WO2010143425A1 - 防汚ガラスの製造方法及び防汚ガラス - Google Patents
防汚ガラスの製造方法及び防汚ガラス Download PDFInfo
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- WO2010143425A1 WO2010143425A1 PCT/JP2010/003848 JP2010003848W WO2010143425A1 WO 2010143425 A1 WO2010143425 A1 WO 2010143425A1 JP 2010003848 W JP2010003848 W JP 2010003848W WO 2010143425 A1 WO2010143425 A1 WO 2010143425A1
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- titania
- silica
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- glass
- peroxo
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- 239000011521 glass Substances 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000002689 soil Substances 0.000 title abstract 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 174
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 74
- 239000011941 photocatalyst Substances 0.000 claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 40
- 238000000576 coating method Methods 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 230000001699 photocatalysis Effects 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims description 45
- 230000003373 anti-fouling effect Effects 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000011282 treatment Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 38
- 239000010419 fine particle Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 229910010275 TiOOH Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000005357 flat glass Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005502 peroxidation Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229940100890 silver compound Drugs 0.000 description 1
- 150000003379 silver compounds Chemical class 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- -1 titanium alkoxides Chemical class 0.000 description 1
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/02—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
- C03C17/25—Oxides by deposition from the liquid phase
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/08—Silica
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/71—Photocatalytic coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/11—Deposition methods from solutions or suspensions
- C03C2218/113—Deposition methods from solutions or suspensions by sol-gel processes
Definitions
- the present invention relates to an antifouling glass manufacturing method and an antifouling glass, and more particularly to an antifouling glass manufacturing method and an antifouling glass whose surface is coated with a coating material having a photocatalytic function.
- a photocatalyst is a functional substance that absorbs light and activates its catalytic action.
- titania TiO 2
- titania having a peroxide bond or a composite compound in which titania and silica are bonded and having a peroxide bond hereinafter referred to as “titania-silica”.
- titania-silica mainly exhibits a photocatalytic function in the titania structure part, a hydrophilic function in the silica structure part, and a visible light region absorption function in the peroxide bond structure part.
- Such a photocatalyst has the function of decomposing dirt such as organic matter by its catalytic action. Therefore, by coating the glass surface with a photocatalyst, an antifouling glass capable of preventing contamination over a long period of time can be produced.
- the conventional method requires a device for heating to a high temperature of 300 ° C. or higher and a device for cooling, respectively, and there is a problem that the manufacturing cost increases due to the large amount of heat.
- a float glass used for a window glass has a maximum use temperature of about 380 ° C., and thus there is a risk that the heat treatment may cause a decrease in activity or other adverse effects due to the penetration of titania into the glass itself. Therefore, although it is desired to lower the heating temperature, there is a concern that the adhesiveness and hardness of the coating film become insufficient when the heating temperature is lowered.
- conventional photocatalyst solutions it is difficult to overcome all of these problems, and many hurdles still remain in establishing a factory integrated production of highly active photocatalyst-coated plate glass.
- an object of the present invention is to provide an antifouling glass whose surface is coated with a coating film having a high film hardness and an antifouling glass whose surface is coated with a coating film having a photocatalytic function. There is to do.
- Another object of the present invention is to provide a method for producing antifouling glass and a fouling glass whose surface is coated with a coating film having high film hardness and high adhesion to glass.
- the method for producing an antifouling glass according to the present invention is a method for producing an antifouling glass having a surface coated with a titania or / and titania-silica-containing coating material having a photocatalytic function, wherein the titania or / and titania A photocatalyst solution containing silica is applied on the surface of glass as a single solution and heated at a temperature exceeding 100 ° C. to form a coating film.
- titanium is at least titanium oxide having a TiOOH or TiOTi peroxidic bond
- titanium-silica includes a composite compound in which Ti and Si are bonded through O, and includes at least TiOOH, This means a substance containing at least one kind of SiOOH, TiOTi, SiOOSi, and TiOOSi, and is distinguished from titania or a simple mixture of titania and silica.
- the heating temperature may be a temperature exceeding 100 ° C. and, for example, 300 ° C. or less.
- the temperature is a temperature exceeding 100 ° C. and 140 ° C.
- the titania or / and titania-silica is preferably a mixture of peroxo titania or / and titania-silica and anatase titania or / and titania-silica obtained by heat-treating the peroxo type.
