Lipophilic glass-based coating film, electronic device, structure, and member constituting structure

Abstract

[Problem] To provide lipophilic glass-based coating film properties that can be formed inexpensively without difficulty on the surface of a base material, and that have the effect of concealing a person's fingerprints and can make fingerprints inconspicuous. [Solution] A lipophilic glass-based inorganic coating film or an organic / inorganic coating film 10a is obtained by applying a coating solution containing a polysilazane, a long-chain organic-group-modified dimethylmethoxysilane, and a solvent to the surface of a base material and drying. The lipophilicity of the coating film is 20° or less in terms of the contact angle of approximately 1μL of oleic acid. The long-chain organic-group-modified dimethylmethoxysilane contains C8 (n-octyldimethylmethoxysilane) and C18 (n-octadecyldimethylmethoxysilane).

Description

Lipophilic glass coating films, electronic devices, buildings and building components

[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.

[0002] A coating film is 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 the molecule, and transparent nanofibers are dispersed in a solvent, the transparent nanofiber content being 0.1 mass% or more based on the total solid content, and the static contact angle between the coating film surface and a water droplet measured using a contact angle measuring device using the θ / 2 method is 10° or less, and that exhibits superhydrophilicity with a thickness of 70 to 2,000 nm 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.

[0003] Japanese Patent Application Laid-Open No. 2020-90595

[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.

[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 then 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 10° or less with oleic acid.

[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] Another example of the lipophilic glass-based coating film of the present invention is a long-chain organic group-modified dimethylmethoxysilane, which contains C ８ (n-octyldimethylmethoxysilane) or C １８ (n-octadecyldimethylmethoxysilane).

[0011] Another example of the lipophilic glass-based coating film of the present invention is a long-chain organic group-modified dimethylmethoxysilane, which contains C ８ (n-octyldimethylmethoxysilane) and C １８ (n-octadecyldimethylmethoxysilane).

[0012] Another example of the lipophilic glass-based coating film of the present invention is a C dimethyl methoxy silane modified with a long-chain organic group. ８ (n-octyldimethylmethoxysilane) and C １８ The mass ratio of (n-octadecyldimethylmethoxysilane) to long-chain organic group-modified dimethylmethoxysilane satisfies the formula: 0.1≦C１８ / (C ８ +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.

[0020] The lipophilic glass-based coating film according to 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 without much effort and at low cost. Because the coating film has lipophilicity due to the long-chain organic group-modified dimethylmethoxysilane, 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, and this has an excellent effect of concealing the fingerprints, thereby reliably making the fingerprints adhering to the surface of the substrate less noticeable.

[0022] The lipophilic glass-based coating film uses an inorganic polysilazane as the forming polysilazane and is an inorganic coating film or an organic / inorganic hybrid coating film. Therefore, fingerprints on the surface of the substrate can be made less noticeable. Furthermore, 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 numbers of carbon atoms, so that the coating film can be reliably imparted with lipophilicity, and human fingerprints adhering to the substrate become flat 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.

[0024] The lipophilic glass coating film is made by adding C to long-chain organic group-modified dimethyl methoxy silane. ８ (n-octyldimethylmethoxysilane) 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 adhering to the substrate become flat 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.

[0025] The lipophilic glass coating film is made by adding C to long-chain organic group-modified dimethyl methoxy silane. ８ (n-octyldimethylmethoxysilane) 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 adhering to the substrate become flat 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.

[0026] The lipophilic glass-based coating film has a mass ratio of long-chain organic group-modified dimethylmethoxysilane satisfying the formula: 0.1≦C １８ / (C ８ +C １８ ) ≦ 0.8 ８ (n-octyldimethylmethoxysilane) and C １８ Since the long-chain organic group-modified dimethylmethoxysilane contains (n-octadecyldimethylmethoxysilane), 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 become flat 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] In the lipophilic glass-based coating film, 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. Therefore, the coating film not only has an excellent effect of concealing fingerprints adhered to the surface of the substrate and can reliably make fingerprints adhered to the surface of the substrate less noticeable, but also has excellent strength and excellent scratch-resistant function, 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.

