Anti-fog paints, coatings, and articles

Abstract

To provide a coating material capable of forming an antifogging coating film exhibiting excellent antifogging properties, a coating film formed using the coating material, and an article having the coating film.SOLUTION: The coating material contains (A) 100 pts.mass of an active energy ray-curable resin, (B) 1-150 pts.mass of a polyalkylene glycol sulfonic acid amine salt, and (C) 30-550 pts.mass of chain silica and preferably further contains (D) spherical silica. Preferably, the component (A) has water solubility or has one or more hydroxyl groups in one molecule. More preferably, the coating material further contains (F) a silane compound having a hydrolyzable group.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an anti-fog coating material. More specifically, the present invention relates to a coating material capable of forming an anti-fog coating film, a coating film formed using the coating material, and an article having the coating film. [Background technology]

[0002] Transparent resin substrates such as polycarbonate resin sheets have traditionally been used in goggles, sunglasses, polarized glasses, helmet shields, automobile and motorcycle headlamp covers, and rear lamp covers due to their excellent transparency and light weight. Furthermore, because of their excellent impact resistance and high degree of processing flexibility (e.g., the ease of manufacturing products in any shape), proposals have been made in recent years to use transparent resin substrates as a replacement for glass in building windows and automobile windows. However, these articles often suffer from the problem of fine water droplets forming on the surface during use due to sudden increases in humidity, sudden drops in outside temperature, and large temperature differences between the interior and exterior of the vehicle, causing fogging and impairing visibility. To address this issue, it has been proposed to form an anti-fogging coating on these articles (e.g., Patent Document 1). However, these techniques have drawbacks, such as the anti-fogging properties not being sustained or disappearing when exposed to a high-humidity environment. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-197283 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-203774 [Patent Document 3] Japanese Patent Application Laid-Open No. 2015-168692 [Patent Document 4] Japanese Patent Application Laid-Open No. 2003-253242 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a coating material capable of forming an anti-fogging coating film that exhibits excellent anti-fogging properties, a coating film formed using the coating material, and an article having the coating film. [Means for solving the problem]

[0005] As a result of extensive research, the present inventors have found that the above object can be achieved by using a specific paint.

[0006] That is, the various aspects of the present invention are as follows. [1]. (A) 100 parts by mass of active energy ray-curable resin; (B) 1 to 150 parts by mass of a polyalkylene glycol sulfonic acid amine salt; and (C) chain silica 30~550 parts by mass; Paint containing. [2]. Further, (D) spherical silica is contained, wherein the blending amount of the component (A) active energy ray-curable resin is taken as 100 parts by mass, and the sum of the blending amount of the component (C) chain silica and the blending amount of the component (D) spherical silica is 100 to 550 parts by mass; the ratio of the amount of the spherical silica (component (D)) to the amount of the chain silica (component (C)) (component (D) spherical silica / component (C) chain silica)) is 0.1 to 10; [1] The paint described in paragraph 1. [3]. The coating material according to item [1] or [2], wherein the component (A) active energy ray-curable resin contains a water-soluble active energy ray-curable resin. [4]. The coating material according to any one of items [1] to [3], wherein the component (A) active energy ray-curable resin contains an active energy ray-curable resin having one or more hydroxyl groups in one molecule. [5]. The coating material according to any one of items [1] to [4], further comprising 1 to 50 parts by mass of (F) a silane compound having a hydrolyzable group, relative to 100 parts by mass of the active energy ray-curable resin as component (A). [6]. The coating material according to any one of items [1] to [5], wherein the component (B) polyalkylene glycol sulfonic acid amine salt contains a polyalkylene glycol sulfonic acid amine salt having one or more polymerizable functional groups in one molecule. [7]. A coating film formed using the coating material according to any one of items [1] to [6]. [8]. An article having a coating film formed using the coating material according to any one of items [1] to [6]. [Effects of the Invention]

[0007] The coating material of the present invention can form an anti-fog coating film that exhibits excellent anti-fog properties. A preferred coating material of the present invention can form an anti-fog coating film that exhibits excellent anti-fog properties, and that maintains these properties even in high-humidity environments, and that does not lose its anti-fog properties even when repeatedly exposed to high-humidity and low-humidity environments. Therefore, the coating material of the present invention can be suitably used to form an anti-fog coating film on articles that require visibility, such as goggles, sunglasses, polarized glasses, helmet shields, automobile headlamp covers, motorcycle headlamp covers, automobile rear lamp covers, motorcycle rear lamp covers, transparent resin substrates that replace window glass in buildings, and transparent resin substrates that replace window glass in automobiles. DETAILED DESCRIPTION OF THE INVENTION

[0008] As used herein, the term "resin" is used to include resin mixtures containing two or more resins, as well as resin compositions containing components other than resin. As used herein, the term "film" is used interchangeably with "sheet." As used herein, the terms "film" and "sheet" refer to materials that can be industrially wound into rolls. The term "plate" refers to materials that cannot be industrially wound into rolls. Furthermore, as used herein, laminating one layer and another layer in order includes both directly laminating the layers and laminating the layers with one or more additional layers, such as an anchor coat, interposed between them.

[0009] In this specification, the term "more than or equal to" in relation to a numerical range means a certain number or more than a certain number. For example, 20% or more means 20% or more than 20%. The term "less than or equal to" in relation to a numerical range means a certain number or less than a certain number. For example, 20% or less means 20% or less than 20%. Furthermore, the symbol "to" in relation to a numerical range means a certain number, more than a certain number and less than another certain number, or another certain number. Here, another certain number is a number greater than the certain number. For example, 10 to 90% means 10%, more than 10% and less than 90%, or 90%. Furthermore, the upper and lower limits of a numerical range can be arbitrarily combined, and embodiments incorporating such combinations can be interpreted. For example, from a statement regarding the numerical range of a certain characteristic such as "usually 10% or more, preferably 20% or more. On the other hand, it is usually 40% or less, preferably 30% or less," or "usually 10 to 40%, preferably 20 to 30%," it can be read that the numerical range of the certain characteristic is 10 to 40%, 20 to 30%, 10 to 30%, or 20 to 40% in one embodiment.

[0010] Other than in the examples, or where otherwise specified, all numerical values ​​used in the specification and claims should be understood to be modified by the term "about." Without attempting to limit the application of the doctrine of equivalents to the claims, each numerical value should be construed in light of the number of significant digits and by applying ordinary rounding techniques.

[0011] In this specification, terms specifying shapes or geometric conditions, such as parallel, orthogonal, and perpendicular, are intended to include not only the strict meanings but also substantially the same states.

[0012] 1. Anti-fog paint: The coating material of the present invention contains (A) an active energy ray-curable resin, (B) a polyalkylene glycol sulfonic acid amine salt, and (C) linear silica. The coating material of the present invention preferably contains (A) an active energy ray-curable resin, (B) a polyalkylene glycol sulfonic acid amine salt, (C) linear silica, and (D) spherical silica. Each component will be described below.

[0013] (A) Active energy ray curable resin: The coating material of the present invention contains the above-mentioned component (A), an active energy ray-curable resin. The above-mentioned component (A) functions to polymerize and cure by active energy rays such as ultraviolet rays and electron beams to form a coating film (cured coating film).

[0014] Examples of the component (A) active energy ray-curable resin include compounds having a (meth)acryloyl group, compounds having an allyl group, compounds having a thiol group, compounds having a vinyl ether group, N-substituted (meth)acrylamide compounds, and aromatic vinyl compounds.

[0015] The compound having a (meth)acryloyl group is a compound having one or more acryloyl groups (-CO-CH=CH2) or methacryloyl groups (-CO-C(CH3)=CH2) in one molecule. From the viewpoint of the curability of the coating material, the number of (meth)acryloyl groups in one molecule of the compound having a (meth)acryloyl group may be preferably two or more, more preferably three or more. On the other hand, from the viewpoint of the crack resistance of the coating film, the number may be usually 20 or less, preferably 12 or less, more preferably 8 or less.

[0016] Examples of the compound having a (meth)acryloyl group include (meth)acryloyl group-containing prepolymers or oligomers such as polyurethane (meth)acrylate, polyester (meth)acrylate, polyacrylic (meth)acrylate, epoxy (meth)acrylate, polyalkylene glycol poly(meth)acrylate, and polyether (meth)acrylate; compounds having one (meth)acryloyl group per molecule such as methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, n-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, 2-methoxyethyl (meth)acrylate, hydroxyethyl (meth)acrylate, and hydroxypropyl (meth)acrylate; diethylene glycol di(meth)acrylate, neopentyl glycol Examples of suitable (meth)acrylates include compounds having two (meth)acryloyl groups per molecule, such as di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, polyethylene glycol di(meth)acrylate, 2,2'-bis(4-(meth)acryloyloxypolyethyleneoxyphenyl)propane, and 2,2'-bis(4-(meth)acryloyloxypolypropyleneoxyphenyl)propane; compounds having three (meth)acryloyl groups per molecule, such as trimethylolpropane tri(meth)acrylate and trimethylolethane tri(meth)acrylate; compounds having four (meth)acryloyl groups per molecule, such as pentaerythritol tetra(meth)acrylate; and compounds having six (meth)acryloyl groups per molecule, such as dipentaerythritol hexaacrylate. In this specification, "(meth)acrylate" refers to either acrylate or methacrylate.

[0017] The allyl group-containing compound is a compound having one or more allyl groups (2-propenyl group, -CH2-CH=CH2) in one molecule. From the viewpoint of the curability of the coating, the number of allyl groups contained in one molecule of the allyl group-containing compound may be preferably 2 or more, more preferably 3 or more. On the other hand, from the viewpoint of the crack resistance of the coating film, the number may be usually 20 or less, preferably 12 or less, more preferably 8 or less.