- the photocatalyst solution may contain peroxo type titania-silica and anatase type titania-silica in a ratio of, for example, 7: 3 to 9: 1.
- the photocatalyst solution may contain peroxo-type titania, and the heating temperature may be 140 ° C. or higher and 300 ° C. or lower.
- the heating time at the temperature is preferably at least 2 minutes.
- the peroxo-type and anatase-type mixture is preferably a mixed solution in which the peroxo-type solution is 50% or more.
- the method for producing the antifouling glass can be a factory production method by a series of production steps including pretreatment such as washing, application of the mixed solution, heat treatment at the heating temperature, and cooling treatment.
- the photocatalyst solution containing titania or / and titania-silica is applied to the surface of the glass with a single solution, and heated to a temperature of at least over 100 ° C. to form a coating film.
- An antifouling glass whose surface is coated with a high coating film can be produced.
- the film hardness of such a coating film was measured by a scratch hardness test (pencil method, JIS K5600-5-4), and a film hardness of 6H or more was obtained in most test examples.
- a coating film formed by applying a photocatalyst solution containing titania or / and titania-silica to a glass surface as a single solution and heating to a temperature exceeding at least 100 ° C. has high film hardness. Moreover, it has excellent adhesion to glass.
- the adhesion of the coating film was measured by an adhesion test (cross-cut method, JIS K5600-5-6). As a result, in most test examples, a result of class 0 (indicating no peeling) was obtained.
- FIG. 3 is a flowchart for preparing a titania-silica type photocatalyst solution used in an embodiment of the present invention. It is a flowchart which prepares the photocatalyst solution of the peroxo type titania used for embodiment of this invention.
- the test result performed in order to confirm the effect of this invention is shown.
- the test result performed in order to confirm the effect of this invention is shown.
- the test result performed in order to confirm the effect of this invention is shown.
- the test result performed in order to confirm the effect of this invention is shown.
- the test result performed in order to confirm the effect of this invention is shown.
- the surface of the antifouling glass according to the present embodiment is covered with a coating film containing titania or / and titania-silica, and the dirt (attached to the glass surface by the photocatalytic function exhibited by the titania or / and titania-silica (for example, it has a function of decomposing organic substances). Furthermore, it has a function of preventing dirt due to the hydrophilicity exhibited by the structural portion of silica.
- Titanium is titanium oxide having at least a TiOOH or TiOTi peroxidic bond
- titanium-silica includes a composite compound in which Ti and Si are bonded through O, and includes at least TiOOH, It means a material containing at least one kind of SiOOH, TiOTi, SiOOSi, and TiOSi, and is distinguished from titania or a simple mixture of titania and silica.
- Such titania-silica has been reported by, for example, the above-mentioned Patent Document 1.
- the coating film only needs to contain at least titania or / and titania-silica having a peroxide bond, and is not limited to contain other components.
- titania or / and titania-silica for example, a small amount of resin-based emulsion, colloidal silica, and other surfactants can be contained as binders for improving film-forming properties and adhesion.
- a component for imparting an additional function to the coating material for example, an antibacterial component (for example, silver colloid, silver compound) for adding an antibacterial function can be contained.
- the coating film containing titania or / and titania-silica is formed by applying a photocatalyst solution containing titania or / and titania-silica to the glass surface and heat-treating it at a predetermined temperature and time.
- a photocatalyst solution containing titania or / and titania-silica include a sol in which titania or / and titania-silica fine particles having a particle diameter of several nanometers to several tens of micrometers are dispersed.
- the titania or / and titania-silica fine particles are preferably peroxo-type titania or / and titania-silica described later.
- the present invention is not limited to this, and any one of anatase type, rutile type, anatase-rutile type, or brookite type can be used, and a peroxo type titania selected from these can be used.
- a peroxo type titania selected from these can be used.
- peroxo type and anatase type titania or / and titania-silica are mixed at a predetermined ratio, for example, 7: 3 to 9: 1.
- the concentration of titania or / and titania-silica fine particles in the solution can be adjusted to, for example, 0.05 mass% to 3 mass%.
- the medium for dispersing the titania-silica fine particles can be selected from, for example, water, alcohols, hydrogen peroxide, dilute nitric acid, and the like.
- Examples of the type of glass that is a coating material include soda glass, crystal glass, and borosilicate glass. However, the kind of glass is not limited. Moreover, as a use of glass, a window glass of a building or a motor vehicle is mentioned as an example, for example. However, the use of glass is not limited.
