WO2012056953A1 - Miroir pour réfléchir la lumière solaire, et dispositif de réflexion pour génération d'électricité solaire - Google Patents

Miroir pour réfléchir la lumière solaire, et dispositif de réflexion pour génération d'électricité solaire Download PDF

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Publication number
WO2012056953A1
WO2012056953A1 PCT/JP2011/073985 JP2011073985W WO2012056953A1 WO 2012056953 A1 WO2012056953 A1 WO 2012056953A1 JP 2011073985 W JP2011073985 W JP 2011073985W WO 2012056953 A1 WO2012056953 A1 WO 2012056953A1
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Prior art keywords
resin
layer
silver
mirror
solar
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PCT/JP2011/073985
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English (en)
Japanese (ja)
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美佳 本田
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コニカミノルタオプト株式会社
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Priority to JP2012540795A priority Critical patent/JPWO2012056953A1/ja
Publication of WO2012056953A1 publication Critical patent/WO2012056953A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/82—Arrangements for concentrating solar-rays for solar heat collectors with reflectors characterised by the material or the construction of the reflector
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

Definitions

  • the present invention relates to a solar reflective mirror provided with a metal reflective layer and a solar power generation reflective device using the same.
  • Natural energy such as biomass energy, wind energy, and solar energy is currently being investigated as alternative energy alternatives to fossil fuel energy such as oil and natural gas, and is the most stable alternative energy for fossil fuels, and A large amount of natural energy is considered to be solar energy.
  • glass mirrors are easily damaged, and it is necessary to consider not to be injured at the damaged part when replacing them. In many cases, they are installed outdoors, and the work environment (wind, rain, sand, dust, etc.) ), And skill is required for replacement work at the time of replacement.
  • Patent Document 1 discloses a method of replacing a glass mirror with a resin reflection sheet.
  • the glass mirror When the glass mirror is replaced with a thin film made of resin, it can be wound in a roll shape, so that continuous film formation is possible and production efficiency can be increased.
  • the resinous film has a defect that the environmental resistance is inferior to that of glass.
  • an acrylic resin containing a UV absorber is bonded to the outermost surface with a pressure sensitive adhesive.
  • poor performance frequently occurs due to entrainment of bubbles or dust when two types of films are bonded.
  • it is stuck on a rigid plate to fix the shape when used, but this also causes a problem of air bubbles and dust mixing. For this reason, the yield cannot be kept low, and the cost increases as a whole.
  • Patent Document 2 a method of forming a highly reflective silver reflective layer on the surface of a metal plate by plating has been developed. It becomes difficult to install and replace. Moreover, although the silver reflection layer is formed on the surface of the metal plate, the result of the silver reflection layer depends on the surface processing accuracy of the metal plate and the coating accuracy of the binder.
  • Patent Document 2 As means for solving the problems listed in Patent Document 1 and Patent Document 2, a method of forming a reflective layer on the back surface of a resin plate as disclosed in Patent Document 3 and applying a protective layer to the surface of the reflective layer There is. Since the resin plate is light and does not break like glass, it has good transportability and workability.
  • Patent Document 3 cannot be used outdoors for a long time.
  • the long term is a period of one year or more.
  • the acrylic board has a large water absorption of 3%, and the outdoor environment such as a desert has a temperature difference between day and night, so that the acrylic resin board is repeatedly deformed by repeatedly absorbing and releasing moisture in the air.
  • Polycarbonate absorbs ultraviolet B waves (UV-B: wavelength 280 to 315 nm) contained in sunlight and causes a photochemical reaction to break the polymer chain, resulting in yellowing and cracking. Therefore, the performance cannot be maintained only by forming a reflective layer on a resin (plastic) plate as in Patent Document 3.
  • UV-B ultraviolet B waves
  • the present invention has been made in view of the above-described problems and circumstances, and its solution is a solar that can be manufactured with simple production equipment, has high regular reflectance, is inexpensive, lightweight, and has excellent weather resistance. It is to provide a light reflecting mirror. Moreover, it is providing the solar power generation reflective apparatus provided with the said solar reflective mirror.
  • a solar reflective mirror having a resin plate protective layer, a resin plate, a metal reflective layer, and a metal corrosion prevention layer, wherein the resin plate protective layer is inorganic oxide
  • a solar reflective mirror which is at least one of a film layer or a curable resin film layer containing an ultraviolet absorber.
  • the resin plate contains a resin selected from a resin group consisting of a methacrylic resin, a polycarbonate resin, and a polyethylene terephthalate resin.
  • the said resin board protective layer is the said curable resin film layer,
  • the said curable resin film layer contains a thermosetting resin or an ultraviolet curable resin,
  • a solar power generation reflecting device comprising the solar light reflecting mirror according to any one of the first to fifth aspects.
  • the present invention can provide a solar reflective mirror that can be manufactured with simple production equipment, has a high regular reflectance, is inexpensive, lightweight, and has excellent weather resistance. Moreover, the solar power generation reflective apparatus provided with the said solar reflective mirror can be provided.
  • the solar reflective mirror of the present invention is a solar reflective mirror having a configuration in which a resin plate protective layer, a resin plate, a metal reflective layer, and a metal corrosion prevention layer are provided in order from the side on which sunlight enters.
  • the resin plate protective layer is at least one of an inorganic oxide film layer or a curable resin film layer containing an ultraviolet absorber. This feature is a technical feature common to the inventions according to claims 1 to 6.
  • the resin plate contains a resin selected from the group consisting of a methacrylic resin, a polycarbonate resin, and a polyethylene terephthalate resin from the viewpoint of manifesting the effects of the present invention.
  • the metal reflection layer is formed by a wet method and contains silver or a silver alloy.
  • the resin plate protective layer has a gas barrier property.
  • the said curable resin film layer which is the said resin board protective layer contains a thermosetting resin or an ultraviolet curable resin.
  • the solar light reflecting mirror of the present invention can be suitably used for a solar power generation reflecting device.
  • ⁇ is used to mean that the numerical values described before and after it are included as a lower limit value and an upper limit value.
  • the solar reflective mirror of the present invention is a solar reflective mirror having a configuration in which a resin plate protective layer, a resin plate, a metal reflective layer, and a metal corrosion prevention layer are provided in order from the side on which sunlight enters.
  • the resin plate protective layer is at least one of an inorganic oxide film layer or a curable resin film layer containing an ultraviolet absorber.
  • FIG. 1 is a schematic cross-sectional view showing an example of a typical layer configuration of a solar reflective mirror of the present invention.
  • FIG. 1 shows an example of a preferred configuration of the solar light reflecting mirror of the present invention. That is, the solar reflective mirror 1 of the present invention includes a resin plate protective layer 2, a resin plate 3, an anchor layer 4, a metal reflective layer 5, and a metal corrosion prevention layer 6 in order from the side on which sunlight enters. This is a mirror for reflecting sunlight.