[0018] Examples of the compound having an allyl group include compounds having an allyl ether group (-O-CH2-CH=CH2), such as glycerin diallyl ether, trimethylolpropane diallyl ether, and pentaerythritol triallyl ether; compounds having an allyl ester group (-CO-CH2-CH=CH2), such as diallyl maleate, diallyl adipate, triallyl citrate, and triallyl trimellitate; allyl isocyanurate compounds such as 1,3,5-tri-2-propenyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione; allylamine compounds such as allyldimethylamine, diallylmethylamine, and diallyldimethylammonium nitrate; and allyl glycidyl compounds such as glycerin diallyl monoglycidyl ether, allyl glycidyl phthalate, and allyl glycidyl hexahydrophthalate.

[0019] The thiol group-containing compound is a compound having one or more thiol groups selected from the group consisting of primary thiol groups, secondary thiol groups, and tertiary thiol groups in one molecule. From the viewpoint of the curability of the coating material, the number of thiol groups in one molecule of the thiol group-containing compound may be preferably 2 or more, more preferably 3 or more. On the other hand, from the viewpoint of the crack resistance of the coating film, the number may be usually 20 or less, preferably 12 or less, more preferably 8 or less.

[0020] Examples of the compound having a thiol group include compounds having one primary thiol group in one molecule, such as 3-mercaptopropionic acid, 2-ethylhexyl-3-mercaptopropionate, n-octyl-3-mercaptopropionate, 3-methoxybutyl-3-mercaptopropionate, and stearyl-3-mercaptopropionate; compounds having two primary thiol groups in one molecule, such as tetraethylene glycol bis(3-mercaptopropionate); compounds having three primary thiol groups in one molecule, such as trimethylolpropane tris(3-mercaptopropionate) and tris-((3-mercaptopropionyloxy)-ethyl)-isocyanurate; compounds having four primary thiol groups per molecule, such as dipentaerythritol hexakis(3-mercaptopropionate); compounds having six primary thiol groups per molecule, such as dipentaerythritol hexakis(3-mercaptopropionate); compounds having two secondary thiol groups per molecule, such as 1,4-bis(3-mercaptobutyryloxy)butane; compounds having three secondary thiol groups per molecule, such as 1,3,5-tris(2-(3-sulfanylbutanoyloxy)ethyl)-1,3,5-triazinane-2,4,6-trione and trimethylolpropane tris(3-mercaptobutyrate); and compounds having four secondary thiol groups per molecule, such as pentaerythritol tetrakis(3-mercaptobutyrate).

[0021] The vinyl ether group-containing compound is a compound having one or more vinyl ether groups (-O-CH=CH2) in one molecule. From the viewpoint of the curability of the coating material, the number of vinyl ether groups in one molecule of the vinyl ether group-containing compound may be preferably 2 or more, more preferably 3 or more. On the other hand, from the viewpoint of the crack resistance of the coating film, the number may be usually 20 or less, preferably 12 or less, more preferably 8 or less.

[0022] Examples of the compound having a vinyl ether group include compounds having one vinyl ether group per molecule, such as methyl vinyl ether, ethyl vinyl ether, n-propyl vinyl ether, n-butyl vinyl ether, and 2-ethylhexyl vinyl ether; compounds having two vinyl ether groups per molecule, such as diethylene glycol divinyl ether, dipropylene glycol divinyl ether, triethylene glycol divinyl ether, 1,4-cyclohexanedimethanol divinyl ether, 1,4-butanediol divinyl ether, and 1,6-hexanediol divinyl ether; and compounds having three vinyl ether groups per molecule, such as trimethylolpropane trivinyl ether.

[0023] Examples of the N-substituted (meth)acrylamide compound include (meth)acryloylmorpholine, N,N-diethyl(meth)acrylamide, and N-hydroxyethyl(meth)acrylamide.

[0024] Examples of the aromatic vinyl compound include styrene, α-methylstyrene, and 4-methylstyrene.

[0025] In one embodiment, the component (A) active energy ray-curable resin may contain an active energy ray-curable resin having one or more hydroxyl groups per molecule, from the viewpoint of improving scratch resistance while maintaining the anti-fogging properties of the coating film. In one preferred embodiment, the component (A) active energy ray-curable resin may contain the active energy ray-curable resin having one or more hydroxyl groups per molecule in an amount of preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and most preferably 90 to 100% by mass, where the total of all components of component (A) is 100% by mass.

[0026] The active energy ray-curable resin having one or more hydroxyl groups in one molecule is a compound having one or more hydroxyl groups in one molecule and one or more, preferably two or more, functional groups polymerizable by active energy rays in one molecule, such as an acryloyl group, a methacryloyl group, a thiol group, and a vinyl ether group.

[0027] Examples of the active energy ray-curable resin having one or more hydroxyl groups in one molecule include compounds in which a functional group polymerizable by active energy rays, such as an acryloyl group, a methacryloyl group, a thiol group, or a vinyl ether group, is added to at least one hydroxyl group of a polyol such as 1,4-butanediol, 1,6-hexanediol, glycerin, trimethylolpropane, pentaerythritol, ditrimethylolpropane, or dipentaerythritol, and in which the polymerizable functional group is not added to at least one hydroxyl group (i.e., it remains as a hydroxyl group). Examples of such compounds include compounds having a (meth)acryloyl group, such as trimethylolpropane mono(meth)acrylate, trimethylolpropane di(meth)acrylate, glycerin mono(meth)acrylate, glycerin di(meth)acrylate, pentaerythritol mono(meth)acrylate, pentaerythritol di(meth)acrylate, and pentaerythritol tri(meth)acrylate, as well as compounds having an allyl ether group, such as glycerin diallyl ether, trimethylolpropane diallyl ether, and pentaerythritol triallyl ether.

[0028] Examples of the active energy ray-curable resin having one or more hydroxyl groups in one molecule include hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate, and 2-hydroxy-3-(meth)acryloyloxypropyl (meth)acrylate; glycol mono(meth)acrylates such as dipropylene glycol (meth)acrylate, polyethylene glycol mono(meth)acrylate, and polypropylene glycol mono(meth)acrylate; glycerin (meth)acrylates such as glycerin di(meth)acrylate; modified glycidyl (meth)acrylates such as fatty acid-modified glycidyl (meth)acrylate; phosphorus atom-containing (meth)acrylates such as 2-hydroxyethyl acryloyl phosphate; esters such as 2-(meth)acryloyloxyethyl-2-hydroxypropyl phthalate; (Meth)acrylic acid adducts of ester derivatives; pentaerythritol-based (meth)acrylates such as pentaerythritol tri(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethylene oxide-modified pentaerythritol tri(meth)acrylate, and ethylene oxide-modified dipentaerythritol penta(meth)acrylate; epichlorohydrin-modified 1-4 butanediol di(meth)acrylate, and epichlorohydrin-modified 1-6 hexanediol di(meth)acrylate and epoxy-modified (meth)acrylates ((meth)acrylates modified with a compound having an epoxy group, such as epichlorohydrin) such as epichlorohydrin-modified alkyldiol di(meth)acrylates; and caprolactone-modified (meth)acrylates such as caprolactone-modified 2-hydroxyethyl (meth)acrylate, caprolactone-modified pentaerythritol tri(meth)acrylate, and caprolactone-modified dipentaerythritol penta(meth)acrylate.

[0029] In one embodiment, the component (A) active energy ray-curable resin may preferably contain a water-soluble active energy ray-curable resin from the viewpoint of the anti-fogging properties of the coating film. In one preferred embodiment, the component (A) active energy ray-curable resin may contain the water-soluble active energy ray-curable resin in an amount of preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and most preferably 90 to 100% by mass, where the total of all components of component (A) is 100% by mass. Here, water-soluble means that typically 0.4 g or more, preferably 0.6 g or more, more preferably 0.8 g or more, and even more preferably 1.0 g or more are soluble in 1 g of pure water at a temperature of 20°C.

[0030] Examples of the water-soluble active energy ray-curable resin include an ether compound of a (meth)acrylate having a hydroxyl group, such as 2-hydroxyethyl (meth)acrylate, with a sugar alcohol, such as sorbitol, which has one or more (meth)acryloyl groups in one molecule; and a derivative of the ether compound, which has one or more (meth)acryloyl groups in one molecule.

[0031] In one preferred embodiment, the component (A) active energy ray-curable resin may contain the active energy ray-curable resin having one or more hydroxyl groups per molecule (in this paragraph, paragraph 0032, and paragraph 0033, active energy ray-curable resins having one or more hydroxyl groups per molecule that are water-soluble are classified as water-soluble active energy ray-curable resins and excluded from active energy ray-curable resins having one or more hydroxyl groups per molecule), and the water-soluble active energy ray-curable resin. This can improve the scratch resistance while maintaining the anti-fogging properties of the coating film.

[0032] The amounts of the active energy ray-curable resin having one or more hydroxyl groups per molecule and the water-soluble active energy ray-curable resin are appropriately determined taking into consideration the properties to be imparted to the coating film. When it is desired to further improve the scratch resistance of the coating film, the amount of the active energy ray-curable resin having one or more hydroxyl groups per molecule may be preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and most preferably 80% by mass or more. When it is desired to further improve the anti-fogging properties of the coating film, the amount of the water-soluble active energy ray-curable resin may be preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and most preferably 80% by mass or more. Here, the sum of the amount of the active energy ray-curable resin having one or more hydroxyl groups per molecule and the amount of the water-soluble active energy ray-curable resin is 100% by mass.

[0033] The sum of the amount of the active energy ray-curable resin having one or more hydroxyl groups per molecule and the amount of the water-soluble active energy ray-curable resin in component (A) may be preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and most preferably 90 to 100% by mass, with the total of the components in component (A) being 100% by mass.

[0034] As the component (A), the active energy ray-curable resin, one of these or a mixture of two or more thereof can be used.

