Lipophilic glass-based coating film, electronic device, construction, and component constituting construction

Abstract

To provide a lipophilic glass-based coating film which can be formed on a surface of a base material without requiring labor and time at a low cost, and has an effect of concealing a finger print of a person so that the finger print becomes inconspicuous.SOLUTION: A lipophilic glass-based inorganic coating film or an organic / inorganic coating film 10a is a coating film obtained by applying a coating liquid containing polysilazane, long-chain organic group-modified dimethylmethoxysilane, and solvents to a surface of a base material and drying the coating liquid, and a lipophilic property of the coating film is 20° or less at an angle of contact of about 1 μl of oleic acid. The long-chain organic group-modified dimethylmethoxysilane includes C8(n-octyldimethylmethoxysilane) and C18(n-octadecyldimethylmethoxysilane).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lipophilic glass-based coating film formed on the surface of a substrate, and also to an electronic device, a building, and a member constituting a building, on which a lipophilic glass-based coating film is formed. [Background technology]

[0002] A coating film has been disclosed that is formed from a coating agent in which fine particles of a water-insoluble metal compound, an inorganic polymer having Si-O bonds, Al-O bonds, Ti-O bonds, Zr-O bonds, or Sn-O bonds and hydroxyl groups in its molecules, and transparent nanofibers are dispersed in a solvent, the transparent nanofiber content being 0.1 mass% or more of the total solid content, and the static contact angle between the coating film surface and a water droplet measured using the θ / 2 method with a contact angle measuring device is 10° or less, and that exhibits superhydrophilicity when applied to a glass substrate and dried at temperatures between 20° and 150°C (see Patent Document 1). This coating film can also be used as an anti-fingerprint film. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-90595 Summary of the Invention [Problem to be solved by the invention]

[0004] The coating film disclosed in Patent Document 1 contains transparent nanofibers in an amount of 0.1 mass% or more relative to the total solid content, which means that the production of the transparent nanofibers is time-consuming and costly, making it impossible to form a coating film to be used as an anti-fingerprint film in a time-consuming and inexpensive manner.

[0005] An object of the present invention is to provide a lipophilic glass-based coating film that can be formed on the surface of a substrate at low cost without requiring much labor and has the effect of concealing human fingerprints, making the fingerprints less noticeable. [Means for solving the problem]

[0006] The lipophilic glass-based coating film according to the present invention, which solves the above-mentioned problems, is a coating film obtained by applying a coating liquid containing polysilazane, long-chain organic group-modified dimethylmethoxysilane, and a solvent to the surface of a substrate and drying the coating liquid, and is characterized in that the lipophilicity of the coating film is such that the contact angle of approximately 1 μl of oleic acid at room temperature is 20° or less.

[0007] An example of the lipophilic glass-based coating film of the present invention has a contact angle of oleic acid of 10° or less.

[0008] In another example of the lipophilic glass-based coating film of the present invention, the polysilazane forming the coating film is an inorganic polysilazane, and the lipophilic glass-based coating film is an inorganic coating film or an organic / inorganic hybrid coating film.

[0009] As another example of the lipophilic glass-based coating film of the present invention, the long-chain organic group-modified dimethylmethoxysilane that forms the coating film contains two or more types of organic groups that differ in the number of carbon atoms.

[0010] As another example of the lipophilic glass-based coating film of the present invention, the long-chain organic group-modified dimethylmethoxysilane may be C8 (n-octyldimethylmethoxysilane) or C 18 (n-octadecyldimethylmethoxysilane).

[0011] As another example of the lipophilic glass-based coating film of the present invention, the long-chain organic group-modified dimethylmethoxysilane includes C8 (n-octyldimethylmethoxysilane) and C 18(n-octadecyldimethylmethoxysilane).

[0012] Another example of the lipophilic glass-based coating film of the present invention is C8 (n-octyldimethylmethoxysilane) and C 18 The mass ratio of (n-octadecyldimethylmethoxysilane) to long-chain organic group-modified dimethylmethoxysilane is 0.1≦C 18 / (C8+C 18 )≦0.8 is satisfied.

[0013] In another example of the lipophilic glass-based coating film of the present invention, the solvent contained in the coating liquid is dibutyl ether.

[0014] Another example of the lipophilic glass-based coating film of the present invention is one in which the content of polysilazane contained in the coating liquid is in the range of 1% by mass or more and 15% by mass or less, relative to 100% by mass of the coating liquid, the content of long-chain organic group-modified dimethylmethoxysilane contained in the coating liquid is in the range of 1% by mass or more and 15% by mass or less, relative to 100% by mass of the coating liquid, and the content of solvent contained in the coating liquid is in the range of 70% by mass or more and 98% by mass or less, relative to 100% by mass of the coating liquid.

[0015] Another example of the lipophilic glass-based coating film of the present invention is a substrate on which the lipophilic glass-based coating film is formed, which is glass, metal, or plastic.

[0016] The electronic device according to the present invention, which solves the above-mentioned problems, is characterized in that the substrate is an electronic device, and a lipophilic glass-based coating film is formed on the glass part of the electronic device, the metal part of the electronic device, the plastic part of the electronic device, and the black glossy part of the electronic device, making human fingerprints on these parts less noticeable.

[0017] Examples of the electronic device of the present invention include a smartphone, a personal computer, a tablet, a car navigation system, a digital signage, a television, or a home appliance equipped with a display or a touch panel.

[0018] In order to solve the above problems, the present invention provides a structure and a component constituting the structure, characterized in that the substrate is a structure and a component constituting the structure, and an oil-philic glass-based coating film is formed on the glass parts of the structure and the component constituting the structure, the metal parts of the structure and the component constituting the structure, the plastic parts of the structure and the component constituting the structure, and the black glossy parts of the structure and the component constituting the structure, making human fingerprints on these parts less noticeable.

[0019] Examples of the building and components constituting the building of the present invention include window glass, doors, handrails, handles, operation buttons attached to the building, and displays or touch panels attached to the building. [Effects of the Invention]

[0020] The lipophilic glass-based coating film of the present invention is produced by applying a coating liquid containing polysilazane, long-chain organic group-modified dimethylmethoxysilane, and a solvent to the surface of a substrate and drying it. The lipophilicity is such that the contact angle of approximately 1 μl of oleic acid is 20° or less, so that the coating film can be formed on the surface of the substrate easily and inexpensively. Because the coating film has lipophilicity due to the long-chain organic group-modified dimethylmethoxysilane, human fingerprints adhering to the substrate become flat on the surface of the substrate on which the coating film is formed, and this has an excellent effect of concealing the fingerprints, making the fingerprints adhering to the surface of the substrate less noticeable.

[0021] Since the contact angle of oleic acid with the lipophilic glass-based coating film is 10° or less, fingerprints adhering to the substrate become flat on the surface of the substrate on which the coating film is formed, providing an excellent effect of concealing the fingerprints, thereby reliably making fingerprints adhering to the surface of the substrate less noticeable.

[0022] The lipophilic glass-based coating film uses an inorganic polysilazane as its forming material, and the coating film is an inorganic coating film or an organic / inorganic hybrid coating film. Therefore, not only can fingerprints on the surface of the substrate be made less noticeable, but the inorganic coating film or organic / inorganic hybrid coating film has excellent strength and excellent scratch resistance, making it possible to smooth the surface of the substrate on which the inorganic coating film or organic / inorganic hybrid coating film is formed, and preventing scratches on the surface of the substrate on which the inorganic coating film or organic / inorganic hybrid coating film is formed.

[0023] The lipophilic glass-based coating film is formed by long-chain organic group-modified dimethylmethoxysilane that contains two or more types of organic groups with different carbon numbers, which ensures that the coating film is lipophilic. This means that fingerprints adhering to the substrate are flattened on the surface of the substrate on which the coating film is formed, and the coating film has an excellent effect of concealing the fingerprints, making fingerprints adhering to the surface of the substrate less noticeable.

[0024] The lipophilic glass coating film is a long-chain organic group modified dimethyl methoxy silane with C8 (n-octyl dimethyl methoxy silane) or C 18 The inclusion of (n-octadecyldimethylmethoxysilane) can increase the mobility and lipophilicity of the coating film, thereby reliably imparting lipophilicity to the coating film. Because the lipophilic glass-based coating film has excellent lipophilicity, fingerprints left on the substrate are flattened on the surface of the substrate on which the coating film is formed, and the coating film has an excellent effect of concealing the fingerprints, reliably making the fingerprints left on the surface of the substrate less noticeable.

[0025] The lipophilic glass coating film is a long-chain organic group-modified dimethyl methoxy silane, C8 (n-octyl dimethyl methoxy silane) and C 18The inclusion of (n-octadecyldimethylmethoxysilane) can increase the mobility and lipophilicity of the coating film, thereby reliably imparting lipophilicity to the coating film. Because the lipophilic glass-based coating film has excellent lipophilicity, fingerprints left on the substrate are flattened on the surface of the substrate on which the coating film is formed, and the coating film has an excellent effect of concealing the fingerprints, reliably making the fingerprints left on the surface of the substrate less noticeable.

[0026] The lipophilic glass coating film is made by mixing dimethyl methoxysilane with a long-chain organic group in a mass ratio of 0.1≦C. 18 / (C8+C 18 )≦0.8 and C8 (n-octyldimethylmethoxysilane) 18 Since the long-chain organic group-modified dimethyl methoxy silane contains (n-octadecyldimethylmethoxy silane), the mobility and lipophilicity of the coating film can be increased, and lipophilicity can be reliably imparted to the coating film. Because the lipophilic glass-based coating film has excellent lipophilicity, fingerprints adhering to the substrate are flattened on the surface of the substrate on which the coating film is formed, and the coating film has an excellent effect of concealing the fingerprints, reliably making fingerprints adhering to the surface of the substrate less noticeable.

[0027] The lipophilic glass-based coating film uses dibutyl ether as the solvent in the coating liquid, which allows the coating liquid to be applied evenly and smoothly to the surface of the substrate, forming a coating film of uniform thickness on the surface of the substrate.The coating film has an excellent effect of concealing fingerprints, and can reliably make fingerprints on the surface of the substrate less noticeable.