  • the anchor layer is not essential, but an embodiment including the anchor layer is preferable.
  • the material of the resin plate is preferably a plate containing any of polyester, polyethylene terephthalate, polyethylene naphthalate, acrylic, polycarbonate, polyolefin (particularly, cycloolefin resin), cellulose, and polyamide in terms of weight reduction.
  • a plate containing any of polyester, polyethylene terephthalate, polyethylene naphthalate, acrylic, polycarbonate, polyolefin (particularly, cycloolefin resin), cellulose, and polyamide in terms of weight reduction are particularly, excellent in weather resistance, and in particular, an acrylic copolymer obtained by copolymerizing at least two or more acrylic monomers, or a cycloolefin resin is preferable.
  • acrylic copolymers include methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, and butyl methacrylate.
  • One or more monomers selected from monomers having no functional group in the side chain such as alkyl (meth) acrylates such as cyclohexyl methacrylate and 2-ethylhexyl methacrylate
  • alkyl (meth) acrylates such as cyclohexyl methacrylate and 2-ethylhexyl methacrylate
  • a monomer having a functional group such as OH or COOH in the side chain hereinafter referred to as a functional monomer
  • a solution polymerization method a suspension polymerization method, an emulsion polymerization method, a bulk polymerization method
  • a non-functional monomer that gives a polymer having a relatively low Tg such as methacrylate
  • 10 to 50% by mass of a non-functional monomer that gives a polymer having a relatively high Tg such as methyl methacrylate, isobutyl methacrylate, or cyclohexyl methacrylate 2-hydroxyethyl methacrylate, acrylic acid, itaconic acid, etc.
  • Acrylic polymers such as the ability monomer contains 0 to 10% by weight is most preferred.
  • the cycloolefin resin that can be suitably used for the resin plate according to the present invention is a polymer resin containing an alicyclic structure.
  • a preferred cycloolefin resin is a resin obtained by polymerizing or copolymerizing a cyclic olefin.
  • cyclic olefin examples include norbornene, dicyclopentadiene, tetracyclododecene, ethyltetracyclododecene, ethylidenetetracyclododecene, tetracyclo [7.4.0.110, 13.02,7] trideca-2,4, Polycyclic unsaturated hydrocarbons such as 6,11-tetraene and derivatives thereof; cyclobutene, cyclopentene, cyclohexene, 3,4-dimethylcyclopentene, 3-methylcyclohexene, 2- (2-methylbutyl) -1-cyclohexene, cyclo Examples thereof include monocyclic unsaturated hydrocarbons such as octene, 3a, 5,6,7a-tetrahydro-4,7-methano-1H-indene, cycloheptene, cyclopentadiene, cyclohexadiene,
  • Preferred cycloolefin resins may be those obtained by addition copolymerization of monomers other than cyclic olefins.
  • addition copolymerizable monomers include ethylene, ⁇ -olefins such as ethylene, propylene, 1-butene and 1-pentene; 1,4-hexadiene, 4-methyl-1,4-hexadiene, 5-methyl- And dienes such as 1,4-hexadiene and 1,7-octadiene.
  • cycloolefin resins include the following norbornene resins.
  • the norbornene-based resin preferably has a norbornene skeleton as a repeating unit. Specific examples thereof include, for example, JP-A Nos. 2003-139950, 2003-14901, and 2003-161832.
  • ZEONEX ZEONOR manufactured by Nippon Zeon Co., Ltd., Arton manufactured by JSR Corporation
  • APPEL manufactured by Mitsui Chemicals, Inc. APL8008T, APL6509T, APL6013T, APL5014DP, APL6015T
  • APL8008T APL6509T, APL6013T, APL5014DP, APL6015T
  • APL8008T APL6509T
  • APL6013T APL6013T
  • APL5014DP APL6015T
  • the thickness of the resin plate is preferably 0.5 to 5 mm, more preferably 1 to 3 mm.
  • the thickness is 0.5 mm or more, the generation of wrinkles or breakage during the processing of the solar reflective mirror can be prevented, and a highly uniform base material can be formed. Moreover, if it is 5 mm or less, the influence of the reflectance fall at the time of refuse adhering to the surface can be suppressed lightly, and it can reduce in weight.
  • a resin plate protective layer is formed on at least one surface of the resin plate surface.
  • the resin plate protective layer according to the present invention is intended to protect a resin plate, a layer containing a resin, and the like, and the resin plate protective layer is cured containing an inorganic oxide film layer or an ultraviolet absorber. It is at least one of the functional resin film layers.
  • the resin plate protective layer may serve both as an inorganic oxide film layer and a curable resin film layer containing an ultraviolet absorber.
  • the resin plate protective layer may have a single layer structure or a plurality of two or more layers.
  • the resin plate protective layer preferably has gas barrier properties.
  • the inorganic oxide film layer is preferably a gas barrier layer as described below.
  • the gas barrier layer according to the present invention is for preventing deterioration of humidity, particularly deterioration of various functional elements protected by the resin base material and the resin base material due to high humidity, but has a special function and application.
  • the gas barrier layer of various embodiments can be provided.
  • the water vapor permeability at 40 ° C. and 90% RH is 100 g / m 2 ⁇ day or less, preferably 50 g / m 2 ⁇ day or less, more preferably 20 g / m 2 ⁇ day or less.
  • the oxygen permeability is preferably 0.6 ml / m 2 ⁇ day or less under the conditions of a measurement temperature of 23 ° C. and a humidity of 90% RH.
  • the gas barrier layer according to the present invention is not particularly limited in its formation method, but after applying the ceramic precursor of the inorganic oxide film, the inorganic oxide film is formed by heating and / or ultraviolet irradiation of the coating film.
  • the method is preferably used.
  • the gas barrier layer examples include silicon oxide, aluminum oxide, or composite oxides starting from silicon oxide and aluminum oxide, zinc oxide, tin oxide, indium oxide, niobium oxide, chromium oxide, and the like. From the viewpoint, silicon oxide, aluminum oxide, or a composite metal oxide starting from silicon or aluminum is preferable.
  • a multilayer film in which a low refractive index film having a refractive index of 1.35 to 1.8 at a wavelength of 550 nm and a high refractive index film having a refractive index of 1.85 to 2.8 at a wavelength of 550 nm are alternately laminated. Also good.
  • Examples of the low refractive index film material include silicon oxide, aluminum oxide, silicon nitride, and aluminum nitride.
  • Examples of the high refractive index film material include niobium oxide, titanium oxide, zinc oxide, tin oxide, indium oxide, tantalum oxide, and zirconium oxide.
