WO2010143645A1 - 常温硬化性近赤外線遮蔽コーティング剤及びそれを用いた近赤外線遮蔽膜並びにその製造方法 - Google Patents
常温硬化性近赤外線遮蔽コーティング剤及びそれを用いた近赤外線遮蔽膜並びにその製造方法 Download PDFInfo
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- infrared shielding
- coating agent
- room temperature
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- 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
- C09D5/32—Radiation-absorbing paints
-
- 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
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
- C03C17/3417—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials all coatings being oxide coatings
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- 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
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
-
- 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
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
- C08K5/5455—Silicon-containing compounds containing nitrogen containing at least one group
-
- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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- 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
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- 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
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- 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
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- 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
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
- C08K5/5419—Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond
Definitions
- the present invention relates to a coating agent that shields near infrared rays that can be cured at room temperature. Moreover, it is related with the near-infrared shielding film obtained using the near-infrared shielding coating agent, and its manufacturing method. Further, an article in which the near-infrared shielding film is formed on a substrate, an article in which a photocatalytic film is formed on the near-infrared shielding film, an article in which a photocatalytic film is formed on a surface different from the surface on which the near-infrared shielding film is formed, and those It relates to a manufacturing method.
- near-infrared shielding materials examples include tin oxide, antimony-doped tin oxide, indium oxide, tin-doped indium oxide, zinc oxide, aluminum-doped zinc oxide, lanthanum boride, cerium oxide, ruthenium oxide, and tungsten oxide.
- the material is known.
- Metal materials such as silver, copper, and aluminum are also known.
- composition is applied on the surface of a glass substrate, semi-cured at a temperature of 200 ° C. or lower, and further thereon.
- a glass with an infrared shielding film is manufactured by applying a composition containing a polysilazarane compound and then heat-treating it at a temperature of 400 ° C. or higher and 750 ° C. or lower.
- Patent Document 3 describes a polymer substance obtained by reacting a silane compound containing an amino group with a boron compound. Further, alkoxysilanes such as tetramethoxysilane and tetraethoxysilane, and polycondensation thereof. It also describes the addition of products.
- Patent Document 4 describes that when a substance obtained by mixing and reacting a glycidoxypropyl group-containing alkoxysilane and an aminopropyl group-containing alkoxysilane is used, it can be cured at room temperature.
- Patent Documents 1 and 2 describe that a tetrafunctional silicon compound of tetraalkoxysilane, a trifunctional silicon compound of alkyltrialkoxysilane, a mixture thereof, a hydrolyzate thereof, or a condensation polymer thereof is used as a binder.
- the coating film hardness is high, it is difficult to cure at room temperature, so heating is required.
- contraction becomes large when it heat-hardens, there exists a problem that a crack arises in the coating-film surface.
- a polymer substance obtained by reacting a silane compound containing an amino group with a boron compound is used as a binder.
- the present invention is easy to prepare a binder, does not require heating at a temperature of 200 ° C. or higher, and can cure the binder at a room temperature of about 5 to 40 ° C.
- the coating agent which can form is provided.
- the present invention provides a near-infrared shielding film that can be produced at room temperature, has high coating film hardness, and is less prone to cracking, and a method for producing the same.
- an article in which the near infrared shielding film is formed on a substrate, an article in which a photocatalytic film is formed on the near infrared shielding film, an article in which a photocatalytic film is formed on a surface different from the surface on which the near infrared shielding film is formed, and A manufacturing method thereof is provided.
- the present inventors use three types of tetrafunctional silicon compounds, trifunctional silicon compounds, and silane coupling agents to reduce the coating film hardness. It was found that a desired near-infrared shielding film that is high and hardly cracked can be formed, and the present invention has been completed.
- the present invention includes (1) an inorganic near-infrared absorber and (2) a general formula Si (OR1) 4 ; wherein R1 is the same or different and is an alkyl group having 1 to 10 carbon atoms. (3) General formula R2Si (OR3) 3 ; (wherein R2 and R3 are the same or different and each has the number of carbon atoms; At least one selected from trifunctional silicon compounds represented by (1 to 10 alkyl groups), hydrolysates thereof and polycondensates thereof, and (4) general formula Si (X) 3 —Y or R 4 Si (X ) 2 -Y; (in the formula, X is the same or different, an alkoxy group, an acetoxy group or a chlorine atom, R4 is an alkyl group having 1 to 10 carbon atoms, Y is an alkyl group, an alkoxy group and acetoxy A silane coupling agent represented by (1), a hydrolyzate thereof and a polycondensation product thereof, and (5) a solvent
- the present invention provides an article characterized in that a near-infrared shielding film is formed by applying the near-infrared shielding coating agent to at least one surface of a substrate, and also on the near-infrared shielding film.
- a photocatalytic film is formed on at least a part of the substrate, and the near-infrared shielding coating agent is applied to one surface of the substrate to form a near-infrared shielding film. In this article, a photocatalytic film is formed on the surface.
- the present invention also provides a method for producing a near-infrared shielding film or article, wherein the near-infrared shielding coating agent is applied to at least one surface of a substrate and dried at room temperature.
- a method for producing an article wherein a coating agent is applied to at least one surface of a substrate, and then a coating agent containing a photocatalyst is applied thereon and dried. Further, the near infrared shielding coating agent is applied to the substrate. And a coating agent containing a photocatalyst is applied to the other surface of the substrate and dried.
- the near-infrared shielding coating agent of the present invention can produce a near-infrared shielding film at a room temperature of about 5 to 40 ° C. and can be applied to a heat-fragile substrate such as plastic. Shielding ability can be imparted.
- the near-infrared shielding film produced using the above-mentioned near-infrared shielding coating agent has a high near-infrared shielding ability, has a high coating film hardness, and does not easily cause cracks.
- the binder itself itself has a high visible light transmittance. Therefore, a highly transparent near-infrared shielding film can be obtained by selecting a highly transparent inorganic near-infrared absorber.
- Such a transparent near-infrared shielding film can impart a near-infrared shielding ability not only to transparent materials such as glass and plastic, but also to opaque materials such as steel and ceramics, coloring materials, and materials with designs. it can.
- a near infrared shielding film can be produced by a relatively simple method such as applying the above-mentioned near infrared shielding coating agent to a substrate and then forming a film at a temperature in the range of 5 to 40 ° C.
- Near-infrared shielding ability can be directly imparted to places that are difficult to operate, such as building windows, show windows, sunroofs, roofs, walls, automobiles, train windows, etc.
- the near-infrared shielding film can be combined with a photocatalyst film, and in addition to the near-infrared shielding ability, the photocatalytic function imparts hydrophilicity, antifogging property, and antifouling property to the substrate, and it can be used as a bad odor or harmful substance. It is possible to decompose things.
