WO2009123135A1 - Composition de revêtement de photocatalyseur - Google Patents

Composition de revêtement de photocatalyseur Download PDF

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Publication number
WO2009123135A1
WO2009123135A1 PCT/JP2009/056530 JP2009056530W WO2009123135A1 WO 2009123135 A1 WO2009123135 A1 WO 2009123135A1 JP 2009056530 W JP2009056530 W JP 2009056530W WO 2009123135 A1 WO2009123135 A1 WO 2009123135A1
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Prior art keywords
photocatalyst
coating composition
mass
oxide particles
silver
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PCT/JP2009/056530
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English (en)
Japanese (ja)
Inventor
聡 北崎
順次 亀島
浩二 表敷
洋二 高木
佑希子 児玉
裕之 井筒
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Toto株式会社
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Publication of WO2009123135A1 publication Critical patent/WO2009123135A1/fr

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    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/002—Mixed oxides other than spinels, e.g. perovskite
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
    • B01J23/8926—Copper and noble metals
    • 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
    • B01J37/0201—Impregnation
    • B01J37/0211—Impregnation using a colloidal suspension
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/16—Antifouling paints; Underwater paints
    • C09D5/1606—Antifouling paints; Underwater paints characterised by the anti-fouling agent
    • C09D5/1612—Non-macromolecular compounds
    • C09D5/1618—Non-macromolecular compounds inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/48—Stabilisers against degradation by oxygen, light or heat
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/22—Compounds containing nitrogen bound to another nitrogen atom

Definitions

  • the present invention relates to a photocatalyst coating composition capable of forming a good photocatalyst coating and having excellent liquid agent stability.
  • photocatalysts such as titanium oxide have been used in many applications such as building exterior materials.
  • photocatalyst it is possible to decompose various harmful substances using light energy, or to make the surface of the substrate coated with photocatalyst hydrophilic and easily wash away dirt adhering to the surface with water.
  • Patent Document 1 See pamphlet of International Publication No. 97/00134 (Patent Document 1), JP-A-11-140432 (Patent Document 2), JP-A-11-169727 (Patent Document 3)).
  • the photocatalytic effect of titanium oxide is limited to only when light such as sunlight or an ultraviolet lamp is irradiated.
  • light such as sunlight or an ultraviolet lamp is irradiated.
  • the effects of the photocatalyst regarding the antifouling property due to the superhydrophilicity, even if the ultraviolet ray is not continuously irradiated, the external contamination of the film surface having the photocatalytic function can be removed even by intermittent irradiation. Further, in the decomposition of harmful substances, if the substance does not increase naturally, the decomposition gradually proceeds by intermittent light irradiation.
  • an antibacterial agent other than the photocatalyst together with the photocatalyst.
  • antibacterial agents there are various types of antibacterial agents, but since photocatalysts decompose organic substances, it is necessary to use antibacterial agents made of inorganic substances when used in combination with photocatalysts.
  • the inorganic antibacterial component include metals such as silver, copper, and zinc, and various industrial products that exhibit antibacterial properties by causing them to exist on the substrate surface have been developed.
  • an antibacterial metal can also be used in the photocatalyst.
  • the antibacterial property can be expressed regardless of the presence or absence of irradiation light.
  • a silver or copper compound that is an antibacterial metal is mixed with a film forming material containing a photocatalyst, and then the antibacterial metal is fixed to the photocatalyst by irradiating light to reduce the silver or copper compound.
  • a technique is known (see Japanese Patent Application Laid-Open No. 11-169726 (Patent Document 4)).
  • Patent Document 4 Japanese Patent Application Laid-Open No. 11-169726
  • the coating film cannot be formed stably, and the precipitate causes a defect in the appearance after application, and the antibacterial effect varies. Therefore, it may be possible to add a silver component to the sol immediately before the production of the coating so as not to cause coloring or precipitation, but this is not rational.
  • the inventors of the present invention have recently described that a coating composition containing titanium oxide particles and inorganic oxide particles and further containing copper element and silver element and quaternary ammonium hydroxide is stable without discoloration or precipitation. Obtained knowledge.
  • an object of the present invention is to provide a photocatalyst coating composition having excellent liquid agent stability.
  • the photocatalytic coating composition according to the present invention comprises titanium oxide particles, inorganic oxide particles, copper element, silver element, quaternary ammonium hydroxide, and a solvent.
  • hydrolyzable silicone is contained as an optional component.
  • Photocatalyst coating composition comprises titanium oxide particles, inorganic oxide particles, elemental copper, elemental silver, quaternary ammonium hydroxide, and a solvent. According to the present invention, it is possible to stably contain copper element and silver element in the coating composition containing titanium oxide particles.
  • the photocatalytic coating composition of the present invention further comprises hydrolyzable silicone as an optional component, 1 to 20 parts by mass of the titanium oxide particles, Greater than 70 parts by weight and less than 99 parts by weight of the inorganic oxide particles; 0 to 10 parts by mass of the hydrolyzable silicone in terms of silica; The total amount of the titanium oxide particles, the inorganic oxide particles, and the hydrolyzable silicone in terms of silica is 100 parts by mass.
  • a photocatalyst layer using the coating composition according to the present invention, while suppressing erosion to a substrate (particularly an organic substrate), weather resistance of the coating, harmful gas decomposability, inhibition of mold and algae growth, Alternatively, it is possible to obtain a film excellent in various desired film properties (transparency, film strength, etc.).
  • the titanium oxide particles used in the present invention are preferably anatase type titanium oxide particles.