  • the thickness of the gas barrier layer made of a metal oxide is preferably in the range of 5 to 800 nm, more preferably in the range of 10 to 300 nm.
  • a polysilazane liquid can be mentioned as a gas barrier layer formation by coating.
  • a coating solution in which polysilazane is dispersed in a solvent as described in JP-T-2009-503157 is applied.
  • a dense gas barrier layer can be obtained in a short time.
  • a dense gas barrier film can also be obtained by adding a catalyst and heat-curing.
  • the ratio of polysilazane in the solvent is generally 1 to 80% by mass of polysilazane, preferably 5 to 50% by mass, particularly preferably 10 to 40% by mass.
  • water and a reactive group for example, a hydroxyl group or an amine group
  • an organic system that is inert to polysilazane and preferably an aprotic solvent is particularly suitable.
  • the additional component of the polysilazane solution is a binder such as those commonly used in the production of paints.
  • a binder such as those commonly used in the production of paints.
  • cellulose ethers and cellulose esters such as ethyl cellulose, nitrocellulose, cellulose acetate or cellulose acetobutyrate, natural resins such as rubber or rosin resins, or synthetic resins such as polymerized resins or condensed resins such as aminoplasts, in particular Urea resins and melamine formaldehyde resins, alkyd resins, acrylic resins, polyesters or modified polyesters, epoxides, polyisocyanates or blocked polyisocyanates, or polysiloxanes.
  • Still other components of the polysilazane formulation include, for example, additives that affect the formulation viscosity, substrate wetting, film formability, lubrication or exhaust properties, or inorganic nanoparticles such as SiO 2 , TiO 2 , It can be ZnO, ZrO 2 or Al 2 O 3 .
  • a gas barrier layer is produced with a resin plate, and thus a silicon oxide layer or an aluminum oxide layer obtained in this way, or a composite oxide layer using silicon oxide and aluminum oxide as a starting material is oxygen, carbon dioxide. Excellent barrier action against carbon or air gas or water vapor.
  • the average value of light transmittance of the resin plate on which the gas barrier layer is formed is preferably 90% or more. Thereby, there is no light loss and sunlight can be reflected efficiently.
  • the resin plate protective layer is an inorganic oxide film layer or a curable resin film layer containing an ultraviolet absorber.
  • the curable resin film layer is a layer containing a resin that is cured by heat, ultraviolet rays, or the like.
  • the resin plate protective layer according to the present invention preferably contains an ultraviolet absorber from the viewpoint of improving weather resistance and light resistance.
  • the ultraviolet absorber used in the protective layer for the resin plate according to the present invention is excellent in the ability to absorb ultraviolet rays having a wavelength of 370 nm or less and has little absorption of visible light having a wavelength of 400 nm or more from the viewpoint of using sunlight. Is preferred.
  • Examples of the ultraviolet absorber used in the present invention include oxybenzophenone compounds, benzotriazole compounds, salicylic acid ester compounds, benzophenone compounds, cyanoacrylate compounds, nickel complex compounds, triazine compounds, and the like. However, benzophenone compounds, less colored benzotriazole compounds, and triazine compounds are preferable. Further, ultraviolet absorbers described in JP-A Nos. 10-182621 and 8-337574, and polymer ultraviolet absorbers described in JP-A Nos. 6-148430 and 2003-113317 may be used.
  • benzotriazole ultraviolet absorbers include 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) benzo Triazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) -5 Chlorobenzotriazole, 2- (2′-hydroxy-3 ′-(3 ′′, 4 ′′, 5 ′′, 6 ′′ -tetrahydrophthalimidomethyl) -5′-methylphenyl) benzotriazole, 2,2-methylenebis (4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol), 2- (2'-hydroxy 3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-
  • TINUVIN 171, TINUVIN 900, TINUVIN 928, TINUVIN 360 (all manufactured by BASF Japan), LA31 (manufactured by ADEKA), RUVA-100 (Otsuka) Chemical).
  • benzophenone compounds include 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone, bis (2-methoxy-4-hydroxy-) 5-benzoylphenylmethane) and the like, but are not limited thereto.
  • the curable resin film layer as the resin plate protective layer contains a thermosetting resin or an ultraviolet curable resin.
  • thermosetting resin various epoxy resins, acrylate resins such as epoxy group-containing (meth) acrylates and urethane-modified (meth) acrylates can be used.
  • the epoxy resin include bisphenol A (BPA) type epoxy resin, bisphenol F (BPF) epoxy resin, and novolac type epoxy resin.
  • BPA bisphenol A
  • BPF bisphenol F
  • novolac type epoxy resin bisphenol A (BPA) type epoxy resins and bisphenol F (BPF) epoxy resins are suitable.
  • UV curable resins include methyl acrylate, ethyl acrylate, isopropyl acrylate, isobutyl acrylate, epoxy acrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, trimethylol propane triacrylate, dimethylol tricyclodecane diacrylate, tetramethylene glycol tetraacrylate 2-hydroxy-1,3-diaacryloxypropane, 2,2-bis [4- (acryloxymethoxy) phenyl] propane, 2,2-bis [4- (acryloxyethoxy) phenyl] propane, dicyclo
  • acrylate resins such as pentenyl acrylate, tricyclodecanyl acrylate, tris (acryloxyethyl) isocyanurate, and the above-mentioned thermosetting resins
  • epoxy group-containing (meth) acrylate, acrylate resins such as urethane-modified (meth) acrylate. Moreover, these may be used
  • a photopolymerization initiator When using an ultraviolet curable resin, it is necessary to add a photopolymerization initiator.
  • examples include benzoin ethers such as benzoin ethyl ether and isopropyl benzoin ether; benzyl ketals such as benzylhydroxycyclohexyl phenyl ketone; ketones such as benzophenone and acetophenone and derivatives thereof; thioxanthones; bisimidazoles and the like. These may be used alone or in combination of two or more.
  • sensitizers such as amines, a sulfur compound, a phosphorus compound, to these photoinitiators in arbitrary ratios as needed.
  • the resin plate protective layer according to the present invention preferably contains an antioxidant or a stabilizer.
  • the antioxidant that can be preferably applied to the resin plate protective layer according to the present invention include a phenol-based antioxidant, a thiol-based antioxidant, and a phosphite-based antioxidant.
  • phenolic antioxidants examples include 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 2,2′-methylenebis (4-ethyl-6-t- Butylphenol), tetrakis- [methylene-3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate] methane, 2,6-di-t-butyl-p-cresol, 4,4 '-Thiobis (3-methyl-6-t-butylphenol), 4,4'-butylidenebis (3-methyl-6-t-butylphenol), 1,3,5-tris (3', 5'-di-t -Butyl-4'-hydroxybenzyl) -S-triazine-2,4,6- (1H, 3H, 5H) trione, stearyl- ⁇ - (3,5-di-t-butyl-4-hydroxyphenyl) propi , Triethylene glycol bis [3- (3-
  • thiol-based antioxidant examples include distearyl-3,3′-thiodipropionate, pentaerythritol-tetrakis- ( ⁇ -lauryl-thiopropionate), and the like.