[0034] 1 is an enlarged cross-sectional image showing an example of a lipophilic glass-based coating film formed on the surface of a substrate; 2 is an enlarged cross-sectional image showing another example of a lipophilic glass-based coating film formed on the surface of a substrate; 3 is an enlarged cross-sectional image showing another example of a lipophilic glass-based coating film formed on the surface of a substrate; ８ An image showing an example of the chain length of (n-octyldimethylmethoxysilane). １８ An image showing an example of the chain length of (n-octadecyldimethylmethoxysilane). Cross-sectional views explaining in time series 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. An image showing an example of the structure of a lipophilic glass-based inorganic coating film. An image showing an example of the structure of a lipophilic glass-based organic / inorganic coating film. C on a soda-lime glass substrate and a single crystal silicon substrate on which a lipophilic glass-based inorganic coating film or a lipophilic glass-based organic / inorganic hybrid coating film is formed. １８ / (C ８ +C １８ 1 is a graph showing the relationship between the contact angle (°) of 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 and the contact angle (°) of water.

[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 showing an example of a lipophilic glass-based coating film 10a formed on the surface 12 of a substrate 11, Fig. 2 is an enlarged cross-sectional image showing another example of a lipophilic glass-based coating film 10b formed on the surface 12 of the substrate 11, Fig. 3 is an enlarged cross-sectional image showing another example of a lipophilic glass-based coating film 10c formed on the surface 12 of the substrate 11, Fig. 4 is an enlarged cross-sectional image showing another example of a lipophilic glass-based coating film 10c formed on the surface 12 of the substrate 11, ８ FIG. 1 is an image diagram showing an example of the chain length of (n-octyldimethylmethoxysilane).

[0036] FIG. 5 shows the C １８FIG. 6 is a schematic diagram showing an example of the chain length of (n-octadecyldimethylmethoxysilane), and FIG. 6 is a cross-sectional view illustrating, in time sequence, the mechanism by which lipophilic glass-based coating films 10a to 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 to 10c, and FIG. 8 is a schematic diagram showing an example of the structure of lipophilic glass-based organic / inorganic coating films 10a to 10c. In FIGS. 1 to 5, C ８ (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 to 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 to 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 polysilazanes that form the coating films 10a-10c are inorganic polysilazanes.

[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-based perhydropolysilazane (perhydropolysilazane). The polysilazane may be an Si-C-N-based organopolysilazane or an Si-C-based polycarbosilane. Furthermore, SiC-O-based, Si-B-C-N-based, or Si-Ti-N-based polysilazane may also be used. Organopolysiloxane may also be used.

[0039] The polysilazane contained in the coating liquid 13 may be a modified polysilazane such as organic polysilazane, such as 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-mentioned 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 micropores 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] The inorganic polysilazane includes a linear structure having structural units, has a molecular weight of 690 to 2,000, and has 3 to 10 SiH groups in one molecule. ３ groups, and the element ratios as determined by chemical analysis are Si: 59 to 61, N: 31 to 34, and H: 6.5 to 7.5 by weight, respectively; and perhydropolysilazane having a polystyrene-equivalent average molecular weight in the range of 3,000 to 20,000.

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

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

[0047] Another example of the perhydropolysilazane compound group is represented by the following general formula (Chemical Formula 4), which has a Si—N bond and a functional group (R １ ~R ３ ) and -(SiR １ R ２ -NR ３ )-units, and a functional group R １ , R ２ At least one of the above is an organic polymer formed from an organic functional group such as an alkyl group having carbon (C).

[0048] Perhydropolysilazane is a functional group (R １ ~R ３ ) is a methyl group (CH ３ The content of -(SiR) is 50% or more. １ R ２ -NR ３ )-units as well as polymers formed from functional groups (R １ ~R ３ ) with different compositions １ R ２ -NR ３ Furthermore, the perhydropolysilazane may be a polymer having a chain, cyclic or crosslinked structure, or may be a polymer having a combination of these structures. １ , R ２ , R ３represents 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 is a hydrogen atom.

[0049] As an example, perhydropolysilazane (A) is —(SiH(CH)) represented by the following general formula (Chemical Formula 5): ３ )-NH)- unit, -(Si(CH ３ )2-NH)- unit, -(SiR １ (CH ３ )-NR ３ )-units. １ (CH ３ )-NR ３ The functional group R1 in the )-unit is H or CH ３ 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 enables the early formation of lipophilic glass-based inorganic coating films 10a to 10c or lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c on the surface 12 of the substrate 11.

[0050] Another example of perhydropolysilazane (B) is —(SiH(CH)) represented by the following general formula (Chemical Formula 6): ３ )-NH)- unit, -(SiR １ (CH ３ )-NH)- units, and １ (CH ３ )-NH)- unit functional group R 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 cover the surface 12 of the substrate 11 (molded product) can be improved.