  • the titanium oxide particles preferably have an average particle diameter of 10 nm to 100 nm, more preferably 10 nm to 60 nm.
  • the average particle diameter is calculated as a number average value obtained by measuring the length of any 100 particles that enter a 200,000-fold field of view with a scanning electron microscope.
  • As the particle shape a true sphere is most preferable, but a substantially circular or elliptical shape is also preferable.
  • the particle length is approximately calculated as ((major axis + minor axis) / 2). Within this range, weather resistance, harmful gas decomposability, and various desired film properties (transparency, film strength, etc.) are efficiently exhibited.
  • the preferable content of titanium oxide particles in the photocatalyst coating composition of the present invention is 1 part by mass or more and 20 parts by mass with respect to 100 parts by mass of the total amount of titanium oxide particles, inorganic oxide particles, and hydrolyzable silicone in terms of silica. Less than 1 part by mass, more preferably more than 1 part by mass and 15 parts by mass or less.
  • the weather resistance of a photocatalyst layer can further be improved by making content of a titanium oxide particle more than 1 mass part and less than 5 mass parts, More preferably, it is 2 to 4.5 mass parts. Further, by setting the content of the titanium oxide particles to 5 parts by mass or more and 15 parts by mass or less, more preferably 5 parts by mass or more and 10 parts by mass or less, not only the functions due to the weather resistance and the photocatalytic activity described above, but also ultraviolet rays. Absorbability can also be exhibited sufficiently.
  • the silver content of the photocatalytic coating composition is 6.5 wt% or less than 0.05 wt% with respect to titanium oxide particles in terms of silver in Ag 2 O, preferably Is 0.1 mass% or more and 5 mass% or less, More preferably, it is the range of 0.3 mass% or more and 3 mass% or less.
  • the lower limit is a value at which the antibacterial effect due to silver can be preferably expected, and the upper limit is a value at which the coating composition can be expected to exist more stably.
  • the photocatalytic coating composition according to the present invention contains quaternary ammonium hydroxide.
  • alkaline compounds such as ammonia and primary to tertiary amines are all known as components that stabilize the sol of alkaline titanium oxide, but these alkaline compounds contain antibacterial metals such as silver. It tends to dissolve.
  • antibacterial metals such as silver. It tends to dissolve.
  • the discoloration of the antibacterial metal component is largely due to the ionization of the antibacterial metal, and it is considered that the presence of these alkali compounds that dissolve the antibacterial metal in the sol is not preferable.
  • the present inventors have surprisingly found that the above problem can be solved by using quaternary ammonium hydroxide as an sol dispersion stabilizer while being an alkali compound.
  • quaternary ammonium hydroxide has a tendency to suppress discoloration of the antibacterial metal while stabilizing the photocatalytic titanium oxide sol because it hardly dissolves the antibacterial metal.
  • the quaternary ammonium hydroxide used in the present invention include tetramethylammonium hydroxide, tetraethylammonium hydroxide, and tetrabutylammonium hydroxide.
  • tetramethylammonium hydroxide is stable per se and can be easily obtained, so that it is suitable for stabilizing the photocatalytic coating composition of the present invention.
  • the content of quaternary ammonium hydroxide is preferably in the range of 0.01 to 0.1 mol with respect to 1 mol of titanium oxide because the photocatalytic coating composition according to the present invention can be stabilized.
  • the sol stability is not greatly deteriorated even if the addition exceeds the above upper limit, it is preferable to avoid using a large amount of quaternary ammonium hydroxide because it dissolves a little antibacterial metal.
  • the silver discoloration in the photocatalytic coating composition according to the present invention is further suppressed in the presence of copper in addition to the quaternary ammonium hydroxide.
  • the form of copper in the composition according to the present invention is unclear, but as the material form to be added, oxides, hydroxides and the like are preferable because they do not contain nitrate ions or chloride ions that destabilize the sol.
  • the content of copper in the photocatalyst coating composition according to the present invention is such that silver and copper are converted into Ag 2 O and CuO, respectively, and Ag 2 O / CuO is used as a mass ratio of 0/100 ⁇ [Ag 2 O / CuO] ⁇ 65/35, more preferably 10/90 or more and 60/40 or less.
  • the amount of copper and silver is preferably such that the total amount converted to Ag 2 O and CuO exceeds 0.1 and is added to 10% by mass or less with respect to the titanium oxide particles.
  • a more preferable range is more than 0.1 and 8% by mass or less, and a further preferable range is 0.5% by mass or more and 5% by mass or less.
  • the photocatalyst and copper directly act on the antifungal property. It is considered that the silver compound is reduced by electrons generated by the photocatalyst and contributes to improvement of charge separation efficiency. Therefore, if the ratio of Ag 2 O / CuO in the photocatalyst layer is too small, the specific effect due to the coexistence of silver is also reduced. Conversely, if the ratio is too large, the relative concentration of copper in the photocatalyst layer is It may be determined from the viewpoint of reducing the antifungal property and further suppressing the coloring by silver.
  • the blending ratio of the titanium oxide particles is considerably smaller than that of the inorganic oxide particles. It is considered that this makes it possible to minimize the direct contact of the titanium oxide particles with the substrate, thereby making it difficult to erode the substrate (particularly the organic substrate). Further, it is considered that the amount of ultraviolet rays reaching the substrate can be reduced by the ultraviolet absorption by the photocatalyst itself, and damage to the substrate due to ultraviolet rays can be reduced. As a result, the photocatalyst layer of the present invention can be directly applied to a substrate having at least a surface formed of an organic material without interposing an intermediate layer for protecting the substrate.