[0028] The lipophilic glass-based coating film has a polysilazane content in the coating liquid in the range of 1% by mass or more and 15% by mass or less, relative to 100% by mass of the coating liquid, a long-chain organic group-modified dimethylmethoxysilane content in the coating liquid in the range of 1% by mass or more and 15% by mass or less, relative to 100% by mass of the coating liquid, and a solvent content in the coating liquid in the range of 70% by mass or more and 98% by mass or less, relative to 100% by mass of the coating liquid. Therefore, the coating film not only has an excellent effect of concealing fingerprints on the surface of the substrate and can reliably make fingerprints on the surface of the substrate less noticeable, but also has excellent strength and excellent scratch-resistant properties, can smooth the surface of the substrate on which the coating film is formed, can protect the surface of the substrate on which the coating film is formed, and can prevent scratches on the surface of the substrate.

[0029] When a lipophilic glass-based coating film is formed on a surface of glass, metal, or plastic, fingerprints adhering to the surface of the glass, metal, or plastic become flat on the surface of the glass, metal, or plastic on which the lipophilic glass-based coating film is formed, and the coating film has an excellent effect of concealing fingerprints adhering to these surfaces, thereby reliably making fingerprints adhering to the surface of the glass, metal, or plastic less noticeable.

[0030] According to the electronic device of the present invention, a lipophilic glass-based coating film can be formed on the glass, metal, plastic, or glossy black portions of the electronic device without any hassle or effort and at low cost, and fingerprints adhering to the glass, metal, plastic, or glossy black portions of the electronic device are flattened on the surfaces of the glass, metal, plastic, or glossy black portions of the electronic device on which the lipophilic glass-based coating film is formed, and the lipophilic glass-based coating film has an excellent effect of concealing fingerprints adhering to these surfaces of the electronic device, thereby reliably making fingerprints adhering to the glass, metal, plastic, or glossy black portions of the electronic device less noticeable. Because the glass, metal, plastic, or glossy black portions of the electronic device are covered with a lipophilic glass-based coating film that has excellent strength and excellent scratch resistance, the surfaces of the glass, metal, plastic, or glossy black portions of the electronic device on which the coating film is formed can be smoothed and the surfaces of the glass, metal, plastic, or glossy black portions of the electronic device on which the coating film is formed can be protected, preventing scratches on these surfaces.

[0031] When the electronic device is a smartphone, personal computer, tablet, car navigation system, digital signage, television, or home appliance equipped with a display or touch panel, fingerprints adhering to the electronic device become flat on the surface of the electronic device on which the lipophilic glass-based coating film is formed, and the lipophilic glass-based coating film has an excellent effect of concealing fingerprints adhering to the surface of the electronic device, thereby reliably making fingerprints adhering to the surface of each electronic device less noticeable.

[0032] According to the structures and components constituting the structures of the present invention, lipophilic glass-based coating films can be formed on the glass parts of the structures and components constituting the structures, the metal parts of the structures and components constituting the structures, the plastic parts of the structures and components constituting the structures, and the glossy black parts of the structures and components constituting the structures without any effort and at low cost, and human fingerprints adhering to the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the structures and components constituting the structures become flat on the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the structures and components constituting the structures on which the lipophilic glass-based coating film has been formed, and the lipophilic glass-based coating film has an excellent effect of concealing fingerprints adhering to these surfaces of the structures, making it possible to reliably make fingerprints adhering to the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the structures and components constituting the structures inconspicuous. The glass, metal, plastic and glossy black parts of the building and the components that make up the building are coated with an oleophilic glass-based coating film that has excellent strength and excellent scratch resistance, so that the surfaces of the glass, metal, plastic and glossy black parts of the building and the components that make up the building on which the coating film is formed can be smoothed, and the surfaces of the glass, metal, plastic and glossy black parts of the building and the components that make up the building on which the coating film is formed can be protected, preventing scratches on these surfaces.

[0033] When a building or a component of a building, or when the component of a building is a window glass, door, handrail, handle, operation button attached to the building, display or touch panel attached to the building, fingerprints adhering to these components and the components of the building become flat on the surface of the components of the building on which the lipophilic glass-based coating film is formed, and the lipophilic glass-based coating film has an excellent effect of concealing fingerprints adhering to the surface of the components of the building, thereby reliably making fingerprints adhering to the surface of each component of the building inconspicuous. [Brief explanation of the drawings]

[0034] [Figure 1] FIG. 2 is an enlarged cross-sectional image diagram showing an example of an oleophilic glass-based coating film formed on the surface of a substrate. [Figure 2] FIG. 10 is an enlarged cross-sectional image diagram showing another example of an oleophilic glass-based coating film formed on the surface of a substrate. [Figure 3] FIG. 10 is an enlarged cross-sectional image diagram showing another example of an oleophilic glass-based coating film formed on the surface of a substrate. [Figure 4] An image showing an example of the chain length of C8 (n-octyldimethylmethoxysilane). [Figure 5] An image showing an example of the chain length of C18 (n-octadecyldimethylmethoxysilane). [Figure 6] This is a cross-sectional view illustrating the mechanism by which a lipophilic glass-based coating film is formed from a coating liquid on the surface of a substrate coated with the coating liquid. [Figure 7] 1 is an image diagram showing an example of the structure of a lipophilic glass-based inorganic coating film. [Figure 8] An image showing an example of the structure of an oleophilic glass-based organic / inorganic coating film. [Figure 9] This figure shows the relationship between C18 / (C8+C18) and the contact angle (°) of oleic acid on a soda-lime glass substrate and a single-crystal silicon substrate on which an oleophilic glass-based inorganic coating film or an oleophilic glass-based organic / inorganic hybrid coating film is formed. [Figure 10] FIG. 1 is a graph showing the relationship between the water contact angle (°) and a soda-lime glass substrate on which a lipophilic glass-based inorganic coating film or a lipophilic glass-based organic / inorganic hybrid coating film is formed. DETAILED DESCRIPTION OF THE INVENTION

[0035] The lipophilic glass-based coating films 10a to 10c according to the present invention will be described in detail below with reference to the accompanying drawings. Fig. 1 is an enlarged cross-sectional image of an example of lipophilic glass-based coating film 10a formed on surface 12 of substrate 11, and Fig. 2 is an enlarged cross-sectional image of another example of lipophilic glass-based coating film 10b formed on surface 12 of substrate 11. Fig. 3 is an enlarged cross-sectional image of another example of lipophilic glass-based coating film 10c formed on surface 12 of substrate 11, and Fig. 4 is an image showing an example of the chain length of C8 (n-octyldimethylmethoxysilane).

[0036] Figure 5 shows the C 18 FIG. 6 is a schematic diagram showing an example of the chain length of C8 (n-octadecyldimethylmethoxysilane), and FIG. 6 is a cross-sectional view illustrating, in time sequence, the mechanism by which lipophilic glass-based coating films 10a-10c are formed from a coating liquid 13 on a surface 12 of a substrate 11 coated (applied) with the coating liquid 13. FIG. 7 is a schematic diagram showing an example of the structure of lipophilic glass-based inorganic coating films 10a-10c, and FIG. 8 is a schematic diagram showing an example of the structure of lipophilic glass-based organic / inorganic coating films 10a-10c. In FIGS. 1 to 5, C8 (n-octyldimethylmethoxysilane) and C 18 Although the chain length of (n-octadecyldimethylmethoxysilane) is illustrated as a visually observable image, in reality, the chain length cannot be visually observed. Fig. 6(a) shows the state immediately after coating liquid 13 on surface 12 of substrate 11, and Fig. 6(b) shows the state in the process of coating films 10a-10c being formed from coating liquid 13. Fig. 6(b) shows the state after all of coating liquid 13 has cured and coating films 10a-10c have been formed on surface 12 of substrate 11.

[0037] The lipophilic glass-based coating film 10a (including lipophilic glass-based coating films 10b and 10c) is produced by coating (applying) a coating liquid 13 onto the surface 12 (front and back) of the substrate 11 to be coated. The hardened coating liquid 13 forms coating films 10a-10c of a predetermined thickness that cover the surface 12 of the substrate 11. The lipophilic glass-based coating films 10a-10c are inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c. The polysilazane that forms the coating films 10a-10c is inorganic polysilazane.

[0038] The coating liquid 13 used to form the lipophilic glass-based coating films 10a-10c contains polysilazane, long-chain organic group-modified dimethylmethoxysilane, and a solvent (organic solvent). The polysilazane used to form the coating liquid 13 is an inorganic polysilazane, Si-N perhydropolysilazane (perhydropolysilazane). As the polysilazane, Si-CN organopolysilazane and Si-C polycarbosilane can be used. Furthermore, SiC-O, Si-BCN, and Si-Ti-N polysilazanes can also be used. Organopolysiloxanes can also be used.

[0039] The polysilazane contained in the coating liquid 13 may be an organic polysilazane, such as modified polysilazane, methylpolysilazane, dimethylpolysilazane, phenylpolysilazane, or vinylpolysilazane. Alternatively, a crosslinked polysilazane may be used that is chemically crosslinked with a compound such as a hydrocarbon compound having a reactive group, such as a hydroxyl group, a vinyl group, an amino group, or a silyl group, which chemically reacts with polysilazane to form a crosslinked structure, a cyclic saturated hydrocarbon compound, a cyclic unsaturated hydrocarbon compound, a saturated heterocyclic compound, an unsaturated heterocyclic compound, or a silicone compound.

[0040] Other examples that can be used include polyborosilazane, inorganic silazane high polymers and modified polysilazanes, copolymerized silazanes, low-temperature ceramic polysilazanes obtained by adding or incorporating a catalytic compound to polysilazane to promote ceramicization, silicon alkoxide-added polysilazanes, glycidol-added polysilazanes, acetylacetonato complex-added polysilazanes, metal carboxylate-added polysilazanes, and polysilazane compositions obtained by adding amines and / or acids to the above-mentioned various polysilazanes or modified products.