[0051] The perhydropolysilazane contained in the coating liquid 13 may be a mixture of multiple types of perhydropolysilazanes containing different polymer structures. For example, the perhydropolysilazane may be a mixture of perhydropolysilazane (A) and perhydropolysilazane (B). Experiments on mixing these perhydropolysilazanes (A) and perhydropolysilazane (B) have confirmed that a blend of 50% by mass of perhydropolysilazane (A) and 50% by mass of perhydropolysilazane (B) exhibits rust prevention properties equal to or greater than that of perhydropolysilazane (A) alone, and also shortens the curing time (the time it takes to form the lipophilic glass-based coating films 10a-10c) compared to perhydropolysilazane (B) alone.

[0052] Organopolysilazane is a compound represented by the general formula (Chemical Formula 4) where R １ and R ２ a hydrogen atom, R ３ has an organic group. ２ polysilazanes having a cyclic structure with a degree of polymerization of 3 to 5, with (R ３ SiHNH) ｘ [(R ２ SiH) １．５ N] １－Ｘ Polysilazane having both a chain structure and a cyclic structure in the molecule represented by the chemical formula (0.4<X<1), １ a hydrogen atom, R ２ , R ３ Polysilazane having an organic group in R １ and R ２ an organic group, R ３ has a hydrogen atom in -(R １ R ２ SiNR ３ )- as a repeating unit, and mainly includes polysilazanes having a cyclic structure with a degree of polymerization of 3 to 5.

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

[0054] Also, for example, R１ Six ３ Polysilazane R having a crosslinked structure obtained by ammonia decomposition of (X: halogen) １ Si(NH) ｘ , R １ Six ３ and R ２ ２ Six ２ The polysilazane having the structure obtained by co-ammoniolysis of the above is represented by the following general formula (Chemical Formula 8).

[0055] 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 The polymer has 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). 1 The 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, that is, 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. 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 the monovalent substituted hydrocarbon group include a 3-mercaptopropyl group (-(CH2)3-SH) and a 3-aminopropyl group (-(CH2)3-NH2). 1 From the viewpoint of fine particle formation, each of the groups is preferably independently an alkyl group or an alkenyl group, more preferably independently 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 the organopolysiloxane having the average unit formula (A), at least a portion of R 1is 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, and 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 1 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 each represent the respective structural units (R 1 3SiO 1 / 2 ), (R 1 2SiO 2 / 2 ), (R 1 SiO 3 / 2 ) and (SiO 4 / 2 The sum of the molar fractions of each structural unit, a, b, c, and d, is 1. a represents the average value of the molar fractions of R 1 3SiO 1 / 2 a is the mole fraction of siloxane units represented by M units. a is from 0 to 0.5, 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 2SiO 2 / 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 c 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 / 2is 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 structural unit (R 1 3SiO 1 / 2 When the structural unit (R) in the average unit formula (A) is present, the structural unit may be of only one type, or may be of two or more types. 1 2SiO 2 / 2 ) and (R 1 SiO 3 / 2 The same applies to the R 1 At least a 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 R in each of the structural units 1 At least a part of 2 The amount of the structural unit replaced 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 later, and remains in the molecule without being hydrolyzed or polycondensed. The hydroxy group in this structural unit is, for example, a hydroxy group that remains in the molecule after the alkoxy group is hydrolyzed without being polycondensed.

[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 The organopolysiloxane contains a silsesquioxane having a random structure, a complete cage structure, an incomplete cage structure, and a ladder structure, and 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 the alkoxysilane, 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 the alkoxysilane, 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 the alkoxysilane, 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. 4 / 2 As the alkoxysilane forming 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] (Chemical Formula 9) Long-chain organic group-modified dimethylmethoxysilane: C ｎ The long-chain organic group-modified dimethylmethoxysilane includes two or more types of dimethylmethoxysilanes having different carbon numbers in the organic group. ８ (n-octyldimethylmethoxysilane) or C １８ (n-octadecyldimethylmethoxysilane). Alternatively, the long-chain organic group-modified dimethylmethoxysilane includes C ８ (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 formed by adding C to long-chain organic group-modified dimethylmethoxysilane. ８ (n-octyldimethylmethoxysilane) and C １８ (n-octadecyldimethylmethoxysilane), and long-chain organic group-modified dimethylmethoxysilane with C ８(n-octyldimethylmethoxysilane) and C １８ It is made from a coating liquid 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 formed by adding C to long-chain organic group-modified dimethylmethoxysilane. ８ (n-octyldimethylmethoxysilane), and long-chain organic group-modified dimethylmethoxysilane with C ８ It is made from a coating liquid 13 containing (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 liquid 13 containing (n-octadecyldimethylmethoxysilane).

