Antifogging agent composition, antifogging sheets, antifogging methods for hard surfaces, uses of the composition, and uses of the sheets.

Abstract

The object of this invention is to provide an anti-fogging agent composition that imparts excellent anti-fogging properties to hard surfaces such as eyeglass lenses and can be uniformly coated. This invention relates to an anti-fogging agent composition containing a fluorinated surfactant and a glycol ether, wherein the content of the aforementioned glycol ether is less than 10% by weight.

Description

Technical Field

[0001] Invention Field This invention relates to an anti-fogging agent composition that imparts excellent anti-fogging properties to hard surfaces such as eyeglass lenses and can be uniformly coated. Prior Technology

[0002] Background of the Invention When plastic or glass products experience changes in temperature or humidity, moisture in the air can condense into tiny water droplets that adhere to the surface, causing fogging. Fogging of transparent materials such as eyeglass lenses and sunglasses not only causes inconvenience in daily life but can also pose dangers depending on the situation. Therefore, various research and development efforts have been undertaken to develop anti-fogging agents that impart anti-fogging properties to hard surfaces.

[0003] For example, Patent Document 1 discloses an anti-fogging agent for eyeglass lenses, which is made by dissolving 1.0-3.0% by weight of a nonionic fluorinated surfactant, 1.0-3.0% by weight of a cationic fluorinated surfactant, and 0.02-0.5% by weight of a perfluoroalkyl polysiloxane compound in a mixture of water and a lower alcohol. Patent Document 2 discloses an anti-fogging agent containing: a fluorinated amphoteric surfactant or a fluorinated anionic surfactant; and a fluorinated nonionic surfactant. Patent Document 3 discloses an anti-fogging agent containing a fluorinated amphoteric surfactant, a fluorinated anionic surfactant or a fluorinated cationic surfactant, and a non-fluorinated amphoteric surfactant.

[0004] While some conventionally known antifogging agents exhibit excellent antifogging effects, the development of new antifogging agents is anticipated due to the diversification of formulations. Prior technology documents Patent documents

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-20411 [Patent Document 2] Japanese Patent Application Publication No. 2016-60878 [Patent Document 3] Japanese Patent Application Publication No. 2016-60879 Summary of the Invention

[0006] Invention Summary The problem the invention aims to solve The purpose of this invention is to provide an anti-fogging agent composition that can impart excellent anti-fogging properties to hard surfaces such as eyeglass lenses and can be uniformly coated. The means to solve the problem

[0007] In order to solve the aforementioned problems, the inventors conducted in-depth research and discovered an anti-fogging agent composition containing a fluorinated surfactant and a glycol ether, wherein the glycol ether content is less than 10% by weight. This composition imparts excellent anti-fogging properties to hard surfaces such as eyeglass lenses and can be uniformly coated onto such hard surfaces. The present invention was completed based on these insights and further repeated research.

[0008] That is, the present invention provides the invention as disclosed below. Item 1. An antifogging agent composition comprising a fluorinated surfactant and a glycol ether, and The content of the aforementioned glycol ether is less than 10% by weight. Item 2. The antifogging agent composition of Item 1, wherein the aforementioned glycol ether is selected from at least one of the group consisting of monoalkyl glycol monoalkyl ethers, esters of monoalkyl glycol monoalkyl ethers, polyalkyl glycol monoalkyl ethers, monoalkyl glycol monoaryl ethers, and polyalkyl glycol dialkyl ethers. Item 3. The antifogging agent composition as described in Item 1 or Item 2, wherein the content of the aforementioned fluorinated surfactant is 0.1 to 20% by weight. Item 4. The antifogging agent composition of any of Items 1 to 3 further contains a monovalent lower alcohol. Item 5. The antifogging agent composition as described in Item 4, wherein the aforementioned monovalent lower alcohol is isopropanol and / or ethanol. Item 6. The antifogging agent composition of any one of Items 1 to 5 has a surface tension of less than 30.0 mN / m at 25°C. Item 7. An antifog agent composition as described in any of Items 1 to 6, which is used in eyeglass lenses. Item 8. An anti-fogging sheet comprising an anti-fogging agent composition as described in any one of items 1 to 7, and a substrate sheet, wherein the anti-fogging agent composition is impregnated in the substrate sheet. Item 9. The anti-fog sheet material as described in Item 8 is used in eyeglass lenses. Item 10. A method for preventing fogging on a hard surface, comprising applying an antifogging agent composition as described in any one of Items 1 to 5 to the hard surface. Item 11. The anti-fog method for a hard surface as described in Item 10, wherein the aforementioned hard surface is the surface of an eyeglass lens. Item 12. Use of a composition for imparting anti-fogging properties to a hard surface, wherein the composition contains a fluorinated surfactant and a glycol ether, and the glycol ether content is less than 10% by weight. Item 13. Use of a sheet material for imparting anti-fogging properties to a rigid surface, the sheet material comprising a composition and a substrate sheet, wherein the anti-fogging composition is impregnated in the substrate sheet; the composition contains a fluorinated surfactant and a glycol ether, wherein the glycol ether content is less than 10% by weight. Invention Effects