[0041] The polysilazane may be a single type of polysilazane, a mixture of two or more types of polysilazanes selected from various polysilazanes, or a polysilazane copolymer consisting of two or more types of polysilazane structures, and each molecule contains at least one hydrogen atom directly bonded to a silicon atom. The polysilazane forming the coating liquid 13 has a weight-average molecular weight in the range of 100 to 100,000,000, preferably 1,000 to 1,000,000, and more preferably 2,000 to 500,000, from the viewpoints of solubility in solvents and ease of application. A weight-average molecular weight of 100 or greater results in low volatility, which can lead to deterioration of the coating film quality due to evaporation of the solvent and evaporation of the polysilazane itself during the curing process.

[0042] Because the number-average molecular weight of the polysilazane (perhydropolysilazane, organopolysilazane, organopolysiloxane, etc.) in the coating liquid 13 is within the above range, the polysilazane-containing coating liquid 13 can maintain a predetermined viscosity, and lipophilic glass-based inorganic coating films 10a-10c or lipophilic glass-based organic / inorganic hybrid coating films 10a-10c can be formed from the coating liquid 13. Because the coating liquid 13 is applied to the surface 12 of the substrate 11 to be coated while maintaining a predetermined viscosity, even if the surface 12 of the substrate 11 has minute pores or a mesh formed therein, the coating liquid 13 does not penetrate into the interior of the substrate 11, and coating films 10a-10c of a substantially uniform thickness can be formed on the surface 12 of the substrate 11.

[0043] The inorganic polysilazane is represented by the general formula (Chemical Formula 1).

[0044] [ka] Examples of inorganic polysilazanes include perhydropolysilazanes that include a linear structure having structural units, have a molecular weight of 690 to 2,000, have 3 to 10 SiH groups per molecule, and have element ratios of Si: 59 to 61, N: 31 to 34, and H: 6.5 to 7.5 by weight, as determined by chemical analysis, and have an average molecular weight in the range of 3,000 to 20,000 in terms of polystyrene.

[0045] Perhydropolysilazane contains chain and cyclic portions in its molecule and is represented by the following chemical formula (Chemical Formula 2).

[0046] [ka] An example of the structure of perhydropolysilazane is represented by the following chemical formula (Chemical Formula 3).

[0047] [ka] Another example of the perhydropolysilazane compound group is represented by the following general formula (Chemical Formula 4), which contains a Si-N bond and a functional group (R 1 ~R 3 ) and is a polymer formed from -(SiR1R2-NR3)- units, and at least one of the functional groups R1 and R2 directly bonded to Si is an organic polymer formed from an organic functional group such as an alkyl group having carbon (C).

[0048] [ka] Perhydropolysilazane is an organic compound with a functional group (R 1 ~R 3The content of methyl groups (CH3), which is one of the functional groups, is 50% or more. Furthermore, perhydropolysilazane may not only be a polymer formed from one type of -(SiR1R2-NR3)- unit, but also a polymer formed from multiple types of -(SiR1R2-NR3)- units with different compositions of functional groups (R1 to R3). Furthermore, perhydropolysilazane may be a polymer having a chain, cyclic or crosslinked structure, or may be a polymer having a combination of these structures. R 1 , R 2 , R 3 represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, or a group other than these groups in which the group directly bonded to silicon is carbon, an alkylsilyl group, an alkylamino group, or an alkoxy group. 1 , R 2 , R 3 At least one of the is a hydrogen atom.

[0049] As an example, perhydropolysilazane (A) is a compound having a -(SiH(CH3)-NH)- unit, a -(Si(CH3)2-NH)- unit, a -(SiR 1 It is a polymer containing (CH3)-NR3)- units. 1 (CH3)-NR 3 The functional group R1 in the )-unit is H or CH3, and the functional group R3 directly bonded to N is an organic functional group that promotes the reaction. The inclusion of perhydropolysilazane (A) in the coating liquid 13 promotes the reaction after the coating liquid 13 is applied to the surface 12 of the substrate 11 (molded article), and lipophilic glass-based inorganic coating films 10a to 10c or lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c can be formed on the surface 12 of the substrate 11 quickly.

[0050] [ka] Another example of perhydropolysilazane (B) is a compound having a -(SiH(CH3)-NH)- unit, a -(SiR1 A polymer containing a (CH3)-NH)-unit, -(SiR 1 The functional group R of the (CH3)-NH)-unit 1 is an organic functional group that realizes high heat resistance. By including perhydropolysilazane (B) in the coating liquid 13, the heat resistance of the lipophilic glass-based coating films 10a to 10c that coat the surface 12 of the base material 11 (molded product) can be enhanced.

[0051] [Chemical formula] The perhydropolysilazane contained in the coating liquid 13 may be a mixture of multiple types of perhydropolysilazanes with different polymer structures. For example, it may be a perhydropolysilazane in which perhydropolysilazane (A) and perhydropolysilazane (B) are mixed. According to the mixing experiments of those perhydropolysilazanes (A) and perhydropolysilazane (B), a blending ratio of 50% by mass of perhydropolysilazane (A) and 50% by mass of perhydropolysilazane (B) shows rust prevention properties equal to or better than those of perhydropolysilazane (A) alone, and a shortening of the curing time (the production time of the lipophilic glass-based coating films 10a to 10c) was confirmed as compared with perhydropolysilazane (B) alone.

[0052] The organopolysilazane has a hydrogen atom in R 1 and R 2 and an organic group in R 3 . A polysilazane having a cyclic structure with a polymerization degree of 3 to 5 with -(R 2 SiHNH)- as a repeating unit, a polysilazane having both a chain structure and a cyclic structure in a molecule represented by a chemical formula of (R 3 SiHNH) x [(R 2 SiH) 1.5 N] 1-X (0.4 < X < 1), a polysilazane having a hydrogen atom in R 1 and an organic group in R[[ID=�9]] 2 , R 3 in the above general formula (Chemical formula 4), a polysilazane having an organic group in R1 and R 2 an organic group, R 3 has a hydrogen atom in -(R 1 R 2 SiNR 3 )- as a repeating unit, there are polysilazanes that mainly have a cyclic structure with a degree of polymerization of 3 to 5.

[0053] For example, an organopolysilazane having a crosslinked structure other than that of the above general formula (Chemical Formula 4) in the molecule is represented by the following general formula (Chemical Formula 7).

[0054] [ka] Also, for example, R 1 Polysilazane R with a crosslinked structure obtained by ammonia decomposition of SiX3 (X: halogen) 1 Si(NH) x , R 1 SiX3 and R 2 The polysilazane structure obtained by co-ammoniolysis of 2SiX2 is represented by the following general formula (Chemical Formula 8).

[0055] [ka] The organopolysiloxane may be, for example, a polysiloxane having an average unit formula (A): (R 1 3SiO 1 / 2 ) a (R 1 2SiO 2 / 2 ) b (R 1 SiO 3 / 2 ) c (SiO 4 / 2 ) d There is a polymer having the average unit formula (A): 1 are each independently a monovalent organic group, and are preferably a monovalent ethylenically unsaturated group, a monovalent hydrocarbon group (excluding ethylenically unsaturated groups), or a monovalent substituted hydrocarbon group (excluding ethylenically unsaturated groups). 1The number of carbon atoms in R is preferably 1 or more and 8 or less, more preferably 1 or more and 6 or less. The monovalent substituted hydrocarbon group has a hydrocarbon group as a basic skeleton and contains at least one functional group selected from the group consisting of, for example, a hydroxy group, a mercapto group, an amino group, an isothiocyanate group, a nitro group, and a carbonyl group. 1 is preferably a monovalent ethylenically unsaturated group or a monovalent hydrocarbon group, more preferably a monovalent ethylenically unsaturated group.

[0056] Examples of the monovalent ethylenically unsaturated group include alkenyl groups such as vinyl, allyl, butenyl, pentenyl, and hexenyl. The number of carbon atoms in the alkenyl group is preferably 2 or more and 8 or less, more preferably 2 or more and 6 or less, and even more preferably 2 or more and 3 or less. Examples of the monovalent ethylenically unsaturated group include (meth)acryloyloxyalkyl groups, i.e., groups represented by the formula (B): -R 12 -OC(=O)-CR 11 There are also groups represented by =CH2. Specifically, there are acryloyloxypropyl groups and methacryloyloxypropyl groups. R in formula (B) 11 is a hydrogen atom or a methyl group, and R 12 is an alkanediyl group, preferably an alkanediyl group having 1 to 5 carbon atoms. Note that (meth)acrylic is used as a general term for acrylic and methacrylic, and (meth)acryloyl is used as a general term for acryloyl and methacryloyl.

[0057] Among the monovalent ethylenically unsaturated groups, alkenyl groups are preferred, vinyl groups and allyl groups are preferred, and vinyl groups are more preferred. Examples of monovalent hydrocarbon groups include alkyl groups such as methyl groups, ethyl groups, propyl groups, butyl groups, pentyl groups, hexyl groups, and heptyl groups; aryl groups such as phenyl groups, tolyl groups, and xylyl groups; and aralkyl groups such as benzyl groups and phenethyl groups. The number of carbon atoms in the monovalent hydrocarbon group is preferably 1 to 8, more preferably 1 to 5, and even more preferably 1 to 3.

[0058] Examples of monovalent substituted hydrocarbon groups include a 3-mercaptopropyl group (-(CH2)3-SH) and a 3-aminopropyl group (-(CH2)3-NH2). R 1 From the viewpoint of fine particle formation, each of the groups is preferably an alkyl group or an alkenyl group, more preferably an alkyl group having 1 to 3 carbon atoms, a vinyl group, or an allyl group, and even more preferably a methyl group or a vinyl group.

[0059] In one molecule of organopolysiloxane having the average unit formula (A), at least a portion of R 1 is a group containing a functional group (L) such as a monovalent ethylenically unsaturated group, an aryl group, or an aralkyl group, and is preferably a monovalent ethylenically unsaturated group, more preferably an alkenyl group. The total proportion of the monovalent ethylenically unsaturated group, aryl group, or aralkyl group is determined based on the total R in one molecule of the organopolysiloxane. 1 Based on this, it is preferably 50 mol % or more, more preferably 60 mol % or more, even more preferably 70 mol % or more, still more preferably 80 mol % or more, and particularly preferably 90 mol % or more. The monovalent ethylenically unsaturated group, aryl group, or aralkyl group is a hydrophobic group containing a nonionic functional group capable of coordinating to a metal ion.

