WO2019216152A1 - 表面処理赤外線吸収微粒子分散液および赤外線吸収透明基材 - Google Patents
表面処理赤外線吸収微粒子分散液および赤外線吸収透明基材 Download PDFInfo
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- WO2019216152A1 WO2019216152A1 PCT/JP2019/016586 JP2019016586W WO2019216152A1 WO 2019216152 A1 WO2019216152 A1 WO 2019216152A1 JP 2019016586 W JP2019016586 W JP 2019016586W WO 2019216152 A1 WO2019216152 A1 WO 2019216152A1
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- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- CGGMOWIEIMVEMW-UHFFFAOYSA-N potassium tungsten Chemical compound [K].[W] CGGMOWIEIMVEMW-UHFFFAOYSA-N 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000008165 rice bran oil Substances 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- LMHHRCOWPQNFTF-UHFFFAOYSA-N s-propan-2-yl azepane-1-carbothioate Chemical compound CC(C)SC(=O)N1CCCCCC1 LMHHRCOWPQNFTF-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008159 sesame oil Substances 0.000 description 1
- 235000011803 sesame oil Nutrition 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 239000002600 sunflower oil Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
- UQMOLLPKNHFRAC-UHFFFAOYSA-N tetrabutyl silicate Chemical compound CCCCO[Si](OCCCC)(OCCCC)OCCCC UQMOLLPKNHFRAC-UHFFFAOYSA-N 0.000 description 1
- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical compound CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 description 1
- FRGPKMWIYVTFIQ-UHFFFAOYSA-N triethoxy(3-isocyanatopropyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCN=C=O FRGPKMWIYVTFIQ-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- 239000002383 tung oil Substances 0.000 description 1
- KPGXUAIFQMJJFB-UHFFFAOYSA-H tungsten hexachloride Chemical compound Cl[W](Cl)(Cl)(Cl)(Cl)Cl KPGXUAIFQMJJFB-UHFFFAOYSA-H 0.000 description 1
- CMPGARWFYBADJI-UHFFFAOYSA-L tungstic acid Chemical compound O[W](O)(=O)=O CMPGARWFYBADJI-UHFFFAOYSA-L 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- GRUMUEUJTSXQOI-UHFFFAOYSA-N vanadium dioxide Chemical compound O=[V]=O GRUMUEUJTSXQOI-UHFFFAOYSA-N 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229940098697 zinc laurate Drugs 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- GPYYEEJOMCKTPR-UHFFFAOYSA-L zinc;dodecanoate Chemical compound [Zn+2].CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O GPYYEEJOMCKTPR-UHFFFAOYSA-L 0.000 description 1
- CHJMFFKHPHCQIJ-UHFFFAOYSA-L zinc;octanoate Chemical compound [Zn+2].CCCCCCCC([O-])=O.CCCCCCCC([O-])=O CHJMFFKHPHCQIJ-UHFFFAOYSA-L 0.000 description 1
- NHXVNEDMKGDNPR-UHFFFAOYSA-N zinc;pentane-2,4-dione Chemical compound [Zn+2].CC(=O)[CH-]C(C)=O.CC(=O)[CH-]C(C)=O NHXVNEDMKGDNPR-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
-
- 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
- C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
- C03C17/30—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G41/00—Compounds of tungsten
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G41/00—Compounds of tungsten
- C01G41/02—Oxides; Hydroxides
-
- 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
- C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
- C03C17/007—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
-
- 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
- C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
- C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
-
- 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
- C03C17/06—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/02—Amorphous compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/50—Solid solutions
- C01P2002/52—Solid solutions containing elements as dopants
- C01P2002/54—Solid solutions containing elements as dopants one element only
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
-
- 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
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
-
- 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
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
- C03C2217/44—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the composition of the continuous phase
- C03C2217/45—Inorganic continuous phases
- C03C2217/452—Glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
- C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
- C03C2217/47—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase consisting of a specific material
- C03C2217/475—Inorganic materials
-
- 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
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
- C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
- C03C2217/48—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase having a specific function
-
- 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
Definitions
- the present invention relates to a surface-treated infrared-absorbing fine particle dispersion in which surface-treated infrared-absorbing fine particles, which are infrared-absorbing fine particles coated with a predetermined coating film, are dispersed in a predetermined liquid medium, and the surface-treated infrared rays
- the present invention relates to an infrared absorbing transparent base material having a coating layer in which absorbing fine particles are dispersed.
- Patent Document 1 At least one selected from the group consisting of Group IIIa, Group IVa, Group Vb, Group VIb and Group VIIb of the periodic table as a first layer from the substrate side on a transparent glass substrate.