[0074] C shown in the image diagram of Figure 4 ８ (n-octyldimethylmethoxysilane) is represented by the following general formula (Chemical Formula 10): ８ (n-octyldimethylmethoxysilane) has lipophilicity of C １８ (n-octadecyldimethylmethoxysilane), but C １８ It has higher mobility (liquid state) than (n-octadecyldimethylmethoxysilane).

[0075] C shown in the image diagram of Figure 5 １８ (n-octadecyldimethylmethoxysilane) is represented by the following general formula (Chemical Formula 11): １８ (n-octadecyldimethylmethoxysilane) has lipophilicity of C ８ Although it is higher than that of (n-octyldimethylmethoxysilane), the hydrocarbon chains are arranged closely together and their mobility (solid state) is low.

[0076] The long-chain organic group-modified dimethylmethoxysilane has a mass ratio satisfying the formula: 0.1≦C ８ / (C ８ +C １６ ) ≦ 0.8 ８ (n-octyldimethylmethoxysilane) and C １８ (n-octadecyldimethylmethoxysilane).

[0077] Furthermore, C １８ (n-octadecyldimethylmethoxysilane) is C ８ Compared to (n-octyldimethylmethoxysilane), the alkyl group is longer and has stronger lipophilicity. １８ When the coating agent is cured by adding oleic acid, 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 their mobility and increasing the contact angle with oleic acid. ８ Even if it is hardened by adding it to the film component, C １８ It also aligns but does not crystallize. ８ Since the lipophilicity of C is low, the contact angle of oleic acid does not decrease much. １８ and C ８ If you put both, C １８ Since the alkyl groups are not adjacent to each other and do not crystallize, １８ The 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 unevenness is the factor that further reduces the contact angle of oleic acid.

[0078] The long-chain organic group-modified dimethylmethoxysilane includes C ８ (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 to 8) monobutyl ether, reaction products of 3-chloropropyltrimethoxysilane with polyethylene glycol (repeating units 1 to 8) monoethyl ether, reaction products of 3-chloropropyltrimethoxysilane with polyethylene glycol (repeating units 1 to 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 composition may contain 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] Dibutyl ether is used as the solvent. Dibutyl ether has the molecular formula C ８ H １８ The solvent is a compound belonging to the ethers represented by 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, based on 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 having 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 having excellent flexibility, impact resistance, and corrosion resistance and having a planned thickness on the surface 12 of the substrate 11.

[0081] The content of the 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 the 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 the 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] The content of the solvent contained in the coating liquid 13 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. If the blending ratio of the solvent is less than 70% by mass, the viscosity of the coating liquid 13 becomes high, and the thickness of the inorganic coating films 10a-10c formed from the coating liquid 13 becomes 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. Because the content of the solvent contained in the coating liquid 13 is in the above range, the coating liquid 13 can be used to form the inorganic coating films 10a-10c with the appropriate viscosity and the planned thickness, which have excellent flexibility, impact resistance, and corrosion resistance, on the surface 12 of the substrate 11.

[0083] The coating liquid 13 is coated or sprayed onto the surface 12 of the substrate 11 to be coated, and chemically reacts with water to form (deposit) single-layer or multi-layer ultra-thin lipophilic glass-based coating films 10a to 10c. The lipophilic glass-based coating films 10a to 10c are deposited as films having an average thickness in the range of 0.2 μm to 20 μm, preferably 0.5 μm to 20 μm.

[0084] There is no particular limitation on the coating method in the step of coating the surface 12 of the substrate 11 with the coating liquid 13, and the coating is performed by a coating method suited to the shape of the substrate 11 to be coated (covered). For example, coating can be performed by a spray method, a dipping method, a brush coating method, a roll coating method, a gravure coating method, a flexography method, an inkjet method, or the like. There is no particular limitation on the amount of coating (application amount) of the coating liquid 13, and the amount of coating is determined according to the surface performance required of the substrate 11 to be coated. Generally, it is 0.1 to 20 g / m in terms of solid content. 2 The coating amount is 0.1 g / m 2 If the coating amount is less than 20 g / m, the lipophilic glass-based coating films 10a to 10c having the desired properties will not be formed, and 2 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 of the coating liquid 13, water such as purified water (H ２ O) may be sprayed onto the surface 12 of the substrate 11 to deposit water on the surface 12 of the substrate 11. This promotes a chemical reaction between the water deposited on the surface 12 of the substrate 11 and the components contained in the coating liquid 13, allowing lipophilic glass-based coating films 10a to 10c to be rapidly formed on the surface 12 of the substrate 11, and strong coating films 10a to 10c to be formed on the surface 12 of the substrate 11.

