening of the coating film due to the imidazole compound particles protruding from the surface of the cured product layer.

[0039] The cured material layer preferably contains substantially no silver or silver ions. This is because silver-based antiviral agents containing silver or silver ions cause discoloration to brown when exposed to light. "Substantially free" means that the content of silver and silver ions relative to the total solid content of the cured material layer is 0.1% by mass or less, preferably 0.01% by mass or less, and more preferably 0.001% by mass or less. Furthermore, it is preferable that the cured material layer is substantially free of metals and metal ions, since metals and metal ions other than silver or silver ions can also cause color. "Substantially free" means that the content of metals and metal ions is 0.1% by mass or less, preferably 0.01% by mass or less, and more preferably 0.001% by mass or less, based on the total solid content of the cured material layer.

[0040] <Additives> The cured product layer may contain additives such as antioxidants, light stabilizers, and ultraviolet absorbers.

[0041] Antioxidants Examples of the antioxidant include phosphorus-based antioxidants, sulfur-based antioxidants, and phenol-based antioxidants. The content of the antioxidant is preferably 0.1 to 10 parts by mass, more preferably 0.3 to 5 parts by mass, and even more preferably 0.5 to 3.0 parts by mass, per 100 parts by mass of the cured product.

[0042] <Light stabilizer> Examples of light stabilizers include aromatic compounds, amine compounds, organic acid compounds, catechin compounds, and hindered amine compounds, among which hindered amine compounds are preferred. Hindered amine compounds have a structure containing a 2,2,6,6-tetramethylpiperidine skeleton in the molecule. The content of the light stabilizer is preferably 0.1 to 10 parts by mass, more preferably 0.3 to 8.0 parts by mass, and even more preferably 1.0 to 5.0 parts by mass, per 100 parts by mass of the cured product. Note that it is preferable to include a hindered amine compound as the light stabilizer in the above range.

[0043] <Ultraviolet absorber> Examples of the ultraviolet absorber include benzotriazole-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, and triazine-based ultraviolet absorbers, with triazine-based ultraviolet absorbers being preferred. One or more types of ultraviolet absorbers can be used.

[0044] Among the triazine-based ultraviolet absorbers, hydroxyphenyltriazine-based ultraviolet absorbers in which three organic groups selected from hydroxyphenyl groups, alkoxyphenyl groups, and organic groups containing these groups are linked to a triazine ring are more preferred, and hydroxyphenyltriazine-based ultraviolet absorbers represented by the following general formula (A) are even more preferred. Because the hydroxyphenyltriazine-based ultraviolet absorber has a branched structure, it is expected to be less likely to bleed out from the cured product layer, and to achieve excellent weather resistance over a longer period of time. Furthermore, ultraviolet absorbers having an ethylenic double bond, such as a (meth)acryloyl group, a vinyl group, or an allyl group, are preferred because they are more likely to suppress bleeding out.

[0045] [ka]

[0046] In general formula (A), R 11 is a divalent organic group, and R 12 is -C(=O)OR 15 and R 13 , R 14 and R 15 are each independently a monovalent organic group, and n 11 and n 12 are each independently an integer of 1 to 5.

[0047] R 11 Examples of the divalent organic group include aliphatic hydrocarbon groups such as alkylene groups and alkenylene groups, and from the viewpoint of weather resistance, alkylene groups are preferred, and the number of carbon atoms therein is preferably 1 to 20, more preferably 1 to 12, still more preferably 1 to 8, and particularly preferably 1 to 4. The alkylene group and alkenylene group may be linear, branched, or cyclic, but linear or branched groups are preferred. Examples of alkylene groups having 1 to 20 carbon atoms include methylene, 1,1-ethylene, 1,2-ethylene, 1,3-propylene, 1,2-propylene, 2,2-propylene, and other various propylene groups (hereinafter, "various" refers to linear, branched, and isomeric forms thereof), various butylene groups, various pentylene groups, various hexylene groups, various heptylene groups, various octylene groups, various nonylene groups, various decylene groups, various undecylene groups, various dodecylene groups, various tridecylene groups, various tetradecylene groups, various pentadecylene groups, various hexadecylene groups, various heptadecylene groups, various octadecylene groups, various nonadecylene groups, and various icosylene groups.

[0048] R 13 and R 14 Examples of the monovalent organic group include an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, and an arylalkyl group. Of these, aromatic hydrocarbon groups such as an aryl group and an arylalkyl group are preferred, and an aryl group is more preferred. 13 and R 14 The monovalent organic group is preferably a phenyl group. The aryl group preferably has 6 to 20 carbon atoms, more preferably 6 to 12 carbon atoms, and even more preferably 6 to 10 carbon atoms, such as a phenyl group, various methylphenyl groups, various ethylphenyl groups, various dimethylphenyl groups, various propylphenyl groups, various trimethylphenyl groups, various butylphenyl groups, and various naphthyl groups. The arylalkyl group preferably has 7 to 20 carbon atoms, more preferably 7 to 12 carbon atoms, and even more preferably 7 to 10 carbon atoms, such as a benzyl group, a phenethyl group, various phenylpropyl groups, various phenylbutyl groups, various methylbenzyl groups, various ethylbenzyl groups, various propylbenzyl groups, various butylbenzyl groups, and various hexylbenzyl groups.