  • the time and cost required for manufacturing the photocatalyst-coated body can be reduced by the amount that the intermediate layer is not required.
  • the above-mentioned various phenomena occur simultaneously, preventing erosion of the base material (especially organic base material), weather resistance, harmful gas decomposability, or various desired film properties (transparency, film strength) Etc.) is also advantageous and preferable in that a photocatalyst-coated body excellent in the above is realized.
  • the inorganic oxide particles used in the present invention are not particularly limited as long as they are inorganic oxide particles capable of forming a layer with titanium oxide particles, and any kind of inorganic oxide particles can be used.
  • examples of such inorganic oxide particles include single oxide particles such as silica, alumina, zirconia, ceria, yttria, boronia, magnesia, calcia, ferrite, amorphous titania, hafnia; and barium titanate, silica
  • grains of complex oxides, such as calcium acid, are mentioned, More preferably, it is a silica particle.
  • these inorganic oxide particles are preferably in the form of an aqueous colloid using water as a dispersion medium; or an organosol dispersed in a hydrophilic solvent such as ethyl alcohol, isopropyl alcohol, or ethylene glycol, and particularly preferably. Colloidal silica.
  • the inorganic oxide particles have an average particle size of more than 5 nm and less than 40 nm. More preferably, it is more than 5 nm and 30 nm or less.
  • the average particle diameter is calculated as a number average value obtained by measuring the length of any 100 particles entering a field of view of 200,000 times with a scanning electron microscope.
  • the particle shape a true sphere is most preferable, but a substantially circular or elliptical shape is also preferable.
  • the particle length is approximately calculated as ((major axis + minor axis) / 2).
  • the average particle size is within the above range, weather resistance, harmful gas decomposability, or various desired film properties (transparency, film strength, etc.) are efficiently exhibited.
  • a photocatalyst layer that is transparent and has good adhesion can be obtained.
  • the sliding resistance of a photocatalyst layer can be made higher by making the average particle diameter of inorganic oxide particles more than 5 nm and 20 nm or less.
  • the content of the inorganic oxide particles in the photocatalyst coating composition of the present invention exceeds 70 parts by mass with respect to 100 parts by mass of the total amount of titanium oxide particles, inorganic oxide particles, and hydrolyzable silicone in terms of silica. 99 parts by mass or less, preferably 85 parts by mass or more and less than 99 parts by mass.
  • the photocatalytic coating composition of the present invention is preferably substantially free of hydrolyzable silicone, more preferably not at all.
  • the hydrolyzable silicone is a general term for an organosiloxane having an alkoxy group and / or a partially hydrolyzed condensate thereof.
  • it is allowed to contain hydrolyzable silicone as an optional component as long as the harmful gas decomposability of the present invention can be ensured. Therefore, the content of hydrolyzable silicone is 0 part by mass or more and 10 parts by mass with respect to 100 parts by mass of the total amount of titanium oxide particles, inorganic oxide particles, and hydrolyzable silicone in terms of silica (SiO 2 ).
  • ethyl silicate 40 oligomer, R is an ethyl group
  • ethyl silicate 48 oligomer, R is an ethyl group
  • methyl silicate 51 oligomer, R is a methyl group
  • the photocatalyst coating composition may contain a surfactant as an optional component.
  • the surfactant used in the present invention may be contained in an amount of 0 parts by mass or more and less than 10 parts by mass with respect to 100 parts by mass in total of titanium oxide particles, inorganic oxide particles, and hydrolyzable silicone in terms of silica. It is preferably 0 to 8 parts by mass, more preferably 0 to 6 parts by mass.
  • One of the effects of the surfactant is leveling to the substrate, and the amount of the surfactant may be appropriately determined within the above-mentioned range depending on the combination of the photocatalyst coating composition and the substrate. May be 0.1 parts by weight.
  • This surfactant is an effective component for improving the wettability of the photocatalyst coating composition, but in the photocatalyst layer formed after coating, it is an inevitable impurity that no longer contributes to the effect of the photocatalyst-coated body of the present invention. It corresponds to. Therefore, depending on the wettability required for the photocatalyst coating composition, it may be used within the above range, and if the wettability is not a problem, the surfactant may be contained substantially or not at all.
  • the surfactant to be used can be appropriately selected in consideration of the dispersion stability of titanium oxide particles and inorganic oxide particles, and the wettability when coated on the intermediate layer. More preferably, ether type nonionic surfactant, ester type nonionic surfactant, polyalkylene glycol nonionic surfactant, fluorine-based nonionic surfactant, silicon-based nonionic surfactant Agents.
  • the photocatalyst coating composition of the present invention comprises titanium oxide particles, inorganic oxide particles, copper, silver, quaternary ammonium hydroxide, and optionally hydrolyzable silicone and surfactant dispersed in a solvent at the above specific mixing ratio. Can be obtained.
  • the solvent any solvent capable of appropriately dispersing the above components can be used, and it may be water or an organic solvent.
  • the solid content concentration of the photocatalyst coating composition of the present invention is not particularly limited, but it is preferably 1 to 10% by mass because it is easy to apply.
  • the components in the photocatalyst coating composition are analyzed by separating the coating composition into particle components and a filtrate by ultrafiltration, and using infrared spectroscopy, gel permeation chromatography, fluorescent X-ray spectroscopy, etc. It can be analyzed and evaluated by analyzing the spectrum.
  • the photocatalyst-coated body comprises a base material and a photocatalyst layer provided on the base material.