- a composite tungsten oxide film containing metal ions is provided, a transparent dielectric film is provided as a second layer on the first layer, and a group IIIa, IVa group, Vb of the periodic table is provided as a third layer on the second layer.
- Patent Document 2 a first dielectric film is provided as a first layer from the substrate side on a transparent glass substrate in the same manner as Patent Document 1, and tungsten oxide is formed as a second layer on the first layer.
- An infrared shielding glass has been proposed in which a film is provided and a second dielectric film is provided as a third layer on the second layer.
- Patent Document 3 a composite tungsten oxide film containing the same metal element as in Patent Document 1 is provided as a first layer from the substrate side on the transparent glass substrate in the same manner as in Patent Document 1, and the first There has been proposed a heat ray blocking glass in which a transparent dielectric film is provided as a second layer on the layer.
- Patent Document 4 tungsten trioxide (WO 3 ), molybdenum trioxide (MoO 3 ), niobium pentoxide (Nb 2 O 5 ), pentoxide containing an additive element such as hydrogen, lithium, sodium, or potassium.
- tungsten trioxide WO 3
- MoO 3 molybdenum trioxide
- Nb 2 O 5 niobium pentoxide
- pentoxide containing an additive element such as hydrogen, lithium, sodium, or potassium.
- a metal oxide film selected from one or more of tantalum (Ta 2 O 5 ), vanadium pentoxide (V 2 O 5 ), and vanadium dioxide (VO 2 ) is coated by a CVD method or a spray method, 250
- a solar control glass sheet formed by being thermally decomposed at about ° C. and having solar light shielding properties.
- Patent Document 5 proposes a sunlight-modulable light insulating material using tungsten oxide obtained by hydrolyzing tungstic acid and adding an organic polymer having a specific structure called polyvinylpyrrolidone to the tungsten oxide. ing.
- sunlight is irradiated onto the sunlight-modulable light-insulating material, ultraviolet rays in the light are absorbed by tungsten oxide to generate excited electrons and holes, and the appearance amount of pentavalent tungsten is remarkably generated by a small amount of ultraviolet rays.
- Increasing the color reaction speeds up, and the color density increases accordingly.
- the pentavalent tungsten is oxidized to hexavalent very quickly and the decoloring reaction is increased.
- Patent Document 6 by dissolving tungsten hexachloride in alcohol and evaporating the medium as it is, or heating and refluxing, evaporating the medium, and then heating at 100 ° C. to 500 ° C. And obtaining tungsten oxide fine particle powder made of tungsten trioxide or a hydrate thereof or a mixture of both. And it disclosed that an electrochromic element can be obtained by using the tungsten oxide fine particles, that the optical characteristics of the film can be changed when a multilayer stack is formed and protons are introduced into the film, etc. .
- Patent Document 7 a meta-type ammonium tungstate and various water-soluble metal salts are used as raw materials, and a dried solid solution of the mixed aqueous solution is heated at a heating temperature of about 300 to 700 ° C.
- an inert gas addition amount: about 50 vol% or more
- water vapor addition amount: about 15 vol% or less
- general formula MXWO 3 where M is an alkali, alkaline earth, rare earth
- Various tungsten bronzes represented by metal elements such as 0 ⁇ x ⁇ 1) have been proposed. Then, it has been proposed to perform various operations on a support to produce various tungsten bronze-coated composites and use them as electrode catalyst materials for fuel cells and the like.
- the infrared shielding material fine particles are tungsten oxide fine particles represented by the general formula WyOz (W is tungsten, O is oxygen, 2.2 ⁇ z / y ⁇ 2.999), and / or the general formula MxWyOz.
- M is H, He, alkali metal, alkaline earth metal, rare earth element, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au. Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be Hf, Os, Bi, I, one or more elements selected from W, W is tungsten, O is oxygen, 0.001 ⁇ x / y ⁇ 1, 2.2 ⁇ z / y ⁇ 3.0)
- This is a composite tungsten oxide fine particle represented by Particle diameter of the infrared shielding material microparticle is 1nm or more 800nm or less.
- the optical member transparent substrate, film, resin sheet, etc.
- the tungsten oxide fine particles and / or composite tungsten oxide fine particles depending on the use situation and method, It has been found that water vapor and moisture gradually permeate into the coating layer and solid resin of the optical member. When water vapor or moisture penetrates into the coating layer or the solid resin, the surface of the tungsten oxide fine particles and / or composite tungsten oxide fine particles is decomposed, and the transmittance of light having a wavelength of 200 to 2600 nm with time. It has been found that there is a problem that the infrared absorption performance of the optical member gradually decreases.