[0035] (B) Polyalkylene glycol sulfonic acid amine salt: The coating material of the present invention contains the above-mentioned component (B), a polyalkylene glycol sulfonic acid amine salt. The above-mentioned component (B) functions to impart anti-fogging properties to the coating film. The above-mentioned component (B) is a salt of a polyalkylene glycol sulfonic acid and an amine compound. Here, the polyalkylene glycol sulfonic acid is a compound having a sulfonic acid group at one end of the polyalkylene glycol, usually at one end.

[0036] Examples of the polyalkylene glycol include compounds in which one or more alkylene glycols such as ethylene glycol, propane-1,2-diol, 1,3-propanediol, 1,4-butanediol, and 1,6-hexanediol are polymerized in a polymer of usually 1 to 30 units, preferably 3 to 20 units, and more preferably 5 to 15 units.

[0037] In one preferred embodiment, the polyalkylene glycol sulfonic acid may have a polymerizable functional group. In a typical embodiment, the polymerizable functional group is a functional group having a carbon-carbon double bond. Examples of the polymerizable functional group include allyl groups such as allyl ether groups and allyl ester groups; vinyl groups such as vinyl ether groups; thiol groups; and (meth)acryloyl groups. By using a polyalkylene glycol sulfonic acid having a polymerizable functional group as a raw material for the component (B), the polyalkylene glycol sulfonic acid amine salt, it is possible to suppress bleed-out of the component (B), thereby improving the durability of the anti-fogging properties.

[0038] The amine compound is ammonia, a primary amine, a secondary amine, or a tertiary amine, which is a compound that can accept a proton from the sulfonic acid group of a polyalkylene glycol sulfonic acid to form an amino cation and form a salt with the polyalkylene glycol sulfonic acid.

[0039] Examples of the primary amine include alkyl alcohol amines such as methanolamine, 2-aminoethanol, 3-amino-1-propanol, 4-amino-1-butanol, and 6-amino-1-hexanol; and aminoalkyl acrylates such as 2-aminoethyl (meth)acrylate.

[0040] Examples of the secondary amine include alkylaminoalkyl alcohols such as 2-(methylamino)ethanol, 3-(methylamino)-1-propanol, 3-methylamino-1,2-propanediol, 4-(ethylamino)-1-butanol, and 6-(methylamino)-1-hexanol; and alkylaminoalkyl acrylates such as 2-(methylamino)ethyl (meth)acrylate.

[0041] Examples of the tertiary amine include dialkylaminoalkyl alcohols such as 2-(dimethylamino)ethanol, 3-(dimethylamino)-1-propanol, 3-dimethylamino-1,2-propanediol, 4-(dimethylamino)-1-butanol, 4-(diethylamino)-1-butanol, and 6-(dimethylamino)-1-hexanol; and dialkylaminoalkyl acrylates such as 2-(dimethylamino)ethyl (meth)acrylate and 3-(dimethylamino)propyl (meth)acrylate.

[0042] In one preferred embodiment, the amine compound may have a polymerizable functional group. In a typical embodiment, the polymerizable functional group is a functional group having a carbon-carbon double bond. Examples of the polymerizable functional group include allyl groups such as allyl ether groups and allyl ester groups; vinyl groups such as vinyl ether groups; thiol groups; and (meth)acryloyl groups. By using an amine compound having a polymerizable functional group as a raw material for the component (B), polyalkylene glycol sulfonic acid amine salt, it is possible to suppress bleed-out of the component (B), thereby improving the durability of the anti-fogging properties.

[0043] Among these, from the viewpoints of anti-fogging properties and the bleed-out resistance of the component (B), polyalkylene glycol sulfonic acid amine salt, ammonia, aminoalkyl acrylate, alkylaminoalkyl acrylate, and dialkylaminoalkyl acrylate are preferred as the amine compound, and ammonia and dialkylaminoalkyl acrylate are more preferred.

[0044] In one embodiment, the component (B) polyalkylene glycol sulfonic acid amine salt may be an ammonium salt of a compound having a sulfonic acid group at one end of polyethylene glycol represented by the following general formula (b1):

[0045] RO-(CH2-CH2-O)n-SO3·NH4···(b1)

[0046] Here, R is a hydrocarbon group which may have an oxygen atom or a nitrogen atom, and n is a natural number of usually 1 to 30, preferably 3 to 20, and more preferably 5 to 15.

[0047] In another embodiment, the polyalkylene glycol sulfonate amine salt of component (B) may be a salt of a dimethylamino compound and a compound having a sulfonic acid group at one end of a copolymer of ethylene glycol and 1,4-butanediol, as represented by the following general formula (b2):

[0048] RO-((CH2)4-O)m-(CH2-CH2-O)n-SO3·(CH2)2NH-R' ···(b2)

[0049] Here, R is a hydrocarbon group which may have an oxygen atom or a nitrogen atom. R' is a hydrocarbon group which may have an oxygen atom or a nitrogen atom. n is a natural number of usually 1 to 15, preferably 2 to 10, more preferably 3 to 8. m is a natural number of usually 1 to 15, preferably 1 to 10, more preferably 2 to 7. n+m is a natural number of usually 1 to 30, preferably 3 to 20, more preferably 5 to 15.

[0050] In a preferred embodiment, the component (B) polyalkylene glycol sulfonic acid amine salt may have a polymerizable functional group. The polymerizable functional group may be contained in the polyalkylene glycol sulfonic acid, the amine compound, or both compounds. In a typical embodiment, the polymerizable functional group is a functional group having a carbon-carbon double bond. Examples of the polymerizable functional group include allyl groups such as allyl ether groups and allyl ester groups; vinyl groups such as vinyl ether groups and vinyl ester groups; thiol groups; and (meth)acryloyl groups. Using a component (B) having a polymerizable functional group can suppress bleed-out of the component (B) and thereby improve the durability of the anti-fogging properties.

[0051] From the viewpoint of anti-fogging properties, the component (B) polyalkylene glycol sulfonic acid amine salt may be one in which the amine compound has the polymerizable functional group but the polyalkylene glycol sulfonic acid does not.

[0052] From the viewpoint of abrasion resistance, the component (B) polyalkylene glycol sulfonic acid amine salt may be one in which the polyalkylene glycol sulfonic acid has the polymerizable functional group but the amine compound does not.

[0053] In one preferred embodiment, the component (B) polyalkylene glycol sulfonic acid amine salt is a combination of an amine compound having the polymerizable functional group but not the polyalkylene glycol sulfonic acid, and a polyalkylene glycol sulfonic acid having the polymerizable functional group but not the amine compound. This improves the balance between anti-fogging properties and scratch resistance. In this case, the blending ratio of the two (former / latter, i.e., the amine compound having the polymerizable functional group but not the polyalkylene glycol sulfonic acid / the polyalkylene glycol sulfonic acid having the polymerizable functional group but not the amine compound) may be typically 0.1 / 100 to 100 / 100, preferably 0.5 / 100 to 70 / 100, more preferably 1 / 100 to 50 / 100, and even more preferably 1.5 / 100 to 30 / 100.

[0054] As the component (B), polyalkylene glycol sulfonic acid amine salt, one of these or a mixture of two or more thereof can be used.

[0055] The amount of the polyalkylene glycol sulfonic acid amine salt (component (B)) is determined appropriately from the viewpoints of anti-fogging properties, curability of the coating film, and scratch resistance, taking into account the type of component (B) used. From the viewpoint of anti-fogging properties, the amount of component (B) may be usually 1 part by mass or more, preferably 5 parts by mass or more, more preferably 10 parts by mass or more, and even more preferably 15 parts by mass or more, based on 100 parts by mass of the active energy ray-curable resin (component (A)). From the viewpoint of curability of the coating film and scratch resistance, the amount may be usually 150 parts by mass or less, preferably 120 parts by mass or less, more preferably 90 parts by mass or less, even more preferably 60 parts by mass or less, and most preferably 40 parts by mass or less.

[0056] (C) Chain silica: The coating material of the present invention contains the above-mentioned component (C), chain silica. The above-mentioned component (C), chain silica, is a substance in which several to a dozen primary particles of silica (spherical silica) are bonded in a chain shape. The above-mentioned component (C), chain silica, is a substance capable of hydrating a large number of water molecules, and serves to impart anti-fogging properties to the coating film.

[0057] Without intending to be bound by theory, in order to maintain visibility even when the coating film is exposed to a high humidity environment or when a large amount of water is splashed onto the coating film surface, it is necessary that the coating film surface remains highly hydrophilic even in such cases, so that water can wet and spread and water droplets do not form on the coating film surface.

[0058] The hydrophilic functional groups possessed by the active energy ray-curable resin (A) and the polyalkylene glycol sulfonic acid amine salt (B) are excluded from the interior of the coating film under normal circumstances, and most of them are present on or near the surface of the coating film, enhancing the hydrophilicity of the coating film surface. However, when the coating film is exposed to a high-humidity environment or when a large amount of water is splashed onto the surface of the coating film and the coating film absorbs water, some of the hydrophilic functional groups possessed by the components (A) and (B) migrate into the interior of the coating film and become present in large quantities therein. As a result, the number of hydrophilic functional groups present on or near the surface of the coating film decreases, reducing the hydrophilicity of the coating film surface and ultimately reducing the anti-fogging properties.

[0059] Therefore, in the present invention, this problem is solved by further blending the above-mentioned component (C), chain silica. It is believed that the successful effect of the component (C), chain silica, is that due to its shape, it tends to concentrate on or near the surface of the coating film when the coating film is formed hydrodynamically, and does not migrate into the coating film after it has been formed.

[0060] The bonding mode of the primary particles of the chain silica (component (C)) is not limited except that they are bonded in a chain shape. The bonding mode may be a straight chain, a branched chain, a necklace (ring-bonded like a pearl necklace), or a combination of these bonding modes.