[0009] According to the present invention, an anti-fogging agent composition can be provided that imparts excellent anti-fogging properties to hard surfaces such as eyeglass lenses and can be uniformly coated. Simple Explanation of the Diagram

[0010] Figure 1 shows photographs of the lens appearance that meet the various criteria for judging anti-fog effect. Implementation

[0011] Forms used to implement inventions 1. Antifogging agent composition The antifogging agent composition of this invention is characterized by containing a fluorinated surfactant and a glycol ether, wherein the glycol ether content is less than 10% by weight. The antifogging agent composition of this invention will be described in detail below.

[0012] Fluorine-based surfactants The antifogging agent of this invention contains a fluorinated surfactant. Fluorinated surfactants are surfactants whose molecules contain fluoroalkyl or fluoroolefin groups.

[0013] The type of fluoroalkyl or fluoroalkenyl group in the fluorinated surfactants used in this invention is not particularly limited. Examples include perfluoroalkyl, polyfluoroalkyl with a portion of hydrogen atoms replaced by fluorine atoms, perfluoroalkenyl, and polyfluoroalkenyl with a portion of hydrogen atoms replaced by fluorine atoms. Perfluoroalkyl, polyfluoroalkyl with a portion of hydrogen atoms replaced by fluorine atoms, and perfluoroalkenyl are preferred. The fluoroalkyl or fluoroalkenyl group in the fluorinated surfactants can be either linear or branched. The number of carbon atoms in the fluoroalkyl or fluoroalkenyl group in the fluorinated surfactants is not particularly limited, and examples include 3 to 20, preferably 3 to 10.

[0014] There is no particular limitation on the fluorinated surfactants used in this invention; they can be any of fluorinated nonionic surfactants, fluorinated cationic surfactants, fluorinated anionic surfactants, and fluorinated amphoteric surfactants.

[0015] Examples of fluorinated nonionic surfactants include fluoroalkyl ethylene oxide adducts, fluoroalkyl amine oxides, oligomers having fluoroalkyl groups and hydrophilic and / or lipophilic groups, fluoroalkenyl ethylene oxide adducts, fluoroalkenyl amine oxides, and oligomers having fluoroalkenyl groups and hydrophilic and / or lipophilic groups. Among these fluorinated nonionic surfactants, fluoroalkyl ethylene oxide adducts and fluoroalkenyl ethylene oxide adducts are preferred, and polyfluoroalkyl ethylene oxide adducts and perfluoroalkenyl ethylene oxide adducts are even more preferred.

[0016] Specifically, examples of fluorinated cationic surfactants include four grades of ammonium salt-type fluorinated surfactants: fluoroalkyl trimethylammonium salt, difluoroalkyl dimethylammonium salt, fluoroalkyl dimethyl benzylammonium salt, fluoroalkenyl trimethylammonium salt, difluoroalkenyl dimethylammonium salt, and fluoroalkenyl dimethyl benzylammonium salt. Among these fluorinated cationic surfactants, fluoroalkenyl trimethylammonium salt is preferred, and perfluoroalkenyl trimethylammonium salt is even more preferred.

[0017] Examples of fluorinated anionic surfactants include fluoroalkyl sulfonates, fluoroalkyl carboxylates, fluoroalkyl phosphates, fluoroalkenyl sulfonates, fluoroalkenyl carboxylates, and fluoroalkenyl phosphates.