[0086] A coating liquid containing inorganic polysilazane as a main component can be coated as a primer on the surface 12 of the substrate 11 as a pretreatment step prior to the coating step with the coating liquid 13. 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] 6, the mechanism by which the lipophilic glass-based inorganic coating films 10a to 10c and the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c are formed on the surface 12 of the substrate 11 will be explained as follows: In forming (forming) the lipophilic glass-based inorganic coating films 10a to 10c, the surface 12 of the substrate 11 is coated with a coating liquid 13 in a coating step, and then the surface 12 of the 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 to 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, after the surface 12 of the article 11 is coated with the coating liquid 13, the surface 12 of the article 11 is irradiated with ultraviolet light while being left at room temperature (normal temperature). Alternatively, after the surface 12 of the article 11 is coated with the coating liquid 13, the surface 12 of the article 11 is irradiated with ultraviolet light while being irradiated with infrared light to heat the surface 12 of the article 11 to a temperature of less than 400°C.

[0089] As shown in FIG. 6A, a small amount of moisture (water droplets) is attached to the surface 12 of the substrate 11 due to condensation or humidity in the air (water (H ２ When the coating liquid 13 is applied to the surface 12 of the substrate 11 in a thin film form by the coating process, the unit components constituting the polysilazane (perhydropolysilazane, organopolysilazane, organopolysiloxane, etc.) contained in the coating liquid 13 react with the moisture (H ２ 0), an organic composite structure (-(Si(CH ３ ) ２ —O—Si(CH ３ ) ２ As a result, lipophilic glass-based inorganic coating films 10a to 10c (glass coating layers (amorphous glass coatings)) having a hydroxyl group (H)-unit) are formed. The inorganic coating films 10a to 10c are substantially 100% vitrified (inorganized).

[0090] In addition, the unit components constituting the polysilazane (perhydropolysilazane, organopolysilazane, organopolysiloxane, etc.) contained in the coating liquid 13 react with the moisture (H ２0), an organic composite structure (-(Si(CH ３ ) ２ —O—Si(CH ３ ) ２ The above chemical reaction produces a small amount of gas (NH ３ , H ２ ) are generated as by-products, but these gases do not remain on the surface 12 of the substrate 11 but volatilize (emit) into the atmosphere.

[0091] As shown in FIG. 6(b), polysilazanes (perhydropolysilazane, organopolysilazane, organopolysiloxane, etc.), C ８ (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 moisture contained in the air in a surface layer 14 that comes into contact with the air, whereby gases such as hydrogen and ammonia, which are by-products of the coating films 10a to 10c, 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) in a back layer 16 in contact with the surface 12 of the substrate 11 with water (water droplets) adhering to the surface 12 of the substrate 11 or with hydroxyl groups -OH present as terminal ends on the surface 12 of the substrate 11, whereby gases such as hydrogen and ammonia 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 (produced) 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, thereby sequentially forming (generating) the coating layer 15 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-10c are glass coating layers that are substantially 100% vitrified (inorganized). The organic / inorganic hybrid coating films 10a-10c are formed from a glass coating layer (amorphous glass coating layer) and an organic coating layer. The inorganic coating films 10a-10c or the organic / inorganic hybrid coating films 10a-10c are primarily 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-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 ultra-thin films at the nanometer level because the coating liquid 13 contains polysilazanes (perhydropolysilazane, organopolysilazane, organopolysiloxane). Their film thicknesses are in the range of 5 nm to 1 μm, preferably 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 material that deforms, such as a cloth or nonwoven fabric. The coating state of the coating films 10a-10c can be maintained by following the deformation of the surface 12 of the substrate 11.

[0096] As shown in the structural image of the inorganic coating films 10a to 10c in FIG. 7 or the structural image of the organic / inorganic hybrid coating films 10a to 10c in FIG. 8, -(Si(OH) ２ —O—Si(OH) ２ A crosslinking reaction occurs between the hydrolysis product having a siloxane bond (Si—O—Si) and a part of the main chain in each coating layer (surface layer 14, intermediate layer 17, back surface layer 16) and a crosslinked structure is formed, and the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c have a dense and flexible structure. The formation of the crosslinked structure allows hydrophobic methyl groups (CH ) derived from polysilazane (perhydropolysilazane, organopolysilazane, organopolysiloxane) to appear on the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c. ３ ) and the hydrophilic hydroxyl group (OH) derived from the hydrolysis product.