  • phosphite antioxidant examples include tris (2,4-di-t-butylphenyl) phosphite, distearyl pentaerythritol diphosphite, di (2,6-di-t-butylphenyl) pentaerythritol.
  • Diphosphite bis- (2,6-di-t-butyl-4-methylphenyl) -pentaerythritol diphosphite, tetrakis (2,4-di-t-butylphenyl) 4,4'-biphenylene-diphosphonite 2,2'-methylenebis (4,6-di-t-butylphenyl) octyl phosphite and the like.
  • the following light stabilizer can be used together with the antioxidant.
  • hindered amine light stabilizers include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, Bis (1,2,2,6,6-pentamethyl-4-piperidyl) -2- (3,5-di-t-butyl-4-hydroxybenzyl) -2-n-butylmalonate, 1-methyl- 8- (1,2,2,6,6-pentamethyl-4-piperidyl) -sebacate, 1- [2- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] ethyl ] -4- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] -2,2,6,6-tetramethylpiperidine, 4-benzoyloxy-2,2,6, 6-Tetrame Lupiperidine, tetrakis (2,2,2,
  • nickel-based UV stabilizers include [2,2'-thiobis (4-t-octylphenolate)]-2-ethylhexylamine nickel (II), nickel complex-3,5-di-t-butyl-4- Hydroxybenzyl phosphate monoethylate, nickel dibutyl dithiocarbamate, etc. can also be used.
  • a hindered amine light stabilizer containing only a tertiary amine is preferable.
  • bis (1,2,2,6,6-pentamethyl-4-piperidyl) is preferable.
  • a condensate of 1,2,2,6,6-pentamethyl-4-piperidinol / tridecyl alcohol and 1,2,3,4-butanetetracarboxylic acid is preferred.
  • anchor layer In the solar reflective mirror of the present invention, it is preferable to provide an anchor layer between the resin plate and the metal reflective layer from the viewpoint of improving the adhesion between the resin plate and the metal reflective layer.
  • the resin used for the anchor layer according to the present invention is not particularly limited as long as it satisfies the conditions of heat resistance and smoothness in addition to the above-mentioned adhesion, and polyester resin, acrylic resin, melamine resin, epoxy Resin, polyamide resin, vinyl chloride resin, vinyl chloride vinyl acetate copolymer resin or the like, or a mixed resin thereof can be used, and from the point of weather resistance, a polyester resin and a melamine resin mixed resin are preferable. Furthermore, it is more preferable to use a thermosetting resin mixed with a curing agent such as isocyanate.
  • the thickness of the anchor layer is preferably 0.01 to 3 ⁇ m, more preferably 0.1 to 1 ⁇ m, from the viewpoints of adhesion, smoothness, reflectance of the metal reflection layer, and the like.
  • wet coating methods such as a gravure coating method, a reverse coating method, and a die coating method can be used.
  • Metal reflective layer As the metal reflection layer, for example, silver or a silver alloy, gold, copper, aluminum, or an alloy thereof can be used. In particular, it is preferable to use silver.
  • a metal reflective layer serves as a reflective film that reflects light.
  • the visible light region means a wavelength region of 400 to 700 nm.
  • the incident angle means an angle with respect to a line perpendicular to the film surface.
  • the silver alloy is composed of silver and one or more other metals selected from the group consisting of gold, palladium, tin, gallium, indium, copper, titanium, and bismuth from the viewpoint of improving the durability of the metal reflective layer. Alloys are preferred.
  • gold is particularly preferable from the viewpoint of high temperature humidity resistance and reflectance.
  • the metal reflective layer is a film made of a silver alloy
  • the silver is preferably 90 to 99.8 atomic% in the total (100 atomic%) of silver and other metals in the metal reflective layer.
  • the other metal is preferably 0.2 to 10 atomic% from the viewpoint of durability.
  • the thickness of the metal reflective layer is preferably 60 to 300 nm, particularly preferably 80 to 200 nm. If the thickness of the metal reflective layer is less than 60 nm, the layer thickness is thin and light is transmitted, which may reduce the reflectance in the visible light region of the mirror. If the thickness of the metal reflective layer exceeds 300 nm, irregularities are likely to occur on the surface of the metal reflective layer, which causes light scattering, which may reduce the reflectance in the visible light region.
  • the metal reflective layer made of metal can be formed by either a wet method or a dry method. It is preferable to form by wet coating silver and plating, and dry by vapor deposition.
  • the metal reflective layer is preferably formed by coating and baking a coating solution containing a silver complex compound.
  • a resin plate with a resin plate protective layer is disposed on the sunlight incident side, and a coating solution containing a silver complex compound is applied thereon by a wet coating method.
  • a coating solution containing a silver complex compound is applied thereon by a wet coating method.
  • the metal reflective layer according to the present invention is not particularly limited as long as it is formed using a coating solution containing a silver complex compound.
  • Examples of the silver complex compound to be used are shown in JP-T-2009-535661.
  • a silver complex compound obtained by reacting a silver compound represented by the following general formula (1) and at least one selected from compounds represented by the following general formulas (2) to (4) is used: It is preferable.
  • X represents oxygen, sulfur, halogen, cyano, cyanate, carbonate, nitrate, nitrite, sulfate, phosphate, thiocyanate, chlorate, perchlorate, tetrafluoroborate, acetylacetonate
  • a substituent selected from carboxylate and derivatives thereof n is an integer of 1 to 4, and R 1 to R 6 are independently of each other hydrogen, C1 to C30 aliphatic or aliphatic
  • Specific examples of the general formula (1) include, for example, silver oxide, silver thiocyanate, silver sulfide, silver chloride, silver cyanide, silver cyanate, silver carbonate, silver nitrate, silver nitrite, silver sulfate, silver phosphate, perchlorine.
  • Examples include, but are not limited to, acid silver, silver tetrafluoroborate, silver acetylacetonate, silver acetate, silver lactate, silver oxalate and derivatives thereof.