[0049] R 15Examples of the monovalent organic group include an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, and an arylalkyl group. Of these, an aliphatic hydrocarbon group such as an alkyl group or an alkenyl group is preferred, and an alkyl group is more preferred. That is, R 12 As the alkyl ester group, an alkyl ester group or an alkenyl ester group is preferred, and an alkyl ester group is more preferred. The alkyl group is preferably an alkyl group having 1 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, and even more preferably 6 to 12 carbon atoms, such as a methyl group, an ethyl group, various propyl groups, various butyl groups, various pentyl groups, various hexyl groups, various octyl groups, various nonyl groups, various decyl groups, various undecyl groups, various dodecyl groups, various tridecyl groups, various tetradecyl groups, various pentadecyl groups, various hexadecyl groups, various heptadecyl groups, various octadecyl groups, various nonadecyl groups, and various icosyl groups. The alkenyl group is preferably an alkenyl group having 2 to 20 carbon atoms, more preferably 3 to 16 carbon atoms, and even more preferably 6 to 12 carbon atoms, such as a vinyl group, various propenyl groups, various butenyl groups, various pentenyl groups, various hexenyl groups, various octenyl groups, various nonenyl groups, various decenyl groups, various undecenyl groups, various dodecenyl groups, various tridecenyl groups, various tetradecenyl groups, various pentadecenyl groups, various hexadecenyl groups, various heptadecenyl groups, various octadecenyl groups, various nonadecenyl groups, and various icosenyl groups.

[0050] More specifically, the hydroxyphenyltriazine compound represented by the general formula (A) is R 11 is an alkylene group having 1 to 20 carbon atoms, and R 12 and R 15 is an alkyl ester group which is an alkyl group having 1 to 20 carbon atoms, and R 13 and R 14 is an aryl group having 6 to 20 carbon atoms, and n 11 and n 12 Hydroxyphenyltriazine compounds having a value of 1 are preferred, and R 11 is an alkylene group having 1 to 12 carbon atoms, and R 12 and R15 is an alkyl ester group having 2 to 16 carbon atoms, and R 13 and R 14 is an aryl group having 6 to 12 carbon atoms, and n 11 and n 12 Hydroxyphenyltriazine compounds in which R is 1 are more preferred, 11 is an alkylene group having 1 to 8 carbon atoms, and R 12 R 15 and an alkyl ester group, which is an alkyl group having 6 to 12 carbon atoms, R 13 and R 14 is an aryl group having 6 to 10 carbon atoms, and n 11 and n 12 More preferred are hydroxyphenyltriazine compounds in which R 11 is an alkylene group having 1 to 4 carbon atoms, and R 12 and R 15 is an ester group which is an alkyl group having 8 carbon atoms, and R 13 and R 14 is a phenyl group, and n 11 and n 12 Hydroxyphenyltriazine compounds having a molar ratio of 1 are particularly preferred.

[0051] The content of the ultraviolet absorber is preferably 0.2 to 10.0 parts by mass, more preferably 0.5 to 5.0 parts by mass, and even more preferably 1.0 to 4.0 parts by mass, per 100 parts by mass of the cured product.

[0052] The cured product layer may contain an extender pigment, which is used, for example, to adjust the design of the antiviral article. Examples of extender pigments include inorganic particles such as silica, alumina, calcium carbonate, aluminosilicate, and barium sulfate, and organic particles such as polyethylene, urethane resin, polycarbonate, and polyamide (nylon). The shape of the extender pigment is not particularly limited, but is preferably polyhedral, spherical, scaly, etc. The average particle size of the extender pigment is usually about 1 to 10 μm, preferably 3 to 8 μm.

[0053] If necessary, the cured material layer may contain a colorant to be colored to a desired hue, brightness, and saturation. The colorant may be appropriately selected from the same colorants as those used in the colored layer and the design layer described below. By coloring the cured material layer with a colorant to an appropriate color (hue, brightness, and saturation), the design appearance can be improved, and discoloration of the cured material layer caused by light or the like can be made less noticeable by coloring, which, together with the discoloration reduction effect of the benzimidazole compound particles, can further improve the discoloration reduction effect of the cured material layer.

[0054] <Thickness> The thickness of the cured product layer can be, for example, from 1.0 μm to 10,000 μm (1 cm) in view of the balance between processing characteristics and scratch resistance. When the antiviral article is composed of a single layer of the cured material, it is preferable that the thickness of the cured material layer is relatively large. On the other hand, in the case of a form in which a cured product layer is formed by coating (applying) on a substrate, it is preferable that the thickness of the cured product layer is thin, taking into consideration that the substrate is responsible for self-supporting properties and durability against external forces, that the antiviral effect saturates at a certain thickness, and that an increase in the thickness of the cured product layer leads to disadvantages such as a decrease in post-processing suitability and a rise in material costs. Specifically, from the viewpoint of a balance between processing properties and scratch resistance, the thickness of the cured product layer is preferably 1.5 μm to 30 μm, more preferably 2 μm to 20 μm, and even more preferably 3 μm to 15 μm.