  • the photocatalyst layer contains titanium oxide particles, inorganic oxide particles, and hydrolyzable silicone as an optional component as a film forming component, and further includes silver and copper, quaternary ammonium hydroxide, and an interface as an optional component.
  • An activator is an activator.
  • a preferred embodiment of the photocatalyst layer according to the present invention is 1 part by mass or more and less than 20 parts by mass, preferably more than 1 part by mass and 15 parts by mass or more titanium oxide particles and more than 70 parts by mass and 99 parts by mass or less, preferably 85 parts by mass.
  • it contains silver and copper, quaternary ammonium hydroxide, and a surfactant as an optional component.
  • This structure is excellent in weather resistance, harmful gas decomposability, mold and algae growth control, or various desired film properties (transparency, film strength, etc.) while preventing erosion of the substrate (especially organic substrate). It is possible to obtain a photocatalyst-coated body. The reason why these many excellent effects are sometimes realized at the same time is not clear, but is thought to be as follows. However, the following description is merely a hypothesis, and the present invention is not limited by the following hypothesis. First, since the photocatalyst layer is basically composed of two types of particles of titanium oxide particles and inorganic oxide particles, there are abundant gaps between the particles.
  • the photocatalyst layer of the present invention does not contain hydrolyzable silicone or even if it contains 10 parts by mass with respect to 100 parts by mass of the total amount of titanium oxide particles, inorganic oxide particles, and hydrolyzable silicone in terms of silica. Therefore, it is considered that a sufficient gap between particles can be secured.
  • Such a gap realizes a structure in which harmful gases such as NOx and SOx easily diffuse into the photocatalyst layer, and as a result, the harmful gases do not come into efficient contact with the titanium oxide particles and are decomposed by the photocatalytic activity. It is thought.
  • the photocatalyst layer preferably has a film thickness of 0.5 ⁇ m or more and 3.0 ⁇ m or less, more preferably 1.0 ⁇ m or more and 2.0 ⁇ m or less.
  • the ultraviolet rays that reach the interface between the photocatalyst layer and the substrate are sufficiently attenuated, thereby improving the weather resistance.
  • the photocatalyst particles having a lower content ratio than the inorganic oxide particles can be increased in the film thickness direction, harmful gas decomposability is also improved.
  • excellent characteristics can be obtained in terms of transparency and film strength.
  • the base material used in the present invention may be various materials regardless of inorganic materials or organic materials as long as it can form a photocatalyst layer thereon, and the shape is not limited.
  • Preferred examples of the substrate from the viewpoint of materials include metals, ceramics, glasses, plastics, rubber, stones, cement, concrete, fibers, fabrics, wood, paper, combinations thereof, laminates thereof, Examples thereof include those having at least one layer of coating on the surface.
  • Preferred examples of the base material from the viewpoint of use include building materials, building interior and exterior, window frames, window glass, structural members, interior and exterior of vehicles, painting, exteriors of machinery and articles, dust covers and paintings, traffic signs , Various display devices, advertising towers, sound insulation walls for roads, sound insulation walls for railways, bridges, guard rail exteriors and paintings, tunnel interiors and paintings, insulators, solar cell covers, solar water heater heat collection covers, greenhouses, vehicle lighting Examples include a lamp cover, an outdoor lighting fixture, a stand, and a film, sheet, seal, and the like for adhering to the surface of the article, and more preferably all exterior materials.
  • a substrate having at least a surface formed of an organic material can be used as the substrate, and the entire substrate is formed of an organic material or an inorganic material. Any of those in which the surface of the substrate is coated with an organic material (for example, a decorative board) is included.
  • an organic material for example, a decorative board
  • the photocatalyst coating body which has can be manufactured. As a result, the time and cost required for manufacturing the coated body can be reduced by the amount that the intermediate layer is not required to be formed.
  • the photocatalyst coating body of this invention can be easily manufactured by apply
  • a method for coating the photocatalyst layer generally used methods such as brush coating, roller, spray, roll coater, flow coater, dip coating, flow coating, screen printing, electrodeposition, vapor deposition and the like can be used. After applying the coating composition to the substrate, it may be dried at room temperature, or may be heat-dried as necessary.
  • a titania aqueous dispersion (hereinafter referred to as a copper / silver-containing titania aqueous dispersion) coexisting as a sol with a copper compound and a silver compound (average particle diameter: 48 nm basic) obtained by hydrothermal treatment was obtained.
  • Inorganic oxide particles / water-dispersed colloidal silica (average particle size: 26 nm basic) ⁇ Water-dispersed colloidal silica (average particle size: 14 nm basic) ⁇ Water-dispersed colloidal silica (average particle size: 5 nm basic)
  • Surfactant / polyether-modified silicone surfactant hydrolyzable silicone / tetramethoxysilane polycondensate SiO 2 equivalent concentration: 51 mass%, solvent: alcohol / water
  • composition of the coating compositions T-1 to T-22 used in the following examples was as shown in Table 1 below.
  • Examples 1 to 6 Evaluation of weather resistance
  • a photocatalyst-coated body provided with a photocatalyst layer was produced as follows. First, a colored organic coated body was prepared as a base material. This colored organic coated body is obtained by applying general-purpose acrylic silicone to which carbon black powder is added on a float plate glass and sufficiently drying and curing it. On the other hand, a copper / silver-containing titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are shown in T-1 to T-6 in Table 1. The photocatalyst coating composition was obtained by mixing at a blending ratio.
  • this photocatalyst coating composition does not contain hydrolysable silicone.
  • the total solid concentration of the photocatalyst and the inorganic oxide in the photocatalyst coating composition was 5.5% by mass. Further, the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month. In all cases, no precipitation or discoloration was observed, and the composition was stable.