[0018] As fluorinated amphoteric surfactants, examples include fluorinated betaine-type surfactants such as fluoroalkyl dimethyl betaine and fluoroalkenyl dimethyl betaine; and fluorinated amino acid-type surfactants such as fluoroalkyl amino propionate and fluoroalkenyl amino propionate.

[0019] These fluorinated surfactants can be used alone or in combination of two or more.

[0020] In the antifogging agent composition of the present invention, the content of fluorinated surfactant can be, for example, 0.01 to 20% by weight, preferably 0.01 to 10% by weight, more preferably 0.05 to 5% by weight, and even more preferably 0.1 to 5% by weight.

[0021] [Diol Ether] The antifogging agent of this invention contains glycol ether at a content of less than 10% by weight. By using a fluorinated surfactant in combination with glycol ether at a content of less than 10% by weight, excellent antifogging properties and coating uniformity can be achieved.

[0022] Diol ethers are compounds in which diols are bonded to alkyl or aryl groups via ether bonds.

[0023] There is no particular limitation on the number of carbon atoms in the alkyl group bonded to the glycol ether; examples include 1 to 3, preferably 1 or 2, and even more preferably 1. The alkyl group bonded to the glycol ether can be either straight-chain or branched. Furthermore, there is no particular limitation on the type of aryl group bonded to the glycol ether; examples include phenyl, benzyl, tolyl, xylyl, etc.

[0024] The type of glycol ether used in this invention is not particularly limited, and may include, for example, any of the following: monoalkyl glycol monoalkyl ether, monoalkyl glycol dialkyl ether, ester of monoalkyl glycol monoaryl ether, monoalkyl glycol diaryl ether, polyalkyl glycol monoalkyl ether, ester of polyalkyl glycol monoalkyl ether, polyalkyl glycol monoaryl ether, ester of polyalkyl glycol monoaryl ether, and polyalkyl glycol diaryl ether. Among these glycol ethers, from the viewpoint of enabling the composition of this invention to possess superior anti-fogging properties and coating uniformity, monoalkyl glycol monoalkyl ether and polyalkyl glycol monoalkyl ether are preferred examples.

[0025] Examples of monoalkyl glycol monoalkyl ethers include: ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, and other ethylene glycol monoalkyl ethers; propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, and other propylene glycol monoalkyl ethers. Among these monoalkyl glycol monoalkyl ethers, propylene glycol monomethyl ether and propylene glycol monopropyl ether are preferred, with propylene glycol monomethyl ether being even more preferred.

[0026] Examples of polyalkylene glycol monoalkyl ethers include: diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, etc.; dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monopropyl ether, etc.; triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monopropyl ether, etc.; tripropylene glycol monomethyl ether, tripropylene glycol monoethyl ether, tripropylene glycol monopropyl ether, etc. Among these polyalkylene glycol monoalkyl ethers, dipropylene glycol monomethyl ether and tripropylene glycol monomethyl ether are preferred, and dipropylene glycol monomethyl ether is even more preferred.

[0027] These glycol ethers can be used alone or in combination of two or more.

[0028] In the antifogging agent composition of the present invention, the content of glycol ether only needs to be greater than 0% by weight and less than 10% by weight. However, from the viewpoint of enabling the composition of the present invention to have better antifogging properties and coating uniformity, 0.1% to 10% by weight is preferred, 0.5% to 10% by weight is more preferred, and 0.5% to 5% by weight is more preferred. If the content of glycol ether is greater than 10% by weight, the composition of the present invention cannot have excellent antifogging properties and coating uniformity.

[0029] In the antifogging agent composition of the present invention, there is no particular limitation on the ratio of fluorinated surfactant to glycol ether. For example, the glycol ether can be 10 to 2000 parts by weight relative to 100 parts by weight of fluorinated surfactant. From the viewpoint of enabling the composition of the present invention to have better antifogging properties and coating uniformity, the glycol ether is preferably 15 to 1500 parts by weight relative to 100 parts by weight of fluorinated surfactant, more preferably 20 to 1000 parts by weight, more preferably 30 to 700 parts by weight, and especially preferably 35 to 500 parts by weight.