[0055] <Formation method> The cured material layer can be formed, for example, by applying, drying, and curing an ink for the cured material layer, which contains materials constituting the cured material layer (such as a curable resin composition and particles of an imidazole-based compound) and a solvent added as necessary, onto a substrate. The cured material layer can also be formed by applying, drying, and curing the ink for the cured material layer onto a substrate having releasability to form a cured material layer, and then transferring the cured material layer to another substrate, etc. As described above, by applying an ink for the cured material layer, which contains materials constituting the cured material layer (such as a curable resin composition and particles of an imidazole-based compound) and a solvent, to a substrate, followed by drying and curing, to form a cured material layer, the particles of the imidazole-based compound can be made to easily rise to the surface of the cured material layer when the solvent evaporates, and the particles of the imidazole-based compound can be made to easily be unevenly distributed near the surface of the cured material layer.

[0056] <Layer structure> The antiviral article of the present invention may be a single layer of the cured product layer, or may have layers other than the cured product layer. An antiviral article consisting of a single layer of a cured material layer can be obtained, for example, by producing a laminate by forming a cured material layer on a substrate having releasability, and then peeling off the substrate having releasability from the laminate. Examples of layers other than the cured product layer that the antiviral article has include a substrate, a primer layer, a decorative layer, a transparent resin layer, an adhesive layer, etc. Examples of layer configurations of antiviral articles include the following (1) to (12). In the following (1) to (12), " / " indicates the interface between each layer. Examples of layers other than the cured layer that the antiviral article may have include functional layers such as a magnetic layer for magnetic recording, a conductive layer that functions as a circuit, copper wire for current, or electromagnetic wave shielding layer, a gas barrier layer that suppresses the transmission of gases such as water vapor and oxygen, a light-reflecting layer that reflects visible light with high reflectance, and an antireflection layer that suppresses reflection of visible light. These functional layers can be formed in any of the following laminate structures (1) to (12) depending on the function of each layer.

[0057] (1) Cured material layer (2) Base material / cured material layer (3) Substrate / Primer layer / Cured material layer (4) Base material / decorative layer / hardened material layer (5) Base material / transparent resin layer / cured material layer (6) Base material / adhesive layer / transparent resin layer / cured material layer (7) Base material / adhesive layer / decorative layer / transparent resin layer / cured material layer (8) Base material / decorative layer / adhesive layer / transparent resin layer / cured material layer (9) Substrate / Transparent Resin Layer / Primer Layer / Cured Material Layer (10) Substrate / Adhesive Layer / Transparent Resin Layer / Primer Layer / Cured Material Layer (11) Substrate / Adhesive Layer / Decorative Layer / Transparent Resin Layer / Primer Layer / Cured Material Layer (12) Base material / decorative layer / adhesive layer / transparent resin layer / primer layer / cured material layer

[0058] From the viewpoint of ease of handling, the antiviral article preferably has a configuration in which a cured product layer is provided on a substrate.

[0059] 《Base material》 The form of the substrate is not particularly limited, and may include flat forms such as films, sheets, and plates, as well as three-dimensional forms such as polyhedrons, polygonal prisms, cylinders, spheres, and spheroids. Although films, sheets, and plates are often referred to as films, sheets, and plates in the order of relatively thinnest thickness, no distinction is made between these three in this specification unless otherwise specified.

[0060] Examples of materials constituting the substrate include resins, metals, non-metallic inorganic materials, fibrous materials, and wood-based materials, and can be appropriately selected depending on the application.

[0061] The substrate may be a single layer, or may be a laminate of two or more layers made of the above materials. When the substrate is a laminate of two or more layers, it is preferable that two or more layers of different materials are laminated so that the properties of the materials in each layer complement each other. Examples of substrates made of two or more layers are A to J below. Note that " / " indicates the interface between each layer. (A) Resin / wood material (B) Resin / metal (C) Resin / fibrous materials (D) Resin / nonmetallic inorganic material (E) Resin 1 / Resin 2 (F) Metal / wood materials (G) Metal / non-metallic inorganic materials (H) Metal / fibrous materials (I) Metal 1 / Metal 2 (J) Non-metallic inorganic materials / fibrous materials

[0062] In the above E, resin 1 and resin 2 represent different types of resins (for example, resin 1 is an olefin resin and resin 2 is an acrylic resin). Also, in the above H, metal 1 and metal 2 represent different types of metals (for example, metal 1 is copper and metal 2 is chromium).

[0063] Furthermore, when the substrate is a laminate such as those A to J above, a layer (adhesive layer or the like) for strengthening adhesive strength may be provided between the constituent layers of the laminate.

[0064] Resins used as the substrate include various synthetic resins and natural resins, including thermoplastic resins and curable resins.