[0061] The average particle size of the primary particles of the chain silica (C) (hereinafter sometimes referred to as "average primary particle size") is appropriately selected from the viewpoint of the transparency and anti-fogging properties of the coating film. From the viewpoint of the transparency of the coating film, the average primary particle size of the chain silica (C) may be usually 50 nm or less, preferably 30 nm or less, and more preferably 20 nm or less. On the other hand, from the viewpoint of the anti-fogging properties of the coating film, it may be preferably 3 nm or more, more preferably 5 nm or more, even more preferably 7 nm or more, and most preferably 10 nm or more.

[0062] In this specification, the average primary particle size of the chain silica (component (C)) is calculated from the chain width observed using a scanning electron microscope. Specifically, 50 locations are randomly selected for observation, the chain widths are determined, and the number average value thereof is calculated.

[0063] The average secondary particle diameter of the chain silica (component (C)) is appropriately selected from the viewpoint of the transparency and anti-fogging properties of the coating film. From the viewpoint of the transparency of the coating film, the average secondary particle diameter of the chain silica (component (C)) may be usually 300 nm or less, preferably 200 nm or less, more preferably 150 nm or less, and even more preferably 100 nm or less. On the other hand, from the viewpoint of the anti-fogging properties of the coating film, it may be preferably 30 nm or more, more preferably 50 nm or more.

[0064] In this specification, the average secondary particle size of the chain silica component (C) is the particle size at which the cumulative total from the smallest particles is 50 mass % in a particle size distribution curve measured by dynamic light scattering.

[0065] As the component (C) chain silica, one of these may be used alone or in combination of two or more.

[0066] The blending amount of the chain silica (component (C)) is determined appropriately from the viewpoint of the transparency and anti-fogging properties of the coating film. From the viewpoint of the anti-fogging properties of the coating film, the blending amount of the chain silica (component (C)) may be usually 30 parts by mass or more, preferably 50 parts by mass or more, and more preferably 70 parts by mass or more, per 100 parts by mass of the active energy ray-curable resin (component (A)). On the other hand, from the viewpoint of the transparency of the coating film, the blending amount may be usually 550 parts by mass or less, preferably 350 parts by mass or less, more preferably 250 parts by mass or less, even more preferably 180 parts by mass or less, and most preferably 140 parts by mass or less.

[0067] (D) Spherical silica: The coating material of the present invention may preferably further contain the above-mentioned component (D), spherical silica. The above-mentioned component (D), spherical silica, is a substance in which primary particles are not bonded together, or exist in groups of at most 2 or 3. The above-mentioned component (D), spherical silica, is a substance capable of hydrating a large number of water molecules, and functions to impart anti-fogging properties to the coating film.

[0068] By using the component (C) chain silica and the component (D) spherical silica in combination as the silica component, the balance of transparency, anti-fogging properties, and scratch resistance of the coating film can be improved.

[0069] The average particle size of the primary particles of the spherical silica (hereinafter sometimes referred to as "average primary particle size") of component (D) is appropriately selected from the viewpoints of the transparency, anti-fogging properties, and scratch resistance of the coating film. The average primary particle size of the spherical silica (component (D)) may be usually 1 to 100 nm, preferably 3 to 50 nm, and more preferably 5 to 30 nm.

[0070] In this specification, the average primary particle size of the spherical silica (component (D)) is calculated from the maximum diameter of the primary particles observed using a scanning electron microscope. Specifically, 50 primary particles are randomly selected, their maximum diameters are determined, and their number average value is calculated.

[0071] As the component (D) spherical silica, one of these or a mixture of two or more thereof can be used.

[0072] In embodiments using the spherical silica component (D), the amount of the component (D) is appropriately determined so that the sum of the amount of the chain silica component (C) and the amount of the spherical silica component (D) falls within the range described below, and so that the ratio of the amount of the spherical silica component (D) to the amount of the chain silica component (C) (amount of the spherical silica component (D) / amount of the chain silica component (C)) falls within the range described below.

[0073] In an embodiment using the spherical silica component (D), the sum of the amount of the chain silica component (C) and the amount of the spherical silica component (D) is appropriately determined from the viewpoint of the transparency and anti-fogging properties of the coating film. From the viewpoint of anti-fogging properties, the sum of the amount of the chain silica component (C) and the amount of the spherical silica component (D) may be preferably 100 parts by mass or more, more preferably 150 parts by mass or more, and even more preferably 200 parts by mass or more, per 100 parts by mass of the active energy ray-curable resin component (A). On the other hand, from the viewpoint of the transparency of the coating film, the sum may be usually 550 parts by mass or less, preferably 400 parts by mass or less, more preferably 350 parts by mass or less, and even more preferably 300 parts by mass or less.

[0074] In embodiments using the spherical silica component (D), the ratio of the amount of the spherical silica component (D) to the amount of the chain silica component (C) (the amount of the spherical silica component (D) / the amount of the chain silica component (C)) is determined appropriately from the viewpoint of the transparency and anti-fogging properties of the coating film. From the viewpoint of the anti-fogging properties of the coating film, the ratio of the amount of the spherical silica component (D) to the amount of the chain silica component (C) is usually 10 or less, preferably 7.0 or less, more preferably 5.0 or less, and even more preferably 3.0 or less. From the viewpoint of the transparency of the coating film, the ratio is preferably 0.1 or more, more preferably 0.4 or more, even more preferably 0.7 or more, and most preferably 1.1 or more.

[0075] (E) Photopolymerization initiator: The coating material of the present invention may preferably further contain (E) a photopolymerization initiator. The component (E) is a compound that generates active species such as radicals upon irradiation with active energy rays. The component (E) generates active species such as radicals, thereby polymerizing and curing the component (A) active energy ray-curable resin.

[0076] Examples of the component (E) photopolymerization initiator include benzophenone-based compounds such as benzophenone, methyl o-benzoylbenzoate, 4-methylbenzophenone, 4,4'-bis(diethylamino)benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3',4,4'-tetra(tert-butylperoxycarbonyl)benzophenone, and 2,4,6-trimethylbenzophenone; benzoin-based compounds such as benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzyl methyl ketal; acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexyl phenyl ketone, and 2-hydroxy-1-{4 Examples of the compound include acetophenone compounds such as -[4-(2-hydroxy-2-methyl-propionyl)-benzyl]phenyl}-2-methyl-propan-1-one, α-hydroxyalkylphenone compounds, and alkylphenone compounds such as acetophenone dimethyl acetal; anthraquinone compounds such as methylanthraquinone, 2-ethylanthraquinone, and 2-amylanthraquinone; thioxanthone compounds such as thioxanthone, 2,4-diethylthioxanthone, and 2,4-diisopropylthioxanthone; acylphosphine oxide compounds; biimidazole compounds; titanocene compounds; oxime ester compounds; oxime phenylacetate compounds; hydroxyketone compounds; triazine compounds; and aminobenzoate compounds.

[0077] Here, the alkylphenone compounds are defined as compounds having an acetophenone skeleton (benzene ring-CO-alkyl group) or a structure derived from the acetophenone skeleton. Among the alkylphenone compounds, compounds that retain the carbonyl group C=O derived from the acetophenone skeleton are the acetophenone compounds. In other words, "acetophenone compounds" are a subordinate concept encompassed by "alkylphenone compounds."

[0078] Of these, the component (E) photopolymerization initiator is preferably an alkylphenone compound, more preferably an acetophenone compound, and even more preferably a hydroxyacetophenone compound (an acetophenone compound having a hydroxy group).

[0079] As the component (E) photopolymerization initiator, one of these can be used alone or a mixture of two or more of them.

[0080] The amount of the component (E) photopolymerization initiator is determined as appropriate from the viewpoint of ensuring the desired effect of component (E) in use, as well as from the viewpoint of the color tone and scratch resistance of the coating film. The amount of component (E) in use, relative to 100 parts by mass of the component (A) active energy ray-curable resin, is usually 0.5 parts by mass or more, preferably 1 part by mass or more, and more preferably 1.5 parts by mass or more, from the viewpoint of ensuring the desired effect of component (E). On the other hand, from the viewpoint of the color tone and scratch resistance of the coating film, the amount is usually 20 parts by mass or less, preferably 15 parts by mass or less, more preferably 12 parts by mass or less, and even more preferably 10 parts by mass or less.

[0081] (F) Silane compound having a hydrolyzable group: The coating material of the present invention may preferably further contain (F) a silane compound having a hydrolyzable group. The component (F) is a silane compound having one or more hydrolyzable groups per molecule. By including the component (F), the curability of the coating material and the scratch resistance of the coating film can be improved.

[0082] Examples of the hydrolyzable group contained in the silane compound having a hydrolyzable group (F) include alkoxy groups such as methoxy, ethoxy, propoxy, and isopropoxy; acyloxy groups such as acetoxy; and halogen groups such as chloro. Of these, the hydrolyzable group contained in the component (F) is preferably an alkoxy group from the viewpoint of controllability of the hydrolysis reaction.

[0083] Examples of the silane compound having a hydrolyzable group (Component (F)) include hydrolyzable organosilicon compounds, (partial) hydrolysates of such compounds, and (partial) condensates thereof. Here, the term "partial) hydrolysate" refers to a partial hydrolyzate, a hydrolyzate, or a mixture of a partial hydrolyzate and a hydrolyzate. Here, the term "partial) condensate" refers to a partial condensate, a condensate, or a mixture of a partial condensate and a condensate.