- FIG. 1 prepares a photocatalyst solution in which peroxo-type titania-silica fine particles are dispersed, and a photocatalyst solution in which anatase-type titania-silica fine particles are dispersed using the peroxo-type titania-silica fine particles as a raw material. This is a preferred example.
- a mixed solution of titanium tetraisopropoxide (TIP) and isopropanol (IPA), which is a raw material of titania, and a mixed solution of IPA and water are mixed to hydrolyze TIP and titania.
- the fine particles of titania are separated by filtration and dried at, for example, 100 ° C. to obtain titania powder.
- the titania powder thus obtained is an amorphous titania having no grain boundary.
- the titania raw material is not limited to TIP, and other titanium alkoxides (compounds in which H in the OH group of the alcohol molecule is substituted with Ti) such as titanium tetraethoxide may be used.
- the amorphous titania is dissolved in, for example, 35% by mass of hydrogen peroxide solution to form a titania gel (this is referred to as “primary treatment”).
- a mixture of tetraethyl orthosilicate (TEOS), which is a silica precursor, and ethanol is added to the gel body.
- TEOS tetraethyl orthosilicate
- a titania-silica fine particle sol in which titania and silica are bonded to each other by peroxidation by further adding, for example, 35% by mass of hydrogen peroxide to a titania gel body to which a silica precursor is added. A body is generated (this is called “secondary processing”).
- a photocatalyst solution containing peroxo-type titania-silica fine particles is prepared by adding, for example, 25% aqueous ammonia as an alkaline solution for pH adjustment, and adjusting the pH to a neutral region of, for example, 6 to 8. obtain.
- the anatase-type titania-silica fine particles can be prepared by anatating the above-mentioned peroxo-type titania-silica fine particles. More specifically, a photocatalyst solution containing peroxo-type titania-silica fine particles is heat-treated at, for example, 95 to 120 ° C. As a result, the peroxo-type titania-silica is modified into anatase-type titania-silica, and a photocatalyst solution containing anatase-type titania-silica fine particles is obtained.
- the photocatalyst solution in which peroxo-type titania fine particles are dispersed is subjected to a secondary treatment with the above hydrogen peroxide on a titania gel body to which no TEOS and EtOH are added.
- the titania-silica can be prepared by the same procedure except that the titania sol is formed.
- the anatase-type titania fine particles can be prepared by anatizing the obtained peroxo-type titania fine particles.
- a photocatalytic solution containing peroxo-type titania-silica, anatase-type titania-silica, peroxo-type titania, or anatase-type titania can be prepared.
- a coating film is formed on the glass surface using one or a mixture of two or more of these.
- a mixture of a peroxo type and an anatase type is preferable, and a mixed solution having a peroxo type solution of 50% or more is more preferable.
- a procedure for forming a coating film on the glass surface using the above-described photocatalyst solution will be described.
- an example using a mixture of a solution containing peroxo-type titania-silica fine particles and a solution containing anatase-type titania-silica fine particles will be described.
- a coating film can be formed by the same procedure even for a solution containing titania fine particles.
- the following description assumes the production process in a factory, it is not restricted to this, There may be a case of on-site construction.
- the liquid mixture of the photocatalyst solution prepared by the above-described method is applied to a glass whose surface has been pretreated by, for example, washing or polishing (hydrophilization) beforehand.
- the application method may be any method such as spray coating, dip coating, spin coating, roller coating, and hand coating with a brush.
- the coating amount is such that the coating amount of titania-silica per unit area is 4 g / m 2 to 30 g / m 2 .
- the thickness of the coating film is preferably 40 nm to 600 nm.
- the glass coated with the solution is heated by a heating device such as an electric furnace.
- the heating temperature is set to a temperature exceeding at least 100 ° C., and the heating temperature exceeding 100 ° C. is maintained for at least 2 minutes. If the temperature is too high, the energy cost at the time of heating and cooling is increased, and the effect of the obtained invention is reduced. Particularly preferred is 110 ° C to 140 ° C. Further, when the peroxo type titania is contained, a more preferable heating temperature is 140 ° C. or higher.
- the time for the heat treatment at the heating temperature may be 2 minutes or longer based on the test results described later, but is preferably 5 minutes or longer.
- antifouling glass After the above heat treatment, the glass is cooled, and if necessary, antifouling glass can be produced by processing such as cutting.