- the room temperature curable near-infrared shielding coating agent of the present invention comprises (1) an inorganic near-infrared absorber and (2) a general formula Si (OR1) 4 ; (wherein R1 is the same or different and has 1 to 10 carbon atoms. (3) General formula R2Si (OR3) 3 ; (wherein R2 and R3 are R4Si (OR3) 3 ) and at least one selected from a tetrafunctional silicon compound represented by the following formula: (4) general formula Si (X), and at least one selected from trifunctional silicon compounds represented by the same or different, each of which is an alkyl group having 1 to 10 carbon atoms, a hydrolyzate thereof, and a polycondensate thereof.
- R4Si (X) 2 -Y (in the formula, X is the same or different, an alkoxy group, an acetoxy group or a chlorine atom, R4 is an alkyl group having 1 to 10 carbon atoms, Y is alkyl , A silane coupling agent represented by an organic group except an alkoxy group and an acetoxy group), and at least one selected from a hydrolyzate thereof and a polycondensate, containing a (5) a solvent.
- the inorganic near infrared absorber (1) known ones can be used. Specifically, tin oxide, antimony-doped tin oxide, indium oxide, tin-doped indium oxide, zinc oxide, aluminum-doped zinc oxide, An oxide material such as lanthanum boride, cerium oxide, ruthenium oxide, or tungsten oxide, or a metal material such as silver, copper, or aluminum can be used.
- the near-infrared absorber preferably has a high visible light transmittance when formed into a coating film, and such a near-infrared absorber is selected from the group consisting of tin oxide, indium oxide, zinc oxide and lanthanum boride.
- Fine particles mainly containing at least one kind are preferable, and antimony-doped tin oxide fine particles having higher transparency are more preferable.
- the particle diameter of the fine particles is preferably about 0.01 to 0.1 ⁇ m, more preferably 0.01 to 0.03 ⁇ m. If it is larger than 0.1 ⁇ m, the transparency may be lowered.
- the content of the inorganic near infrared absorber is preferably 40 to 90% by weight, more preferably 60 to 80% by weight, and more preferably 70 to 80% by weight based on the total solid content of the coating agent. If the content is less than 40% by weight, the near-infrared shielding ability decreases, which is not preferable. If the content is more than 90% by weight, the coating film hardness tends to be low, which is not preferable.
- the component (2) is at least one selected from a tetrafunctional silicon compound represented by the general formula Si (OR1) 4 , a hydrolyzate thereof and a polycondensate thereof (hereinafter referred to as a tetrafunctional silicon compound).
- a tetrafunctional silicon compound represented by the general formula Si (OR1) 4 , a hydrolyzate thereof and a polycondensate thereof (hereinafter referred to as a tetrafunctional silicon compound).
- R1 is an alkyl group having 1 to 10 carbon atoms, and four R1s may be the same or different.
- R1 is preferably one having 1 to 5 carbon atoms, which is susceptible to hydrolysis and condensation polymerization.
- a monomer of a tetrafunctional silicon compound is preferable, but hydrolysis and condensation polymerization may proceed during storage of the coating agent.
- the product which hydrolyzed the monomer of the tetrafunctional silicon compound previously may be sufficient.
- a product obtained by previously hydrolyzing and condensation polymerizing a monomer of a tetrafunctional silicon compound for example, an oligomer having a degree of polymerization of about 2 to 20, preferably an oligomer having a degree of 2 to 10 may be used.
- Specific examples of such compounds include monomers such as tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, and tetrabutoxysilane, their hydrolysates, and hydrolyzed / condensed polymers.
- the component (3) is at least one selected from a trifunctional silicon compound represented by the general formula R2Si (OR3) 3 , a hydrolyzate thereof and a polycondensation product thereof (hereinafter referred to as trifunctional silicon compounds).
- R2 is an alkyl group having 1 to 10 carbon atoms.
- R3 is an alkyl group having 1 to 10 carbon atoms, and each of the three R3s may be the same or different, and may be the same as or different from R2.
- R3 is preferably one having 1 to 5 carbon atoms, which is susceptible to hydrolysis and condensation polymerization.
- Trifunctional silicon compound monomers are preferred, but hydrolysis and condensation polymerization may proceed during storage of the coating agent.
- the product which hydrolyzed the monomer of the trifunctional silicon compound previously may be sufficient.
- a product obtained by previously hydrolyzing and polycondensing a monomer of a trifunctional silicon compound for example, an oligomer having a degree of polymerization of about 2 to 20, preferably an oligomer having a degree of 2 to 10 may be used.
- Such compounds include methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, ethyltripropoxysilane, and ethyltributoxysilane.
- the weight ratio of the respective components of the tetrafunctional silicon compound (2) and the trifunctional silicon compound (3) is preferably 1: 1 to 1:10. It is possible to form a coating film that is unlikely to crack.
- the component (4) is at least one selected from a silane coupling agent represented by the general formula Si (X) 3 —Y or R 4 Si (X) 2 —Y, a hydrolyzate thereof, and a polycondensate thereof. (Hereinafter, it may be called silane coupling agents.)
- a silane coupling agent represented by the general formula Si (X) 3 —Y or R 4 Si (X) 2 —Y, a hydrolyzate thereof, and a polycondensate thereof.
- silane coupling agents In the general formula Si (X) 3 —Y, X is an alkoxy group, an acetoxy group or a chlorine atom, and the three Xs may be the same or different, and Y is an alkyl group. Group, an organic group excluding an alkoxy group and an acetoxy group.
- R4 is an alkyl group having 1 to 10 carbon atoms
- X is an alkoxy group, an acetoxy group, or a chlorine atom
- Y may be an organic group excluding an alkyl group, an alkoxy group and an acetoxy group.
- the alkoxy group of X is preferably an alkoxy group having 1 to 10 carbon atoms, and examples thereof include a methoxy group, an ethoxy group, a butoxy group, and a methoxyethoxy group.
- Examples of the organic group Y include those having a vinyl group, epoxy group, amino group, ureido group, methacryl group, acrylic group, sulfide group, mercapto group, ketimino group, isocyanate group, chloropropyl group, styryl group, and the like. It is done.
- An organic group having an epoxy group, an amino group, or a ureido group is more preferable because it has a high coating film hardness and can form a coating film in which cracks hardly occur.
- a monomer of a silane coupling agent is preferable, hydrolysis and condensation polymerization may proceed during storage of the coating agent.
- the product which hydrolyzed the monomer of the silane coupling agent previously may be sufficient.
- a product obtained by previously hydrolyzing and condensation-polymerizing the monomer of the silane coupling agent for example, an oligomer having a polymerization degree of about 2 to 20, preferably an oligomer having a degree of 2 to 10 may be used.