[0097] 6(c), the surface 12 of the substrate 11 before being coated with the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c has many microscopic irregularities formed due to small scratches and the like that occur 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 to 10c that have hardened and penetrated into the irregularities exert an anchor effect, and the coating films 10a to 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 for 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 anchor 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, and the like that has occurred on the surface 12 of the substrate 11. After the cleaning treatment, a predetermined time is allowed to pass to cause condensation, etc., to form on the surface 12 of the substrate 11, allowing naturally occurring 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 unevenness has been formed by the roughening, 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 that comes into 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 unevenness 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 is 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 being coated.

[0100] The inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c are formed by adding C to a long-chain organic group-modified dimethylmethoxysilane. ８ (n-octyldimethylmethoxysilane) and C １８By including n-octadecyldimethylmethoxysilane, the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c have excellent oleophilicity and a high affinity between the surface and oil, so that the oil does not form droplets but spreads out. Therefore, by forming the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c on the surface 12 of the substrate 11, even if a person's finger touches the surface 12 of the substrate 11 and the finger's fingerprint (oil) adheres to the surface 12 of the substrate 11, the oleophilicity of the surfaces of the coating films 10a to 10c prevents the fingerprint (oil) from rising on the surface of the coating films 10a to 10c, and the fingerprint (oil) flattens on the surface 12 of the substrate 11 (the surfaces of the coating films 10a to 10c), making the fingerprint (oil) adhered to the surface 12 of the substrate 11 less visible, and the fingerprint (oil) becomes less noticeable on the surface 12 of the substrate 11.

[0101] Substrates on which the lipophilic glass-based inorganic coating film 10a-10c or the lipophilic glass-based organic / inorganic hybrid coating film 10a-10c can be formed include glass, metal, and plastic. The inorganic coating film 10a-10c or the organic / inorganic hybrid coating film 10a-10c made from a coating liquid 13 is formed on the surface of the glass. Glass on which the inorganic coating film 10a-10c or the organic / inorganic hybrid coating film 10a-10c can be formed includes all currently manufactured glass, 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 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 the coating film 10a-10c is formed on the surface 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 the surface 12 of glass (molded glass product), even if a person's fingerprints (oils) adhere to the glass surface 12, the lipophilicity of the surfaces of the coating films 10a to 10c makes the fingerprints (oils) flat on the glass surface, making it difficult to clearly see the fingerprints (oils) adhered to the glass surface 12, and making the fingerprints (oils) less noticeable on the 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 the 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, or 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 fingerprint (oil) from a human finger adheres to the metal surface 12, the fingerprint (oil) becomes flat on the metal surface 12 due to the lipophilicity of the surfaces of the coating films 10a to 10c, and the fingerprint (oil) adhered to the metal surface 12 becomes difficult to clearly see, making the fingerprint (oil) less noticeable on the metal surface 12.

[0105] On a plastic surface 12, an inorganic coating film 10a-10c or an organic / inorganic hybrid coating film 10a-10c made from a coating liquid 13 is formed. The plastics that form the inorganic coating film 10a-10c or the organic / inorganic hybrid coating film 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. The plastic is processed into plastic molded products in various three-dimensional shapes, such as films, sheets, plates, and columns, and the 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 makes the fingerprints (oil) flat on the plastic surface, making it difficult to clearly see the fingerprints (oil) adhered to the plastic surface 12, and making the fingerprints (oil) less noticeable on the plastic surface 12.

[0106] 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 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 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, and the 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 film 10a-10c or the lipophilic glass-based organic / inorganic hybrid coating film 10a-10c is formed is an electronic device. The inorganic coating film 10a-10c or the organic / inorganic hybrid coating film 10a-10c made from a coating liquid 13 is formed on the surface of the glass portion of the electronic device, the surface of the metal portion of the electronic device, the surface of the plastic portion of the electronic device, or the surface of the glossy black portion of the electronic device. The glossy black portion is a portion of the electronic device that mirror-reflects black and appears glossy and shiny.

[0108] Electronic devices include smartphones, personal computers, tablets, car navigation systems, digital signage, televisions, and home appliances equipped with displays and touch panels. The electronic devices also include all devices developed in the future. The 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 fingerprint (oil) from a human finger adheres to the surface of the glass part of each electronic device, the fingerprint (oil) becomes flat on the surface 12 of the glass part of each electronic device due to the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c, and the fingerprint (oil) adhered to the surface 12 of the glass part of each electronic device becomes difficult to clearly see, making the fingerprint (oil) less noticeable on the surface 12 of the glass part.