[0060] In the average unit formula (A), a, b, c, and d represent the respective constituent units (R 1 3SiO 1 / 2 ), (R 1 2SiO 2 / 2 ), (R 1 SiO 3 / 2 ) and (SiO 4 / 2 The sum of the mole fractions of each structural unit, a, b, c, and d, is 1. a represents the average value of the mole fraction of R 1 3SiO 1 / 2 a is the mole fraction of siloxane units represented by (M units). a is 0 or more and 0.5 or less, preferably 0.4 or less, more preferably 0.3 or less, even more preferably 0.2 or less, and particularly preferably 0.1 or less.

[0061] b is R 1 2SiO2 / 2 b is the mole fraction of siloxane units represented by R (D units). b is 0 or more and 0.5 or less, preferably 0.4 or less, more preferably 0.3 or less, even more preferably 0.2 or less, and particularly preferably 0.1 or less. c is the mole fraction of siloxane units represented by R 1 SiO 3 / 2 is the mole fraction of siloxane units represented by (T units). c is 0.3 or more and 1 or less, preferably 0.4 or more, 0.5 or more, or 0.6 or more, more preferably 0.7 or more, even more preferably 0.8 or more, and particularly preferably 0.9 or more.

[0062] d is SiO 4 / 2 is the mole fraction of siloxane units represented by (Q units). d is 0 or more and 0.7 or less, preferably 0.6 or less, 0.5 or less, or 0.4 or less, more preferably 0.3 or less, even more preferably 0.2 or less, and particularly preferably 0.1 or less. The sum of c and d, which represents the total number of branched structural units, is preferably 0.6 or more, more preferably 0.7 or more, even more preferably 0.8 or more, and particularly preferably 0.9 or more.

[0063] The organopolysiloxane is a polysiloxane having a constitutional unit (R 1 3SiO 1 / 2 When the structural unit (R) in the average unit formula (A) is present, it may contain only one type of structural unit, or may contain two or more types of structural units. 1 2SiO 2 / 2 ) and (R 1 SiO 3 / 2 The same applies to the R 1 At least part of 2 In the average unit formula (A), R may be replaced by O. 2 is a hydrogen atom or an alkyl group. 2 O represents a hydroxy group or an alkoxy group bonded to a silicon atom contained in the organopolysiloxane skeleton. Examples of the alkyl group include a methyl group, an ethyl group, and a propyl group. The number of carbon atoms in the alkyl group is preferably 1 or more and 3 or less.

[0064] The above R in each of the structural units 1 At least part of 2 The amount of the structural units substituted with O is preferably 0 or more and 0.10 or less, more preferably 0 or more and 0.05 or less, and even more preferably 0 or more and 0.03 or less, relative to the sum of the molar fractions of the structural units, a, b, c, and d, which is 1. The alkoxy group in the structural unit is, for example, an alkoxy group that is a hydrolyzable group contained in an alkoxysilane described below, and remains in the molecule without undergoing hydrolysis and polycondensation. The hydroxy group in this structural unit is, for example, a hydroxy group that remains in the molecule after hydrolysis of an alkoxy group without undergoing polycondensation.

[0065] The organopolysiloxane is preferably a silsesquioxane. Silsesquioxane has a main chain skeleton consisting of Si—O bonds and a main structural unit (R 1 SiO 3 / 2 ) units, and the value of c is 0.7 or greater. Examples of the silsesquioxane structure include a random structure, a complete cage structure, an incomplete cage structure, and a ladder structure. Among these, silsesquioxanes having a random structure are preferred from the viewpoint of ease of production.

[0066] The structural unit (R 1 3SiO 1 / 2 As the alkoxysilane forming R 1 3Si(OR 2 Specific examples thereof include methoxydimethylvinylsilane, ethoxydimethylvinylsilane, methoxydimethylphenylsilane, and ethoxydimethylphenylsilane; and methoxytrimethylsilane and ethoxytrimethylsilane.

[0067] The structural unit (R 1 2SiO 2 / 2 As the alkoxysilane forming R 1 2Si(OR 2) 2. Specific examples thereof include dimethoxymethylvinylsilane, diethoxymethylvinylsilane, and dimethoxybenzylmethylsilane; as well as dimethoxydimethylsilane, dimethoxydiethylsilane, diethoxydimethylsilane, diethoxydiethylsilane, dipropoxydimethylsilane, and dipropoxydiethylsilane.

[0068] The structural unit (R 1 SiO 3 / 2 As the alkoxysilane forming R 1 Si(OR 2 )3. Specific examples thereof include trimethoxyvinylsilane, triethoxyvinylsilane, trimethoxyallylsilane, triethoxyallylsilane, (3-(meth)acryloyloxypropyl)trimethoxysilane, and (3-(meth)acryloyloxypropyl)triethoxysilane; as well as methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, and butyltrimethoxysilane. The structural unit (SiO 4 / 2 As the alkoxysilane that forms Si(OR 2 ) 4. Specific examples thereof include tetramethoxysilane, tetraethoxysilane, and tetrapropoxysilane.

[0069] The long-chain organic group-modified dimethylmethoxysilane is represented by the following general formula (Chemical Formula 9).

[0070] (9) Long-chain organic group modified dimethylmethoxysilane: C n The long-chain organic group modified dimethylmethoxysilane includes two or more types of dimethylmethoxysilanes with different carbon numbers in the organic group. Also, the long-chain organic group modified dimethylmethoxysilane includes C8 (n-octyldimethylmethoxysilane) or C 18(n-octadecyldimethylmethoxysilane). Alternatively, long-chain organic group-modified dimethylmethoxysilanes include C8 (n-octyldimethylmethoxysilane) and C 18 (n-octadecyldimethylmethoxysilane).

[0071] The lipophilic glass-based inorganic coating film 10a or the lipophilic glass-based organic / inorganic hybrid coating film 10a shown in FIG. 1 is made by adding C8 (n-octyldimethylmethoxysilane) and C 18 (n-octadecyldimethylmethoxysilane), and long-chain organic group-modified dimethylmethoxysilanes include C8 (n-octyldimethylmethoxysilane) and C 18 It is made from a coating solution 13 containing (n-octadecyldimethylmethoxysilane).

[0072] The lipophilic glass-based inorganic coating film 10b or the lipophilic glass-based organic / inorganic hybrid coating film 10b shown in FIG. 2 is made from a coating liquid 13 in which long-chain organic group-modified dimethylmethoxysilane contains C8 (n-octyldimethylmethoxysilane) and long-chain organic group-modified dimethylmethoxysilane contains C8 (n-octyldimethylmethoxysilane).

[0073] The lipophilic glass-based inorganic coating film 10c or the lipophilic glass-based organic / inorganic hybrid coating film 10c shown in FIG. 3 is formed by adding C to long-chain organic group-modified dimethylmethoxysilane. 18 (n-octadecyldimethylmethoxysilane) and long-chain organic group-modified dimethylmethoxysilane with C 18 It is made from a coating solution 13 containing (n-octadecyldimethylmethoxysilane).

[0074] C8 (n-octyldimethylmethoxysilane) shown in the image diagram of Figure 4 is represented by the following general formula (Chemical Formula 10). C8 (n-octyldimethylmethoxysilane) has lipophilicity of C 18(n-octadecyldimethylmethoxysilane), but C 18 It has higher mobility (liquid state) than (n-octadecyldimethylmethoxysilane).

[0075] [ka] C shown in the image of Figure 5 18 (n-octadecyldimethylmethoxysilane) is represented by the following general formula (Chemical Formula 11): 18 (n-Octadecyldimethylmethoxysilane) has higher lipophilicity than C8 (n-Octyldimethylmethoxysilane), but the hydrocarbon chains are densely arranged and its mobility (solid state) is low.

[0076] [ka] The long-chain organic group-modified dimethylmethoxysilane has a mass ratio of 0.1≦C₈ / (C₈+C₈). 16 )≦0.8 and C8 (n-octyldimethylmethoxysilane) 18 (n-octadecyldimethylmethoxysilane).

[0077] In addition, C 18 (n-Octadecyldimethylmethoxysilane) has a longer alkyl group and is more lipophilic than C8 (n-Octyldimethylmethoxysilane). 18 When C8 is added and cured, the alkyl groups are aligned on the air side at the interface between the air and the coating agent, and the coating agent hardens. At this time, the alkyl chains crystallize, reducing mobility and increasing the contact angle with oleic acid. Even if C8 is added to the film component and cured, 18 However, because C8 has low lipophilicity, the contact angle of oleic acid does not decrease significantly. 18 If you put both C and C8, 18 The alkyl groups of C are not adjacent to each other and do not crystallize. 18The lipophilicity of the film is effective, lowering the contact angle of oleic acid. It is also thought that this system has fine nano-sized irregularities. The uneven structure of the film surface has the effect of further enhancing the properties of the film itself, so it is thought that this irregularity is the factor that further reduces the contact angle of oleic acid.