[0084] The hydrolysis or partial hydrolysis of the hydrolyzable organosilicon compound, etc. can be carried out by a known method. For example, a method for hydrolyzing or partial hydrolyzing the hydrolyzable organosilicon compound, etc., can be exemplified by a method in which a predetermined amount of water, typically about 0.1 to 2 moles per mole of the hydrolyzable group in the hydrolyzable organosilicon compound, etc., is mixed with a mixture of the hydrolyzable organosilicon compound, etc. and an organic solvent such as diacetone alcohol, and then, if desired, a catalyst, for example, an acid or alkali such as hydrochloric acid, phosphoric acid, acetic acid, or formic acid, is added, and the mixture is reacted at a predetermined temperature, typically room temperature (23°C) to about 100°C, with stirring.

[0085] The condensation or partial condensation of the hydrolyzable organosilicon compounds, etc. can be carried out by known methods. Examples of the method for condensing or partial condensing the hydrolyzable organosilicon compounds, etc. include a method in which the hydrolyzable organosilicon compounds, etc. are hydrolyzed or partially hydrolyzed by the above-mentioned method to obtain a (partial) hydrolyzate, and then, if desired, a silanol condensation catalyst, such as a metal chelate compound, an organic acid metal salt, or a metal compound having a hydrolyzable group, is added, and the mixture is reacted with stirring at a predetermined temperature, typically at a temperature of 50°C or higher and below the boiling point of the organic solvent.

[0086] Examples of the hydrolyzable organosilicon compound include alkoxysilane compounds such as alkoxymonosilane compounds, bis(alkoxysilyl)alkyl compounds, and oligomers and prepolymers of one or more of these compounds.

[0087] A silane coupling agent may be used as the component (F) silane compound having a hydrolyzable group. The silane coupling agent is a silane compound having one or more hydrolyzable groups and one or more organic polymerizable functional groups per molecule. By using the silane coupling agent, the organic polymerizable functional group of the silane coupling agent reacts with the component (A) active energy ray-curable resin, and the hydrolyzable group reacts with the component (B) polyalkylene glycol sulfonic acid amine salt, the component (C) linear silica, and the component (D) spherical silica, thereby improving the curability of the coating material and the scratch resistance of the coating film.

[0088] Examples of the hydrolyzable group contained in the silane coupling agent include alkoxy groups such as methoxy and ethoxy; acyloxy groups such as acetoxy; and halogen groups such as chloro. Examples of the organic polymerizable functional group contained in the silane coupling agent include vinyl, epoxy, methacryloxy, acryloxy, amino, mercapto, isocyanate, ureido, and isocyanurate. The silane coupling agent may contain one or more of these hydrolyzable groups and one or more of these organic polymerizable functional groups, each in one or more units per molecule.

[0089] As the component (F), a silane compound having a hydrolyzable group, one of these compounds or a mixture of two or more of them can be used.

[0090] In an embodiment using the component (F) a silane compound having a hydrolyzable group, the amount of the component (F) is determined appropriately from the viewpoint of reliably obtaining the effects of use and from the viewpoint of the anti-fogging properties of the coating film. From the viewpoint of reliably obtaining the effects of use, the amount of the component (F) may be preferably 1 part by mass or more, more preferably 5 parts by mass or more, and more preferably 10 parts by mass or more, per 100 parts by mass of the component (A) active energy ray-curable resin. On the other hand, from the viewpoint of the anti-fogging properties of the coating film, the amount may be preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and even more preferably 30 parts by mass or less.

[0091] (G) Reaction accelerator: In an embodiment in which the coating material of the present invention uses the silane compound having a hydrolyzable group (Component (F)), it may preferably further contain the reaction accelerator (Component (G)). Component (G) functions to accelerate the hydrolysis of Component (F) and ensure the effects of using Component (F) are obtained.

[0092] Examples of the component (G) reaction accelerator include aqueous solutions of acids such as hydrochloric acid, phosphoric acid, acetic acid, and formic acid, as well as alkalis. Of these, an aqueous solution of hydrochloric acid is preferred as the component (G). One or a mixture of two or more of these can be used as the component (G).

[0093] The amount of the reaction accelerator (G) used is determined appropriately taking into consideration the type of the silane compound (F) having a hydrolyzable group and the amount of the silane compound (F) having a hydrolyzable group. For example, when a 0.5 mol / L aqueous hydrochloric acid solution is used as the silane compound (F) having a hydrolyzable group, the amount of the aqueous hydrochloric acid solution used may be typically 20 to 200 parts by mass, preferably 50 to 150 parts by mass, per 100 parts by mass of the silane compound (F) having a hydrolyzable group.

[0094] The coating composition of the present invention may further contain optional components other than the above components (A) to (G), provided that the purpose of the present invention is not adversely affected. Examples of such optional components include antifoaming agents, leveling agents, surfactants, thixotropic agents, antistatic agents, antifouling agents, printability improvers, antioxidants, weather resistance stabilizers, light resistance stabilizers, UV absorbers, heat stabilizers, inorganic particles, organic particles, pigments, and dyes. These optional components may be used alone or in combination with two or more of them. The amount of such optional components added may typically be 10 parts by mass or less, or about 0.01 to 10 parts by mass, per 100 parts by mass of component (A).

[0095] The coating material of the present invention may further contain a solvent from the viewpoint of productivity when forming a wet coating film. The solvent is not particularly limited as long as it does not react with the components (A) to (G) and the other optional components or catalyze (accelerate) the self-reaction (including deterioration reaction) of these components. Examples of the solvent include acetone, methyl ethyl ketone, methyl propyl ketone, methyl isobutyl ketone, diisobutyl ketone, cyclohexanone, diacetone alcohol, methanol, ethanol, 1-propanol, 2-propanol (isopropyl alcohol), 1-butanol, 2-methyl-1-propanol (isobutyl alcohol), 2-butanol, 2-methyl-2-propanol (tert-butyl alcohol), 2-methoxyethanol, 2-ethoxyethanol, 1-methoxy-2-propanol, 2-ethoxyethanol ... Examples of the solvent include propanol, 1-ethoxy-2-propanol, 1,3-butanediol, 1,4-butanediol, 2-ethylhexanol, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, ethylene glycol, propylene glycol, butyl cellosolve, propylene glycol monomethyl ether, methyl acetate, ethyl acetate, n-propyl acetate, 1-methylethyl acetate, n-butyl acetate, 2-methylpropyl acetate, 1-methylpropyl acetate, tert-butyl acetate, and toluene.

[0096] Among these, water-soluble solvents are preferred as the solvent. Here, "water-soluble" means that the solvent can be mixed with pure water at a temperature of 20°C in any ratio (the mixed liquid maintains a uniform appearance). Examples of the water-soluble solvent include acetone, methanol, ethanol, 1-propanol, 2-propanol (isopropyl alcohol), 2-methoxyethanol, 2-ethoxyethanol, 2-methyl-2-propanol, 1,3-butanediol, and 1,4-butanediol.

[0097] As the solvent, one of these or a mixture of two or more thereof can be used.

[0098] The coating material of the present invention can be obtained by mixing and stirring these components.

[0099] 2. Coating: The coating film of the present invention is a coating film formed using the coating material of the present invention. In one embodiment, the coating film of the present invention is formed by applying the coating material of the present invention onto the surface of a film substrate and curing it. In another embodiment, the coating film of the present invention is formed by applying the coating material of the present invention onto the surface of a molded body and curing it.

[0100] An embodiment in which the coating film of the present invention is formed by applying the coating material of the present invention to the surface of a film substrate and curing it will be described below. In this embodiment, the coating material of the present invention is applied to the surface of the film substrate to form a wet coating film, which is pre-dried, and then cured by irradiating with active energy rays, thereby forming the coating film of the present invention.

[0101] The method for applying the coating material of the present invention to the surface of the film substrate is not particularly limited, and known coating methods can be used. From the viewpoint of applying the coating material with good productivity by a roll-to-roll method, preferred coating methods include rod coating, roll coating, gravure coating, reverse coating, kiss reverse coating, and die coating.

[0102] The pre-drying method is not particularly limited, and any known drying method can be used. For example, the pre-drying method can be performed by passing the web through a drying oven usually set at a temperature of about 23 to 150°C, preferably 50 to 130°C, more preferably 70 to 120°C, at a line speed such that the time required for passing from the inlet to the outlet is about 0.5 to 10 minutes, preferably 1 to 5 minutes.

[0103] The irradiation dose of the active energy rays is determined appropriately in consideration of the properties of the coating material, from the viewpoint of ensuring that the irradiation dose is necessary and sufficient to completely cure the coating film. The irradiation dose of the active energy rays is usually 10 to 10,000 mJ / cm. 2Approximately, preferably 200 to 2000 mJ / cm 2 , more preferably 300 to 700 mJ / cm 2 It may be.

[0104] The thickness of the coating film is determined appropriately taking into consideration the antifogging property, scratch resistance, and productivity when forming the coating film. From the viewpoint of antifogging property and scratch resistance, the thickness of the coating film may be usually 0.5 μm or more, preferably 1 μm or more, more preferably 1.5 μm or more, and even more preferably 2 μm or more. On the other hand, from the viewpoint of productivity when forming the coating film, the thickness may be usually 60 μm or less, preferably 30 μm or less, more preferably 20 μm or less, and even more preferably 10 μm or less.

[0105] A case where the above film substrate is one of the constituent materials of the article of the present invention will be described.

[0106] When the film substrate is one of the constituent materials of the article of the present invention, the film substrate is preferably highly transparent and uncolored in order to enhance the transparency of the article and ensure visibility. Examples of such films include transparent resin films such as cellulose ester resins such as triacetyl cellulose; polyester resins such as polyethylene terephthalate; cyclic hydrocarbon resins such as ethylene norbornene copolymers; acrylic resins such as polymethyl methacrylate, polyethyl methacrylate, and vinylcyclohexane-methyl (meth)acrylate copolymers; aromatic polycarbonate resins; poly(meth)acrylimide resins; polyolefin resins such as polypropylene and poly-4-methylpentene-1; polyamide resins; polyarylate resins; polymeric urethane acrylate resins; and polyimide resins. These films include unstretched films, uniaxially stretched films, and biaxially stretched films. These films also include laminate films in which two or more layers of one or more of these types are laminated.