- silane coupling agent having a vinyl group examples include vinyltrimethoxysilane (KBM-1003; manufactured by Shin-Etsu Chemical Co., Ltd., Z-6300; manufactured by Tokyo Chemical Industry Co., Ltd.), vinyltriethoxysilane (KBE-1003; manufactured by Shin-Etsu Chemical Co., Ltd.), Z -6519; Tokyo Chemical Industry), vinyl triisopropoxysilane (Z-6550; Tokyo Chemical Industry), allyltrimethoxysilane (Z-6825; Tokyo Chemical Industry), vinyltriacetoxysilane (Z-6075; Tokyo) Kasei Kogyo) and vinyl tris (2-methoxyethoxy) silane (Z-6172; manufactured by Tokyo Kasei Kogyo).
- silane coupling agent having an epoxy group examples include 3-glycidoxypropyltrimethoxysilane (KBM-403; manufactured by Shin-Etsu Chemical Co., Ltd., Z-6040; manufactured by Tokyo Chemical Industry Co., Ltd.), 3-glycidoxypropyltriethoxysilane ( KBE-403; manufactured by Shin-Etsu Chemical Co., Ltd., Z-6041; manufactured by Tokyo Chemical Industry Co., Ltd.), 3-glycidoxypropylmethyldiethoxysilane (KBE-402; manufactured by Shin-Etsu Chemical Co., Ltd., Z-6042; manufactured by Tokyo Chemical Industry Co., Ltd.), 3 -Glycidoxypropylmethyldimethoxysilane (Z-6044; manufactured by Tokyo Chemical Industry), 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane (Z-6043; manufactured by Tokyo Chemical Industry), and the like.
- KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd
- silane coupling agent having an amino group examples include 3-aminopropyltrimethoxysilane (KBM-903; manufactured by Shin-Etsu Chemical Co., Ltd., Z-6610; manufactured by Tokyo Chemical Industry Co., Ltd.), 3-aminopropyltriethoxysilane (KBE).
- silane coupling agent having a ureido group examples include 3-ureidopropyltriethoxysilane (KBE-585; manufactured by Shin-Etsu Chemical Co., Ltd., Z-6675, Z-6676; manufactured by Tokyo Chemical Industry Co., Ltd.).
- silane coupling agent having a methacryl group examples include 3-methacryloxypropylmethyldimethoxysilane (KBE-502; manufactured by Shin-Etsu Chemical Co., Ltd., Z-6033; manufactured by Tokyo Chemical Industry Co., Ltd.), 3-methacryloxypropyltrimethoxysilane (KBM- 503; manufactured by Shin-Etsu Chemical Co., Ltd., Z-6030; manufactured by Tokyo Chemical Industry Co., Ltd.), 3-methacryloxypropyltriethoxysilane (Z-6036; manufactured by Tokyo Chemical Industry Co., Ltd.), and the like.
- silane coupling agent having an acrylic group examples include 3-acryloxypropyltrimethoxysilane (KBM-5103; manufactured by Shin-Etsu Chemical Co., Ltd., Z-6530; manufactured by Tokyo Chemical Industry Co., Ltd.).
- the content of the silane coupling agent (4) is preferably 1 to 30% by weight with respect to the total amount of the tetrafunctional silicon compound (2) and the trifunctional silicon compound (3). Within this range, curing at room temperature of about 5 to 40 ° C. proceeds, and a coating film having high coating film hardness and hardly causing cracks can be formed. If the content is less than 1% by weight, it is not preferable because curing at room temperature of about 5 to 40 ° C. is difficult to proceed.
- the solvent of (5) can be appropriately selected.
- polar solvents such as water, alcohol, nitrile, amide, ketone and sulfoxide are preferable, and drying at low temperature is facilitated. Those are preferred, and at least one selected from water and alcohol is more preferred.
- the alcohol include methanol, ethanol, propanol, butanol and the like.
- the amount of solvent is not particularly limited, and is appropriately set in consideration of application conditions, application environment, and the like.
- the near-infrared shielding coating agent of the present invention hydrolyzes the tetrafunctional silicon compounds (2), trifunctional silicon compounds (3) or silane coupling agents (4).
- a catalyst for condensation polymerization may be added. Examples of the catalyst include acids and alkalis, and acetic acid, sodium acetate and the like can be used.
- the room temperature curable near-infrared shielding coating agent of the present invention may contain an ultraviolet shielding agent.
- the UV screening agent may be any UV-A or UV-B blocking agent, for example, organic UV screening agents such as benzophenone derivatives, paraaminobenzoic acid derivatives, paramethoxycinnamic acid derivatives, salicylic acid derivatives, dibenzoylmethane derivatives, etc.
- organic UV screening agents such as benzophenone derivatives, paraaminobenzoic acid derivatives, paramethoxycinnamic acid derivatives, salicylic acid derivatives, dibenzoylmethane derivatives, etc.
- inorganic ultraviolet shielding agents such as phosphoric acid compounds such as iron phosphate, titanium phosphate, cerium phosphate, and zinc phosphate, and composite phosphate compounds using two or more of the above phosphoric acid compounds.
- the inorganic ultraviolet shielding agent is preferably fine particles having a small particle size, more preferably those having an average particle size of 200 nm or less, and still more preferably those having an average particle size of 100 nm or less.
- the reason why the fine particles are preferable is that the transparency of the coating film containing the fine particles is not significantly reduced.
- an ultraviolet shielding agent that shields ultraviolet rays having a wavelength of 365 nm because insects can be prevented from flying.
- ultraviolet shielding agents include Pulsol A, iron oxyhydroxide, iron oxide, dioxide dioxide. Titanium, zinc oxide, titanium phosphate, cerium phosphate, or the like can be used.
- the addition amount of the catalyst and the ultraviolet shielding agent is appropriately set according to the purpose.
- a resin binder In addition, a resin binder, a dispersant, a surface conditioner (leveling agent, wettability improver), a pH adjuster, an antifoaming agent, an emulsifier, a colorant, a bulking agent, an antifungal agent, as long as the effects of the present invention are not impaired. Further, various additives such as curing aids and thickeners, fillers and the like may be included as the third component.
- the resin binder include organic binders such as alkyd resins, acrylic resins, polyester resins, epoxy resins, fluorine resins, and modified silicone resins.
- Dispersants include (1) surfactants ((a) anionic (carboxylates, sulfates, sulfonates, phosphates, etc.), (b) cationics (alkylamine salts, alkylamines) Quaternary ammonium salt, aromatic quaternary ammonium salt, heterocyclic quaternary ammonium salt, etc.), (c) amphoteric (betaine type, amino acid type, alkylamine oxide, nitrogen-containing heterocyclic type, etc.), (d) nonionic type ( Ether type, ether ester type, ester type, nitrogen-containing type, etc.) (2) Silicone dispersant (alkyl modified polysiloxane, polyoxyalkylene modified polysiloxane, etc.), (3) Phosphate dispersant (phosphorus) Acid sodium, sodium pyrophosphate, sodium orthophosphate, sodium metaphosphate, sodium tripolyphosphate, etc.), (4) alkanolamine (Aminomethylpropanol,
- the near-infrared shielding coating agent of the present invention can be produced by mixing a predetermined amount of each of the above components (1) to (5). If necessary, a catalyst, an ultraviolet shielding agent or the above-mentioned third component can be added during mixing.