[0065] Examples of thermoplastic resins include olefin resins such as polyethylene, polypropylene, polymethylpentene, ionomers, and various olefin-based thermoplastic elastomers; vinyl chloride resins such as polyvinyl chloride, polyvinylidene chloride, and vinyl chloride-vinyl acetate copolymers; polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, ethylene glycol-terephthalic acid-isophthalic acid copolymers, and polyester-based thermoplastic elastomers; acrylic resins such as polymethyl (meth)acrylate, polyethyl (meth)acrylate, polybutyl (meth)acrylate, and methyl (meth)acrylate-butyl (meth)acrylate copolymers; polyamide resins typified by nylon 6 or nylon 66; cellulose resins such as cellulose triacetate, cellophane, and celluloid; styrene resins such as polystyrene, acrylonitrile-styrene copolymers, and acrylonitrile-butadiene-styrene copolymers (ABS); polyvinyl alcohol, ethylene-vinyl acetate copolymers, ethylene-vinyl alcohol copolymers, polycarbonate resins, polyarylate resins, and polyimide resins. Examples of the curable resin include the thermosetting resins and ionizing radiation curable resins exemplified for the cured product layer. Natural resins include natural rubber, pine resin, and amber.

[0066] Examples of metals that can be used as the substrate include aluminum or aluminum-containing alloys such as duralumin, iron or iron-containing alloys such as carbon steel and stainless steel, copper or copper-containing alloys such as brass and bronze, gold, silver, chromium, nickel, cobalt, tin, titanium, etc. Metal substrates that have been plated with these metals or the like can also be used.

[0067] Examples of non-metallic inorganic materials used as the substrate include non-ceramic ceramic materials such as cement, ALC (aerated lightweight concrete), gypsum, calcium silicate, and wood chip cement; ceramic ceramic materials such as porcelain, earthenware, glass, and enamel; and natural stones such as limestone (including marble), granite, and andesite.

[0068] Examples of fibrous materials used as substrates include tissue paper, kraft paper, wood-free paper, Japanese paper, titanium paper, linter paper, parchment paper, parchment paper, glassine paper, wallpaper backing paper, paperboard and gypsum board base paper, and other papers; woven or nonwoven fabrics made of fibers such as polyester resin fiber, acrylic resin fiber, protein-based or cellulose-based natural fibers such as silk, cotton, and hemp; glass fiber; and carbon fiber. These papers may further contain resins such as acrylic resin, styrene-butadiene rubber, melamine resin, and urethane resin (impregnated after papermaking or inserted during papermaking) to increase the strength between the fibers of the paper substrate or between other layers of the paper and to prevent fluffing. Examples of resin-added papers include inter-fiber reinforced paper and resin-impregnated paper. Furthermore, an example of a substrate in which a resin layer is laminated onto a fibrous material layer is wallpaper base paper, which is often used in the building materials field and has a resin layer such as a vinyl chloride resin layer, an olefin resin layer, or an acrylic resin layer laminated on the surface of wallpaper backing paper.

[0069] The shape and dimensions of the substrate are not particularly limited and may be appropriately selected depending on the application, desired performance properties and processability. When the substrate is a flat film, sheet, or plate, the thickness is a typical dimension in the design of the article. There are no particular restrictions on the thickness, but it is generally set to about 10 μm or more and 10 cm or less from the viewpoints of manufacturing processability, mechanical strength, ease of use and handling, and economic efficiency. In the case of a film or sheet, a thickness of about 20 μm or more and 300 μm or less is usually selected, and in the case of a plate, a thickness of about 1 mm or more and 2 cm or less is usually selected.

[0070] To improve adhesion between the substrate and other layers constituting the antiviral article or between the antiviral article and a member to be laminated thereto, one or both surfaces of the substrate can be subjected to a surface treatment such as a physical surface treatment by an oxidation method or a roughening method, or a chemical surface treatment. Examples of oxidation methods include corona discharge treatment, chromium oxidation treatment, flame treatment, hot air treatment, ozone-ultraviolet treatment, etc., and examples of roughening methods include sandblasting, solvent treatment, etc. These surface treatments are appropriately selected depending on the type of substrate, but corona discharge treatment is generally preferred in terms of the effect of the surface treatment and operability.

[0071] <Primer layer> The antiviral article preferably has a primer layer in contact with the substrate-side surface of the cured material layer. The primer layer improves adhesion between the substrate and the cured material layer, making it easier to ensure long-term interlayer adhesion when exposed to ultraviolet light (so-called weather-resistant adhesion) and improve scratch resistance. Examples of cases in which antiviral articles are exposed to ultraviolet rays include cases in which the antiviral article is installed, constructed, or used in places where sunlight containing ultraviolet light shines in, such as near a window; inside a kitchen, refrigerator, or cupboard where a sterilizing mercury lamp is installed; or outdoors where it is exposed to direct sunlight.

[0072] The primer layer is mainly composed of a binder resin, and may contain additives such as an ultraviolet absorber and a light stabilizer, if necessary. Preferred examples of binder resins include urethane resins, acrylic polyol resins, acrylic resins, ester resins, amide resins, butyral resins, styrene resins, urethane-acrylic copolymers, polycarbonate-based urethane-acrylic copolymers (urethane-acrylic copolymers derived from polymers (polycarbonate polyols) having carbonate bonds in the polymer main chain and two or more hydroxyl groups at the terminals and side chains), vinyl chloride-vinyl acetate copolymer resins, vinyl chloride-vinyl acetate-acrylic copolymer resins, chlorinated propylene resins, nitrocellulose resins (nitrocellulose), and cellulose acetate resins. These may be used alone or in combination. Furthermore, the binder resin may be a resin obtained by adding a curing agent such as an isocyanate-based curing agent or an epoxy-based curing agent to the resin and crosslinking and curing the resin. Among these, a polyol-based resin such as an acrylic polyol resin is preferably crosslinked and cured with an isocyanate-based curing agent, and an acrylic polyol resin is more preferably crosslinked and cured with an isocyanate-based curing agent.