[0107] When the film substrate is one of the constituent materials of the article of the present invention, the thickness of the film substrate is appropriately determined taking into consideration the use of the article. When the film substrate is one of the constituent materials of the article of the present invention, the thickness of the film substrate may be usually 20 μm or more, preferably 50 μm or more, from the viewpoint of handleability. From the viewpoint of the strength of the article, the thickness of the film substrate may be usually 100 μm or more, preferably 150 μm or more. On the other hand, from the viewpoint of reducing the weight of the article, the thickness of the film substrate may be usually 2000 μm or less, preferably 800 μm or less, more preferably 600 μm or less.

[0108] The film substrate may be a glass film or a laminate of a transparent resin film and a glass film. In this case, the thickness of the film substrate is determined appropriately taking into consideration the strength of the glass film and the intended use of the article.

[0109] When the film substrate is one of the constituent materials of the article of the present invention, the surface of the film substrate on which the coating film is to be formed may be subjected to an adhesion-facilitating treatment such as corona discharge treatment or anchor coating formation, in order to improve adhesion between the film substrate and the coating film of the present invention.

[0110] Next, the case where the coating film of the present invention is transferred to another substrate (for example, a film, a sheet, a plate, or a substrate of any shape) and used (i.e., the case where the film substrate does not constitute the article of the present invention) will be described.

[0111] When the coating film of the present invention is used by transferring it to another substrate, the film substrate is not particularly limited and any film substrate can be used. In this case, from the viewpoints of web handling property and economy, the film substrate is preferably a non-stretched film or a biaxially stretched film of a polyester resin such as polyethylene terephthalate, or a non-stretched film or a biaxially stretched film of a polypropylene resin.

[0112] When the coating film of the present invention is used by transferring it to another substrate, the thickness of the film substrate may be usually 20 μm or more, preferably 30 μm or more, from the viewpoint of web handleability, whereas the thickness of the film substrate may be usually 100 μm or less, preferably 75 μm or less, from the viewpoint of economy.

[0113] When the coating film of the present invention is used by transferring it to another substrate, the surface of the film substrate on which the coating film is to be formed may be subjected to an easy peeling treatment.

[0114] Next, an embodiment in which the coating material of the present invention is applied to the surface of a molded body and cured to form a coating film of the present invention will be described. In this embodiment, the coating material of the present invention is applied to the surface of the molded body, usually the surface where the generation of cloudiness due to water droplets should be suppressed, to form a wet coating film, which is pre-dried and then cured by irradiating with active energy rays, thereby forming the coating film of the present invention.

[0115] The above-mentioned molded article will be explained in the section "3. Articles."

[0116] The method for applying the coating material of the present invention to the surface of the molded body is not particularly limited, and any known application method can be used, such as spray coating, dip coating, and air knife coating.

[0117] The pre-drying method is not particularly limited, and any known drying method can be used. For example, the pre-drying method involves drying for about 0.5 to 10 minutes, preferably about 1 to 5 minutes, in a drying oven set at a temperature of usually about 23 to 150°C, preferably about 50 to 130°C, more preferably about 70 to 120°C.

[0118] The irradiation dose of the active energy rays is determined appropriately in consideration of the properties of the coating material, from the viewpoint of ensuring that the irradiation dose is necessary and sufficient to completely cure the coating film. The irradiation dose of the active energy rays is usually 10 to 10,000 mJ / cm. 2 Approximately, preferably 200 to 2000 mJ / cm2 , more preferably 300 to 700 mJ / cm 2 It may be.

[0119] The thickness of the coating film is determined appropriately taking into consideration the antifogging property, scratch resistance, and productivity when forming the coating film. From the viewpoint of antifogging property and scratch resistance, the thickness of the coating film may be usually 0.5 μm or more, preferably 1 μm or more, more preferably 1.5 μm or more, and even more preferably 2 μm or more. On the other hand, from the viewpoint of productivity when forming the coating film, the thickness may be usually 60 μm or less, preferably 30 μm or less, more preferably 20 μm or less, and even more preferably 10 μm or less.

[0120] 3. Goods: The article of the present invention has the coating film of the present invention. In one embodiment, the article of the present invention has the coating film of the present invention, and the coating film forms at least a part of the surface of the article. In one preferred embodiment, the article of the present invention has the coating film of the present invention on a surface where the generation of fogging due to water droplets should be suppressed, and the coating film of the present invention forms the surface of the surface side.

[0121] Examples of methods for producing the article of the present invention include a method in which the coating material of the present invention is used to form a coating film of the present invention on the surface of a film substrate to obtain a laminated film having the coating film of the present invention, and then the laminated film is laminated onto the surface of a molded body; a method in which the coating material of the present invention is used to form a coating film of the present invention on the surface of a film substrate, and then the coating film is transferred onto the surface of a molded body; and a method in which the coating material of the present invention is used to form a coating film of the present invention on the surface of a molded body.

[0122] The method for forming the coating film of the present invention on the surface of a film substrate using the coating material of the present invention has been described above. The method for forming the coating film of the present invention on the surface of a molded article using the coating material of the present invention has been described above.

[0123] The molded article is the base of the article of the present invention and functions to impart a desired shape to the article of the present invention and to impart mechanical properties such as impact resistance, strength, and rigidity. In one typical embodiment, the molded article serves as the base of an article that is particularly required to ensure visibility. In one embodiment, the molded article may have a three-dimensional shape and may be typically made of resin or glass. In another embodiment, the molded article may be a film, sheet, or plate that is typically made of resin or glass.

[0124] Methods for producing molded articles having a three-dimensional shape include, for example, methods for molding a resin sheet using three-dimensional molding methods such as membrane press molding, pressure press molding, vacuum molding, and vacuum pressure molding; methods for molding a thermoplastic resin using methods such as injection molding, blow molding, and extrusion molding; and methods for injecting a curable resin into a mold of a desired shape and curing it.

[0125] A method for three-dimensionally forming a resin sheet will be described.

[0126] The thickness of the resin sheet is not particularly limited, but from the viewpoint of maintaining the strength and rigidity required as a base of an article, it may be usually 0.1 mm or more, preferably 0.2 mm or more, more preferably 0.5 mm or more, even more preferably 0.8 mm or more, and most preferably 1 mm or more. On the other hand, from the viewpoint of meeting the demand for lightweight articles and from the viewpoint of three-dimensional formability, it may be usually 10 mm or less, preferably 6 mm or less, and more preferably 3 mm or less.

[0127] The tensile modulus of the resin sheet is not particularly limited, but is preferably 1500 MPa or more, more preferably 1800 MPa or more, from the viewpoint of maintaining the strength and rigidity required as a base for an article. There is no particular upper limit to the tensile modulus, but since it is a resin sheet, the tensile modulus is typically around 10000 MPa at most. The tensile modulus is measured according to JIS K7127:1999 using a type 1B test piece at a pulling rate of 50 mm / min.

[0128] The glass transition temperature of the resin constituting the resin sheet is not particularly limited, but from the viewpoint of maintaining heat resistance (including both the heat resistance required during the production of a molded article and the heat resistance required during use of the article), it may be preferably 90° C. or higher, more preferably 100° C. or higher, and even more preferably 110° C. or higher. When the resin sheet contains two or more types of resins as constituent resins, it is preferable that the resin having the lowest glass transition temperature among them satisfies the above range.

[0129] From the viewpoint of processability during three-dimensional molding to obtain the molded article, the glass transition temperature of the resin constituting the resin sheet may be preferably 200° C. or lower, more preferably 160° C. or lower, and even more preferably 150° C. or lower. When the resin sheet contains two or more types of resins as constituent resins, it is preferable that the resin with the highest glass transition temperature among them satisfies the above range.

[0130] In this specification, the glass transition temperature is the midpoint glass transition temperature calculated by plotting the glass transition appearing on the curve measured during the final heating process in a temperature program using a differential scanning calorimeter, in which a sample is heated to 200°C at a heating rate of 50°C / min, held at 200°C for 10 minutes, cooled to 50°C at a heating rate of 20°C / min, held at 50°C for 10 minutes, and then heated to 200°C at a heating rate of 20°C / min, according to Figure 2 of ASTM D3418. As the differential scanning calorimeter, for example, a Diamond DSC type differential scanning calorimeter manufactured by PerkinElmer Japan Co., Ltd. can be used.

[0131] The resin sheet is preferably a transparent resin sheet from the viewpoint of ensuring visibility. Examples of the transparent resin sheet include cellulose ester resins such as triacetyl cellulose; polyester resins such as polyethylene terephthalate; cyclic hydrocarbon resins such as ethylene norbornene copolymers; acrylic resins such as polymethyl methacrylate, polyethyl methacrylate, and vinylcyclohexane-methyl (meth)acrylate copolymers; aromatic polycarbonate resins; poly(meth)acrylimide resins; polyolefin resins such as polypropylene and poly-4-methylpentene-1; polyamide resins; polyarylate resins; polymeric urethane acrylate resins; and polyimide resins. These sheets include unstretched sheets, uniaxially stretched sheets, and biaxially stretched sheets. These sheets also include laminated sheets in which two or more layers of one or more of these materials are laminated.

[0132] A method for producing a molded article having a three-dimensional shape by vacuum molding using the above resin sheet will be described.