- the mixing method is not particularly limited. For example, a paint conditioner, a colloid mill, a ball mill, a sand mill, a homomixer, or the like can be used to disperse the inorganic near-infrared absorber.
- the near-infrared shielding coating agent As a method for applying the near-infrared shielding coating agent to the substrate, conventional methods can be used, such as spin coating, spray coating, roller coating, dip coating, flow coating, knife coating, electrostatic coating, bar coating, General methods such as die coating, brush coating, and sponge coating can be used. If it is dip coating, a near infrared shielding film can be produced on both sides of the substrate. If it is spin coating, spray coating, roller coating, flow coating, brush coating, sponge coating, etc., a near infrared shielding film is formed on one surface of the substrate. Can be produced. If the film thickness is to be increased, overcoating may be performed. If the solvent is removed from the applied material, a near-infrared shielding film is formed.
- Film formation is preferably performed at room temperature in the range of 5 to 40 ° C.
- the film formation may be advanced by sending warm air or cold air during film formation. Further, heating may be performed as necessary, and the heating temperature can be appropriately set according to the heat resistance of the substrate and the like, specifically in the range of 40 to 500 ° C., preferably in the range of 40 to 200 ° C. It is.
- the thickness of the near-infrared shielding film can be arbitrarily selected by appropriately selecting a coating method. For example, a thickness in the range of 1 to 10 nm is preferable because visible light transmittance can be increased, and more preferably 2 to 3 nm.
- the substrate for forming the near-infrared shielding film various materials and various shapes can be used.
- various materials such as plastic, glass, ceramic, metal, wood, and fiber can be used.
- opaque materials such as steel and ceramics, colored materials, materials with designs, and the like can also be used as the substrate.
- a glass plate or a plastic plate can be suitably used as a base, and the near infrared ray shielding film of the present invention is formed on a building window, a show window, a sunroof, etc., a window of an automobile, a train, etc. Can be used.
- a near-infrared shielding film is formed on windows, show windows, sunroofs, roofs, walls, etc., windows of automobiles, trains, etc. can do.
- a primer layer may be previously formed on the substrate for the purpose of improving the adhesion between the near-infrared shielding film and the substrate or protecting the substrate, and protecting the near-infrared shielding film, etc.
- a top coat layer may be formed on the film.
- Various inorganic binders, organic binders, and the like can be used for forming the primer layer and the topcoat layer.
- a near infrared shielding film When the near infrared shielding coating agent is applied to at least one surface of the substrate, a near infrared shielding film can be formed.
- the performance of the near-infrared shielding film produced in this way depends on the performance of the inorganic near-infrared absorber, etc., but generally the following can be obtained.
- a solar transmittance measured by the following method is easily obtained with 85% or less, preferably 80% or less.
- a near-infrared shielding coating solution is applied to a glass plate (MATUNAMI, 53 ⁇ 76 ⁇ t1.3 mm), dried at room temperature, and an ultraviolet-visible near-infrared spectrophotometer V-570 (manufactured by JASCO Corporation). Spectralon (made by Labsphere) is used as a standard plate), the spectral transmittance is measured, and then the solar transmittance (wavelength 300 to 2500 nm) is calculated according to JIS R 3106.
- the visible light transmittance of the near-infrared shielding film measured by the following method can easily be 85% or more, and preferably 90% or more.
- the spectral transmittance is measured by the method (a), and the visible light transmittance (wavelength 380 to 780 nm) is calculated.
- the pencil hardness of the near-infrared shielding film measured by the following method is easily 2H, preferably 4H or more. Pencil hardness measurement method In accordance with JIS K5400, the tip of a pencil with different hardness is polished with sandpaper, and the glass plate with a near-infrared shielding film placed on the floor is kept at an angle of 45 ° and scratched slowly. If the pencil hardness is higher than the coating film, the surface of the coating film is scratched. Conversely, if the pencil hardness is small, the pencil core causes blade spillage.
- an article having a near infrared shielding film formed by applying a near infrared shielding coating agent to at least one surface of a substrate can be obtained.
- This article has a near-infrared shielding film formed on at least one surface of the substrate.
- a near-infrared shielding coating agent is applied to at least one surface of the substrate and dried at room temperature of about 5 to 40 ° C. Can be manufactured.
- a near infrared shielding film and a photocatalytic film can be combined. Specifically, it can be an article in which a photocatalytic film is formed on at least a part of the near-infrared shielding film.
- a photocatalytic film is formed on at least a part of the near-infrared shielding film by a known method.
- a method for forming the photocatalyst film a method of applying a coating agent containing a photocatalyst (hereinafter sometimes referred to as a photocatalyst coating agent) and drying is simple and preferable.
- the photocatalyst coating agent may be applied in a wet state, or the photocatalyst coating agent may be applied in a dry and dry state.
- the drying temperature is preferably a room temperature of about 5 to 40 ° C.
- an article having a near-infrared shielding film formed on one surface of a substrate and a photocatalyst film formed on the other surface of the substrate can be formed, and a photocatalytic film is formed on the substrate surface opposite to the near-infrared shielding film.
- the near-infrared shielding coating agent is applied to one surface of a substrate, and a photocatalytic film is formed on the other surface of the substrate by a known method.
- a method for forming the photocatalyst film a method of applying a photocatalyst coating agent and drying it is simple and preferable.
- the order of application of the near-infrared shielding coating agent and the application of the photocatalyst coating agent may be any.
- the drying temperature is preferably a room temperature of about 5 to 40 ° C.
- various materials and various shapes can be used as the substrate, but a glass plate or a plastic plate can be preferably used, and a highly transparent glass plate or plastic plate is versatile. taller than. Such articles can be used for building windows, show windows, sunroofs, etc., windows for automobiles, trains, and the like.
- a near-infrared shielding film or a photocatalytic film can be formed on a window of a building, a show window, a sunroof, etc., a window of an automobile, a train, etc. it can.
- the photocatalyst is a substance that develops a photocatalytic function when irradiated with light having energy greater than its band gap.
- Known metal compound semiconductors such as titanium oxide, zinc oxide, tungsten oxide, iron oxide, and strontium titanate 1 type, or 2 or more types can be used.
- titanium oxide having an excellent photocatalytic function, chemically stable and harmless is desirable.
- titanium oxide includes those commonly used as hydrous titanium oxide, hydrated titanium oxide, orthotitanic acid, metatitanic acid, titanium hydroxide, and any one of anatase type, brookite type, rutile type, etc. It may be a crystal form or a mixed crystal form thereof.
- At least one element selected from the group consisting of V, Fe, Co, Ni, Cu, Zn, Ru, Rh, Pt, Pd, and Ag is formed inside and / or on the surface thereof. These metals and / or compounds thereof may be contained.