[0110] Even if a fingerprint (oil) from a human finger adheres to the surface of the metal part of each electronic device, the fingerprint (oil) becomes flat on the surface 12 of the metal part of each electronic device due to the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c, and the fingerprint (oil) adhered to the surface 12 of the metal part of each electronic device becomes difficult to clearly see, making the fingerprint (oil) less noticeable on the surface 12 of the metal part.

[0111] Even if a fingerprint (oil) from a human finger adheres to the surface of the plastic part of each electronic device, the fingerprint (oil) becomes flat on the surface 12 of the plastic part of each electronic device due to the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c, and the fingerprint (oil) adhered to the surface 12 of the plastic part of each electronic device becomes difficult to clearly see, making the fingerprint (oil) less noticeable on the surface 12 of the plastic part.

[0112] Even if a fingerprint (oil) from a human finger adheres to the surface of the black glossy portion of each electronic device, the fingerprint (oil) becomes flat on the surface 12 of the black glossy portion of each electronic device due to the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c, and the fingerprint (oil) adhered to the surface 12 of the black glossy portion of each electronic device becomes difficult to clearly see, making the fingerprint (oil) inconspicuous 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, and human 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, and the coating films 10a to 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 parts, metal parts, plastic parts, and glossy black parts of the electronic devices 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 to 10c or lipophilic glass-based organic / inorganic hybrid coating films 10a to 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 the coating films 10a to 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 the coating films 10a to 10c are formed, thereby preventing scratches on these surfaces.

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

[0116] Structures include buildings and certain structures attached to them, as well as man-made structures other than buildings. Structures include structures for viewing, offices, stores, performance venues, warehouses, and other similar facilities located within 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.), furniture, and fixtures. Structures include all those developed in the future. Components that make up structures include window glass, doors, handrails, handles, operation 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, recreational 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 / television / 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 (oils) adhere to the surface of the glass parts of each building and the components constituting each building, the fingerprints (oils) become flat on the surface 12 of the glass parts of each building and the components constituting each building due to the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c, and the fingerprints (oils) adhered to the surface 12 of the glass parts of each building and the components constituting each building become difficult to see clearly, and the fingerprints (oils) become inconspicuous on the surface 12 of the glass parts.

[0120] Even if a fingerprint (oil) from a human finger adheres to the surface of each building or the metal part of a component constituting each building, the fingerprint (oil) becomes flat on the surface 12 of each building or the metal part of the component constituting each building due to the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c, and the fingerprint (oil) adhered to the surface 12 of each building or the metal part of the component constituting each building becomes difficult to clearly see, and the fingerprint (oil) becomes inconspicuous on the surface 12 of the metal part.

[0121] Even if a fingerprint (oil) from a human finger adheres to the surface of each building or the plastic part of a component constituting each building, the fingerprint (oil) becomes flat on the surface 12 of the plastic part of each building or the component constituting each building due to the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c, and the fingerprint (oil) adhered to the surface 12 of the plastic part of each building or the component constituting each building becomes difficult to clearly see, and the fingerprint (oil) becomes inconspicuous on the surface 12 of the plastic part.

[0122] Even if a fingerprint (oil) from a human finger adheres to the surface of the glossy black portion of each building or a component constituting each building, the fingerprint (oil) becomes flat on the surface 12 of the glossy black portion of each building or a component constituting each building due to the lipophilicity of the surface of the inorganic coating films 10a to 10c or the organic / inorganic hybrid coating films 10a to 10c, 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 members constituting the buildings, the metal parts of the buildings and the members constituting the buildings, the plastic parts of the buildings and the members constituting the buildings, and the glossy black parts of the buildings and the members constituting the buildings, and human fingerprints attached to the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the buildings and the members constituting the buildings are flattened on the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the buildings and the members constituting the buildings on which the lipophilic glass-based coating film has been formed, and the coating films 10a to 10c have an excellent effect of concealing fingerprints attached to the surfaces of the buildings and the members constituting the buildings, and can reliably make fingerprints attached to the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of the buildings and the members constituting the buildings inconspicuous.

[0124] The glass parts, metal parts, plastic parts, and glossy black parts of these buildings and the components that make up these buildings 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, so that the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of these buildings and the components that make up these buildings on which coating films 10a-10c are formed can be smoothed, and the surfaces of the glass parts, metal parts, plastic parts, and glossy black parts of these buildings and the components that make up these buildings on which coating films 10a-10c are formed can be protected, and scratches on these surfaces can be prevented.