  • R 1 to R 6 are specifically, for example, hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, amyl, hexyl, ethylhexyl, heptyl, octyl, isooctyl , Nonyl, decyl, dodecyl, hexadecyl, octadecyl, docodecyl, cyclopropyl, cyclopentyl, cyclohexyl, aryl, hydroxy, methoxy, hydroxyethyl, methoxyethyl, 2-hydroxypropyl, methoxypropyl, cyanoethyl, ethoxy, butoxy, hexyloxy, methoxy Ethoxyethyl, methoxyethoxyethoxyethyl, hexamethyleneimine, morpholine
  • Examples of compounds of the general formulas (2) to (4) include, for example, ammonium carbamate, ammonium carbonate, ammonium bicarbonate, ethylammonium ethylcarbamate, isopropylammonium isopropylcarbamate, n- Butyl ammonium n-butyl carbamate, isobutyl ammonium isobutyl carbamate, t-butyl ammonium t-butyl carbamate, 2-ethylhexyl ammonium 2-ethylhexyl carbamate, octadecyl ammonium octadecyl carbamate, 2-methoxyethyl ammonium 2-methoxyethyl carbamate 2-cyanoethylammonium 2-cyanoethylcarbamate, dibutylammonium dibutylcarbamate, dioctadecylammonium dioctadecy
  • ammonium carbamate or ammonium carbonate compound are not particularly limited.
  • US Pat. No. 4,542,214 describes that ammonium carbamate compounds can be prepared from carbon dioxide and primary amines, secondary amines, tertiary amines, or at least one of these mixtures. When 0.5 mol of water is further added per 1 mol of the amine, an ammonium carbonate compound is obtained. When 1 mol or more of water is added, an ammonium bicarbonate compound can be obtained.
  • alcohols such as water, methanol, ethanol, isopropanol, butanol, ethylene glycol, glycerin, etc.
  • Glycols ethyl acetate, butyl acetate, acetates such as carbitol acetate, ethers such as diethyl ether, tetrahydrofuran, dioxane, ketones such as methyl ethyl ketone, acetone, hydrocarbons such as hexane, heptane, Examples include aromatics such as benzene and toluene, and halogen-substituted solvents such as chloroform, methylene chloride, and carbon tetrachloride, or mixed solvents thereof. Is carbon dioxide bubbled in the gas phase?
  • the solid phase dry ice it can be reacted in supercritical (supercritical) state.
  • any known method other than the above method may be used as long as the structure of the final substance is the same. That is, it is not necessary to specifically limit the solvent, reaction temperature, concentration or catalyst for production, and the production yield is not affected.
  • An organic silver complex compound can be produced by reacting the ammonium carbamate or ammonium carbonate compound thus produced with a silver compound.
  • a silver compound for example, at least one silver compound represented by the general formula (1), at least one ammonium carbamate or ammonium carbonate derivative represented by the general formulas (2) to (4), and a mixture thereof.
  • alcohols such as water, methanol, ethanol, isopropanol, butanol, ethylene glycol, glycerin Glycols such as ethyl acetate, butyl acetate, acetates such as carbitol acetate, ethers such as diethyl ether, tetrahydrofuran and dioxane, ketones such as methyl ethyl ketone and acetone, hydrocarbons such as hexane and heptane Of benzene, toluene Aromatic UNA, and chloroform and methylene chloride, and halogen-substituted solvents or a mixed solvent such as carbon tetrachloride can be used.
  • glycerin Glycols such as ethyl acetate, butyl acetate, acetates such as carbitol acetate
  • ethers such as diethyl ether, tetrahydrofur
  • a silver complex compound can also be produced by reaction.
  • the reaction can be performed directly without using a solvent in a normal pressure or pressurized state of a nitrogen atmosphere, or can be performed using a solvent.
  • any known method may be used as long as the structure of the final material is the same. That is, it is not necessary to specifically limit the solvent for the production, the reaction temperature, the concentration, the presence or absence of the catalyst, and the production yield is not affected.
  • the silver complex compound used in the present invention has a production method described in JP-T-2008-530001, and is recognized by the structure of the following general formula (5).
  • the coating liquid for forming a silver reflection layer used for forming a highly reflective and highly glossy silver reflection layer according to the present invention contains the silver complex compound according to the present invention, and if necessary, a solvent, A stabilizer, a leveling agent, an additive for a thin film auxiliary agent, a reducing agent, and a thermal decomposition reaction accelerator can be contained in the coating solution for forming a silver reflective layer according to the present invention.
  • An additive such as an auxiliary agent, a reducing agent, and a thermal decomposition reaction accelerator can be contained in the silver coating composition according to the present invention.
  • Examples of the stabilizer that can be used in the coating liquid for forming a metal reflection layer include, for example, amine compounds such as primary amine, secondary amine, and tertiary amine, ammonium carbamate, ammonium carbonate, ammonium bicarbonate compound, Or a phosphorus compound such as phosphine, phosphite, phosphate, a sulfur compound such as thiol or sulfide, and at least one of these mixtures, and an amine.
  • amine compounds such as primary amine, secondary amine, and tertiary amine
  • ammonium carbamate ammonium carbonate
  • ammonium bicarbonate compound or a phosphorus compound such as phosphine, phosphite, phosphate, a sulfur compound such as thiol or sulfide, and at least one of these mixtures, and an amine.
  • a phosphorus compound such as phosphine, phosphite, phosphate
  • the compound examples include methylamine, ethylamine, n-propylamine, isopropylamine, n-butylamine, isobutylamine, isoamylamine, n-hexylamine and 2-ethylhexyl.
  • ammonium carbamate, carbonate, and bicarbonate compounds include ammonium carbamate, ammonium carbonate, ammonium bicarbonate, ethylammonium ethylcarbamate, isopropylammonium isopropylcarbamate, and n-butyl.
  • R 3 P include a phosphorus compound represented by (RO) 3 P or (RO) 3 PO.
  • R represents an alkyl or aryl group having 1 to 20 carbon atoms, and specific examples thereof include tributylphosphine, triphenylphosphine, triethyl phosphite, triphenyl phosphite, dibenzyl phosphate, triethyl phosphate and the like.
  • sulfur compound examples include butanethiol, n-hexanethiol, diethyl sulfide, tetrahydrothiophene, aryl disulfide, 2-mercaptobenzoazole, tetrahydrothiophene, octylthioglycolate, and the like.
  • the amount of such a stabilizer used is not particularly limited. However, the content is preferably 0.1% to 90% in terms of molar ratio with respect to the silver compound.
  • examples of the thin film auxiliary that can be used in the coating liquid for forming a metal reflection layer include organic acids and organic acid derivatives, or at least one or a mixture thereof. Specifically, for example, acetic acid, butyric acid (valeric acid), valeric acid (pivalic acid), hexanoic acid, octanoic acid, 2-ethyl-hexanoic acid, neodecanoic acid, lauric acid ( Lauric acid), stearic acid, naphthalic acid, and the like.
  • organic acid derivatives include ammonium acetate, ammonium citrate, ammonium laurate, ammonium lactate, and ammonium maleate.