- the particle diameter of the photocatalyst is preferably fine because it has an excellent photocatalytic function, more preferably in the range of 1 to 500 nm, still more preferably in the range of 1 to 400 nm, and most preferably in the range of 1 to 300 nm.
- a photocatalyst having a visible light response ability that is excited by irradiation with visible light can be applied.
- ultraviolet light that can excite a photocatalyst is only a few percent in natural light, so by making the photocatalyst a visible light responsive type, the natural light can be effectively used to effectively decompose the object to be treated. be able to.
- a known photocatalyst having a visible light response ability can be used.
- titanium oxide doped with different elements such as sulfur (S), nitrogen (N), carbon (C), etc.
- Photocatalytic function is developed in the visible light region such as solid solution of metal ions, platinum halide compounds and iron oxyhydroxide supported on the surface of titanium oxide particles, titanium oxide particles and iron oxide, tungsten oxide, etc.
- a compound obtained by combining a compound to be compounded, a compound in which the composition of titanium oxide and titanium is changed, and the like can be suitably used.
- the photocatalyst coating agent is a composition containing the photocatalyst, a binder, and a solvent, and a known coating agent can be used. Further, in the near-infrared shielding coating agent of the present invention, (1) using a photocatalyst instead of the inorganic near-infrared absorber, the tetrafunctional silicon compounds of (2), the trifunctional silicon compounds of (3), The photocatalytic coating agent using the silane coupling agents (4) and the solvent (5) can be preferably used. Such a photocatalyst coating agent does not require heating at a temperature of 200 ° C. or higher, and the binder can be cured at a room temperature of about 5 to 40 ° C. As a result, the coating film hardness is high at the room temperature and cracks are not easily generated. A photocatalytic film can be formed.
- the content of the photocatalyst is preferably 5 to 98% by weight, more preferably 25 to 98% by weight, based on the total solid content of the photocatalyst coating agent. If the content is less than 5% by weight, the photocatalytic function is lowered, which is not preferable. If the content is more than 98% by weight, the coating film hardness tends to be low, which is not preferable.
- Photocatalyst coating agents include resin binders, dispersants, surface conditioners (leveling agents, wettability improvers), pH adjusters, antifoaming agents, emulsifiers, colorants, extenders, fungicides, and curing aids. Further, various additives such as thickeners, third components such as fillers, and catalysts for hydrolysis and condensation polymerization may be included.
- the above-mentioned methods can be used, and the photocatalytic film is formed by removing the solvent from the applied material.
- Film formation is preferably performed at room temperature in the range of 5 to 40 ° C.
- the film formation may be advanced by sending warm air or cold air during film formation. Further, heating may be performed as necessary, and the heating temperature can be appropriately set according to the heat resistance of the substrate and the like, specifically in the range of 40 to 500 ° C., preferably in the range of 40 to 200 ° C. It is.
- the thickness of the photocatalyst film can be arbitrarily selected by appropriately selecting a coating method.
- a thickness in the range of 1 to 200 nm is preferable because visible light transmittance can be increased, and more preferably 50 to 50 nm. 100 nm.
- a primer layer may be previously formed on the substrate to which the photocatalyst coating agent is applied for the purpose of improving the adhesion between the photocatalyst film and the substrate or protecting the substrate, thereby protecting the photocatalyst film.
- a top coat layer may be formed on the film.
- Various inorganic binders, organic binders, and the like can be used for forming the primer layer and the topcoat layer.
- the hydrophilicity, antifogging property, and antifouling property can be imparted by irradiating the photocatalyst film with light having a wavelength having energy larger than the band gap.
- the water contact angle can be made 10 ° or less, preferably 5 ° or less, by light irradiation, preventing formation of droplets, prevention of clouding due to coagulation of water vapor, and adhesion of dirt. Can be prevented.
- water pollutants such as oil and organic substances
- air pollutants such as ammonia, mercaptans, aldehydes, amines, hydrogen sulfide, hydrocarbons, sulfur oxides, nitrogen oxides, bacteria, fungi, microorganisms, various dirt components, etc.
- a light source for irradiating light a light source capable of emitting light having energy higher than the band gap of the photocatalyst is used.
- natural light sources such as the sun
- artificial light sources such as ultraviolet lamps, black lights, mercury lamps, xenon lamps, fluorescent lamps, and incandescent lamps
- visible light responsive photocatalyst light including visible light can be used.
- the light irradiation amount, irradiation time, and the like can be appropriately set depending on the amount of the substance to be processed.
- Near-infrared shielding film performance test 1 2. The performance test of the near-infrared shielding film formed by the method was performed by the following method. The results are shown in Table 2.
- Abrasion resistance Steel wool is applied to the surface of the coating film with a load of 100 g, and the surface is rubbed 10 times to examine the degree of scratches on the surface.
- the visible light transmittance (wavelength: 380 to 780 nm) was calculated from the spectral transmittance, and found to be 93.0%.
- the result of measuring the pencil hardness of the sample according to JIS K5400 was 3H.
- a temperature sensor (Empex Meteorological Instruments, TD-8182) was installed.
- the near-infrared shielding coating agent of Example 1 is applied to a glass plate (MATUNAMI, 53 ⁇ 76 ⁇ t1.3 mm), and then a photocatalytic coating agent (Ishihara Sangyo ST-K253) is applied to the opposite surface of the glass plate. And dried at room temperature.
- a photocatalytic coating agent Ishihara Sangyo ST-K253
- the solar transmittance and the visible light transmittance were 79.1% and 92.9%, respectively.
- the contact angle of water after the sample was irradiated with black light having an ultraviolet intensity of 0.5 mW / cm 2 for 6 hours was 36 °, and the contact angle of water after being irradiated for 24 hours was measured. As a result, it was 5 °, and it was confirmed that the photocatalytic function was developed.
- the coating film hardness is high at room temperature of about 5 to 40 ° C., and cracks are not easily generated. It was found that a film can be produced. Further, it can be combined with a photocatalytic film, and it has been found that hydrophilicity and the like can be imparted to the substrate by a photocatalytic function in addition to the near infrared shielding ability.
- Example 6 In Example 1, iron oxyhydroxide fine particles (goethite, FeOOH, manufactured by Ishihara Sangyo Co., Ltd.) were used as the inorganic ultraviolet shielding agent, and PWC (weight ratio of the inorganic ultraviolet shielding agent to the total solid content of the solution) was 2.3. % In the same manner as in Example 1 except that it was added so as to obtain a near infrared ray shielding coating agent.
- PWC weight ratio of the inorganic ultraviolet shielding agent to the total solid content of the solution
- Example 7 In Example 1, titanium dioxide fine particles (TiO 2 , manufactured by Ishihara Sangyo Co., Ltd.) were further used as the inorganic ultraviolet shielding agent so that the PWC (weight ratio of the inorganic ultraviolet shielding agent to the total solid content of the solution) was 2.6%.