[0078] Long-chain organic group-modified dimethylmethoxysilanes include C8 (methoxy(dimethyl)octadecylsilane n-octadecyldimethylmethoxysilane) and C 18In addition to (methoxy(dimethyl)-n-octylsilane), 1-chloromethyldimethylmethoxysilane, 1-chloromethylmethyldiethoxysilane, 1-chloromethyldimethylethoxysilane, 3-chloropropyltrimethoxysilane, 3-chloropropyltriethoxysilane, 3-chloropropyldimethoxymethylsilane, 3-chloropropylmethyldiethoxysilane, 3-chloropropyldimethylethoxysilane, 1-bromomethyltrimethoxysilane, 1-bromomethyltriethoxysilane, 1-bromomethylmethyldimethoxysilane, 1-bromomethylmethyldiethoxysilane, 1-bromomethyldimethylmethoxysilane, 1-bromomethyldimethylethoxysilane, 3-bromopropyltrimethoxysilane, 3-bromopropyltriethoxysilane, 3-bromopropylmethyldimethoxysilane, 3-bromopropylmethyldiethoxysilane, 3-bromopropyldimethylethoxysilane, 3-chloropropyltrioctoxysilane, 3-chloropropylmethyl Dioctoxysilane, 3-chloropropyltrihexaoxysilane, 3-chloropropylmethyldihexaoxysilane, 3-chloropropyltridecaoxysilane, 3-chloropropylmethyldecaoxysilane, 3-chloropropyltrioctadecaoxysilane, 3-chloropropylmethyldioctadecaoxysilane, 3-chloropropylethoxydiethyleneglycoxysilane, 3-chloropropylmethyldiethyleneglycoxysilane, reaction products of 3-chloropropyltrimethoxysilane with polyethylene glycol (repeating units 1-8) monobutyl ether, reaction products of 3-chloropropyltrimethoxysilane with polyethylene glycol (repeating units 1-8) monoethyl ether, reaction products of 3-chloropropyltrimethoxysilane with polyethylene glycol (repeating units 1-8) monomethyl ether, reaction products of 3-chloropropyltrimethoxysilane with 2-methyl-1,3-propanediol, reaction products of 3-chloropropyltrimethoxysilane with 2,2-dimethyl-1,The solvent may include one or more of a reaction product of 3-propanediol, a reaction product of 3-chloropropyltrimethoxysilane and N-methyldiethanolamine, a reaction product of 3-chloropropyldimethoxymethylsilane and N-methyldiethanolamine, a reaction product of 3-chloropropyltrimethoxysilane and N-butyldiethanolamine, a reaction product of 3-chloropropyldimethoxymethylsilane and N-butyldiethanolamine, 3-chloropropylsilatrane, and 3-chloromethylsilatrane.

[0079] The solvent used is dibutyl ether, which has the molecular formula C8H 18 It is a compound belonging to ethers represented by the formula O. As the solvent, one or more of the following can be used: ketones such as methyl ethyl ketone (2-butanone), methyl isobutyl ketone (4-methyl-2-pentanone), and cyclohexanone; glycol derivatives (ether compounds, ester compounds, ether ester compounds, etc.) such as PGMEA (2-acetoxy-1-methoxypropane), ethylene glycol mono-n-butyl ether, ethylene glycol monoethyl ether, and ethylene glycol ethyl ether acetate; amides such as N,N-dimethylacetamide; esters such as ethyl acetate, propyl acetate, and butyl acetate; pyrrolidones such as N-methyl-pyrrolidone (specifically, 1-methyl-2-pyrrolidone); aromatic hydrocarbons such as toluene and xylene; aliphatic hydrocarbons such as cyclohexane and heptane; and ethers such as tetrahydrofuran, dioxane, diethyl ether, and dibutyl ether.

[0080] The coating liquid 13 contains polysilazanes (such as perhydropolysilazane, organopolysilazane, and organopolysiloxane) in a content ranging from 1% to 15% by mass relative to 100% by mass of the coating liquid. If the polysilazane content is less than 1% by mass, the polysilazane content in the coating liquid 13 is low, making it impossible to form inorganic coating films 10a-10c with excellent flexibility, impact resistance, and corrosion resistance on the surface 12 of the substrate 11. If the polysilazane content exceeds 15% by mass, the viscosity of the coating liquid 13 increases more than necessary, resulting in the thicknesses of the inorganic coating films 10a-10c becoming larger than necessary, making it impossible to form the inorganic coating films 10a-10c with the planned thickness on the surface 12 of the substrate 11. Since the coating liquid 13 contains polysilazane in an amount falling within the above range, the coating liquid 13 can be used to form inorganic coating films 10a to 10c on the surface 12 of the substrate 11, which have excellent flexibility, impact resistance, and corrosion resistance, and have the planned thickness.

[0081] The content of long-chain organic group-modified dimethylmethoxysilane contained in the coating liquid 13 is in the range of 1% by mass or more and 15% by mass or less, relative to 100% by mass of the coating liquid. If the content of long-chain organic group-modified dimethylmethoxysilane is less than 1% by mass, the inorganic coating films 10a-10c formed from the coating liquid 13 will not exhibit sufficient lipophilicity. Because the content of long-chain organic group-modified dimethylmethoxysilane contained in the coating liquid 13 is in the above range, the coating liquid 13 can be used to form inorganic coating films 10a-10c having excellent lipophilicity on the surface 12 of the substrate 11.

[0082] In the coating liquid 13, the content rate of the solvent contained therein is in the range of 70% by mass or more and 98% by mass or less with respect to 100% by mass of the coating liquid. When the blending ratio of the solvent is less than 70% by mass, the viscosity of the coating liquid 13 becomes high, and the film thicknesses of the inorganic coating films 10a to 10c formed from the coating liquid 13 become larger than necessary, and it is impossible to form the inorganic coating films 10a to 10c with the planned film thickness on the surface 12 of the base material 11. Since the content rate of the solvent contained in the coating liquid 13 is within the above range, using the coating liquid 13, it is possible to form inorganic coating films 10a to 10c with an appropriate viscosity and a planned film thickness having excellent flexibility, impact resistance, and corrosion resistance on the surface 12 of the base material 11.

[0083] The coating liquid 13 is coated or sprayed on the surface 12 of the base material 11 to be coated, and reacts with moisture to form (film-form) monolayer or multilayer ultra-thin film lipophilic glass-based coating films 10a to 10c. Incidentally, the lipophilic glass-based coating films 10a to 10c are formed as films having an average film thickness in the range of 0.2 μm or more and 20 μm or less, preferably in the range of 0.5 μm or more and 20 μm or less.

[0084] <​​​​​​If the temperature exceeds this range, the thickness of the lipophilic glass-based coating films 10a to 10c will increase more than necessary, and the coating films 10a to 10c will lose their flexibility.

[0085] As a pre-treatment step prior to the coating step with the coating liquid 13, water (H2O) such as purified water may be sprayed onto the surface 12 of the substrate 11 to adhere the water to the surface 12 of the substrate 11. By doing so, a chemical reaction between the water adhered to the surface 12 of the substrate 11 and the components contained in the coating liquid 13 is promoted, and lipophilic glass-based coating films 10a-10c can be rapidly formed on the surface 12 of the substrate 11, and strong coating films 10a-10c can be formed on the surface 12 of the substrate 11.

[0086] As a pretreatment step prior to the coating step of the coating liquid 13, a coating liquid containing inorganic polysilazane as a main component can be coated as a primer on the surface 12 of the substrate 11. For example, when a solution of inorganic polysilazane (1 wt % solution) is coated and then the coating liquid 13 is coated, the rust prevention properties (durability) of the lipophilic glass-based coating films 10a to 10c are improved compared to when only the coating liquid 13 is simply coated.

[0087] The mechanism by which lipophilic glass-based inorganic coating films 10a-10c and lipophilic glass-based organic / inorganic hybrid coating films 10a-10c are formed on surface 12 of substrate 11 will be explained below with reference to Figure 6. In forming (forming) lipophilic glass-based inorganic coating films 10a-10c, surface 12 of substrate 11 is coated with coating liquid 13 in a coating process, and then surface 12 of substrate 11 is heated to 400°C or higher while being irradiated with ultraviolet light.

[0088] In forming (depositing) the lipophilic glass-based organic / inorganic hybrid coating films 10a-10c, the surface 12 of the article 11 is coated with the coating liquid 13 in the coating process, and then the surface 12 of the article 11 is left at room temperature (normal temperature) without being heated. Alternatively, the surface 12 of the article 11 is coated with the coating liquid 13, and then the surface 12 of the article 11 is irradiated with ultraviolet light while being left at room temperature (normal temperature). Alternatively, the surface 12 of the article 11 is coated with the coating liquid 13, and then the surface 12 of the article 11 is irradiated with ultraviolet light while being irradiated with infrared light to heat the temperature of the surface 12 of the article 11 to less than 400°C.

[0089] As shown in Figure 6(a), a small amount of moisture (water droplets) adheres to the surface 12 of the substrate 11 due to condensation or humidity in the air (including when water (HO) is sprayed). When the surface 12 of the substrate 11 is coated with a coating liquid 13 in a thin film form by a coating process, the unit components constituting the polysilazane (perhydropolysilazane, organopolysilazane, organopolysiloxane, etc.) contained in the coating liquid 13 chemically react with the moisture (HO) in the air, thereby forming on the surface 12 of the substrate 11 an oleophilic glass-based inorganic coating film 10a-10c (glass coating layer (amorphous glass coating)) having an organic composite structure (-(Si(CH3)2-O-Si(CH3)2)- unit in the structural image of the inorganic coating films 10a-10c shown in Figure 7) in which organic functional groups are bonded as side chains to part of the main chain formed by siloxane bonds (Si-O-Si). The inorganic coating films 10a to 10c are approximately 100% vitrified (inorganized).

[0090] Furthermore, the unit components that make up the polysilazanes (perhydropolysilazane, organopolysilazane, organopolysiloxane, etc.) contained in the coating liquid 13 chemically react with moisture (H2O) in the air to produce lipophilic glass-based organic / inorganic hybrid coating films 10a-10c on the surface 12 of the substrate 11. These films have an organic composite structure (the -(Si(CH3)2-O-Si(CH3)2)- unit in the structural image of the organic / inorganic hybrid coating films 10a-10c shown in Figure 8) in which organic functional groups are attached as side chains to part of the main chain formed by siloxane bonds (Si-O-Si). While trace amounts of gases (NH3, H2) are generated as by-products of this chemical reaction, these gases volatilize (emit) into the atmosphere without remaining on the surface 12 of the substrate 11.

[0091] As shown in Figure 6(b), polysilazanes (perhydropolysilazane, organopolysilazane, organopolysiloxane, etc.), C8 (n-octyldimethylmethoxysilane) and C 18 The coating liquid 13, which is formed from a solvent and a long-chain organic group-modified dimethylmethoxysilane containing (n-octadecyldimethylmethoxysilane), undergoes a chemical reaction (deammonia cross-linking) with the moisture contained in the air in the surface layer 14 that comes into contact with the air, causing gases such as hydrogen and ammonia, which are by-products of the coating films 10a to 10c, to volatilize from the surface 12 of the substrate 11 into the outside air, and a glass coating layer 15 is formed (produced) on the surface 12 side of the substrate 11 of the coating films 10a to 10c.