  • Organic acid ammonium salts such as ammonium oxalate and ammonium molybdate, Au, Cu, Zn, Ni, Co, Pd, Pt, Ti, V, Mn, Fe, Cr, Zr, Nb, Mo, W, Ru, Cd, Ta, Re, O
  • organic acid metal salts such as silver octanoate, silver neodecanoate, cobalt stearate, nickel naphthalate and cobalt naphthalate.
  • the amount of the thin film auxiliary used is not particularly limited, but is preferably 0.1 to 25% in terms of molar ratio with respect to the silver complex compound.
  • Examples of the reducing agent that can be used in the coating liquid for forming the metal reflection layer include Lewis acid or weak Bronsted acid, and specific examples thereof include hydrazine, hydrazine monohydrate, acetohydrazide, and boron hydroxide.
  • Amine compounds such as sodium or potassium borohydride, dimethylamine borane and butylamine borane, metal salts such as ferrous chloride and iron lactate, hydrogen, hydrogen iodide, carbon monoxide, formaldehyde, acetaldehyde, glyoxal
  • aldehyde compounds formic acid compounds such as methyl formate, butyl formate and triethyl-o-formic acid, and mixtures thereof containing at least one reducing organic compound such as glucose, ascorbic acid and hydroquinone.
  • Hydroxyalkylamines piperidine, N-methylpiperidine, piperazine, N, N'-dimethylpiperazine, 1-amino-4methylpiperazine, pyrrolidine, N-methylpyrrolidine, amine compounds such as morpholine, acetone oxime, dimethylglyoxime Alkyl oximes such as 2-butanone oxime and 2,3-butadione monooxime, glycols such as ethylene glycol, diethylene glycol and triethylene glycol, methoxyethyl alcohol Of alkoxyalkylamines such as ethylene, ethoxyethylamine and methoxypropylamine, alkoxyalkanols such as methoxyethanol, methoxypropanol and ethoxyethanol, ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone, acetol and diacetone alcohol Examples thereof include ketone alcohols, polyhydric phenol compounds, phenol resin
  • a solvent is necessary for adjusting the viscosity of the coating liquid for forming the metal reflection layer and for forming a smooth thin film.
  • the solvent that can be used in this case include water, methanol, ethanol, isopropanol, 1-methoxypropanol, Alcohols such as butanol, ethylhexyl alcohol and terpineol, glycols such as ethylene glycol and glycerin, ethyl acetate, butyl acetate, methoxypropyl acetate, carbitol acetate, acetates such as ethyl carbitol acetate, methyl cellosolve, butyl cellosolve , Ethers such as diethyl ether, tetrahydrofuran, dioxane, methyl ethyl ketone, acetone, dimethylformamide, ketones such as 1-methyl-2-pyrrolidone, hexane, Hydro
  • a coating method applied to form a metal reflective layer by applying a metal reflective layer coating solution containing the silver complex compound according to the present invention on a resin plate is particularly a wet coating method.
  • a coating method There are no restrictions, for example, spin coating, dip coating, extrusion coating, roll coating coating, spray coating, gravure coating, wire bar coating, air knife coating, slide popper coating, curtain coating, screen printing method, inkjet printing method, etc.
  • a coating method using a known solution can be appropriately selected and used.
  • firing treatment is performed to form a reflecting mirror surface.
  • the calcination treatment can also be performed by heat treatment in a normal inert atmosphere, but if necessary, in air, nitrogen, carbon monoxide, or between hydrogen gas and air or other inert gas. Treatment with a mixed gas is also possible.
  • the heat treatment is usually in the range of 80 to 200 ° C., preferably 90 to 170 ° C., more preferably 100 to 150 ° C., although it depends on the constituent material of the resin plate to be applied.
  • a method of performing heat treatment in two or more stages of low temperature and high temperature within the above temperature range is preferable from the viewpoint of the uniformity of the reflective film.
  • the treatment can be performed at 80 to 150 ° C. for 1 to 30 minutes and then at 150 to 200 ° C. for 1 to 30 minutes.
  • the solar reflective mirror of the present invention is characterized by having a metal corrosion prevention layer on the surface of the metal reflective layer.
  • the metal corrosion prevention layer contains a corrosion inhibitor and prevents corrosion deterioration of the metal forming the metal reflection layer, for example, silver.
  • a polyester resin As a resin that can be used for forming the metal corrosion prevention layer, a polyester resin, an acrylic resin, a melamine resin, an epoxy resin, etc. can be used alone or a mixed resin thereof. From the viewpoint of weather resistance, a polyester resin An acrylic resin is preferable, and a thermosetting resin mixed with a curing agent such as isocyanate is more preferable.
  • isocyanate various conventionally used isocyanates such as TDI (tolylene diisocyanate), XDI (xylene diisocyanate), MDI (methylene diisocyanate), and HMDI (hexamethylene diisocyanate) can be used. From the viewpoint of properties, XDI, MDI, and HMDI isocyanates are preferably used.
  • the thickness of the metal corrosion prevention layer is preferably from 0.01 to 3 ⁇ m, more preferably from 0.1 to 1 ⁇ m, from the viewpoints of adhesion, weather resistance and the like.
  • a conventionally known coating method such as a gravure coating method, a reverse coating method, or a die coating method can be used.
  • a corrosion inhibitor and an antioxidant having an adsorptive group for silver are preferably used.
  • the term “corrosion” refers to a phenomenon in which metal (silver) is chemically or electrochemically eroded or deteriorated by the environmental material surrounding it (see JIS Z0103-2004).
  • the undercoat layer contains an antioxidant and the metal corrosion prevention layer contains a corrosion inhibitor having an adsorptive group for silver is also preferable.
  • the optimum amount of the corrosion inhibitor varies depending on the compound to be used, but generally it is preferably in the range of 0.1 to 1.0 g / m 2 .
  • Corrosion inhibitors having an adsorptive group for silver applicable to the present invention include amines and derivatives thereof, compounds having a pyrrole ring, compounds having a triazole ring, compounds having a pyrazole ring, compounds having a thiazole ring, imidazole It is desirable to be selected from a compound having a ring, a compound having an indazole ring, a copper chelate compound, a thiourea, a compound having a mercapto group, a naphthalene-based compound, or a mixture thereof.