  • the obtained photocatalyst coating composition was spray-applied on the colored organic coating body heated in advance and dried at 120 ° C. Thus, a photocatalyst layer was formed to obtain a photocatalyst-coated body.
  • the film thickness of the photocatalyst layer was measured by observation with a scanning electron microscope, it was about 0.5 ⁇ m in any of Examples 1 to 6.
  • the weather resistance test was carried out on the photocatalyst-coated body having a size of 50 ⁇ 100 mm thus obtained as follows.
  • the photocatalyst-coated body was put into a sunshine weatherometer (S-300C, manufactured by Suga Test Instruments) defined in JIS B7753. After 300 hours had passed, the test piece was taken out and visually compared with the photocatalyst-coated bodies of Examples 1 to 6 that were not put into the sunshine weatherometer.
  • Examples 7 to 10 Evaluation of harmful gas decomposability
  • a photocatalyst-coated body having a photocatalyst layer was produced as follows. First, a colored organic coated body was prepared as a base material. This colored organic coated body is obtained by applying general-purpose acrylic silicone to which carbon black powder is added on a float plate glass and sufficiently drying and curing it.
  • a copper / silver-containing titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are listed in Tables T-1, T-4, T-
  • the photocatalyst coating composition was obtained by mixing at a blending ratio indicated by 7 and T-8. Examples 8 and 9 This photocatalytic coating composition does not contain hydrolyzable silicone.
  • the total solid concentration of the photocatalyst and the inorganic oxide in the photocatalyst coating composition was 5.5% by mass. Further, the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month. In all cases, no precipitation or discoloration was observed, and the composition was stable.
  • the obtained photocatalyst coating composition was spray-applied on the colored organic coating body heated in advance and dried at 120 ° C. Thus, a photocatalyst layer was formed to obtain a photocatalyst-coated body.
  • the film thickness of the photocatalyst layer was measured by observation with a scanning electron microscope, it was about 1 ⁇ m in any of Examples 7 to 10.
  • the photocatalyst-coated body having a size of 50 ⁇ 100 mm thus obtained was subjected to a gas decomposability test as follows.
  • the photocatalyst-coated body was irradiated with 1 mW / cm 2 of BLB light for 12 hours or more.
  • One coated body sample was set in the reaction vessel described in JIS R1701. NO gas was mixed with air adjusted to 25 ° C. and 50% RH so as to be about 1000 ppb, and introduced into a light-shielded reaction vessel for 20 minutes. Thereafter, BLB light adjusted to 3 mW / cm 2 was irradiated for 20 minutes while the gas was introduced. Thereafter, the reaction vessel was shielded from light again with the gas introduced.
  • NOx removal amount [NO (after irradiation) ⁇ NO (at irradiation)] ⁇ [NO 2 (at irradiation) ⁇ NO 2 (after irradiation)]
  • the obtained results are as shown in Table 3.
  • G in the table represents a NOx removal amount of 150 ppb or more
  • NG represents a NOx removal amount of 50 ppb or less.
  • the photocatalyst layer was composed of titanium oxide particles and an inorganic oxide, and substantially free of hydrolyzable silicone, thereby showing good NOx decomposability.
  • those containing 10 parts by mass of hydrolyzable silicone had low NOx decomposability.
  • Examples 11 to 21 Measurement of linear transmittance and ultraviolet shielding rate
  • a photocatalyst-coated body provided with a photocatalyst layer was produced as follows. First, a float plate glass having a transmittance of 94% at a wavelength of 550 nm was prepared as a substrate. On the other hand, a copper / silver-containing titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are shown in T-1 to T-4 of Table 1. The photocatalyst coating composition was obtained by mixing at a blending ratio.
  • the obtained photocatalyst coating composition was spray-coated on the above-mentioned float plate glass plate heated in advance, and dried at 120 ° C. Thus, a photocatalyst layer was formed to obtain a photocatalyst-coated body.
  • the film thickness of the photocatalyst layer was measured by observation with a scanning electron microscope, the values shown in Table 4 were obtained.
  • the photocatalyst-coated body having a size of 50 ⁇ 100 mm obtained as described above was measured for a linear (550 nm) transmittance and an ultraviolet (300 nm) shielding rate as follows: UV, visible and near infrared spectrophotometer (manufactured by Shimadzu Corporation, UV) -3150).
  • the film thickness is 3 ⁇ m or less, thereby sufficiently shielding ultraviolet rays due to deterioration of organic substances, and It was found that transparency can be preferably secured.
  • Photocatalyst-coated bodies provided with a photocatalyst layer were produced as follows. First, a float plate glass having a transmittance of 94% at a wavelength of 550 nm was used as a substrate. On the other hand, a copper / silver-containing titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are listed in Table 1, T-1, T-9, T- The photocatalyst coating composition was obtained by mixing at a blending ratio shown in FIG. In addition, this photocatalyst coating composition does not contain hydrolysable silicone.
  • the total solid concentration of the photocatalyst and the inorganic oxide in the photocatalyst coating composition was 5.5% by mass. Further, the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month. In all cases, no precipitation or discoloration was observed, and the composition was stable.
  • the obtained photocatalyst coating composition was spin-coated on the above-mentioned substrate at 1000 rpm for 10 seconds and dried at 120 ° C. to obtain a photocatalyst layer.
  • the haze of the photocatalyst-coated body having a size of 50 ⁇ 100 mm thus obtained was measured using a haze meter (haze e-gard plus manufactured by Gardner).