[0073] The primer layer preferably contains an ultraviolet absorber and / or a light stabilizer to further improve weather resistance. General-purpose ultraviolet absorbers and light stabilizers can be used.

[0074] The thickness of the primer layer is preferably 0.01 μm or more and 10 μm or less, more preferably 0.7 μm or more and 8 μm or less, and even more preferably 1.0 μm or more and 6 μm or less.

[0075] The antiviral article may have a back primer layer on the side of the substrate opposite the cured product layer for the purpose of improving adhesion to an adherend, etc. The antiviral article may also have a pressure-sensitive adhesive layer on the side of the substrate opposite the cured layer for the purpose of bonding to an adherend. It is preferable to form a peelable separator on the surface of the pressure-sensitive adhesive layer opposite the substrate.

[0076] 《Transparent resin layer》 The antiviral article may have a transparent resin layer between the substrate and the cured product layer from the viewpoint of increasing strength, etc. In particular, when the substrate is a resin substrate, it is preferable that the antiviral article have a transparent resin layer. When the antiviral article has a primer layer, the transparent resin layer is preferably located between the substrate and the primer layer. When the antiviral article has a decorative layer, the transparent resin layer is preferably located between the decorative layer and the cured product layer from the viewpoint of protecting the decorative layer.

[0077] Examples of resins constituting the transparent resin layer include polyolefin resins, polyester resins, polycarbonate resins, acrylonitrile-butadiene-styrene resins (hereinafter also referred to as "ABS resins"), acrylic resins, vinyl chloride resins, etc. Among these, polyolefin resins are preferred from the viewpoint of processability. Furthermore, two or more of these exemplified resins may be laminated or mixed for use. From the viewpoint of processability, the content of polyolefin resin in the transparent resin layer is preferably 50% by mass or more, more preferably 70% by mass or more, and even more preferably 90% by mass or more, of the total resin components of the transparent resin layer.

[0078] Examples of polyolefin resins for the transparent resin layer include polyethylene (low density, medium density, high density), polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, propylene-butene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-propylene-butene copolymer, etc. Among these, polyethylene (low density, medium density, high density), polypropylene, ethylene-propylene copolymer, and propylene-butene copolymer are preferred, and polypropylene is more preferred.

[0079] The transparent resin layer may contain additives such as an ultraviolet absorber, a light stabilizer, and a colorant. The thickness of the transparent resin layer is preferably from 20 μm to 150 μm, more preferably from 40 μm to 120 μm, and even more preferably from 60 μm to 100 μm, from the viewpoint of a balance between scratch resistance, processability, and weather resistance.

[0080] Decorative Layer From the viewpoint of improving the design, the antiviral article preferably has a decorative layer at any location on the antiviral article. From the viewpoint of improving the weather resistance of the decorative layer, the decorative layer is preferably formed on a side closer to the substrate. For example, when the antiviral article has a primer layer, the decorative layer is preferably located between the substrate and the primer layer. Furthermore, when the antiviral article has a transparent resin layer, the decorative layer is preferably located between the substrate and the transparent resin layer.

[0081] The decorative layer may be formed on the entire surface of the antiviral article, or may be formed only on a part of it. When the decorative layer covers the outer surface of the cured material layer, it is preferable to form the decorative layer only on a partial region so as not to inhibit the expression of the antiviral properties.

[0082] Examples of the decorative layer include a colored layer formed by applying ink in a solid manner, a patterned layer formed by printing ink as a pattern, and a thin metal film. Examples of patterns (designs) that can be expressed by the decorative layer include wood grain patterns such as tree rings and vessel grooves on the surface of wooden boards; stone grain patterns on the surface of stone slabs such as marble and granite; fabric grain patterns on the surface of fabric; leather grain patterns on the surface of leather; tile patterns including grooves; brickwork patterns including grooves; sand grain patterns; pear-skin patterns; patterns consisting of an arrangement of multiple concave and convex stripes extending in parallel directions (so-called ``line-like concave and convex patterns'' or ``ray-carved patterns''); and abstract patterns such as geometric patterns, letters, figures, polka dots, and floral designs.

[0083] The ink used for the colored layer and the design layer is a mixture of a binder resin with an appropriate amount of a colorant such as a pigment or dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, a curing agent, an ultraviolet absorber, a light stabilizer, etc. The binder resin for the colored layer and the design layer is not particularly limited, and examples thereof include urethane resin, acrylic polyol resin, acrylic resin, ester resin, amide resin, butyral resin, styrene resin, urethane-acrylic copolymer, vinyl chloride-vinyl acetate copolymer resin, vinyl chloride-vinyl acetate-acrylic copolymer resin, chlorinated propylene resin, nitrocellulose resin, cellulose acetate resin, etc. In addition, various types of resins can be used, such as one-component curing resins and two-component curing resins containing a curing agent such as an isocyanate compound.