  • amines and derivatives thereof include ethylamine, laurylamine, tri-n-butylamine, o-toluidine, diphenylamine, ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, monoethanolamine, diethanolamine, triethanolamine, 2-N-dimethylethanolamine, 2-amino-2-methyl-1,3-propanediol, acetamide, acrylamide, benzamide, p-ethoxychrysidine, dicyclohexylammonium nitrite, dicyclohexylammonium salicylate, monoethanolamine benzoate, dicyclohexyl Ammonium benzoate, diisopropylammonium benzoate, diisopropylammonium Toraito, cyclohexylamine carbamate, nitronaphthalene nitrite, cyclohexylamine benzoate, dicyclohexyl
  • Examples of the compound having a pyrrole ring include N-butyl-2,5-dimethylpyrrole, N-phenyl-2,5-dimethylpyrrole, N-phenyl-3-formyl-2,5-dimethylpyrrole, and N-phenyl. -3,4-diformyl-2,5-dimethylpyrrole, etc., or a mixture thereof.
  • Examples of the compound having a triazole ring include 1,2,3-triazole, 1,2,4-triazole, 3-mercapto-1,2,4-triazole, 3-hydroxy-1,2,4-triazole, 3-methyl-1,2,4-triazole, 1-methyl-1,2,4-triazole, 1-methyl-3-mercapto-1,2,4-triazole, 4-methyl-1,2,3- Triazole, benzotriazole, tolyltriazole, 1-hydroxybenzotriazole, 4,5,6,7-tetrahydrotriazole, 3-amino-1,2,4-triazole, 3-amino-5-methyl-1,2, 4-triazole, carboxybenzotriazole, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2'- Droxy-5'-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy
  • Examples of the compound having a pyrazole ring include pyrazole, pyrazoline, pyrazolone, pyrazolidine, pyrazolidone, 3,5-dimethylpyrazole, 3-methyl-5-hydroxypyrazole, 4-aminopyrazole, and a mixture thereof.
  • Examples of the compound having a thiazole ring include thiazole, thiazoline, thiazolone, thiazolidine, thiazolidone, isothiazole, benzothiazole, 2-N, N-diethylthiobenzothiazole, P-dimethylaminobenzallodanine, 2-mercaptobenzo Examples include thiazole and the like, or a mixture thereof.
  • Examples of the compound having an imidazole ring include imidazole, histidine, 2-heptadecylimidazole, 2-methylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, and 1-benzyl-2.
  • Examples of the compound having an indazole ring include 4-chloroindazole, 4-nitroindazole, 5-nitroindazole, 4-chloro-5-nitroindazole, and a mixture thereof.
  • copper chelate compounds include acetylacetone copper, ethylenediamine copper, phthalocyanine copper, ethylenediaminetetraacetate copper, hydroxyquinoline copper, and mixtures thereof.
  • thioureas examples include thiourea, guanylthiourea, and the like, or a mixture thereof.
  • mercaptoacetic acid thiophenol, 1,2-ethanediol, 3-mercapto-1,2,4-triazole, 1-methyl-3-mercapto
  • naphthalene-based compounds examples include thionalide.
  • an antioxidant and a stabilizer can also be used.
  • examples of the antioxidant and stabilizer include the same antioxidants and stabilizers that can be applied to the polymers described above.
  • the following functional layers may be formed as necessary.
  • a scratch-resistant easy-sliding layer can be provided as the outermost layer of the mirror. This scratch-resistant easy-slip layer is provided for preventing scratches.
  • the scratch-resistant easy-slip layer can be composed of an acrylic resin, a urethane resin, a melamine resin, an epoxy resin, an organic silicate compound, a silicone resin, or the like.
  • silicone resins and acrylic resins are preferable in terms of hardness and durability.
  • what consists of an active energy ray-curable acrylic resin or a thermosetting acrylic resin is preferable at the point of sclerosis
  • the active energy ray-curable acrylic resin or thermosetting acrylic resin is a composition containing a polyfunctional acrylate, an acrylic oligomer or a reactive diluent as a polymerization curing component.
  • Acrylic oligomers include polyester acrylates, urethane acrylates, epoxy acrylates, polyether acrylates, etc., including those in which a reactive acrylic group is bonded to an acrylic resin skeleton, and rigid materials such as melamine and isocyanuric acid. A structure in which an acrylic group is bonded to a simple skeleton can also be used.
  • the reactive diluent has a function of a solvent in the coating process as a medium of the coating agent, and has a group that itself reacts with a monofunctional or polyfunctional acrylic oligomer. It becomes a copolymerization component.
  • Multifunctional acrylic paints include Mitsubishi Rayon Co., Ltd. (trade name “Diabeam” series, etc.), Nagase Sangyo Co., Ltd. (trade name “Denacol” series, etc.), Shin-Nakamura Co., Ltd. ( (Product name “NK Ester” series, etc.), DIC Corporation; (Product name “UNIDIC” series, etc.), Toagosei Co., Ltd. (Product name “Aronix” series, etc.), Nippon Oil and Fats Corporation; (Such as “series”), Nippon Kayaku Co., Ltd .; (trade name “KAYARAD” series, etc.), Kyoeisha Chemical Co., Ltd. (trade names “light ester” series, “light acrylate” series, etc.) it can.
  • various additives can be further blended in the scratch-resistant easy-sliding layer as required, as long as the effects of the present invention are not impaired.
  • stabilizers such as antioxidants, light stabilizers, ultraviolet absorbers, surfactants, leveling agents, antistatic agents, and the like can be used.
  • the leveling agent is particularly effective for reducing surface irregularities when a scratch-resistant easy-slip layer is applied.
  • a dimethylpolysiloxane-polyoxyalkylene copolymer for example, SH190 manufactured by Toray Dow Corning Co., Ltd.
  • SH190 manufactured by Toray Dow Corning Co., Ltd. is suitable as the silicone leveling agent.
  • a sacrificial anticorrosive layer can be provided on the solar reflective mirror of the present invention.
  • the sacrificial anticorrosive layer as used in the present invention is a layer that protects the metal reflective layer made of metal by sacrificial anticorrosion, and the metal reflective layer made of metal is disposed by arranging the sacrificial anticorrosive layer on the back surface of the metal reflective layer.
  • the corrosion resistance of the layer can be improved.
  • the sacrificial anticorrosive layer is preferably copper having a higher ionization tendency than silver, and the sacrificial anticorrosive layer made of copper suppresses silver deterioration by being provided under the metal reflective layer composed of silver. Can do.
  • the solar power generation reflecting device of the present invention is formed by fixing a solar reflective mirror to a holding member, for example, a metal member such as an aluminum frame.
  • a metal frame as the holding member, for example, a steel plate, a copper plate, an aluminum plate, an aluminum plated steel plate, an aluminum alloy plated steel plate, a copper plated steel plate, a tin plated steel plate, chromium.
  • a metal material having a high thermal conductivity such as a plated steel plate or a stainless steel plate can be used.
  • the solar power generation reflecting device of the present invention can be applied as a solar power generation mirror for collecting sunlight.
  • the reflecting device is shaped like a bowl (semi-cylindrical), and a cylindrical member having fluid inside is provided at the center of the semicircle, and sunlight is condensed on the cylindrical member.