- a near infrared shielding coating agent was obtained in the same manner as in Example 1 except that it was added.
- the near-infrared shielding coating agent of Examples 6 and 7 was applied to a glass plate (manufactured by MATSANAMI, 53 ⁇ 76 ⁇ t1.3 mm) and dried at room temperature to produce a near-infrared shielding film.
- the solar radiation transmittance and the visible light transmittance were measured in the same manner as in the performance test 2 of the near-infrared shielding film. Further, the ultraviolet transmittance of the near infrared shielding film was measured by the following method.
- Example 6 and 7 each have a lower ultraviolet transmittance than that of Example 1 and have ultraviolet shielding properties.
- Example 6 had a low UV transmittance at 360 nm
- Example 7 had a low UV transmittance at 310 nm.
- the visible light transmittance and the solar radiation transmittance were not inferior to those of Example 1.
- the near-infrared shielding coating agent of the present invention can produce a near-infrared shielding film at a room temperature of about 5 to 40 ° C. and can be applied to a heat-fragile substrate such as plastic. Shielding ability can be imparted. If a near-infrared shielding film is formed on a member such as a window of a building, the near-infrared ray can be shielded to suppress an increase in internal temperature and improve the comfortability.
Abstract
Description
また、特許文献3には、アミノ基を含むシラン化合物とホウ素化合物とを反応させて得られる高分子物質を記載しており、更に、テトラメトキシシラン、テトラエトキシシラン等のアルコキシシラン、その縮重合物を添加することも記載している。また、特許文献4には、グリシドキシプロピル基含有アルコキシシランとアミノプロピル基含有アルコキシシランとを混合反応させた物質を用いると、常温で硬化可能であることを記載している。
また、特許文献3では、アミノ基を含むシラン化合物とホウ素化合物とを反応させて得られる高分子物質をバインダとして用いている。これらの化合物を混合すると数分から数十分で粘稠な液体となりその後、固化する。粘稠な液体となるためフィルム等への加工には適しているが、塗布に適しておらず、ローラ等の塗布に限られてしまうという問題がある。また、特許文献4では、グリシドキシプロピル基含有アルコキシシランとアミノプロピル基含有アルコキシシランとを反応させたものをバインダとして使用する。常温での硬化を実用的なものとするためには硬化触媒を用いて混合反応させてバインダを熟成させる必要があり、また、その熟成に長い時間が必要であるなどの問題がある。
また、前記の近赤外線遮蔽膜を基体上に形成した物品、近赤外線遮蔽膜上に光触媒膜を形成した物品、更には近赤外線遮蔽膜を形成した面と異なる面に光触媒膜を形成した物品及びそれらの製造方法を提供する。
また、本発明は、前記の近赤外線遮蔽コーティング剤を基体の少なくとも一つの面に塗布して、近赤外線遮蔽膜を形成していることを特徴とする物品、また、前記の近赤外線遮蔽膜上の少なくとも一部に光触媒膜を形成していることを特徴とする物品、更に、前記の近赤外線遮蔽コーティング剤を基体の一つの面に塗布して、近赤外線遮蔽膜を形成し、基体の他の面に光触媒膜を形成していることを特徴とする物品である。
また、本発明は、前記の近赤外線遮蔽コーティング剤を基体の少なくとも一つの面に塗布し、常温で乾燥させることを特徴とする近赤外線遮蔽膜又は物品の製造方法、また、前記の近赤外線遮蔽コーティング剤を基体の少なくとも一つの面に塗布し、次いで、その上に光触媒を含むコーティング剤を塗布し、乾燥させることを特徴とする物品の製造方法、更に、前記の近赤外線遮蔽コーティング剤を基体の一つの面に塗布し、基体の他の面に光触媒を含むコーティング剤を塗布し、乾燥させることを特徴とする物品の製造方法などである。
前記の近赤外線遮蔽コーティング剤を用いて作製した近赤外線遮蔽膜は、近赤外線遮蔽能が高く、しかも、塗膜硬度が高く、クラックが生じ難い。また、バインダ自体は可視光の透過性が高く、このため、透明性の高い無機系近赤外線吸収剤を選択することにより、透明性の高い近赤外線遮蔽膜が得られる。このような透明性近赤外線遮蔽膜は、ガラス、プラスチック等の透明材料のほかに、鋼、セラミック等の不透明材料、着色材料、意匠を施した材料等にも近赤外線遮蔽能を付与することができる。
また、前記の近赤外線遮蔽コーティング剤を基体に塗布し、次いで、5~40℃の範囲の温度下で成膜するなどの比較的簡便な方法により近赤外線遮蔽膜を製造することができ、加熱操作ができ難い場所、例えば、建築物の窓、ショーウインドー、サンルーフ、屋根、壁等や、自動車、電車等の窓、車体等に近赤外線遮蔽能を直接付与することができる。
また、前記の近赤外線遮蔽膜は、光触媒膜と組み合わせることができ、近赤外線遮蔽能に加えて、光触媒機能により親水性、防曇性、防汚性を基体に付与したり、悪臭物、有害物等を分解したりすることができる。
ビニル基を有するシランカップリング剤には、ビニルトリメトキシシラン(KBM-1003;信越化学工業製、Z-6300;東京化成工業製)、ビニルトリエトキシシラン(KBE-1003;信越化学工業製、Z-6519;東京化成工業製)、ビニルトリイソプロポキシシラン(Z-6550;東京化成工業製)、アリルトリメトキシシラン(Z-6825;東京化成工業製)、ビニルトリアセトキシシラン(Z-6075;東京化成工業製)、ビニルトリス(2-メトキシエトキシ)シラン(Z-6172;東京化成工業製)などがある。