[0092] The coating liquid 13 coated on the surface 12 of the substrate 11 undergoes a chemical reaction (deammonia cross-linking) with the moisture (water droplets) adhering to the surface 12 of the substrate 11 or the hydroxyl groups -OH present as terminal ends on the surface 12 of the substrate 11 in the back layer 16 in contact with the surface 12 of the substrate 11, causing gases such as hydrogen and ammonia to rise within the coating layer and volatilize from the surface 12 of the substrate 11 into the outside air, and a glass coating layer 15 is formed (generated) on the back side of the coating films 10a to 10c.

[0093] First, a coating layer 15 (a vitrified (inorganized) portion, or a vitrified (inorganized) portion and an organic portion) is generated on the surface layer 14 and the back layer 16 of the coating liquid 10. Next, the coating layer 15 is formed and expanded from the surface layer side toward the back layer side, and also from the back layer side toward the surface layer 14 side, so that the coating layer 15 is successively formed (generated) on the intermediate layer 17, and finally, inorganic coating films 10a to 10c or organic / inorganic hybrid coating films 10a to 10c are formed (generated) on the surface layer 14 in contact with the outside air, the back layer 16 in contact with the surface 12 of the article 11, and the intermediate layer 17 between the surface layer 14 and the back layer 16.

[0094] The inorganic coating films 10a to 10c are glass coating layers that are approximately 100% vitrified (inorganized). The organic / inorganic hybrid coating films 10a to 10c are formed from a glass coating layer (amorphous glass coating layer) and an organic coating layer. The inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c are mainly composed of SiO2 produced by reacting polysilazanes (perhydropolysilazane, organopolysilazane, organopolysiloxane), forming a glass coating layer that is easily spread in a plane and has high density and high hardness (vertical hardness of approximately 6H to 9H), resulting in an ultra-thin film structure at the nano level.

[0095] The inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c are formed as ultrathin films at the nanometer level because the coating liquid 13 contains polysilazanes (perhydropolysilazane, organopolysilazane, organopolysiloxane). Their thicknesses range from 5 nm to 1 μm, and preferably from 50 nm to 500 nm. Despite being primarily composed of SiO, the inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c have excellent flexibility. This, combined with the anchoring effect of the anchor portions 36, prevents peeling even when the surface 12 of the substrate 11 is made of a deforming material such as a cloth or nonwoven fabric. The coating films 10a-10c can maintain their coating state by adapting to the deformation of the surface 12 of the substrate 11.

[0096] As shown in the structural image of inorganic coating films 10a-10c in Figure 7 and the structural image of organic / inorganic hybrid coating films 10a-10c in Figure 8, a crosslinking reaction occurs between the hydrolysis product having -(Si(OH)2-O-Si(OH)2)- units and a portion of the main chain formed by siloxane bonds (Si-O-Si) in each coating layer (surface layer 14, intermediate layer 17, back surface layer 16), forming a crosslinked structure, resulting in inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c with a dense and flexible structure. The formation of the crosslinked structure allows hydrophobic methyl groups (CH3) derived from polysilazanes (perhydropolysilazane, organopolysilazane, organopolysiloxane) and hydrophilic hydroxyl groups (OH) derived from the hydrolysis product to be coordinated on the surface of inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c.

[0097] 6(c), the surface 12 of the substrate 11 before being coated with the inorganic coating films 10a-10c or the organic / inorganic hybrid coating films 10a-10c has many microscopic irregularities formed due to small scratches and the like caused during the manufacturing process, etc., unless a special surface treatment such as mirror finishing is performed. When the coating liquid 13 is coated onto the surface 12 of the substrate 11 and hardens while penetrating into the irregularities, the anchor portions 18 of the coating films 10a-10c that have hardened and penetrated into the irregularities exert an anchor effect, and the coating films 10a-10c adhere more firmly to the surface 12 of the substrate 11.

[0098] If the surface 12 of the substrate 11 is a smooth surface without any irregularities, the surface 12 of the substrate 11 may be roughened as a pretreatment before coating with the coating liquid 13, thereby forming irregularities with an average roughness of approximately 1 to 500 μm on the surface 12 of the substrate 11. By performing the roughening treatment in this manner, the anchoring effect of the anchor portions 18 of the coating films 10a to 10c can be obtained. After the roughening treatment, a cleaning treatment is performed using an air injection means such as an air gun to blow away metal powder, plastic powder, etc. that has occurred on the surface 12 of the substrate 11. After the cleaning treatment, by leaving it for a predetermined time, condensation or the like occurs on the surface 12 of the substrate 11, allowing natural moisture to adhere.

[0099] In this case, after roughening and cleaning the surface 12 of the substrate 11, moisture is actively applied to the surface 12 of the substrate 11, on which the roughening has formed irregularities, using a moisture-applying means such as a sprayer, and then the coating liquid 13 is coated. This promotes a chemical reaction between the moisture applied to the surface 12 of the substrate 11 and the coating liquid 13 in contact with the surface 12 of the substrate 11. Moisture may also be applied to the surface 12 of the substrate 11 using a moisture-applying means without roughening the surface 12 of the substrate 11. Because the irregularities initially formed on the surface 12 of the substrate 11 before being coated with the inorganic coating films 10a-10c or the organic / inorganic hybrid coating films 10a-10c are covered by the coating films 10a-10c, the surface 12 of the substrate 11 is smoother after being coated with the coating films 10a-10c than before.

[0100] The inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c are formed by adding C8 (n-octyldimethylmethoxysilane) or C 18By including n-octadecyldimethylmethoxysilane, the inorganic coating films 10a-10c have excellent oleophilicity and a high affinity between the surface and oil, causing the oil to spread out rather than forming droplets. Therefore, by forming the inorganic coating films 10a-10c or the organic / inorganic hybrid coating films 10a-10c on the surface 12 of the substrate 11, even if a person's finger touches the surface 12 of the substrate 11 and fingerprints (oil) from the finger are deposited on the surface 12 of the substrate 11, the oleophilicity of the surfaces of the coating films 10a-10c prevents the fingerprints (oil) from rising on the surfaces of the coating films 10a-10c, and the fingerprints (oil) are flattened on the surface 12 of the substrate 11 (the surfaces of the coating films 10a-10c). This makes the fingerprints (oil) on the surface 12 of the substrate 11 less visible, making them less noticeable on the surface 12 of the substrate 11.

[0101] Substrates on which lipophilic glass-based inorganic coating films 10a-10c or lipophilic glass-based organic / inorganic hybrid coating films 10a-10c can be formed include glass, metal, and plastic. The inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c made from a coating liquid 13 are formed on the glass surface. Glass on which the inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c can be formed includes all currently manufactured glass types, such as float glass, tempered glass, insulating glass, heat-shielding glass, low-reflection glass, laminated glass, high-transmittance glass, designer glass, film glass, and heat-resistant glass, as well as all glass types developed in the future. Glass is processed into glass molded products in the shape of plates, rods, columns, and various other three-dimensional shapes, and coating films 10a-10c are formed on the surfaces of the various glass molded products.

[0102] By forming inorganic coating films 10a to 10c or organic / inorganic hybrid coating films 10a to 10c on surface 12 of glass (molded glass product), even if a person's fingerprints (oil) adhere to glass surface 12, the lipophilicity of the surfaces of coating films 10a to 10c flattens the fingerprints (oil) on the glass surface, making the fingerprints (oil) on glass surface 12 less visible, and the fingerprints (oil) become less noticeable on glass surface 12.

[0103] On a metal surface 12, inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10cc made from a coating liquid 13 are formed. Metals that form inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c include all currently produced metals such as iron, aluminum, duralumin, stainless steel, copper, gold, silver, titanium, nickel, various steels, various alloys, various non-ferrous metals, and various non-ferrous alloys, as well as all metals that will be developed in the future. The metals are processed into metal molded products in the shape of plates, rods, columns, and various other three-dimensional shapes, and coating films 10a-10c are formed on the surfaces of the various metal molded products.

[0104] By forming inorganic coating films 10a to 10c or organic / inorganic hybrid coating films 10a to 10c on the surface 12 of a metal (metal molded product), even if a person's fingerprints (oil) adhere to the metal surface 12, the lipophilicity of the surfaces of the coating films 10a to 10c flattens the fingerprints (oil) on the metal surface 12, making it difficult to clearly see the fingerprints (oil) on the metal surface 12, and making the fingerprints (oil) less noticeable on the metal surface 12.

[0105] On the plastic surface 12, inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c made from a coating liquid 13 are formed. Examples of plastics that can form the inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c include known thermoplastic resins such as polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyamide (nylon), vinyl chloride resin, acrylic resin, silicone resin, fluororesin, polyimide resin, and polysulfone resin, as well as thermosetting resins such as epoxy resin, melamine resin, phenolic resin, and unsaturated polyester resin. Plastics are processed into plastic molded products in various three-dimensional shapes, such as films, sheets, plates, and columns, and coating films 10a-10c are formed on the surfaces of the various plastic molded products. By forming inorganic coating films 10a to 10c or organic / inorganic hybrid coating films 10a to 10c on the surface of plastic (plastic molded product), even if a person's fingerprints (oil) adhere to the plastic surface, the lipophilicity of the surfaces of the coating films 10a to 10c flattens the fingerprints (oil) on the plastic surface, making it difficult to clearly see the fingerprints (oil) on the plastic surface 12, and making the fingerprints (oil) less noticeable on the plastic surface 12.

[0106] When lipophilic glass-based inorganic coating films 10a to 10c or lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c are formed on glass, metal, or plastic, human fingerprints adhering to the surface of the glass, metal, or plastic become flat on the surface of the glass, metal, or plastic on which lipophilic glass-based inorganic coating films 10a to 10c or lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c are formed, and coating films 10a to 10c have an excellent effect of concealing fingerprints adhering to these surfaces, thereby reliably making fingerprints adhering to the surface of the glass, metal, or plastic less noticeable.