  • the form which heats an internal fluid by this, converts the heat energy, and generates electric power is mentioned as one form.
  • flat reflectors were installed at multiple locations, and the sunlight reflected by each reflector was collected on one reflector (central reflector) and reflected by the reflector.
  • produces electricity by converting a thermal energy in a power generation part is also mentioned as one form.
  • the reflection device for solar power generation of the present invention is particularly preferably used.
  • Example 1 ⁇ Production of mirrors for sunlight reflection> (Preparation of mirror 1) A glass plate (thickness 3 mm) was used as a substrate for forming the reflective surface. After the surface of the glass plate was washed to remove oils and fats, a silver reflection layer was formed by a spray-type silver mirror reaction. An ethyl acetate solution of methyl acrylate: butyl acrylate copolymer (ratio 64:36, thermosetting resin) containing a benzotriazole-based corrosion inhibitor was coated on the silver reflective layer by gravure coating, and at 80 ° C. for 4 minutes. It dried and produced the mirror 1 of the comparative example.
  • Acrylic pressure-sensitive adhesive Sdyne # 7851 (manufactured by Sekisui Chemical Co., Ltd.) is applied as an adhesive to a thickness of 10 ⁇ m to form an adhesive layer, and then an acrylic film 75 ⁇ m (Mitsubishi Rayon HBA006) containing an ultraviolet absorber is nip-rolled to the adhesive layer
  • a film mirror was produced by pasting under conditions of a temperature of 80 ° C. and a nip roll pressure of 2 MPa. Since the shape cannot be maintained only with the thin mirror 2, the mirror 2 of the comparative example was fabricated by separately attaching to a 3 mm aluminum plate.
  • a transparent acrylic resin substrate (methacrylic resin PMMA) of 1 m square and 3 mm was prepared.
  • the substrate was pulled up at a speed of 7 cm per minute using a pulling device using a synchronous motor in order to make the coated surface uniform.
  • the pulled acrylic resin substrate was heat-treated at 60 ° C. for 1 hour in a constant temperature dryer, and the acrylic resin substrate was coated on the acrylic resin substrate.
  • a solution An ammonia-excess ammoniacal silver nitrate aqueous solution containing 34 g / L of AgNO 3 was prepared (hereinafter referred to as “A solution”).
  • B solution An aqueous solution of sodium hydroxide and a NaOH solution of 20 g / L was prepared (hereinafter referred to as “B solution”).
  • C solution A solution of glucose aqueous solution of C 6 H 12 O 6 15 g / L was prepared (hereinafter referred to as “C solution”).
  • Liquid A, liquid B and liquid C are brought to room temperature of 15 ° C or higher, and are mixed at a ratio of 1: 1: 1 to obtain a mixed liquid.
  • the mixed solution (silver plating solution) immediately after the mixing is placed on the upper surface of the acrylic resin substrate coated with the above-mentioned acrylic-modified silicone and left to stand.
  • the mixed solution (silver plating solution) spreads uniformly without being repelled on the top surface of the acrylic resin substrate by the action of the acrylic-modified silicone layer, and a uniform silver mirror (silver thin film layer) can be formed on the surface of the acrylic resin substrate by a silver mirror reaction.
  • a copper protective film is formed on it with a copper sulfate (II) aqueous solution and a reducing agent solution (zinc powder suspension), and then a backing coating is applied. Then, the mirror 4 of the comparative example was produced.
  • II copper sulfate
  • a reducing agent solution zinc powder suspension
  • a gas barrier property measuring apparatus As a gas barrier property measuring apparatus, a water vapor permeability measuring apparatus PERMATRAN-W3-33 manufactured by MOCON was used. The oxygen permeability was measured with an oxygen permeability measuring device OXTRAN-2-21 manufactured by MOCON. In order to match the thickness with the measuring device, the thickness of the material constituting the layer disposed on the surface layer on the sunlight side of the mirror 1 to the mirror 7 was unified to 0.5 mm. When the water vapor permeability and the oxygen permeability were measured, the results shown in Table 2 were obtained.
  • the mirror thus produced was allowed to stand for 30 days in an environment of a temperature of 85 ° C. and a relative humidity of 85%, and then irradiated with a xenon lamp (with a suga tester SX75, radiation intensity of 180 W / m 2 500 hours). Subsequently, the regular reflectance of 5 degrees was measured by the same method as described above after irradiation with the xenon lamp. With respect to the initial spot diameter and the initial 5 degree regular reflectance, the smaller the fluctuation range, the better the weather resistance.
  • the produced mirror was cut into a 150 mm square so as to enter the measuring apparatus. If it is placed on a Fizeau normal incidence interferometer (MSP150, manufactured by Tropel Co., Ltd.) and the height difference within the 150 mm square range is less than 10 ⁇ m, it is ⁇ if it is 10 ⁇ m or more and less than 100 ⁇ m, and ⁇ if there is a height difference of 100 ⁇ m or more. It was determined.
  • MSP150 Fizeau normal incidence interferometer
  • the mirror of the present invention has excellent specular reflectivity, light weight, flatness and excellent weather resistance with respect to the comparative example.
  • the mirror of the present invention has a gas barrier property and excellent weather resistance as compared with the comparative example.
  • Example 2 ⁇ Preparation of solar power reflectors ⁇ Each of the produced mirrors was installed as a holding member on an aluminum frame to produce a solar power generation reflection device.
  • the mirror 3 using a 0.5 mm thick steel plate was bent at a wind speed of 15 m / s. Other mirrors did not deform such as deflection.
  • the present invention is configured as described above, it can be used as a solar power generation reflecting device using a solar reflective mirror and a solar reflective mirror.

Abstract

L'invention concerne un miroir pour réfléchir la lumière solaire, qui comprend une couche de protection de plaque de résine, une plaque de résine, une couche métallique réfléchissante et une couche de prévention de corrosion métallique dans cet ordre comme observé depuis le côté d'incidence de la lumière solaire, et qui est caractérisé en ce que la couche de protection de plaque de résine consiste en une couche d'un film oxyde minéral et/ou une couche d'un film de résine solidifiable contenant un absorbeur de rayons ultraviolets.
PCT/JP2011/073985 2010-10-26 2011-10-19 Miroir pour réfléchir la lumière solaire, et dispositif de réflexion pour génération d'électricité solaire WO2012056953A1 (fr)

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JPS61154942A (ja) * 1984-12-24 1986-07-14 ミネソタ　マイニング　アンド　マニユフアクチユアリング　コンパニー 耐腐食性反射鏡
JPH10305510A (ja) * 1997-05-02 1998-11-17 Oike Ind Co Ltd 反射フィルム
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