[0133] FIG. 1 shows a plan view (FIG. 1(a)) and a side view (FIG. 1(b)) of an example of a molded body having a three-dimensional shape produced by vacuum forming. FIG. 2 is a conceptual diagram illustrating the vacuum forming method. The following description will be based on FIG. 2. First, a resin sheet 6 is heated and softened using an infrared heater 7 (FIG. 2(a)). Next, the softened resin sheet 6 is removed from the infrared heater 7 and quickly placed on a forming mold 8 (FIG. 2(b)). Next, the space 9 between the resin sheet 6 and the forming mold 8 is depressurized, and the resin sheet 6 is tightly attached to the forming mold 8 to obtain a molded body 10 (FIG. 2(c)). The pressure in the space 9 is preferably 10 KPa or less, more preferably 1 KPa or less, from the viewpoint of ensuring sufficient adhesion between the resin sheet 6 and the forming mold 8 without leaving any air between them. From the viewpoint of achieving tight adhesion, a smaller pressure in the space 9 is preferable because it increases the adhesion force. On the other hand, in consideration of the fact that costs increase exponentially in order to reduce the pressure in the space 9 and the mechanical strength of the resin sheet 6, the lower limit of the pressure in the space 9 is practically 10 -5It may be about KPa.

[0134] Methods for molding thermoplastic resins by injection molding, blow molding, extrusion molding, and the like will be described.

[0135] The method for injection molding a thermoplastic resin is not particularly limited, and known methods can be used. In this specification, the above-mentioned injection molding also includes insert molding. The resin sheet to be inserted into the molding die can be any of the above-mentioned methods. The method for blow molding a thermoplastic resin is not particularly limited, and known methods can be used. The method for extrusion molding a thermoplastic resin is not particularly limited, and known methods can be used. Among these, injection molding is preferred from the viewpoint of freedom in shape.

[0136] The thermoplastic resin used in injection molding, blow molding, or extrusion molding is preferably a thermoplastic resin with excellent transparency in order to ensure visibility. Examples of such thermoplastic resins include cellulose ester resins such as triacetyl cellulose, polyester resins such as polyethylene terephthalate, cyclic hydrocarbon resins such as ethylene norbornene copolymers, acrylic resins such as polymethyl methacrylate, polyethyl methacrylate, and vinylcyclohexane-methyl (meth)acrylate copolymers, aromatic polycarbonate resins, poly(meth)acrylimide resins, polyolefin resins such as polypropylene and poly-4-methylpentene-1, polyamide resins, polyarylate resins, polymeric urethane acrylate resins, and polyimide resins.

[0137] A method of injecting a curable resin into a mold of a desired shape and curing it will be described.

[0138] The curable resin for forming the molded body is a resin that can be cured by heat or by irradiation with active energy rays. The curable resin is not particularly limited, and any curable resin can be used.

[0139] Examples of the curable resin include a resin having two or more polymerizable functional groups in one molecule, and a resin composition of the resin and a curing agent. Examples of the polymerizable functional group include an amino group, a vinyl group, an epoxy group, a methacryloxy group, an acryloxy group, an isocyanate group, an alkoxy group, an acyloxy group, and a halogen group. Examples of the curing agent include an isocyanate curing agent (a compound having two or more isocyanate groups (-N=C=O) in one molecule), a photopolymerization initiator, and an organic peroxide.

[0140] The curable resin is preferably a curable resin having excellent transparency from the viewpoint of ensuring visibility. Examples of such a curable resin include an acrylic curable resin and a polyester curable resin.

[0141] As the curable resin, one of these or a mixture of two or more thereof can be used.

[0142] Examples of the article of the present invention include goggles, sunglasses, polarized glasses, helmet shields, automobile headlamp covers, motorcycle headlamp covers, automobile rear lamp covers, motorcycle rear lamp covers, window glass for buildings, transparent resin substrates that replace the window glass, automobile window glass, and transparent resin substrates that replace the window glass.

[0143] 3 is a conceptual cross-sectional view showing an example of a laminate (a transparent resin substrate that replaces automobile window glass) having a coating film formed using the anti-fog coating material of the present invention. In actual use, the laminate has, from the exterior surface of the automobile, a hard coat 11 with excellent weather resistance, an anchor coat 12, a transparent resin sheet layer 13, a coating film 14 with infrared shielding properties, and an anti-fog coating film 15 formed using the anti-fog coating material of the present invention, which forms the interior surface of the automobile in actual use. [Example]

[0144] The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

[0145] Measurement method (a) Anti-fogging property 1 (initial anti-fogging property): 3 L of distilled water was placed in a cylindrical container (inner diameter 240 mm, height 120 mm), the mouth of the container was covered with an acrylic plate with a 5 cm x 5 cm window, and the distilled water was heated to 50 ° C in a hot water bath. After that, a test piece (10 cm in the machine direction x 10 cm in the horizontal direction) taken from the anti-fog film was placed so as to cover the window of the acrylic plate and with the anti-fog coating film side of the test piece facing the acrylic plate. After 1 minute, the part of the test piece that covered the window of the acrylic plate and the water surface of the distilled water in the container from that part were visually observed, and the evaluation was based on the following criteria. A: There was no noticeable difference in the transparency of the test piece before the test and when visually observed. Therefore, it was determined that no cloudiness occurred on the test piece. B: The transparency of the test piece was slightly decreased when visually observed compared to before the test. Therefore, it was determined that slight cloudiness had occurred on the test piece. C: The transparency of the test piece was found to have decreased when visually observed compared to before the test, and the test piece was found to have become cloudy. However, the cloudiness of the test piece was such that the surface of the distilled water in the container could be seen. D: The transparency of the test piece was significantly reduced when visually observed compared to before the test, and it was found that the test piece had become heavily cloudy. Furthermore, it was no longer possible to see the surface of the distilled water in the container.

[0146] (b) Anti-fogging property 2 (durability of anti-fogging property): The test was carried out in the same manner as in Test (A) Antifogging Property 1 above, except that the test piece was immersed in distilled water at 24°C for 10 minutes beforehand and then immediately used for the test, and evaluated according to the same criteria.

[0147] The above-mentioned test (ii) Anti-fogging property 2 is a test conducted after immersion in distilled water to make the coating film absorb water, and is therefore considered to be an indicator of whether sufficient anti-fogging properties are maintained even in a high humidity environment.

[0148] (C) Anti-fogging property 3 (anti-fogging property after drying 1): The test specimens were immersed in distilled water at 24°C for 10 minutes, then dried for 30 minutes in an environment of 24°C and 30% relative humidity, and then immediately used in the test. Except for this, the test was carried out in the same manner as in Test (a) Anti-fogging Property 1 and evaluated according to the same criteria.

[0149] (d) Anti-fogging property 4 (anti-fogging property after drying 2): The test specimen was immersed in distilled water at 24°C for 10 minutes, then dried for 30 minutes in an environment of 24°C and 30% relative humidity, and then immediately used in the test. The test specimen was visually observed 5 seconds after being placed on the acrylic plate. The test was carried out in the same manner as in Test (a) Anti-fogging Property 1, and evaluated using the same criteria.

[0150] The above-mentioned test (c) Anti-fogging property 3 and the above-mentioned test (d) Anti-fogging property 4 are tests conducted by immersing the coating film in distilled water to make it absorbent, and then drying the coating film, and are therefore considered to be indicators of whether sufficient anti-fogging properties will be maintained even when the coating film is repeatedly exposed to high humidity and low humidity environments.

[0151] (H) Haze: According to JIS K7136:2000, the haze (unit: %) was measured using a turbidity meter "NDH4000 (trade name)" manufactured by Nippon Denshoku Industries Co., Ltd., under the condition that light was incident from the coating surface side of the anti-fog film.

[0152] The haze of the anti-fog film may be preferably 10% or less, more preferably 6% or less, even more preferably 4% or less, still more preferably 3% or less, and most preferably 2% or less, depending on the application.

[0153] (f) Cross-cut test (paint adhesion): According to JIS K5600-5-6:1999, 100 grid cuts (1 square = 1 mm x 1 mm) were made on the coating side of the anti-fog film, and then adhesion test tape was attached to the grid, squeezed with a finger, and then peeled off. The evaluation criteria were in accordance with Table 1 of the above JIS standard. Category 0: The edges of the cut are completely smooth and there are no peeling marks on any of the grids. Category 1: Small peeling of the coating at the intersection of the cuts. The cross-cut area affected does not appreciably exceed 5%. Category 2: The coating is peeling along the edges of the cuts and / or at the intersections. The cross-cut area is clearly more than 5% but not more than 15% affected. Category 3: The coating has partially or completely peeled off significantly along the edges of the cuts and / or partially or completely peeled off in various areas of the mesh. The cross-cut area is clearly more than 15% affected but not more than 35%. Category 4: The coating has partially or completely peeled off significantly along the edges of the cuts and / or partially or completely peeled off in several sections. The cross-cut area is clearly more than 35% affected but not more than 65%. Category 5: When the degree of peeling exceeds Category 4.

[0154] (g) Scratch resistance: A test specimen measuring 240mm long and 25mm wide, with the machine direction aligned longitudinally, was placed in a crockmeter-type friction tester (Type 1) conforming to JIS L0849:2013, with the anti-fog film coating facing outward. The friction terminal of the tester was covered with four layers of gauze (Kawamoto Sangyo Co., Ltd. medical type 1 gauze) and placed in contact with the test specimen. A 200g load was applied, and the coating surface of the test specimen was rubbed back and forth 50 times at a travel distance of 120mm and a speed of 0.5 strokes / second. The rubbed area of ​​the test specimen was then visually inspected 50cm away from the fluorescent lamp to determine whether scratches were present. If no scratches were found, the same area of ​​the test specimen was rubbed again, and the visual inspection was repeated. The number of additional passes was increased to 50, 100, 300, 500, and 1000 times. Evaluation was made according to the following criteria. A: No scratches were observed even after 2000 round trips. B: Scratches were not observed after 1000 reciprocating movements, but were observed after 2000 reciprocating movements. C: Scratches were not observed after 500 reciprocating movements, but were observed after 1000 reciprocating movements. D: Scratches were not observed after 200 round trips, but were observed after 500 round trips. E: Scratches were not observed after 100 round trips, but were observed after 200 round trips. F: Scratches were not observed after 50 round trips, but were observed after 100 round trips. G: The wound was observed after 50 round trips.