- the “coating layer” is a medium film formed at a room temperature and having a predetermined thickness on a substrate.
- the “solid resin” means a polymer medium that is solid at room temperature, and includes a polymer medium other than one that is three-dimensionally crosslinked.
- a polymer medium that is solid at room temperature may be referred to as “resin”.
- the surface of the fine particles is caused by water vapor or moisture in the air. It has been found that it degrades. In particular, it has also been found that the loss ratio of the infrared absorption effect due to the degradation and degradation is larger as the tungsten oxide fine particles and the composite tungsten oxide fine particles having higher surface activity.
- Patent Document 9 tungsten oxide represented by the general formula WyOz and / or the general formula as the infrared shielding fine particles having excellent water resistance and excellent infrared shielding properties.
- An infrared shielding fine particle coated with an organometallic compound and a method for producing the same are disclosed.
- infrared absorbing materials are basically used outdoors because of their characteristics and often require high weather resistance.
- An example of outdoor use is an infrared-absorbing transparent substrate having an infrared-absorbing material-containing coating layer on at least one surface of the transparent substrate.
- further improvements in water resistance and heat and humidity resistance are required for the infrared shielding fine particles disclosed in Patent Document 9 and infrared absorbing transparent base materials using the same. Became.
- the present invention has been made under the above-described circumstances, and the problem is that surface-treated infrared-absorbing fine particles having excellent heat-and-moisture resistance and excellent infrared absorption characteristics are dispersed in a predetermined liquid medium.
- An object of the present invention is to provide an infrared-absorbing transparent base material having a surface-treated infrared absorbing fine particle dispersion and a coating layer in which the surface-treated infrared absorbing fine particles are dispersed.
- the present inventors selected the tungsten oxide fine particles or / and composite tungsten oxide fine particles having excellent optical characteristics as infrared absorbing fine particles, and the heat and moisture resistance of the infrared absorbing fine particles and A study was made on a configuration that could improve chemical stability.
- the compound that has excellent affinity with the surface of the infrared-absorbing fine particles is uniformly adsorbed on the surface of the fine particles, and forms a strong coating film on the fine particle surface
- the individual The present inventors have come up with a configuration that covers the surface of the infrared absorbing fine particles.
- the present inventors continued further research and came up with metal chelate compounds and metal cyclic oligomer compounds as compounds that have excellent affinity for the above-described infrared absorbing fine particles and that form a strong coating film on the surface of the fine particles.
- the hydrolysis products of these compounds or the polymerization products of these hydrolysis products produced when the metal chelate compound or metal cyclic oligomer compound is hydrolyzed are individually absorbed by infrared rays. It was conceived that it is a compound that uniformly adsorbs to the surface of the fine particles and forms a strong coating film.
- the surface of the tungsten oxide fine particles or / and the composite tungsten oxide fine particles is a hydrolysis product of a metal chelate compound, a polymer of a hydrolysis product of a metal chelate compound, a hydrolysis product of a metal cyclic oligomer compound, a metal Infrared absorbing fine particles coated with a coating film containing at least one selected from the hydrolyzed products of cyclic oligomeric compounds (in the present invention, sometimes referred to as “surface-treated infrared absorbing fine particles”). ). And the said surface-treated infrared rays absorption fine particle discovered that it had the outstanding heat-and-moisture resistance.
- the present inventors have come up with an infrared-absorbing transparent substrate having a coating layer in which the surface-treated infrared-absorbing fine particles are dispersed. Further, the present invention has also been conceived that a surface-treated infrared absorbing fine particle dispersion in which the surface-treated infrared absorbing fine particles are dispersed in a predetermined liquid medium is suitable as a coating liquid for forming the coating layer. Was completed.
- the first invention for solving the above-described problem is A surface-treated infrared absorbing fine particle dispersion in which surface-treated infrared absorbing fine particles are dispersed in a liquid medium
- the surface of the fine particles is a hydrolysis product of a metal chelate compound, a polymer of a hydrolysis product of a metal chelate compound, a hydrolysis product of a metal cyclic oligomer compound, or a metal cyclic oligomer compound.
- the second invention is The surface-treated infrared absorbing fine particles according to the first invention, wherein the metal chelate compound or the metal cyclic oligomer compound contains one or more metal elements selected from Al, Zr, Ti, Si, and Zn. It is a dispersion.
- the third invention is The surface-treated infrared ray according to the first or second invention, wherein the metal chelate compound or the metal cyclic oligomer compound has at least one selected from an ether bond, an ester bond, an alkoxy group, and an acetyl group. Absorption fine particle dispersion.