エポキシ基を有するシランカップリング剤としては、3-グリシドキシプロピルトリメトキシシラン(KBM-403;信越化学工業製、Z-6040;東京化成工業製)、3-グリシドキシプロピルトリエトキシシラン(KBE-403;信越化学工業製、Z-6041;東京化成工業製)、3-グリシドキシプロピルメチルジエトキシシラン(KBE-402;信越化学工業製、Z-6042;東京化成工業製)、3-グリシドキシプロピルメチルジメトキシシラン(Z-6044;東京化成工業製)、2-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン(Z-6043;東京化成工業製)などがある。
アミノ基を有するシランカップリング剤の具体例としては、3-アミノプロピルトリメトキシシラン(KBM-903;信越化学工業製、Z-6610;東京化成工業製)、3-アミノプロピルトリエトキシシラン(KBE-903;信越化学工業製、Z-6011;東京化成工業製)、N-2-(アミノエチル)-3-アミノプロピル卜リメトキシシラン(KBM-603;信越化学工業製、Z-6020;東京化成工業製)、N-2-(アミノエチル)-3-アミノプロピルトリエトキシシラン(KBE-603;信越化学工業製)、N-2-(アミノエチル)-3-アミノプロピルメチルジメトキシシラン(KBM-602;信越化学工業製、Z-6023;東京化成工業製)、N-フェニル-3-アミノプロピルトリメトキシシラン(KBM-573;信越化学工業製、Z-6883;東京化成工業製)などがある。
ウレイド基を有するシランカップリング剤としては、3-ウレイドプロピルトリエトキシシラン(KBE-585;信越化学工業製、Z-6675、Z-6676;東京化成工業製)などがある。
メタクリル基を有するシランカップリング剤には、3-メタクリロキシプロピルメチルジメトキシシラン(KBE-502;信越化学工業製、Z-6033;東京化成工業製)、3-メタクリロキシプロピルトリメトキシシラン(KBM-503;信越化学工業製、Z-6030;東京化成工業製)、3-メタクリロキシプロピルトリエトキシシラン(Z-6036;東京化成工業製)などがある。
アクリル基を有するシランカップリング剤には、3-アクリロキシプロピルトリメトキシシラン(KBM-5103;信越化学工業製、Z-6530;東京化成工業製)などがある。
(a)下記の方法で測定した日射透過率は、85%以下のものが得られ易く、好ましくは80%以下である。
日射透過率の測定方法
近赤外線遮蔽コーティング液をガラス板(MATSUNAMI製、53×76×t1.3mm)に塗布し、常温乾燥させ、紫外可視近赤外分光光度計V-570(日本分光社製、標準板としてスペクトラロン<Labsphere社製>を使用)にて測定を行い、分光透過率を測定し、次いでJIS R 3106に準じて日射透過率(波長300~2500nm)を計算する。
(b)下記の方法で測定した近赤外線遮蔽膜の可視光透過率は、85%以上のものが得られ易く、好ましくは90%以上である。
可視光透過率の測定方法
前記(a)の方法により分光透過率を測定し、可視光透過率(波長380~780nm)を計算する。
(c)下記の方法で測定した近赤外線遮蔽膜の鉛筆硬度は、2Hのものが得られ易く、好ましくは4H以上である。
鉛筆硬度の測定方法
JIS K5400に準じて、硬さの違う鉛筆の先端をサンドペーパーで研磨して、床置きした近赤外線遮蔽膜付きガラス板から、45°の角度を保ち、ゆっくりと引掻く。塗膜より鉛筆硬度が大きければ、塗膜面に傷がつき、また逆に小さければ鉛筆の芯が刃こぼれを起こすことから、塗膜の硬度が勝った鉛筆硬度を塗膜硬度とした。
合成容器に水20重量部と酢酸6重量部を入れ、液温を0~10℃に保ちながら撹拌した。この中に表1に記載した成分配合比に基づく成分(a)~(d)を、総量で43.5重量部添加した。その際、各成分毎に少しずつ添加し、液温を10℃に保ちつつ16時間撹拌した。
その後、液温を20℃とし酢酸ナトリウム0.5重量部を添加し、この溶液の加熱残分量(溶液を120℃で1時間乾燥したあとの残分量)が25~26%になるようにn-プロパノールを添加した。
次に、前記の溶液に無機系近赤外線吸収剤としてアンチモンドープ酸化スズ(石原産業製、SN-100P)をPWC(溶液の全固形分に対する無機系近赤外線吸収剤の重量比率)が75%になるように添加し、RedDevil社製のペイントコンディショナーを用いて分散して、それぞれ近赤外線遮蔽コーティング剤を得た。
ソーダガラス板(MATSUNAMI製、53×76×t1.3mm)の表面をエタノールワイプした後、エアーブローを行い基体とした。前記の1.の実施例1~5、比較例1~3により合成された近赤外線遮蔽コーティング剤をそれぞれ塗料タンクに入れ、前記の基体を速度150~250mm/分で引き上げ、室温で乾燥して近赤外線遮蔽膜を基体上に形成した。
前記2.の方法により形成した近赤外線遮蔽膜の性能試験を次の方法により行った。結果を表2に示す。
(1)初期テープ密着性:塗装面にNTカッターでクロスの傷を入れ、その部分にセロハンテープを押し当て引きはがす。そして塗膜の剥離状況を確認する。
(2)塗膜乾燥性:塗装板作成後、室内に放置し30分後の乾燥状態を指触により調べる。
(3)耐摩耗性:スチールウールを100g荷重で塗膜表面にあて、10回表面をこすり表面の傷付き程度を調べる。
(4)経時クラック性:塗装板作成後、室内に10日間放置し塗膜のクラック状態を調べる。
実施例1の近赤外線遮蔽コーティング剤をガラス板(MATSUNAMI製、53×76×t1.3mm)に塗布し、常温乾燥させて作製した試料を用い近赤外線遮膜の日射透過率等を次の方法により測定した。
(1)日射透過率、可視光透過率の測定
前記の試料を紫外可視近赤外分光光度計V-570(日本分光社製、標準板としてスペクトラロン<Labsphere社製>を使用)にて測定を行い、分光透過率を測定し、次いで、JIS R 3106に準じて日射透過率(波長300~2500nm)を計算した結果、79.3%であった。
また、前記の分光透過率から可視光透過率(波長380~780nm)を計算した結果、93.0%であった。
(2)前記の試料の鉛筆硬度をJIS K5400に準じて測定した結果、3Hであった。
(3)人工太陽光照射装置SXL-501V1型(セリック社製、光源;キセノン球3連型500W)を用い、光源下、500mmの距離に前記の試料を配置し、試料の下50mmの所に温度センサー(エンペックス気象計社、TD-8182)を設置した。5分間、光照射したときの温度センサーの温度を測定し、ガラス板(MATSUNAMI製、53×76×t1.3mm)を用いた場合と比較した結果、前記の試料のほうが温度は低く、その差は10℃あった。このことから、近赤外線遮蔽膜を使用した場合、温度抑制効果が得られることがわかった。
この試料の日射透過率、可視光透過率を前記の方法で測定した結果、日射透過率79.1%、可視光透過率92.9%であった。
また、この試料に紫外線強度0.5mW/cm2のブラックライトを6時間照射した後の水の接触角を測定した結果36°であったが、24時間照射した後の水の接触角を測定した結果5°となり、光触媒機能が発現したことを確認した。
実施例1において、更に無機系紫外線遮蔽剤としてオキシ水酸化鉄微粒子(ゲーサイト、FeOOH、石原産業社製)をPWC(溶液の全固形分に対する無機系紫外線遮蔽剤の重量比率)が2.3%になるように添加すること以外は、実施例1と同様に行い、近赤外線遮蔽コーティング剤を得た。
実施例1において、更に無機系紫外線遮蔽剤として二酸化チタン微粒子(TiO2、石原産業社製)をPWC(溶液の全固形分に対する無機系紫外線遮蔽剤の重量比率)が2.6%になるように添加すること以外は、実施例1と同様に行い、近赤外線遮蔽コーティング剤を得た。