[0030] [Monovalent lower alcohols] The antifogging agent composition of this invention may contain monovalent lower alcohols as needed. When containing monovalent lower alcohols, it not only imparts excellent antifogging properties to hard surfaces, but also enhances the removal of dirt from hard surfaces.

[0031] The term "monovalent lower alcohol" refers to monovalent alcohols with 1 to 5 carbon atoms, specifically including methanol, ethanol, 1-propanol, isopropanol, 1-butanol, 2-butanol, isobutanol, and t-butanol. Among these monovalent lower alcohols, ethanol and isopropanol are preferred, and isopropanol is even more preferred. When the antifogging agent composition of the present invention is used on eyeglass lenses, if it contains isopropanol, it can significantly improve the removal of dirt adhering to the eyeglass lenses.

[0032] These monovalent lower alcohols can be used alone or in combination of two or more.

[0033] If the antifogging agent composition of the present invention contains a monovalent lower alcohol, its content is not particularly limited, for example, 1 to 90% by weight, preferably 5 to 60% by weight, and more preferably 20 to 40% by weight.

[0034] [water] The antifogging agent composition of the present invention may contain water as needed. If the antifogging agent composition of the present invention contains water, its content is not particularly limited, for example, 1 to 95% by weight, preferably 10 to 90% by weight, and more preferably 40 to 75% by weight.

[0035] Surface tension There is no particular limitation on the surface tension of the antifogging agent composition of the present invention; for example, a surface tension of 30 mN / m or less at 25°C is acceptable. From the viewpoint of enabling the composition of the present invention to possess superior antifogging properties and coating uniformity, a surface tension of 1 to 28 mN / m or less at 25°C is preferred, more preferably 5 to 27 mN / m, and even more preferably 10 to 25 mN / m. In the present invention, the surface tension is a value measured using the Wilhelmy method with platinum plates at 25°C.

[0036] [Other ingredients] Furthermore, in addition to the aforementioned components, the antifogging agent composition of the present invention may also contain fragrances, surfactants other than fluorinated surfactants, coolants, preservatives, bactericides, thickeners, pH adjusters, ultraviolet absorbers, etc., as needed.

[0037] [use] The anti-fogging agent composition of this invention is used to impart anti-fogging properties to hard surfaces. There is no particular limitation on the type of hard surface to which the anti-fogging agent composition of this invention is applicable; examples include, for instance, eyeglass lenses, smartphone screens, clock covers, computer or television screens, and transparent hard surfaces such as mirrors. Eyeglass lenses are a preferred example among these.

[0038] In this invention, "eyeglasses" refers to devices worn around the eyes for purposes such as eye correction, eye protection, and eye-related decoration. The types of eyeglass lenses to which the anti-fog agent composition of this invention is applicable are not particularly limited, and examples include spectacle lenses, sunglasses lenses, safety goggles, face shields, sports goggles, and contact lenses. Among these, spectacle lenses, sunglasses lenses, safety goggles, face shields, and sports goggles are preferred, more preferably spectacle lenses, sunglasses lenses, safety goggles, and face shields, and even more preferably spectacle lenses and sunglasses lenses, with spectacle lenses being particularly preferred.

[0039] To impart anti-fogging properties to hard surfaces using the anti-fogging agent composition of the present invention, it is simply necessary to apply the anti-fogging agent composition of the present invention to the hard surface. There are no particular limitations on the method of applying the anti-fogging agent composition of the present invention to the hard surface; examples include: applying an anti-fogging sheet made by impregnating a base agent sheet with the anti-fogging agent composition of the present invention to the hard surface; and applying or spraying the anti-fogging agent composition of the present invention onto the hard surface, followed by wiping it off with a dry cloth or paper towel. The anti-fogging sheet made by impregnating a base agent sheet with the anti-fogging agent composition of the present invention is excellent in terms of portability, ease of application, and ease of removing adhering dirt; therefore, the method of using the aforementioned anti-fogging sheet is suitable as a method for applying the anti-fogging agent composition of the present invention to hard surfaces. Furthermore, the aforementioned anti-fogging sheet will be described later.

[0040] The amount of the anti-fogging agent composition of the present invention applied to a hard surface can be adjusted appropriately according to the type or area of ​​the hard surface and the degree of anti-fogging effect to be imparted.