  • Example 25 to Example 30 Evaluation of antifungal property by silver compound and copper compound 1
  • the photocatalyst coating body provided with the photocatalyst layer was manufactured as follows. First, a colored organic coated body was prepared as a base material. This colored organic coated body is obtained by applying general-purpose acrylic silicone to which a white pigment is added on a float plate glass and sufficiently drying and curing it.
  • a copper / silver-containing titania aqueous dispersion and titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are listed in Tables T-1 and T-1
  • the photocatalyst coating composition was obtained by mixing at a blending ratio shown in ⁇ 11 to T-14 and T-22. In addition, this photocatalyst coating composition does not contain hydrolysable silicone.
  • Example 25 a copper / silver-containing titania aqueous dispersion in which the compounding ratio of the silver compound and the copper compound was adjusted (all of Example 28 was a copper compound, and all of Example 29 was a silver compound) was used.
  • Example 30 a titania aqueous dispersion containing no silver compound or copper compound was used.
  • the total solid concentration of the photocatalyst and the inorganic oxide in the photocatalyst coating composition was 5.5% by mass. Further, the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month, and, except that Example 29 was slightly yellowed, it was a stable composition without any precipitation or discoloration.
  • the obtained photocatalyst coating composition was spray-coated on the above-mentioned white coated body heated in advance, and dried at 120 ° C.
  • a photocatalyst layer was formed to obtain a photocatalyst-coated body.
  • the film thickness of the photocatalyst layer was measured by observation with a scanning electron microscope, it was about 1 ⁇ m in any of Examples 25 to 30.
  • the anti-fungal property of the photocatalyst-coated body having a size of 50 ⁇ 50 mm thus obtained was evaluated as follows. Aspergillus niger (NBRC6341) previously cultured at 25 ° C. for 7 to 14 days on a potato dextrose agar medium as a test bacterium, this was dispersed in physiological saline containing 0.005% by weight of dioctyl sodium sulfosuccinate, and a spore suspension It was created.
  • the spore suspension was dropped on the photocatalyst-coated body obtained by the above method so as to be 4 to 6 ⁇ 10 5 pieces / mL per test piece to obtain an anti-mold test piece.
  • the test piece was covered with an adhesion film, placed in a petri dish capable of moisture retention, and moisturized glass was placed and used for the test.
  • test piece was placed together with the petri dish under BLB light irradiation, and irradiated with BLB light for 24 hours so that the photocatalyst-coated body surface was 0.4 mW / cm 2 .
  • the spore suspension was collected and cultured on a potato dextrose agar medium, and the number of surviving bacteria was counted.
  • the antifungal property was obtained by determining the difference between the logarithmic value of the number of surviving bacteria obtained in Examples 25 to 30 and the logarithmic value of the number of surviving bacteria in the photocatalyst-untreated specimen.
  • the antifungal activity value in the table is the difference between the logarithmic value of the survival cell count obtained in Examples 25 to 30 and the logarithmic value of the survival cell count of the photocatalyst untreated specimen. The larger the value, the higher the antifungal property.
  • the antifungal activity value is higher in the example prepared using the silver / copper-containing titania aqueous dispersion than in the example in which only the silver compound or only the copper compound is added. It was confirmed that high antifungal performance was obtained by mixing.
  • Examples 31 and 32 Evaluation of antifungal property by silver compound and copper compound 2 Copper / silver-containing titania aqueous dispersion and titania aqueous dispersion as a photocatalyst, water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are listed as T-15 and T-16 in Table 1.
  • the photocatalytic coating composition was obtained by mixing at the blending ratio shown in FIG. Further, the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month. In all cases, no precipitation or discoloration was observed, and the composition was stable.
  • the obtained photocatalyst coating composition was formed into a film in the same manner as in Examples 25 to 30, and the photocatalyst-coated bodies of Examples 31 and 32 were obtained. This photocatalyst-coated body was evaluated for antifungal properties in the same manner as in Examples 25 to 30.
  • Table 7 also shows the antifungal activity value of Example 26. It was confirmed that high antifungal performance was obtained when the amount of [Ag 2 O + CuO] was 0.5% by mass, 3% by mass, and 5% by mass with respect to the titanium oxide particles.
  • Example 33 Evaluation of coating film adhesion
  • a photocatalyst-coated body provided with a photocatalyst layer was produced as follows. First, a colored organic coated body was prepared as a base material. This colored organic coated body is obtained by applying general-purpose acrylic silicone to which carbon black powder is added on a float plate glass and sufficiently drying and curing it. On the other hand, a copper / silver-containing titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are mixed in a mixing ratio shown by T-3 in Table 1. As a result, a photocatalytic coating composition was obtained.
  • this photocatalyst coating composition does not contain hydrolysable silicone.
  • the total solid concentration of the photocatalyst and the inorganic oxide in the photocatalyst coating composition was 5.5% by mass. Further, the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month, but it was a stable composition without any precipitation or discoloration.
  • the obtained photocatalyst coating composition was spray-applied on the colored organic coating body heated in advance and dried at 120 ° C. Thus, a photocatalyst layer was formed to obtain a photocatalyst-coated body.
  • the film thickness of the photocatalyst layer was measured by observation with a scanning electron microscope, it was about 0.5 ⁇ m.
  • the coating film adhesion was evaluated as follows.