[0084] The colorant is not particularly limited, and examples thereof include inorganic pigments such as carbon black (ink), iron black, titanium white, antimony white, yellow lead, titanium yellow, red iron oxide, cadmium red, ultramarine blue, and cobalt blue; organic pigments or dyes such as quinacridone red, isoindolinone yellow, nickel azo complex, phthalocyanine blue, and azomethine azo black; metal pigments consisting of flaky flakes of aluminum, brass, or the like; and pearlescent pigments consisting of flaky flakes of titanium dioxide-coated mica, basic lead carbonate, or the like. The content of the colorant is preferably 5 parts by mass or more and 90 parts by mass or less, more preferably 15 parts by mass or more and 80 parts by mass or less, and even more preferably 30 parts by mass or more and 70 parts by mass or less, relative to 100 parts by mass of the resin constituting the colored layer and the pattern layer.

[0085] The color layer and the design layer may contain additives such as ultraviolet absorbers, light stabilizers, and colorants. The thickness of the colored layer and the patterned layer may be selected appropriately depending on the desired pattern, but from the viewpoint of concealing the base color of the adherend and improving the design, it is preferably 0.5 μm or more and 20 μm or less, more preferably 1 μm or more and 10 μm or less, and even more preferably 2 μm or more and 5 μm or less.

[0086] Examples of metal thin films include thin films of simple metal elements such as gold, silver, copper, tin, iron, nickel, chromium, and cobalt, and thin films of alloys containing two or more of the above metal elements. Examples of alloys include brass, bronze, and stainless steel. The metal thin film can have a thickness of about 0.1 μm to 1 μm.

[0087] 《Adhesive layer》 The antiviral article may have an adhesive layer.

[0088] For example, when the antiviral article has a transparent resin layer, it is preferable to form an adhesive layer between the substrate and the transparent resin layer in order to improve the adhesion between the two layers. When a decorative layer is further provided between the substrate and the transparent resin layer, the positional relationship between the adhesive layer and the decorative layer is not particularly limited. Specifically, the decorative layer, adhesive layer, and transparent resin layer may be provided in this order from the side closest to the substrate, or the adhesive layer, decorative layer, and transparent resin layer may be provided in this order from the side closest to the substrate layer. Furthermore, as described above, when the substrate is a laminate of two or more layers, an adhesive layer may be provided between the layers constituting the substrate.

[0089] The adhesive layer can be made of, for example, an adhesive such as a urethane adhesive, an acrylic adhesive, an epoxy adhesive, a rubber adhesive, etc. Among these adhesives, a urethane adhesive is preferred in terms of adhesive strength. Examples of urethane adhesives include adhesives that utilize two-component curing urethane resins containing various polyol compounds such as polyether polyol, polyester polyol, and acrylic polyol, and a curing agent such as an isocyanate compound.

[0090] The thickness of the adhesive layer is preferably 0.1 μm or more and 30 μm or less, more preferably 1 μm or more and 15 μm or less, and even more preferably 2 μm or more and 10 μm or less.

[0091] The decorative layer, adhesive layer, and primer layer described above can be formed by applying a coating liquid containing a composition for forming each layer by a known method such as gravure printing, bar coating, roll coating, reverse roll coating, or comma coating, and then drying and curing the coating as necessary.

[0092] <Forming processing> The antiviral article may be given a desired uneven shape (also called an uneven pattern) by a shaping treatment such as embossing. When embossing is performed, for example, the antiviral article is heated to preferably from 80°C to 260°C, more preferably from 85°C to 200°C, and even more preferably from 100°C to 180°C, and then an embossing plate is pressed against the antiviral article. The area where the embossing plate is pressed is preferably the cured product layer side of the antiviral article.

[0093] <Application> The antiviral article of the present invention can be used for various purposes, including the following (1) to (12): (1) Surface materials for interior walls, floors, ceilings, etc. of buildings such as houses, offices, stores, hospitals, and clinics. (2) Surface materials for exterior parts such as exterior walls, roofs, eaves ceilings, door pockets, etc. of buildings such as houses, offices, stores, hospitals, and clinics. (3) Surface materials for building fixtures such as windows, window frames, doors, and door frames (interior or exterior parts); surface materials for fixture accessories (handles, etc.); surface materials for building fixture jigs. (4) Surface materials for fixtures such as handrails, waist walls, moldings, thresholds, lintels, and top boards. (5) Surface materials for outdoor (exterior) parts such as fences, gates, drying rack pillars and handrails. (6) Surface materials for furniture such as chests of drawers, desks, chairs, cupboards, kitchen sinks, etc.; surface materials for furniture accessories (handles, etc.); surface materials for furniture fixtures. (7) Surface materials for the housings of various home appliances such as television receivers, radio receivers, refrigerators, microwave ovens, washing machines, electric fans, and air conditioners; surface materials for accessories of home appliances (handles, switches, touch panels, etc.); surface materials for fixtures of home appliances. (8) Surface materials for office automation equipment such as electronic copying machines, facsimiles, printers, personal computers, and other computing equipment; surface materials for the housings of various office automation equipment such as ATM machines at financial institutions such as banks and post offices; surface materials for accessories of various office automation equipment (keyboards, touch panels, etc.); surface materials for jigs of various office automation equipment. (9) Surface materials for the interior or exterior parts (walls, floors, ceilings, handrails, supports, control panels, levers, handles, steering wheels, and other control equipment) of vehicles such as automobiles, railway cars, ships, and aircraft. (10) Partitions in various buildings; shielding plates or curtains to prevent droplet infection of viruses at counters, accounting counters, etc. of stores, offices, government offices, etc.; face protection equipment such as protective masks (face guards) and protective glasses (goggles); or surface materials for these. (11) Business forms such as slips; bankbooks; cards such as cash cards, credit cards, and point cards of financial institutions; or the surface materials of these. (12) Glass, resin, etc. bottles; metal cans; resin soft packaging materials such as resin retort containers; packaging materials such as various tubes; or the surface materials of these.