[0107] An example of a substrate on which the lipophilic glass-based inorganic coating films 10a-10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a-10c are formed is an electronic device. The inorganic coating films 10a-10c or the organic / inorganic hybrid coating films 10a-10c made from a coating liquid 13 are formed on the glass surface of the electronic device, the metal surface of the electronic device, the plastic surface of the electronic device, and the glossy black surface of the electronic device. The glossy black surface is a portion of the electronic device that mirror-reflects black and appears shiny and glossy.

[0108] Electronic devices include smartphones, personal computers, tablets, car navigation systems, digital signage, televisions, and home appliances equipped with displays and touch panels. Electronic devices also include all devices developed in the future. Inorganic coating films 10a-10c or organic / inorganic hybrid coating films 10a-10c are formed on the glass, metal, plastic, and glossy black surfaces of these electronic devices.

[0109] Even if a person's fingerprints (oil) adhere to the surface of the glass part of each electronic device, the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c makes the fingerprints (oil) flat on the surface 12 of the glass part of each electronic device, making it difficult to clearly see the fingerprints (oil) on the surface 12 of the glass part of each electronic device, and the fingerprints (oil) become less noticeable on the surface 12 of the glass part.

[0110] Even if a person's fingerprints (oil) adhere to the surface of the metal part of each electronic device, the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c makes the fingerprints (oil) flat on the surface 12 of the metal part of each electronic device, making it difficult to clearly see the fingerprints (oil) on the surface 12 of the metal part of each electronic device, and the fingerprints (oil) become less noticeable on the surface 12 of the metal part.

[0111] Even if a person's fingerprints (oil) adhere to the surface of the plastic part of each electronic device, the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c makes the fingerprints (oil) flat on the surface 12 of the plastic part of each electronic device, making it difficult to clearly see the fingerprints (oil) on the surface 12 of the plastic part of each electronic device, and the fingerprints (oil) become less noticeable on the surface 12 of the plastic part.

[0112] Even if a person's fingerprints (oil) adhere to the surface of the black glossy portion of each electronic device, the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c causes the fingerprints (oil) to become flat on the surface 12 of the black glossy portion of each electronic device, making it difficult to clearly see the fingerprints (oil) on the surface 12 of the black glossy portion of each electronic device, and making the fingerprints (oil) less noticeable on the surface 12 of the black glossy portion.

[0113] The lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c can be formed on the glass parts, metal parts, plastic parts, and glossy black parts of the electronic devices without much effort and at low cost. Fingerprints adhering to the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the electronic devices become flat on the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the electronic devices on which the lipophilic glass-based coating films are formed. The coating films 10a to 10c have an excellent effect of concealing fingerprints adhering to the surfaces of the electronic devices, and fingerprints adhering to the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the electronic devices can be reliably made inconspicuous.

[0114] The glass parts, metal parts, plastic parts, and glossy black parts of these electronic devices are coated with lipophilic glass-based inorganic coating films 10a-10c or lipophilic glass-based organic / inorganic hybrid coating films 10a-10c, which have excellent strength and excellent scratch resistance. This makes it possible to smooth the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the electronic devices on which coating films 10a-10c are formed, and also to protect the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the electronic devices on which coating films 10a-10c are formed, thereby preventing scratches on these surfaces.

[0115] Substrates on which the lipophilic glass-based inorganic coating films 10a-10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a-10c are formed include buildings and building components. The inorganic coating films 10a-10c or the organic / inorganic hybrid coating films 10a-10c made from the coating liquid 13 are formed on the glass surfaces of the buildings and building components, the metal surfaces of the buildings and building components, the plastic surfaces of the buildings and building components, and the glossy black surfaces of the buildings and building components.

[0116] Structures include buildings and certain associated structures, as well as man-made structures other than buildings. Structures include structures for viewing, offices, stores, theaters, warehouses, and other similar facilities located in underground or elevated structures, building equipment, civil engineering structures such as bridges and water gates, construction materials (mortar, concrete, ALC, siding boards, extruded cement boards, gypsum boards, slate, wood, PC boards, etc.), and furniture and fixtures. Structures also include all future developments. Components that make up structures include window glass, doors, handrails, handles, operating buttons attached to the structure, and displays or touch panels attached to the structure.

[0117] Buildings include wood (W), aluminum (AL), light steel (S), heavy steel (S), reinforced concrete (RC), steel-reinforced concrete (SRC), concrete-filled steel tube (CFT), and concrete block (CB).Structures include chimneys, towers, elevated water tanks, and similar structures, bridges, elevated roads, elevated railways, and similar structures, manufacturing facilities, storage facilities, water and electricity supply facilities, waste disposal facilities, and similar structures, sports facilities such as baseball fields and tennis courts, amusement facilities such as amusement parks, and similar structures.

[0118] Furniture and equipment include Japanese furniture, sashimi, chests of drawers, dressing tables, Japanese desks, low tables, low desks, water closets, fly screens, bamboo furniture, rattan furniture, porcelain furniture, veneer boards, spatula stands, ironing boards, Western furniture, tables, chairs, reception sets, marine furniture, school furniture, beds, radio / TV / stereo cabinets, sewing machine tables, cupboards, bookshelves, hospital furniture, medicine shelves, metal furniture, metal cabinets, metal lockers, metal chairs, metal beds, metal tables, metal storage cabinets and cupboards, etc.

[0119] Even if a person's fingerprints (oil) adhere to the surface of the glass part of each building or a component that constitutes each building, the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c makes the fingerprints (oil) flat on the surface 12 of the glass part of each building or a component that constitutes each building, and the fingerprints (oil) adhered to the surface 12 of the glass part of each building or a component that constitutes each building becomes difficult to see clearly, and the fingerprints (oil) become less noticeable on the surface 12 of the glass part.

[0120] Even if a person's fingerprints (oil) adhere to the surfaces of the metal parts of each building and the components that make up each building, the lipophilicity of the surfaces of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c makes the fingerprints (oil) flat on the surfaces 12 of the metal parts of each building and the components that make up each building, making the fingerprints (oil) on the surfaces 12 of the metal parts of each building and the components that make up each building difficult to see clearly, and the fingerprints (oil) become less noticeable on the surfaces 12 of the metal parts.

[0121] Even if human fingerprints (oil) adhere to the surfaces of the plastic parts of each building and the components that make up each building, the lipophilicity of the surfaces of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c makes the fingerprints (oil) flattened on the surfaces 12 of the plastic parts of each building and the components that make up each building, making the fingerprints (oil) on the surfaces 12 of the plastic parts of each building and the components that make up each building difficult to see clearly, and the fingerprints (oil) become less noticeable on the surfaces 12 of the plastic parts.

[0122] Even if a human fingerprint (oil) adheres to the surface of the glossy black portion of each building or a component constituting each building, the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c makes the fingerprint (oil) flat on the surface 12 of the glossy black portion of each building or a component constituting each building, and the fingerprint (oil) adhered to the surface 12 of the glossy black portion of each building or a component constituting each building becomes difficult to clearly see, and the fingerprint (oil) becomes inconspicuous on the surface 12 of the glossy black portion.

[0123] The lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c can be formed without effort or at low cost on the glass parts of the buildings and the components that make up the buildings, the metal parts of the buildings and the components that make up the buildings, the plastic parts of the buildings and the components that make up the buildings, and the glossy black parts of the buildings and the components that make up the buildings. Fingerprints adhering to the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the buildings and the components that make up the buildings are flattened on the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the buildings and the components that make up the buildings on which the lipophilic glass-based coating films are formed, and the coating films 10a to 10c have an excellent effect of concealing fingerprints adhering to the surfaces of the buildings and the components that make up the buildings, so that fingerprints adhering to the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the buildings and the components that make up the buildings can be reliably made inconspicuous.

[0124] The glass, metal, plastic, and black glossy parts of these structures and the components that make up these structures are coated with lipophilic glass-based inorganic coating films 10a-10c or lipophilic glass-based organic / inorganic hybrid coating films 10a-10c, which have excellent strength and excellent scratch resistance. This makes it possible to smooth the surfaces of the glass, metal, plastic, and black glossy parts of these structures and the components that make up these structures, on which coating films 10a-10c are formed, and to protect the surfaces of the glass, metal, plastic, and black glossy parts of these structures and the components that make up these structures, on which coating films 10a-10c are formed, and to prevent scratches on these surfaces.

[0125] FIG. 9 shows the C of a soda lime glass substrate and a single crystal silicon substrate on which an oleophilic glass-based inorganic coating film 10a to 10c or an oleophilic glass-based organic / inorganic hybrid coating film 10a to 10c is formed. 18 / (C8+C 18) and the contact angle (°) with oleic acid, and FIG. 10 is a diagram showing the relationship between the water contact angle (°) and a soda lime glass substrate on which an oleophilic glass-based inorganic coating film 10a to 10c or an oleophilic glass-based organic / inorganic hybrid coating film 10a to 10c is formed.

[0126] The contact angles (°) of oleic acid shown in Figure 9 were measured according to JIS R 3257. The tip of a needle (needle size 22G) was placed in contact with the soda-lime glass substrate and the single-crystal silicon substrate, and a 1.0 μL drop of oleic acid was dispensed onto the top surfaces of the soda-lime glass substrate and the single-crystal silicon substrate. After the oleic acid was dispensed onto the top surfaces of the soda-lime glass substrate and the single-crystal silicon substrate and the oleic acid landed on the top surfaces of the substrates, we waited 60 seconds for the oleic acid to stabilize on the top surfaces of the substrates. Next, the oleic acid on the top surfaces of the soda-lime glass substrate and the single-crystal silicon substrate was photographed with a camera, and the contact angles of the oleic acid on the substrates were calculated using the θ / 2 method (θ = 2 arctan h / r).

[0127] The contact angles (°) shown in Figure 10 were measured with reference to JIS R 3257. The tip of a needle (needle size 18G) was brought into contact with the soda-lime glass substrate, and a 1.0 μL drop of water was dispensed onto the top surface of the soda-lime glass substrate from above the needle. After the water was dispensed onto the top surface of the soda-lime glass substrate and landed on the top surface of the plate, a wait of 5 seconds was performed until the water stabilized on the top surface of the plate. Next, the water that had landed on the top surface of the soda-lime glass substrate was photographed with a camera, and the contact angle of water on the plate was calculated using the θ / 2 method (θ = 2 arctan h / r).