  • the photocatalyst-coated body was immersed in a calcium hydroxide saturated solution at 20 ⁇ 5 ° C. After 7 days had elapsed, the surface was dried indoors, and then a cellophane tape was affixed to the surface. After holding the tape at one end and pulling it off in a direction perpendicular to the surface, the surface of the coating film is observed with a digital microscope. I understood. *
  • Example 34 to Example 36 Evaluation of weather resistance (exposure outdoors)
  • the photocatalyst coating body provided with the photocatalyst layer was manufactured as follows. First, a colored organic coated body was prepared as a base material. This colored organic coated body is obtained by applying general-purpose acrylic silicone to which carbon black powder is added on a sealer-treated ceramic siding base material, followed by sufficient drying and curing.
  • a copper / silver-containing titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are listed in Table 9, T-9, T-17 and T-
  • a photocatalytic coating composition was obtained by mixing at a blending ratio shown in FIG.
  • this photocatalyst coating composition does not contain hydrolysable silicone.
  • the total solid concentration of the photocatalyst and the inorganic oxide in the photocatalyst coating composition was 5.5% by mass.
  • the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month. In all cases, no precipitation or discoloration was observed, and the composition was stable.
  • the obtained photocatalyst coating composition was spray-applied on the colored organic coating body heated in advance and dried at 120 ° C.
  • a photocatalyst layer was formed to obtain a photocatalyst-coated body.
  • the film thickness of the photocatalyst layer was measured by observation with a scanning electron microscope, it was about 1 ⁇ m in any of Examples 34 to 36.
  • the photocatalyst-coated body having a size of 50 ⁇ 100 mm obtained in this way was exposed outdoors at an angle of 20 ° from the horizontal toward the south surface in Miyakojima using an exposure stand defined in JIS K 5600-7-6. . The appearance was visually confirmed every three months.
  • Examples 37 to 39 hydrophilicity evaluation
  • the photocatalyst coating body provided with the photocatalyst layer was manufactured as follows. First, a colored organic coated body was prepared as a base material. This colored organic coated body is obtained by applying general-purpose acrylic silicone to which carbon black powder is added on a float plate glass and sufficiently drying and curing it. On the other hand, a copper / silver-containing titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are listed as T-17, T-19 and T- in Table 1. A photocatalytic coating composition was obtained by mixing at a blending ratio of 20.
  • this photocatalytic coating composition does not contain hydrolyzable silicone.
  • the total solid concentration of the photocatalyst and the inorganic oxide in the photocatalyst coating composition was 5.5% by mass. Further, the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month. In all cases, no precipitation or discoloration was observed, and the composition was stable.
  • the obtained photocatalyst coating composition was spray-applied on the colored organic coating body heated in advance and dried at 120 ° C.
  • a photocatalyst layer was formed to obtain a photocatalyst-coated body.
  • the film thickness of the photocatalyst layer was measured by observation with a scanning electron microscope, it was about 1 ⁇ m in any of Examples 37 to 39.
  • the photocatalyst-coated body thus obtained was evaluated for hydrophilicity as follows. After curing the photocatalyst-coated body in a dark place for 1 day, the photocatalyst-coated surface is left for 7 days under BLB light adjusted to 1 mW / cm 2, and the contact angle of the photocatalyst-coated surface is measured with a contact angle meter (Kyowa Interface) It was measured by Kagaku CA-X150). The contact angle was measured using a hydrophilic substitute.
  • Examples 40 and 41 Evaluation of sliding wear resistance
  • the photocatalyst coating body provided with the photocatalyst layer was manufactured as follows. First, a colored organic coated body was prepared as a base material. This colored organic coated body is obtained by applying general-purpose acrylic silicone added with carbon black powder to a slate plate treated with an epoxy resin and sufficiently drying and curing it. On the other hand, a copper / silver-containing titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are shown in T-17 and T-21 of Table 1. The photocatalyst coating composition was obtained by mixing at a blending ratio.
  • this photocatalytic coating composition does not contain hydrolyzable silicone.
  • the total solid concentration of the photocatalyst and the inorganic oxide in the photocatalyst coating composition was 5.5% by mass. Further, the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month. In all cases, no precipitation or discoloration was observed, and the composition was stable.
  • the obtained photocatalyst coating composition was spray-applied on the colored organic coating body heated in advance and dried at 120 ° C.
  • a photocatalyst layer was formed to obtain a photocatalyst-coated body.
  • the film thickness of the photocatalyst layer was measured by observation with a scanning electron microscope, it was about 1 ⁇ m in both Examples 40 and 41.
  • the photocatalyst-coated body thus obtained was subjected to a washing resistance test as follows.
  • the test method was performed according to JIS A6909.
  • the photocatalyst-coated body was fixed horizontally on a test stand of a cleaning tester (No. 458, Washability Tester, manufactured by Toyo Seiki Seisakusho) with the photocatalyst-coated surface facing upward.
  • the tip of a pork brush with a dry brush weight of 450 g was immersed in a 0.5% solution of soapy water, placed on the photocatalyst coating surface, reciprocated 500 times, then removed, washed with water and dried.
  • the well-dried photocatalyst-coated body was irradiated with BLB light adjusted to 3 mW / cm 2 for 24 hours, and then the contact angle of the photocatalyst-coated surface was measured with a contact angle meter (CA-X150, manufactured by Kyowa Interface Science). The contact angle was measured using a hydrophilic substitute.
  • Examples 42 to 45 Evaluation of harmful gas decomposability
  • the photocatalyst coating body provided with the photocatalyst layer was manufactured as follows. First, a colored organic coated body was prepared as a base material. This colored organic coated body is obtained by applying general-purpose acrylic silicone to which carbon black powder is added on a float plate glass and sufficiently drying and curing it. On the other hand, a copper / silver-containing titania aqueous dispersion as a photocatalyst, a water-dispersed colloidal silica as an inorganic oxide, water as a solvent, and a surfactant are listed in Table 9, T-9, T-17 and T- A photocatalytic coating composition was obtained by mixing at a blending ratio of 20.