[0041] Furthermore, the anti-fogging agent composition of the present invention, in addition to imparting anti-fogging properties to hard surfaces, is also suitable for wiping away dirt adhering to hard surfaces, and therefore can also be used for cleaning hard surfaces. In particular, the anti-fogging agent composition of the present invention can remove dirt adhering to eyeglass lenses while imparting anti-fogging properties, and is therefore suitable for use as an anti-fogging cleaning agent for eyeglass lenses.

[0042] 2. Anti-fog sheet The anti-fog sheet of the present invention is characterized by comprising the aforementioned anti-fog agent composition and a substrate sheet, wherein the aforementioned anti-fog agent composition permeates the substrate sheet. Because the anti-fog sheet of the present invention can easily wipe away dirt adhering to hard surfaces, it is also suitable for cleaning hard surfaces. Furthermore, the anti-fog sheet of the present invention can remove dirt adhering to eyeglass lenses while imparting anti-fog properties, thus it is also suitable as an anti-fog eyeglass lens cleaning product.

[0043] The substrate sheet used as the anti-fogging sheet of the present invention is not particularly limited as long as it is a sheet material that can be impregnated with the aforementioned anti-fogging agent composition, and can be either paper or cloth. If it is cloth, it can be either woven or non-woven fabric. Among the substrate sheets, non-woven fabric is preferred in terms of being able to fully impregnate with the aforementioned anti-fogging agent composition.

[0044] When the substrate sheet is fabric, there are no particular limitations on the fibers constituting the fabric. Examples include: cellulose fibers such as cotton or pulp; regenerated fibers; chemical fibers such as polyethylene, polypropylene, polyester, acrylic, and nylon; and blended fibers of these.

[0045] In the anti-fog sheet of the present invention, the impregnation amount of the aforementioned anti-fog agent composition can be appropriately set according to the type of base sheet used. For example, for every 100 parts by weight of the base sheet, the eyeglass cleaning agent composition is 50 to 300 parts by weight, preferably 60 to 100 parts by weight. [Example]

[0046] The present invention will be further described in detail below by way of examples; however, the present invention is not limited by these examples.

[0047] In addition, the types and trade names of surfactants used in the following examples and comparative examples are as follows. Fluorine-based nonionic surfactant 1: 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecylfluorooctylethylene oxide adduct .Fluoro-based nonionic surfactants 2: Perfluoroalkyl ethylene oxide adducts Fluoropolymer nonionic surfactant 3: Trade name "Thetawet8150" (Innovative Chemical Technologies, Inc); the content of fluoropolymer nonionic surfactant 3 shown in the postscript table is the content of fluoropolymer nonionic surfactant itself contained in "Thetawet8150". Fluorinated cationic surfactant 1: Quaternary ammonium salt type fluorinated surfactant with perfluoroolefin group. Fluorine-based anionic surfactant 1: Sodium perfluoroolefin sulfonate Fluoropolymer anionic surfactant 2: A fluoropolymer anionic surfactant with a structure different from fluoropolymer anionic surfactant 1. Fluorinated amphoteric surfactant 1: Trade name "Surflon S-233" (AGC Seimi Chemical Co., Ltd.); The content of fluorinated amphoteric surfactant 1 shown in the postscript table is the content of fluorinated amphoteric surfactant itself contained in "Surflon S-233". Amphoteric surfactant 1: Dodecyl hydroxysulfonate betaine

[0048] Experimental Example 1 1. Test Methods Anti-fogging agent compositions for eyeglass lenses with the compositions shown in Tables 1-4 were prepared. The coating uniformity and anti-fogging effect of the obtained anti-fogging agent compositions were evaluated using the following methods.

[0049] <Evaluation Methods for Coating Uniformity> A wiping paper (10cm x 13cm, KAYDRY wiper manufactured by Nippon Paper Corporation) was folded into four folds. 50μl of the anti-fog agent composition was then applied to the center of the fold. The coating was then applied gently back and forth five times against the concave surface of an eyeglass lens (water-repellent coated lens, refractive index 1.60, SL 982 VP manufactured by HOYA Corporation). After coating, the uniformity of the coating was evaluated according to the following criteria. Criteria for judging coating uniformity A: It's easy to apply and can be spread evenly without unevenness. B: It is easy to spread and can be spread relatively evenly with only slight unevenness. C: It is not easy to spread and may cause uneven application. D: Difficult to spread and causes uneven application.