- the antifouling glass can be produced in a factory by a series of manufacturing steps including the above-described pretreatment such as washing, application of a photocatalyst solution, heat treatment, and cooling treatment.
- the photocatalyst solution containing titania or / and titania-silica is applied to the glass surface and heated at a temperature exceeding at least 100 ° C. to form a coating film.
- a coating film having a hardness of 6H or more in a scratch hardness test (pencil method, JIS K5600-5-4).
- the adhesion of such a coating film is measured by an adhesion test (cross-cut method, JIS K5600-5-6), which is a high adhesion of class 0 (indicating no peeling). Had.
- the temperature at which titania crystallizes is 300 ° C. or higher, baking at a heating temperature of 300 to 500 ° C. has been commonly performed.
- the present inventors have a hardness that is sufficient as a coating film, with the critical point being around 100 ° C. in the case of titania or / and titania-silica having a peroxide bond. It was found that it dramatically increased to 6H, and the present invention was achieved. Thus, sufficient film hardness and adhesion can be obtained even at a low temperature, so that the manufacturing cost can be reduced.
- the low temperature which exceeds 100 degreeC may be sufficient, it can anticipate performing the site construction which was difficult conventionally.
- the film hardness can be increased in a short time of at least 2 minutes, the manufacturing cost can be more reliably reduced, and the difficulty of on-site construction can be more reliably reduced. be able to.
- Photocatalyst Two types of titania-silica photocatalyst solution of peroxo type and anatase type
- Test piece Standard glass (100mm x 100mm x t1.0mm)
- Hardness test JIS K5600-5-4
- General paint test method- Scratch hardness (pencil method)
- Adhesion test JISK5600-5-6
- General paint test method- Adhesion (cross-cut method)
- Heat drying Electric furnace (no wind) AS ONE Corporation DO-450C
- FIG. 3 shows the hardness test result and adhesion test result of each test piece in which the mixing ratio, heating drying temperature and heating drying time of two kinds of titania-silica photocatalyst solutions of peroxo type and anatase type are set to various values.
- sample Nos. 13 to 30 with the temperature set at 105 ° C. or higher have a high hardness of 6H, while sample Nos. 1 to 12 at 100 ° C. or less are obtained.
- the pencil hardness is 3H or less.
- the film hardness is defined as the boundary between the hardness at which the entire portion through which the pencil passes and the hardness at which the scratch is relatively small.
- FIG. 4 is a graph showing the relationship between the heating temperature and the hardness based on the results of FIG. When graphed in this way, it can be understood that in the case of titania or / and titania-silica, the hardness of the coating film changes remarkably with the temperature exceeding 100 ° C. being critical.
- an antifouling glass having a high-hardness coating film having a hardness of 6H is obtained by applying titania or / and titania-silica photocatalyst solution to the glass surface and heat-treating it at a temperature exceeding at least 100 ° C. It was confirmed that it was obtained.
- Test Example 2 Peroxo type titania
- This test example is a test example 2 in which a test similar to the test example 1 was performed except that peroxo-type titania was used instead of titania-silica.
- FIG. 5 shows the evaluation results
- FIG. 6 is a graph showing the relationship between the heating temperature and the hardness based on the evaluation results.
- This test example is a comparative test in which tests similar to those of Test Examples 1 and 2 were performed except that conventionally known crystalline titania was used instead of titania-silica and peroxo type titania.
- the evaluation results are shown in FIG.
- the conventionally known crystalline titania does not increase in hardness at a low temperature of about 100 ° C., and only a hardness of B to HB can be obtained. Therefore, in the past, it was considered that heat treatment had to be performed at a high temperature of 300 ° C. or higher.