[0094] [Antiviral resin composition] The antiviral resin composition of the present invention contains a curable resin composition and particles of an imidazole compound.

[0095] The embodiments of the "curable resin composition" and "particles of imidazole-based compound" in the antiviral resin composition of the present invention are the same as the embodiments of the "curable resin composition" and "particles of imidazole-based compound" in the antiviral article of the present invention described above.

[0096] The antiviral resin composition of the present invention may contain an antioxidant, a light stabilizer, an ultraviolet absorber, and the like, as necessary. The embodiments of the "antioxidant," "light stabilizer," and "ultraviolet absorber" in the antiviral resin composition of the present invention are the same as the embodiments of the "antioxidant," "light stabilizer," and "ultraviolet absorber" in the antiviral article of the present invention described above.

[0097] <Solvent> The antiviral resin composition of the present invention preferably contains a solvent. When the antiviral resin composition contains a solvent, the imidazole compound particles can be more likely to float to the surface of the cured material layer when the solvent volatilizes, making it easier to unevenly distribute the imidazole compound particles near the surface of the cured material layer.

[0098] Examples of the solvent include ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone (MIBK), cyclohexanone, etc.), ethers (dioxane, tetrahydrofuran, etc.), aliphatic hydrocarbons (hexane, etc.), alicyclic hydrocarbons (cyclohexane, etc.), aromatic hydrocarbons (toluene, xylene, etc.), halogenated carbons (dichloromethane, dichloroethane, etc.), esters (methyl acetate, ethyl acetate, butyl acetate, etc.), alcohols (isopropanol, butanol, cyclohexanol, etc.), cellosolves (methyl cellosolve, ethyl cellosolve, etc.), glycol ethers (propylene glycol monomethyl ether acetate, etc.), cellosolve acetates, sulfoxides (dimethyl sulfoxide, etc.), amides (dimethylformamide, dimethylacetamide, etc.), and mixtures thereof may also be used. Among these, for example, methyl ethyl ketone and ethyl acetate are preferred from the viewpoint of maintaining the shape of the particles of the imidazole compound.

[0099] The content of the solvent is preferably 10 to 60 mass %, and more preferably 30 to 50 mass %, of the total amount of the antiviral resin composition (ink for the cured product layer). [Example]

[0100] Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples in any way.

[0101] 1. Evaluation The inks for cured product layers (antiviral resin compositions) of the Examples and Comparative Examples, and the antiviral articles of the Examples and Comparative Examples were evaluated as follows. The evaluation atmosphere was a temperature of 23°C ± 5°C and a humidity of 40 to 65% RH.

[0102] 1-1. Discoloration of the ink for the cured layer (antiviral resin composition) In a room shielded from external light, 30 g of the inks for cured material layers (antiviral resin compositions) of the Examples and Comparative Examples were placed in glass bottles (manufactured by AS ONE Corporation, product number: Labolan screw cap bottle, 50 ml) and the lids were closed to prepare samples for evaluation. At this stage, the color of the inks for cured material layers (antiviral resin compositions) in the samples was white, and showed no difference from the color of compositions containing no antiviral agent (compositions obtained by removing the antiviral agent from the inks for cured material layers (antiviral resin compositions) of the Examples and Comparative Examples). The sample was then placed on a desk and left indoors under fluorescent lighting for 24 hours, after which the color of the ink for the cured layer (antiviral resin composition) in the sample was visually evaluated. The brightness of the fluorescent lighting on the desk was set to a range of 500 to 1,000 lux. The results are shown in Table 1.