[0050] <Evaluation Methods for Anti-fog Effectiveness>

[0051] Fold a wiping paper (10cm x 13cm, KAYDRY wiper manufactured by CRECIA, Nippon Paper Co., Ltd.) into four folds, and immerse 50μl of the anti-fog agent composition in its center. Then, apply the anti-fog agent composition by gently spreading it back and forth five times on the concave surface of the eyeglass lens (water-repellent coated lens, refractive index 1.60, SL 982 VP manufactured by HOYA, Ltd.). Fix the lens with the anti-fog agent composition applied in this way above warm water at 34°C, 5cm above the water surface, and let it stand for 5 minutes. At this time, the lens is positioned with the anti-fog agent composition coated side down, that is, the side directly exposed to the warm water vapor. After standing for 5 minutes, observe the appearance of the lens and evaluate the degree of fogging according to the following judgment criteria. For reference, a photograph of the lens appearance that conforms to each judgment criterion is shown in Figure 1. Criteria for judging anti-fog effect AA: Completely clear with no fogging. A: It was almost foggy and clear. B: Fogging has occurred, but the inside of the lens is still visible. C: Excessive fogging occurs, making it impossible to see the inside of the lens.

[0052] 2. Test Results The results are shown in Tables 1-4. Even when fluorinated surfactants were present but glycol ethers were absent, it was impossible to achieve good coating uniformity and anti-fogging effect simultaneously (Comparative Examples 1-5, 13, 14). Furthermore, when glycol ethers were present but no fluorinated surfactants were absent, coating uniformity and anti-fogging effect were also poor (Comparative Examples 6 and 7). In addition, even when fluorinated surfactants and glycol ethers were present, if the glycol ether content was greater than 10% by weight, coating uniformity and anti-fogging effect were insufficient (Comparative Examples 8-12 and 15-17). In contrast, when fluorinated surfactants and glycol ethers were present but the glycol ether content was less than 10% by weight, coating uniformity was good and excellent anti-fogging effect was achieved (Examples 1-30).

[0053] [Table 1] Example 1 2 3 4 5 6 7 8 9 10 11 12 13 Fluorine-based nonionic surfactants 1 0.5 1.0 1.0 1.0 1.0 - - - - - - - - Fluorine-based cationic surfactants 1 - - - - - 1.0 1.0 1.0 1.0 - - - - Fluorine-based anionic surfactants 1 - - - - - - - - - 1.0 1.0 1.0 1.0 Propylene glycol monomethyl ether 3 0.5 3 5 10 0.5 3 5 10 0.5 3 5 10 Isopropanol 30 30 30 30 30 30 30 30 30 30 30 30 30 water Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Total (by weight) 100 100 100 100 100 100 100 100 100 100 100 100 100 Coating uniformity A A A A A A A A A A A A A Anti-fog effect (coating operation repeated 5 times) A AA AA AA AA AA AA AA AA AA AA AA A

[0054] [Table 2] Example 14 15 16 17 18 19 20 twenty one twenty two twenty three twenty four 25 Fluorine-based anionic surfactants 1 - - - - - - - - - - 1.0 1.0 Fluorine-based nonionic surfactants 3 1.0 1.0 1.0 1.0 - - - - - - - - Fluorine-based anionic surfactants 2 - - - - 1.0 1.0 1.0 1.0 - - - - Fluorine-based amphoteric surfactants 1 - - - - - - - - 1.0 1.0 - - Propylene glycol monomethyl ether 0.5 3 5 10 0.5 3 5 10 3 10 - 3 Dipropylene glycol monomethyl ether - - - - - - - - - - 3 - Isopropanol 30 30 30 30 30 30 30 30 30 30 30 - ethanol - - - - - - - - - - - 30 water Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Total (by weight) 100 100 100 100 100 100 100 100 100 100 100 100 Coating uniformity A A A A A A A A A A A A Anti-fog effect (coating operation repeated 5 times) AA AA AA AA AA AA AA AA AA A AA A