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Abstract
Description
チタニア-シリカを含有する光触媒溶液をガラス表面に塗布し、種々の温度及び時間で加熱乾燥することでコーティング膜の物理的強度(膜硬度)と、ガラスとの密着強度がどのように変化するか確認した。より具体的には、(1)表面を研磨処理した試験片(ガラス)に光触媒溶液をディップコートした。(2)予熱しておいた電気炉に試験片を投入し、一定温度で一定時間、炉内に静置した。(3)加熱終了後、炉の扉を半開にし、試験片を自然冷却した。(4)自然冷却後、ガラス表面温度が約20℃になったことを確認し、膜の硬度・密着性を評価した。試験詳細は、以下の通りである。
[試験詳細]
光触媒 :ペルオキソ型とアナタース型の2種類のチタニア-シリカ光触媒溶液
試験片 :標準ガラス(100mm×100mm×t1.0mm)
硬度試験:JIS K5600-5-4 塗料一般試験方法-:引っかき硬度(鉛筆法)
密着試験:JISK5600-5-6 塗料一般試験方法-:付着性(クロスカット法)
加熱乾燥:電気炉(無風)アズワン株式会社 DO-450C
本試験例は、チタニア-シリカに代えて、ペルオキソ型チタニアを用いたことを除けば試験例1と同様の試験を行った試験例2である。評価結果を図5に示し、評価結果を基にして加熱温度と硬度の関係をグラフにしたものを図6に示す。
本試験例は、チタニア-シリカ及びペルオキソ型チタニアに代えて、従来において公知の結晶性のチタニアを用いたことを除けば試験例1及び2と同様の試験を行った比較試験である。評価結果を図7に示す。図7の評価結果から分かるように、従来において公知の結晶性のチタニアは、100℃程度の低温では硬度が増さず、B~HBという硬度しか得られない。それ故、従来においては300℃以上という高温で加熱処理を行う必要があったと考える。
Claims (8)
- 光触媒機能を備えたチタニア又は/及びチタニア-シリカを含有するコーティング材で表面が被覆された防汚ガラスの製造方法であって、
チタニア又は/及びチタニア-シリカを含有する光触媒溶液を一液でガラスの表面に塗布し、少なくとも100℃を超える温度で加熱してコーティング膜を形成したことを特徴とする防汚ガラスの製造方法。 - 前記加熱温度は、100℃を超える温度であって、且つ、300℃以下であることを特徴とする請求項1に記載の防汚ガラスの製造方法。
- 前記チタニア又は/及びチタニア-シリカは、ペルオキソ型のチタニア又は/及びチタニア-シリカと、アナタース型のチタニア又は/及びチタニア-シリカの混合物であることを特徴とする請求項1又は2に記載の防汚ガラスの製造方法。
- 前記光触媒溶液がペルオキソ型のチタニア-シリカとアナタース型のチタニア-シリカを7:3~9:1の比率で含有することを特徴とする請求項1又は2に記載の防汚ガラスの製造方法。
- 前記光触媒溶液がペルオキソ型のチタニアを含有し、前記加熱温度が140℃以上であって、且つ、300℃以下であることを特徴とする請求項1に記載の防汚ガラスの製造方法。
- 前記温度で加熱する時間は、少なくとも2分以上であることを特徴とする請求項1~5のいずれか1項に記載の防汚ガラスの製造方法。
- 前記ペルオキソ型とアナタース型の混合物は、ペルオキソ型溶液が50%以上である混合溶液であることを特徴とする請求項3に記載の防汚ガラスの製造方法。
- 洗浄などの前処理、前記混合溶液の塗布、前記加熱温度での熱処理、冷却処理を含む一連の製造工程による工場生産方法であることを特徴とする請求項1~7のいずれか1項に記載の防汚ガラスの製造方法。
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CN103553358A (zh) * | 2013-11-08 | 2014-02-05 | 蚌埠玻璃工业设计研究院 | 一种Fe3+/SiO2/TiO2纳米复合薄膜的制备方法 |
WO2014119710A1 (ja) * | 2013-02-04 | 2014-08-07 | 株式会社アサカ理研 | コーティング液及び反射防止膜 |
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JP5965210B2 (ja) * | 2012-05-11 | 2016-08-03 | 旭化成株式会社 | 強化ガラス基板及び太陽電池モジュール |
CN107253828A (zh) * | 2017-06-09 | 2017-10-17 | 沈阳 | 一种防污式超硬防辐射玻璃及其制备方法 |
CN107253827A (zh) * | 2017-06-09 | 2017-10-17 | 沈阳 | 一种单透防污式超硬防辐射玻璃及其制备方法 |
CN107285642A (zh) * | 2017-06-09 | 2017-10-24 | 沈阳 | 一种护眼防污式超硬防辐射玻璃及其制备方法 |
CN107032636A (zh) * | 2017-06-09 | 2017-08-11 | 沈阳 | 一种七彩防污式超硬防辐射玻璃及其制备方法 |
CN107216048A (zh) * | 2017-08-01 | 2017-09-29 | 合肥利裕泰玻璃制品有限公司 | 一种防污玻璃的制备工艺 |
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