[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 / (C ８ +C １８) and the contact angle (°) of oleic acid, and FIG. 10 is a diagram showing the relationship between the water contact angle (°) of 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 in accordance with 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, the oleic acid was allowed to settle on the top surfaces of the substrates for 60 seconds. The oleic acid on the top surfaces of the soda-lime glass substrate and the single-crystal silicon substrate was then 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 the water landed on the top surface of the plate, a 5-second wait was held until the water stabilized on the top surface of the plate. Next, the water 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 FIG. １８ / (C ８ +C １８ ) is 0.1, the contact angle (°) of oleic acid is 5 (°), C １８ / (C ８ +C １８ ) is 0.2, the contact angle (°) of oleic acid is 4 (°), C １８ / (C ８ +C １８ When the contact angle (°) of oleic acid is 0.3, the contact angle (°) of C is 4.5 (°), １８ / (C８ +C １８ ) is 0.5, the contact angle (°) of oleic acid is 5 (°), C １８ / (C ８ +C １８ ) is 0.7, the contact angle (°) of oleic acid is 7 (°), C １８ / (C ８ +C １８ When the contact angle (°) of C is 0.8, the contact angle (°) of oleic acid is 8 (°). １８ / (C ８ +C １８ ) is 0.1≦C １８ / (C ８ +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 FIG. １８ / (C ８ +C １８ ) is 0.1 to 1.0, the water contact angle (°) exceeds 90 (°), and it has been 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, and therefore 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 human fingerprints adhering to the substrate are flattened on the surface of the substrate on which the coating film is formed, thereby providing an excellent effect of concealing the fingerprints 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 the organic / inorganic hybrid coating film is formed, thereby preventing scratches on the surface of the substrate on which the inorganic coating film or the 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 a long-chain organic group-modified dimethylmethoxysilane to a C ８ (n-octyldimethylmethoxysilane) and / or C １８ (n-octadecyldimethylmethoxysilane), and the mass ratio of the long-chain organic group-modified dimethylmethoxysilane is expressed by the formula: 0.1≦C １８ / (C ８ +C １８ ) ≦ 0.8 ８ (n-octyldimethylmethoxysilane) and C １８Since (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 surface of glass, metal, or plastic, fingerprints adhering to the glass, metal, or plastic surface are flattened 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 the lipophilic glass-based inorganic coating films 10a to 10c or the lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c, the coating films 10a to 10c can be formed on the glass, metal, plastic, or glossy black parts of the electronic devices without any effort or cost, and human 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 the coating films 10a to 10c formed thereon, and the coating films 10a to 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 the lipophilic glass-based inorganic coating films 10a to 10c or the 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-10c are formed, and the lipophilic glass-based coating films 10a-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 to 10c or lipophilic glass-based organic / inorganic hybrid coating films 10a to 10c are formed, the glass, metal, plastic, and black glossy portions are coated with lipophilic glass-based coating films 10a to 10c having excellent strength and excellent scratch resistance. This makes it possible to smooth the surfaces of the glass, metal, plastic, and black glossy portions of buildings and building components on which coating films 10a to 10c are formed, and to protect the surfaces of the glass, metal, plastic, and black glossy portions of buildings and building components on which coating films 10a to 10c are formed, thereby preventing scratches on these surfaces.

[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: Substrate 12: Surface 13: Coating liquid 14: Surface layer 15: Covering layer 16: Back layer 17: Intermediate layer 18: Anchor portion

Claims

1. A lipophilic glass-based coating film, which 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 which has lipophilicity of 20° or less when measured at room temperature by the contact angle of approximately 1 μl of oleic acid.

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

3. 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. The lipophilic glass-based coating film according to claim 1, wherein the long-chain organic group-modified dimethylmethoxysilane that forms the coating film contains two or more types of organic groups with different numbers of carbon atoms.

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

9. The lipophilic glass-based coating film according to claim 1, wherein the content of polysilazane contained in the coating liquid is in the range of 1% by mass to 15% by mass, based on 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 to 15% by mass, based on 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 to 98% by mass, based on 100% by mass of the coating liquid.

10. 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. An electronic device wherein 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, a metal part, a plastic part, or a glossy black part of the electronic device, thereby making human fingerprints on those 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. A building and a component that constitutes the building, wherein the substrate is a building or a component that constitutes the building, and the lipophilic glass-based coating film according to any one of claims 1 to 10 is formed on the glass parts of the building and the component that constitutes the building, the metal parts of the building and the component that constitutes the building, the plastic parts of the building and the component that constitutes the building, and the black glossy parts of the building and the component that constitutes the building, thereby making human fingerprints on those parts less noticeable.

14. The building and components constituting the building described in 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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