  • this photocatalytic coating composition does not contain hydrolyzable silicone.
  • the total solid concentration of the photocatalyst and the inorganic oxide in the photocatalyst coating composition was 5.5% by mass. Further, the obtained photocatalyst coating composition was observed after being allowed to stand at room temperature for 1 month. In all cases, no precipitation or discoloration was observed, and the composition was stable.
  • the obtained photocatalyst coating composition was spray-applied on the colored organic coating body heated in advance and dried at 120 ° C. Thus, a photocatalyst layer was formed to obtain a photocatalyst-coated body.
  • the film thickness of the photocatalyst layer was measured by observation with a scanning electron microscope, the values shown in Table 11 were obtained.
  • the photocatalyst-coated body having a size of 50 ⁇ 100 mm thus obtained was subjected to a gas decomposability test as follows.
  • the photocatalyst-coated body was irradiated with 1 mW / cm 2 of BLB light for 12 hours or more.
  • One coated body sample was set in the reaction vessel described in JIS R1701. NO gas was mixed with air adjusted to 25 ° C. and 50% RH so as to be about 1000 ppb, and introduced into a light-shielded reaction vessel for 20 minutes. Thereafter, BLB light adjusted to 3 mW / cm 2 was irradiated for 20 minutes while the gas was introduced. Thereafter, the reaction vessel was shielded from light again with the gas introduced.
  • NOx removal amount [NO (after irradiation) ⁇ NO (at irradiation)] ⁇ [NO 2 (at irradiation) ⁇ NO 2 (after irradiation)]
  • the powder obtained by drying this sol at 100 ° C. was measured by a powder X-ray diffraction method, a peak of anatase-type titanium oxide was observed. Further, in order to evaluate the degree of discoloration of the obtained sol, the color quality index ⁇ L value was calculated to be 4.82. In addition, the obtained sol increased in viscosity and gelled after 7 days during storage at room temperature.

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Abstract

L'invention concerne une composition de revêtement de photocatalyseur qui a une excellente stabilité sous forme d’un agent liquide et permet la formation d’un revêtement de photocatalyseur ayant une excellente résistance aux intempéries, une excellente aptitude à décomposer des gaz toxiques, un excellent effet d'inhibition sur la propagation de champignons ou d'algues et d’autres caractéristiques souhaitées (telles que la transparence et la résistance du film), tout en empêchant l’érosion dans la matière de base. La composition de revêtement de photocatalyseur contient, dans un solvant, des particules d’oxyde de titane, des particules d’oxyde inorganique, du cuivre élémentaire, de l’argent élémentaire et un hydroxyde d’ammonium quaternaire et facultativement un silicone hydrolysable. Étant donné que le sol d’oxyde de titane photocatalyseur, qui est la matière première de la composition de revêtement de photocatalyseur, contient un hydroxyde d’ammonium quaternaire, le cuivre et l’argent peuvent être dispersés de façon stable dans la composition.
PCT/JP2009/056530 2008-04-01 2009-03-30 Composition de revêtement de photocatalyseur WO2009123135A1 (fr)

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CN105948496A (zh) * 2016-04-29 2016-09-21 中材江西电瓷电气有限公司 西北地区瓷绝缘子用无机防尘釉料及其制备方法和应用

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JP4880410B2 (ja) * 2006-09-28 2012-02-22 多木化学株式会社 光触媒コーティング組成物が被覆された部材
JP2015160892A (ja) * 2014-02-27 2015-09-07 独立行政法人国立高等専門学校機構 バイオフィルム形成能を抑えた防汚コンポジット皮膜
JP6953965B2 (ja) 2017-09-29 2021-10-27 信越化学工業株式会社 抗菌・抗カビ性を有する光触媒・合金微粒子分散液、その製造方法、及び光触媒・合金薄膜を表面に有する部材

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WO2000006300A1 (fr) * 1998-07-30 2000-02-10 Toto Ltd. Procede de production d'un materiau haute performance a fonction photocatalytique et dispositif y relatif
JP2000051708A (ja) * 1998-08-10 2000-02-22 Showa Alum Corp 光触媒皮膜およびその形成方法
JP2007320839A (ja) * 2006-06-05 2007-12-13 Taki Chem Co Ltd アルカリ型酸化チタンゾル及びその製造方法
JP2008080253A (ja) * 2006-09-28 2008-04-10 Taki Chem Co Ltd 光触媒酸化チタンゾル及びこれを用いたコーティング組成物並びに部材

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WO2000006300A1 (fr) * 1998-07-30 2000-02-10 Toto Ltd. Procede de production d'un materiau haute performance a fonction photocatalytique et dispositif y relatif
JP2000051708A (ja) * 1998-08-10 2000-02-22 Showa Alum Corp 光触媒皮膜およびその形成方法
JP2007320839A (ja) * 2006-06-05 2007-12-13 Taki Chem Co Ltd アルカリ型酸化チタンゾル及びその製造方法
JP2008080253A (ja) * 2006-09-28 2008-04-10 Taki Chem Co Ltd 光触媒酸化チタンゾル及びこれを用いたコーティング組成物並びに部材

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CN105948496A (zh) * 2016-04-29 2016-09-21 中材江西电瓷电气有限公司 西北地区瓷绝缘子用无机防尘釉料及其制备方法和应用

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