(4)紫外線透過率の測定
前記の試料を紫外可視近赤外分光光度計V-570(日本分光社製、標準板としてスペクトラロン<Labsphere社製>を使用)にて測定を行い、紫外線遮蔽能の基準として310nm、360nmの波長での分光透過率を測定した。
建築物の窓等の部材に近赤外線遮蔽膜を形成すると、近赤外線を遮蔽して内部温度の上昇を抑え居住性を向上させることができる。
Claims (18)
- (1)無機系近赤外線吸収剤と、
(2)一般式Si(OR1)4;(式中、R1は同一若しくは異なり、炭素数1~10のアルキル基である)で表される4官能シリコン化合物、その加水分解物及びその縮重合物から選ばれる少なくとも一種と、
(3)一般式R2Si(OR3)3;(式中、R2、R3はそれぞれ同一若しくは異なり、炭素数1~10のアルキル基である)で表される3官能シリコン化合物、その加水分解物及びその縮重合物から選ばれる少なくとも一種と、
(4)一般式Si(X)3-Y又はR4Si(X)2-Y;(式中、Xは同一若しくは異なり、アルコキシ基、アセトキシ基又は塩素原子を示し、R4は炭素数1~10のアルキル基であり、Yはアルキル基、アルコキシ基及びアセトキシ基を除く有機基を示す)で表されるシランカップリング剤、その加水分解物及びその縮重合物から選ばれる少なくとも一種と、
(5)溶媒とを含有することを特徴とする常温硬化性近赤外線遮蔽コーティング剤。 - 前記の(2)と(3)の成分の重量比が、1:1~1:10であることを特徴とする請求項1に記載の常温硬化性近赤外線遮蔽コーティング剤。
- 前記(4)の成分の含有量が、前記の(2)と(3)の成分の合計量に対して、1~30重量%であることを特徴とする請求項1に記載の常温硬化性近赤外線遮蔽コーティング剤。
- 前記(1)の無機系近赤外線吸収剤が酸化錫、酸化インジウム、酸化亜鉛、ホウ化ランタンの群から選ばれる少なくとも一種を主成分とする微粒子であることを特徴とする請求項1に記載の常温硬化性近赤外線遮蔽コーティング剤。
- 無機系近赤外線吸収剤がアンチモンドープ酸化錫微粒子であることを特徴とする請求項4に記載の常温硬化性近赤外線遮蔽コーティング剤。
- 前記(1)の無機系近赤外線吸収剤の含有量が、コーティング剤の固形分全量に対して40~90重量%であることを特徴とする請求項1に記載の常温硬化性近赤外線遮蔽コーティング剤。
- 更に紫外線遮蔽剤を含むことを特徴とする請求項1~6のいずれか一項に記載の常温硬化性近赤外線遮蔽コーティング剤。
- 請求項1~7のいずれか一項に記載の常温硬化性近赤外線遮蔽コーティング剤を基体の少なくとも一つの面に塗布して形成していることを特徴とする近赤外線遮蔽膜。
- 鉛筆硬度が2H以上であることを特徴とする請求項8に記載の近赤外線遮蔽膜。
- 可視光透過率が85%以上で、かつ日射透過率が85%以下であることを特徴とする請求項8に記載の近赤外線遮蔽膜。
- 請求項1~7のいずれか一項に記載の常温硬化性近赤外線遮蔽コーティング剤を基体の少なくとも一つの面に塗布し、常温で乾燥させることを特徴とする近赤外線遮蔽膜の製造方法。
- 請求項1~7のいずれか一項に記載の常温硬化性近赤外線遮蔽コーティング剤を基体の少なくとも一つの面に塗布して、近赤外線遮蔽膜を形成していることを特徴とする物品。
- 近赤外線遮蔽膜上の少なくとも一部に光触媒膜を形成していることを特徴とする請求項12に記載の物品。
- 基体の一つの面に近赤外線遮蔽膜を形成し、基体の他の面に光触媒膜を形成していることを特徴とする請求項12に記載の物品。
- 基体がガラス板又はプラスチック板であることを特徴とする請求項12~14のいずれか一項に記載の物品。
- 請求項1~7のいずれか一項に記載の常温硬化性近赤外線遮蔽コーティング剤を基体の少なくとも一つの面に塗布し、常温で乾燥させることを特徴とする物品の製造方法。
- 請求項1~7のいずれか一項に記載の常温硬化性近赤外線遮蔽コーティング剤を基体の少なくとも一つの面に塗布し、次いで、その上に光触媒を含むコーティング剤を塗布し、乾燥させることを特徴とする物品の製造方法。
- 請求項1~7のいずれか一項に記載の常温硬化性近赤外線遮蔽コーティング剤を基体の一つの面に塗布し、基体の他の面に光触媒を含むコーティング剤を塗布して、乾燥させることを特徴とする物品の製造方法。
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US9346993B2 (en) * | 2012-03-02 | 2016-05-24 | Arakawa Chemical Industries, Ltd. | Heat dissipating coating composition and heat dissipating coating film |
US20150010759A1 (en) * | 2012-03-02 | 2015-01-08 | Arakawa Chemical Industries, Ltd. | Heat dissipating coating composition and heat dissipating coating film |
JP2014034627A (ja) * | 2012-08-08 | 2014-02-24 | Daiko Technical:Kk | シリコーン塗料および遮熱構造透明基材 |
JP2014034628A (ja) * | 2012-08-08 | 2014-02-24 | Daiko Technical:Kk | シリコーン系塗料および遮熱構造透明基材 |
JP2015043061A (ja) * | 2013-02-19 | 2015-03-05 | 富士フイルム株式会社 | 近赤外線吸収性組成物、近赤外線カットフィルタおよびその製造方法、並びに、カメラモジュールおよびその製造方法 |
JP2017142502A (ja) * | 2013-02-19 | 2017-08-17 | 富士フイルム株式会社 | 近赤外線吸収性組成物、近赤外線カットフィルタおよびその製造方法、並びに、カメラモジュールおよびその製造方法 |
JP2015214816A (ja) * | 2014-05-09 | 2015-12-03 | ケイミュー株式会社 | 外壁材 |
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MY160129A (en) | 2017-02-28 |
US8932397B2 (en) | 2015-01-13 |
KR20120037389A (ko) | 2012-04-19 |
JPWO2010143645A1 (ja) | 2012-11-22 |
JP5851836B2 (ja) | 2016-02-03 |
SG176736A1 (en) | 2012-01-30 |
CN102803413B (zh) | 2015-09-16 |
KR101758934B1 (ko) | 2017-07-17 |
HK1176961A1 (en) | 2013-08-09 |
CN102803413A (zh) | 2012-11-28 |
US20120168649A1 (en) | 2012-07-05 |
TW201111459A (en) | 2011-04-01 |
TWI481677B (zh) | 2015-04-21 |
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