[0128] As shown in Figure 9, C 18 / (C8+C 18 ) is 0.1, the contact angle (°) of oleic acid is 5 (°), C 18 / (C8+C 18 ) is 0.2, the contact angle (°) of oleic acid is 4 (°), C 18 / (C8+C 18 ) is 0.3, the contact angle (°) of oleic acid is 4.5 (°), C 18 / (C8+C18 ) is 0.5, the contact angle (°) of oleic acid is 5 (°), C 18 / (C8+C 18 ) is 0.7, the contact angle (°) of oleic acid is 7 (°), C 18 / (C8+C 18 When the contact angle (°) of oleic acid is 0.8, the contact angle (°) of oleic acid is 8 (°). 18 / (C8+C 18 ) is 0.1≦C 18 / (C8+C 18 9, the lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c have excellent lipophilicity.

[0129] As shown in Figure 10, C 18 / (C8+C 18 ) is 0.1 to 1.0, the water contact angle (°) exceeds 90 (°), and it was found that the lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c exhibit high water repellency.

[0130] The lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c are produced by applying a coating liquid containing polysilazane (perhydropolysilazane, organopolysilazane, organopolysiloxane, etc.), long-chain organic group-modified dimethylmethoxysilane, and a solvent to the surface of a substrate (glass, metal, plastic) and drying the coating liquid. The lipophilicity is such that the contact angle of approximately 1 μL of oleic acid is 20° or less, preferably 10° or less, so that the coating film can be formed on the surface of the substrate without much effort and at low cost. The lipophilicity of the coating film due to the long-chain organic group-modified dimethylmethoxysilane means that fingerprints adhering to the substrate are flattened on the surface of the substrate on which the coating film is formed, thereby providing an excellent fingerprint concealing effect and making fingerprints adhering to the surface of the substrate less noticeable.

[0131] The lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c have excellent strength and excellent scratch resistance, and can smooth the surface of a substrate (glass, metal, plastic) on which the inorganic coating film or organic / inorganic hybrid coating film is formed, thereby preventing scratches on the surface of the substrate on which the inorganic coating film or organic / inorganic hybrid coating film is formed.

[0132] The lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c are formed by adding C8 (n-octyldimethylmethoxysilane) and / or C 18 (n-octadecyldimethylmethoxysilane), and the mass ratio of the long-chain organic group-modified dimethylmethoxysilane is: 0.1≦C 18 / (C8+C 18 )≦0.8 and C8 (n-octyldimethylmethoxysilane) 18 Since (n-octadecyldimethylmethoxysilane) is contained in the long-chain organic group-modified dimethylmethoxysilane, the mobility and lipophilicity of the coating films 10a to 10c can be increased, and lipophilicity can be reliably imparted to the coating films 10a to 10c.

[0133] When the lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c are formed on the surfaces of glass, metal, or plastic, fingerprints adhering to the glass, metal, or plastic surface become flat on the glass, metal, or plastic surface on which the lipophilic glass-based coating film has been formed, and the coating film has an excellent effect of concealing fingerprints adhering to these surfaces, thereby reliably making fingerprints adhering to the glass, metal, or plastic surface less noticeable.

[0134] In electronic devices (smartphones, personal computers, tablets, car navigation systems, digital signage, televisions, or home appliances equipped with displays or touch panels) having formed thereon lipophilic glass-based inorganic coating films 10a-10c or lipophilic glass-based organic / inorganic hybrid coating films 10a-10c, coating films 10a-10c can be formed on the glass, metal, plastic, or glossy black parts of the electronic devices without much effort or cost. Fingerprints adhering to the surfaces of the glass, metal, plastic, or glossy black parts of the electronic devices are flattened on the surfaces of the glass, metal, plastic, or glossy black parts of the electronic devices having coating films 10a-10c formed thereon, and coating films 10a-10c have an excellent effect of concealing fingerprints adhering to the surfaces of the electronic devices, thereby reliably making fingerprints adhering to the surfaces of the glass, metal, plastic, or glossy black parts of the electronic devices less noticeable.

[0135] In an electronic device having formed thereon lipophilic glass-based inorganic coating films 10a to 10c or lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c, the glass parts, metal parts, plastic parts, and glossy black parts are covered with a lipophilic glass-based coating film having excellent strength and excellent scratch resistance. Therefore, the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the electronic device having the coating film formed thereon can be smoothed, and the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the electronic device having the coating film formed thereon can be protected, preventing scratches on these surfaces.

[0136] The structures and components constituting the structures (window glass, doors, handrails, handles, operation buttons attached to the structures, displays or touch panels attached to the structures) on which the lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c are formed can be applied to glass parts of the structures and components constituting the structures, metal parts of the structures and components constituting the structures, plastic parts of the structures and components constituting the structures, and glossy black parts of the structures and components constituting the structures without any effort and at low cost. Thus, human fingerprints adhering to the surfaces of the glass, metal, plastic and black glossy parts of the building and the components that make up the building become flat on the surfaces of the glass, metal, plastic and black glossy parts of the building and the components that make up the building on which the coating films 10a to 10c are formed, and the lipophilic glass-based coating films 10a to 10c have an excellent effect of concealing fingerprints adhering to those surfaces of the building, making it possible to reliably make fingerprints adhering to the surfaces of the glass, metal, plastic and black glossy parts of the building and the components that make up the building less noticeable.

[0137] In buildings and building components on which lipophilic glass-based inorganic coating films 10a-10c or lipophilic glass-based organic / inorganic hybrid coating films 10a-10c are formed, the glass, metal, plastic, and glossy black portions are coated with lipophilic glass-based coating films 10a-10c, which have excellent strength and scratch resistance. This makes it possible to smooth the surfaces of the glass, metal, plastic, and glossy black portions of buildings and building components on which coating films 10a-10c are formed, and to protect the surfaces of the glass, metal, plastic, and glossy black portions of buildings and building components on which coating films 10a-10c are formed, thereby preventing scratches on these surfaces. [Explanation of symbols]

[0138] 10a Lipophilic glass-based inorganic coating film, Lipophilic glass-based organic / inorganic coating film 10b Lipophilic glass-based inorganic coating film, Lipophilic glass-based organic / inorganic coating film 10c Lipophilic glass-based inorganic coating film, Lipophilic glass-based organic / inorganic coating film 11 Base material 12 sides 13 Coating liquid 14 Surface layer 15 Covering layer 16 Back layer 17 Middle Class 18 Anchor part

Claims

1. A lipophilic glass-based coating film is formed by applying a coating liquid containing polysilazane, long-chain organic group-modified dimethylmethoxysilane, and a solvent to the surface of a substrate and then drying the coating liquid, and the lipophilicity of the coating film is such that the contact angle of approximately 1 μl of oleic acid at room temperature is 20° or less.

2. 2. The lipophilic glass-based coating film according to claim 1, wherein the contact angle of said oleic acid is 10 degrees or less.

3. 2. The lipophilic glass-based coating film according to claim 1, wherein the polysilazane forming the coating film is an inorganic polysilazane, and the lipophilic glass-based coating film is an inorganic coating film or an organic / inorganic hybrid coating film.

4. 2. The lipophilic glass-based coating film according to claim 1, wherein the long-chain organic group-modified dimethylmethoxysilane forming the coating film contains two or more types of organic groups having different carbon numbers.

5. The long-chain organic group-modified dimethylmethoxysilane contains C ８ (n-octyldimethylmethoxysilane) or C １８ 5. The lipophilic glass-based coating film according to claim 4, which contains n-octadecyldimethylmethoxysilane.

6. The long-chain organic group-modified dimethylmethoxysilane contains C ８ (n-octyldimethylmethoxysilane) and C １８ 5. The lipophilic glass-based coating film according to claim 4, which contains n-octadecyldimethylmethoxysilane.

7. C contained in the long-chain organic group-modified dimethylmethoxysilane ８ (n-octyldimethylmethoxysilane) and C １８ The ratio of (n-octadecyldimethylmethoxysilane) to the long-chain organic group-modified dimethylmethoxysilane satisfies the formula: 0.1≦C １８ / (C ８ +C １８ 7. The lipophilic glass-based coating film according to claim 6, wherein the lipophilic glass-based coating film satisfies the following condition: 1.)≦0.

8.

8. 2. The lipophilic glass-based coating film according to claim 1, wherein the solvent contained in the coating liquid is dibutyl ether.

9. 2. The lipophilic glass-based coating film according to claim 1, wherein a content of polysilazane contained in the coating liquid is in the range of 1% by mass or more and 15% by mass or less, relative to 100% by mass of the coating liquid, a content of long-chain organic group-modified dimethylmethoxysilane contained in the coating liquid is in the range of 1% by mass or more and 15% by mass or less, relative to 100% by mass of the coating liquid, and a content of solvent contained in the coating liquid is in the range of 70% by mass or more and 98% by mass or less, relative to 100% by mass of the coating liquid.

10. 2. The lipophilic glass-based coating film according to claim 1, wherein the substrate on which the lipophilic glass-based coating film is formed is glass, metal, or plastic.

11. The substrate is an electronic device, and the lipophilic glass-based coating film according to any one of claims 1 to 10 is formed on a glass part of the electronic device, a metal part of the electronic device, a plastic part of the electronic device, or a glossy black part of the electronic device, thereby making human fingerprints on these parts less noticeable.

12. The electronic device according to claim 11, wherein the electronic device is a smartphone, a personal computer, a tablet, a car navigation system, a digital signage, a television, or a home appliance equipped with a display or a touch panel.

13. The substrate is a building or a component constituting the building, and the lipophilic glass-based coating film according to any one of claims 1 to 10 is formed on glass parts of the building or the component constituting the building, metal parts of the building or the component constituting the building, plastic parts of the building or the component constituting the building, or black glossy parts of the building or the component constituting the building, thereby making human fingerprints on those parts less noticeable.

14. The building and components constituting the building according to claim 13, wherein the components constituting the building are window glass, doors, handrails, handles, operation buttons attached to the building, displays or touch panels attached to the building.

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