[0155] Raw materials used (A) Active energy ray curable resin: (A-1) Toagosei Co., Ltd.'s sorbitol acrylate "Aronix M-926 (trade name)." It has two acryloyl groups per molecule. More than 1 g of it was easily dissolved in 1 g of pure water at 20°C (it was assumed that it could be dissolved in water at any ratio). (A-2) Glycerin diacrylate "Aronix M-920 (trade name)" manufactured by Toa Gosei Co., Ltd. (A-3) Osaka Soda Co., Ltd.'s pentaerythritol triallyl ether "Neoallyl P-30 (trade name)." (A-4) Pentaerythritol tetrakis(3-mercaptopropionate) "PEMP (trade name)" from SC Organic Chemical Co., Ltd.

[0156] (B) Polyalkylene glycol sulfonic acid amine salt: (B-1) AQUALON KH05 (trade name), a compound having a sulfonic acid group at one end of polyethylene glycol and an ammonium salt of a compound having an allyl ether group, manufactured by Daiichi Kogyo Seiyaku Co., Ltd. (B-2) AQUALON KH10 (trade name), a compound having a sulfonic acid group at one end of polyethylene glycol and an ammonium salt of a compound having an allyl ether group, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.

[0157] The above component (B-1) and the above component (B-2) are compounds having the following general formula (b3).

[0158] CH2=CH-CH2-O-CH2-CHR-O-((CH2)2-O)n-SO3·NH4 ···(b3)

[0159] Here, R is a hydrocarbon group which may have an oxygen atom or a nitrogen atom, and n is a natural number of 1 to 30.

[0160] (B-3) "Aminoion RE3000MF (trade name)," a diluted solution of a salt of a compound having a sulfonic acid group at one end of a copolymer of ethylene glycol and 1,4-butanediol and 2-(dimethylamino)ethyl acrylate (compound of the following formula (b4)), manufactured by Nippon Nyukazai Co., Ltd. Solid content (salt content): 50% by mass.

[0161] C 13 H 27 -O-((CH2)4-O)3-((CH2)2-O)5-SO3·(CH3)2NH-(CH2)2-OCOCH=CH2···(b4)

[0162] (C) Chain silica: (C-1) Nissan Chemical Co., Ltd. Linear chain silica propylene glycol monomethyl ether dispersion "PGM-ST-UP (trade name)". Average primary particle size: 12 nm, average secondary particle size: 70 nm, solid content (chain silica content): 20 mass%. (C-2) Nissan Chemical Co., Ltd. necklace-shaped chain silica dispersion "ST-PS-SO (trade name)". Average primary particle size: 15 nm, average secondary particle size: 88 nm, solid content (chain silica content): 20 mass%.

[0163] (D) Spherical silica: (D-1) Nissan Chemical Co., Ltd. spherical silica propylene glycol monomethyl ether dispersion "PGM-ST (trade name)". Average primary particle diameter 13 nm, solid content (spherical silica content) 30 mass%. (D-2) Nissan Chemical Co., Ltd. spherical silica isopropyl alcohol dispersion "IPA-ST-L (trade name)". Average primary particle diameter 45 nm, solid content (spherical silica content) 30 mass%.

[0164] (E) Photopolymerization initiator: (E-1) Hydroxyacetophenone-based photopolymerization initiator (2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]phenyl}-2-methyl-propan-1-one) "Omnirad 127 (trade name)" from IGM Resins.

[0165] (F) Silane compound having a hydrolyzable group: (F-1) "X-12-1050 (trade name)," a polymeric silane coupling agent having two or more trimethoxysilyl groups and two or more acryloyl groups, manufactured by Shin-Etsu Chemical Co., Ltd. (F-2) Colcoat's silicate oligomer "Methyl Silicate 51 (trade name)".

[0166] (G) Reaction accelerator: (G-1) Aqueous hydrochloric acid solution with a concentration of 0.5 mol / L.

[0167] (H) Other ingredients: (H-1) Neos Corporation's leveling agent, diluted with ethyl acetate, "Ftergent 602A (trade name)." Solid content (leveling agent content) 50% by mass.

[0168] (P) Film substrate: (P-1) Toray Industries, Inc.'s 50 μm thick, double-sided, easily adhesive, biaxially oriented polyethylene terephthalate resin film "Lumirror (product name)."

[0169] (Q) Anti-fog paint: (Q-1) 100 parts by mass of the above component (A-1), 25 parts by mass of the above component (B-1), 4 parts by mass of the above component (B-3) (2 parts by mass in solids), 525 parts by mass of the above component (C-1) (105 parts by mass in solids), 567 parts by mass of the above component (D-1) (170 parts by mass in solids), 5.6 parts by mass of the above component (E-1), 14 parts by mass of the above component (F-1), 19 parts by mass of the above component (G-1), 1.4 parts by mass of the above component (H-1) (0.7 parts by mass in solids), and 635 parts by mass of methanol were mixed and stirred to obtain an anti-fog coating (Q-1). Note that the table shows values ​​calculated as solids, excluding the above component (G) reaction accelerator and solvent.

[0170] (Q‐2)~(Q‐29): Anti-fog coatings (Q-2) to (Q-29) were obtained in the same manner as the above anti-fog coating (Q-1), except that the formulation was changed as shown in any one of Tables 1 to 3.

[0171] Example 1 Using the above anti-fog coating material (Q-1), a wet coating film was formed on one side of the above film substrate (P-1) using a film Mayer bar type coating device so that the thickness after curing would be 5 μm. After pre-drying in a drying oven, the film was cured by irradiating with ultraviolet light to form an anti-fog coating film, and an anti-fog film having an anti-fog coating film on one side of the film substrate was obtained. The above tests (A) to (G) were performed. The results are shown in Table 1.

[0172] Examples 2-29 Anti-fog films were obtained in the same manner as in Example 1, except that the anti-fog coating material shown in Table 1 or 2 was used. The above tests (a) to (g) were carried out. The results are shown in any one of Tables 1 to 3.

[0173] [Table 1]

[0174] [Table 2]

[0175] [Table 3]

[0176] It was found that coating films formed using the coating material of the present invention exhibit excellent anti-fogging properties. It was found that coating films formed using preferred coating materials of the present invention exhibit anti-fogging properties that ensure sufficient visibility even in high-humidity environments, and that these properties are sustained. It was also found that coating films formed using more preferred coating materials of the present invention are excellent in transparency, scratch resistance, and adhesion to transparent resin substrates. Furthermore, based on the surface condition of the coating film after immersion in distilled water in the above-mentioned Test (ii) Anti-fogging 2, it was determined that the dimensional stability was at a sufficient level even after water absorption. [Brief explanation of the drawings]

[0177] [Figure 1] 1A and 1B are a plan view and a side view showing an example of a molded body having a three-dimensional shape produced by a vacuum molding method. [Figure 2] FIG. 1 is a conceptual diagram illustrating a vacuum forming method. [Figure 3] 1 is a conceptual diagram of a cross section showing an example of a laminate having a coating film formed using the anti-fog coating material of the present invention. [Explanation of symbols]

[0178] 1: The length of the major axis of the zenith flat part of the elliptical molded body 2: Length of the major axis of the end of an elliptical molded body 3: Minor axis length of the zenith flat part of the elliptical molded body 4: Minor axis length of the end of an elliptical molded body 5: Height from the edge of the molding to the top 6: Resin sheet 7: Infrared heater 8: Molding mold 9: Space between the resin sheet 6 and the molding die 8 10: Molded body 11: Hard coating with excellent weather resistance 12: Anchor Coat 13: Transparent resin sheet layer 14: Coating with infrared shielding function 15: Anti-fog coating film formed using the anti-fog coating material of the present invention

Claims

1. (A) 100 parts by mass of active energy ray-curable resin; (B) 1 to 150 parts by mass of a polyalkylene glycol sulfonic acid amine salt; and (C) chain silica 50 to 550 parts by mass; wherein the component (B) polyalkylene glycol sulfonic acid amine salt comprises a salt of polyalkylene glycol sulfonic acid and an amine compound having a polymerizable functional group. paint.

2. 2. The paint according to claim 1, wherein the amount of component (C) chain silica blended is 70 to 550 parts by mass.

3. Further, (D) spherical silica is contained, wherein the blending amount of the component (A) active energy ray-curable resin is taken as 100 parts by mass, and the sum of the blending amount of the component (C) chain silica and the blending amount of the component (D) spherical silica is 100 to 550 parts by mass; the ratio of the amount of the spherical silica (component (D)) to the amount of the chain silica (component (C)) is 0.1 to 10; The paint according to claim 1 or 2.

4. The coating material according to any one of claims 1 to 3, wherein the component (A) active energy ray-curable resin comprises a water-soluble active energy ray-curable resin.

5. The coating material according to any one of claims 1 to 4, wherein the component (A) active energy ray-curable resin comprises an active energy ray-curable resin having one or more hydroxyl groups in one molecule.

6. The coating material according to any one of claims 1 to 5, further comprising (F) a silane compound having a hydrolyzable group in an amount of 1 to 50 parts by mass per 100 parts by mass of the active energy ray-curable resin of component (A).

7. The coating material according to any one of claims 1 to 6, wherein the component (B) polyalkylene glycol sulfonic acid amine salt further comprises a salt of a polyalkylene glycol sulfonic acid having a polymerizable functional group and an amine compound.

8. A coating film formed using the coating material according to any one of claims 1 to 7.

9. An article having a coating film formed using the coating material according to any one of claims 1 to 7.

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