[0103] 1-2. Discoloration of antiviral products Regarding the antiviral articles of the Examples and Comparative Examples, * a * b * The measurement device used was a spectrophotometer ("Spectrolino" (model number), manufactured by GretagMacbeth). Next, the antiviral articles of the examples and comparative examples were subjected to an accelerated weathering test using a metal halide lamp (MWOM) for 4 cycles (96 hours). The test consisted of repeating a cycle consisting of 20 hours of ultraviolet irradiation under the following irradiation conditions, followed by 4 hours of condensation under the following condensation conditions. * a * b * The values were measured. The color difference (ΔE *ab) were calculated, and the results are shown in Table 2. Color difference (ΔE * ab) are measured values immediately after production *1 , a *1 and b *1 The measured value after the accelerated weathering test is L *2 , a *2 and b *2 Then, it can be calculated using the following formula: ΔE * ab=〔(L *2 -L *1 ) 2 +(a *2 -a *1 ) 2 +(b * 2-a *2 ) 2 〕 1 / 2

[0104] <Test equipment> Product name "Daipla Metal Weather" manufactured by Daipla Wintes Co., Ltd. <Irradiation conditions> Illuminance: 65mW / cm 2 Black panel temperature: 63°C, chamber humidity: 50%RH, time: 20 hours <Condensation conditions> Illuminance: 0mW / cm 2 , Humidity inside the tank: 98%RH, Time: 4 hours

[0105] 2. Preparation of ink for cured layer (antiviral resin composition) and production of antiviral article [Example 1] The following components were mixed and stirred to prepare ink a for the cured product layer (antiviral resin composition a) of Example 1.

[0106] <Ink a for cured layer (antiviral resin composition a)> ·Ionizing radiation curable resin composition 100 parts by mass (Trifunctional urethane acrylate oligomer with a weight-average molecular weight of 4000) Imidazole compound particles 5 parts by mass (Methyl benzimidazol-2-ylcarbamate, average particle size 5.8 μm) UV absorber 2 parts by weight (Hydroxyphenyltriazine, TUNUVIN 479, manufactured by BASF) Extender pigment (irregular silica) 16 parts by weight (Average particle size: 10μm) Solvent 50 parts by weight (Ethyl Acetate)

[0107] Next, a decorative layer ink containing a two-component curing acrylic-urethane resin and a colorant was applied by gravure printing to one side of a substrate (a 60 μm thick titanium oxide-containing polypropylene resin sheet) that had been subjected to corona discharge treatment on both sides, and then dried to form a 3 μm thick wood grain pattern decorative layer. Next, a 3 μm thick adhesive layer made of a urethane resin adhesive was formed on the decorative layer, and then a polypropylene resin was hot-melt extruded onto the adhesive layer using a T-die extruder to form an 80 μm thick transparent resin layer. Next, the surface of the transparent resin layer was subjected to a corona discharge treatment, and then a primer layer ink having the following composition was applied onto the transparent resin layer by gravure printing and dried to form a primer layer having a thickness of 2 μm. Next, the ink a for cured layer (antiviral resin composition a) was applied onto the primer layer by roll coating to form an uncured cured layer, which was then dried at 60°C for 1 minute and then irradiated with an electron beam (acceleration voltage: 175 kV, 5 Mrad (50 kGy)) to crosslink and cure the curable resin composition (ionizing radiation-curable resin composition), forming a cured layer with a thickness of 15 μm, thereby obtaining the antiviral article of Example 1.

[0108] <Ink for primer layer> 100 parts by weight of a mixture of urethane-acrylic copolymer and acrylic polyol Hexamethylene diisocyanate 5 parts by mass

[0109] [Comparative Example 1] Ink b for cured material layer (antiviral resin composition b) of Comparative Example 1 was prepared by removing "5 parts by mass of imidazole compound particles" from ink a for cured material layer (antiviral resin composition a) and adding "3 parts by mass of an antiviral agent obtained by supporting silver ions on glass (product number "PG711" manufactured by Koa Glass Co., Ltd., average particle size 3 μm)" instead.

[0110] Next, an antiviral article of Comparative Example 1 was obtained in the same manner as in Example 1, except that the ink a for cured product layer (antiviral resin composition a) was changed to the ink b for cured product layer (antiviral resin composition b).

[0111] [Table 1]

[0112] As shown in Table 1, it can be confirmed that the inks for cured product layers (antiviral resin compositions) and antiviral articles of the examples can suppress discoloration. [Explanation of symbols]

[0113] 100: Antiviral products 10: Cured material layer 11: Cured product of curable resin composition 12: Imidazole compound particles 20: Base material

Claims

1. An article having a cured material layer, the cured material layer contains a cured material of a curable resin composition and particles of methyl benzimidazol-2-ylcarbamate, wherein D is an average particle size of the methyl benzimidazol-2-ylcarbamate particles and T is a thickness of the cured material layer, and D / T is 0.01 or more and 1.0 or less; An antiviral article in which the cured material layer is substantially free of silver and silver ions (excluding those in which the cured material layer contains an azole derivative other than the methyl benzimidazol-2-ylcarbamate).

2. 2. The antiviral article according to claim 1, comprising 0.5 to 20.0 parts by mass of the methyl benzimidazol-2-ylcarbamate particles per 100 parts by mass of the cured product.

3. The antiviral article according to claim 1 or 2, comprising the cured product layer on a substrate.

4. The antiviral article according to any one of claims 1 to 3, wherein the particles of the methyl benzimidazol-2-ylcarbamate have an average particle size of 0.1 to 10.0 µm.

5. The antiviral article according to any one of claims 1 to 4, wherein the cured layer has a thickness of 1.5 µm or more and 30 µm or less.

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