[0055] [Table 3] Comparative example 1 2 3 4 5 6 7 8 9 10 11 12 Fluorine-based nonionic surfactants 1 0.5 - - - - - - 0.5 - - - - Fluorine-based cationic surfactants 1 - 1.0 - - - - - - 1.0 - - - Fluorine-based anionic surfactants 1 - - 1.0 - - - - - - 1.0 - - Fluorine-based nonionic surfactants 3 - - - 1.0 - - - - - - 1.0 - Fluorine-based anionic surfactants 2 - - - - 1.0 - - - - - - 1.0 Propylene glycol monomethyl ether - - - - - 3 17.5 17.5 17.5 17.5 17.5 17.5 Isopropanol 30 30 30 30 30 30 30 30 30 30 30 30 water Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Total (by weight) 100 100 100 100 100 100 100 100 100 100 100 100 Coating uniformity B B B B B B C C C C C C Anti-fog effect (coating operation repeated 5 times) C C C C C C C C C C C C

[0056] [Table 4] Example Comparative example 26 27 28 29 30 13 14 15 16 17 Fluorine-based nonionic surfactants 2 1.0 1.0 - - - - - - - - Fluorine-based cationic surfactants 1 - - 1.0 - - 1.0 - 1.0 - - Fluorine-based anionic surfactants 1 1.0 - - 1.0 1.0 - 1.0 - 1.0 1.0 Fluorine-based amphoteric surfactants 1 - 1.0 1.0 1.0 - 1.0 1.0 1.0 1.0 - Amphoteric surfactant 1 - - - - 0.45 - - - - 0.45 Propylene glycol monomethyl ether 3.0 3.0 3.0 3.0 3.0 - - 17.5 17.5 17.5 Isopropanol 30 30 30 30 30 30 30 30 30 30 water Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Remaining Total (by weight) 100 100 100 100 100 100 100 100 100 100 Coating uniformity A A A A A B B C C C Anti-fog effect (coating operation repeated 5 times) A A A AA AA C A C C C

[0057] (none)

Claims

1. An antifogging agent composition comprising a fluorinated surfactant, a glycol ether, a monovalent lower alcohol and water, wherein the glycol ether comprises less than 10% by weight, the monovalent lower alcohol comprises 20-40% by weight, and the water comprises 40-75% by weight.

2. The antifogging agent composition of claim 1, wherein the aforementioned glycol ether is selected from at least one of the group consisting of monoalkyl glycol monoalkyl ethers, esters of monoalkyl glycol monoalkyl ethers, polyalkyl glycol monoalkyl ethers, monoalkyl glycol monoaryl ethers, and polyalkyl glycol dialkyl ethers.

3. The antifogging agent composition as claimed in claim 1 or 2, wherein the content of the aforementioned fluorinated surfactant is 0.1 to 20% by weight.

4. The antifogging agent composition as claimed in claim 1 or 2, wherein the aforementioned monovalent lower alcohol is isopropanol and / or ethanol.

5. The antifog composition as claimed in item 1 or 2, which is used in eyeglass lenses.

6. An anti-fogging sheet comprising an anti-fogging agent composition as claimed in claim 1 or 2, and a substrate sheet, wherein the anti-fogging agent composition is impregnated in the substrate sheet.

7. The anti-fog sheet as described in claim 6 is used in eyeglass lenses.

8. A method for preventing fogging on a hard surface, comprising applying an antifogging agent composition as claimed in claim 1 or 2 to the hard surface.

9. The anti-fog method for a hard surface as described in claim 8, wherein the aforementioned hard surface is the surface of an eyeglass lens.

10. Use of a composition for imparting anti-fogging properties to a hard surface, wherein the composition contains a fluorinated surfactant, a glycol ether, a monovalent lower alcohol and water, wherein the content of the glycol ether is less than 10% by weight, the content of the monovalent lower alcohol is 20-40% by weight, and the content of water is 40-75% by weight.

11. The use of a sheet material for imparting anti-fogging properties to a rigid surface, the sheet material comprising a composition and a substrate sheet, wherein the anti-fogging composition is impregnated in the substrate sheet; the composition comprises a fluorinated surfactant, a glycol ether, a monovalent lower alcohol and water, wherein the content of the glycol ether is less than 10% by weight, the content of the monovalent lower alcohol is 20-40% by weight, and the content of the water is 40-75% by weight.

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