- the fourth invention is:
- the infrared-absorbing fine particles have the general formula WyOz (W is tungsten, O is oxygen, 2.2 ⁇ z / y ⁇ 2.999), or / and the general formula MxWyOz (where M is H, He, Alkali metal, alkaline earth metal, rare earth element, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In , Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be, Hf, Os, Bi, I, Yb
- W is tungsten
- O is oxygen, 0.001 ⁇ x / y ⁇ 1, 2.0 ⁇ z / y ⁇ 3.0
- the surface according to any one of the first to third inventions, wherein It
- the fifth invention is: Said M is one or more elements selected from Cs, K, Rb, Tl, In and Ba.
- the sixth invention is: The surface-treated infrared absorbing fine particles according to any one of the first to fifth inventions, wherein the infrared absorbing fine particles are tungsten oxide fine particles and / or composite tungsten oxide fine particles having a hexagonal crystal structure. It is a dispersion.
- the seventh invention The surface-treated infrared absorbing fine particle dispersion according to any one of the first to sixth inventions, wherein the surface-treated infrared absorbing fine particle dispersion further contains a glass coating agent.
- the liquid medium is at least one selected from aromatic hydrocarbons, ketones, ethers, alcohols, and water;
- the ninth invention The liquid medium is at least one selected from aromatic hydrocarbons, ketones, ethers;
- the tenth invention is An infrared-absorbing transparent substrate having a coating layer on at least one surface of one or more transparent substrates,
- the coating layer includes surface-treated infrared absorbing fine particles,
- the surface of the fine particles is a hydrolysis product of a metal chelate compound, a polymer of a hydrolysis product of a metal chelate compound, a hydrolysis product of a metal cyclic oligomer compound, or a metal cyclic oligomer compound.
- An infrared-absorbing transparent base material characterized in that the infrared-absorbing fine particles are coated with a film containing one or more kinds selected from a hydrolysis product polymer.
- the eleventh invention is The infrared-absorbing transparent substrate according to the tenth invention, wherein the metal chelate compound or the metal cyclic oligomer compound contains one or more metal elements selected from Al, Zr, Ti, Si, and Zn. It is.
- the twelfth invention is The infrared absorbing transparent material according to the tenth or eleventh invention, wherein the metal chelate compound or the metal cyclic oligomer compound has at least one selected from an ether bond, an ester bond, an alkoxy group, and an acetyl group. It is a substrate.
- the infrared-absorbing fine particles have the general formula WyOz (W is tungsten, O is oxygen, 2.2 ⁇ z / y ⁇ 2.999), or / and the general formula MxWyOz (where M is H, He, Alkali metal, alkaline earth metal, rare earth element, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In , Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be, Hf, Os, Bi, I, Yb
- W is tungsten
- O is oxygen, 0.001 ⁇ x / y ⁇ 1, 2.0 ⁇ z / y ⁇ 3.0
- the fourteenth invention is The infrared absorbing transparent base material according to the thirteenth aspect, wherein M is one or more elements selected from Cs, K, Rb, Tl, In, and Ba.
- the fifteenth invention 15 The infrared-absorbing transparent substrate according to any one of the tenth to fourteenth aspects, wherein the infrared-absorbing fine particles are tungsten oxide fine particles and / or composite tungsten oxide fine particles having a hexagonal crystal structure. It is.
- the sixteenth invention is The infrared absorbing transparent substrate according to any one of the tenth to fifteenth inventions, wherein the coating layer further contains a glass coating agent.
- the seventeenth invention The infrared-absorbing transparent substrate according to the sixteenth invention, wherein the glass coating agent is at least one selected from a silane coupling agent, a silane-based alkoxide, a polysilazane, and a polyorganosilane.
- the eighteenth invention The transparent substrate according to any one of the tenth to seventeenth aspects, wherein the transparent substrate is at least one selected from a transparent glass substrate and a transparent resin substrate. .
- the surface-treated infrared-absorbing fine particles according to the present invention and the surface-treated infrared-absorbing fine particle powder containing them have excellent infrared absorption characteristics and are excellent in heat and moisture resistance.
- the surface-treated infrared-absorbing fine particle dispersion containing the surface-treated infrared-absorbing fine particles is used as a coating liquid, and by providing a coating layer on a predetermined substrate, it has excellent infrared absorption characteristics and excellent heat and heat resistance. Infrared absorbing transparent base material can be obtained.
- FIG. 2 is a schematic plan view of a crystal structure in a composite tungsten oxide having a hexagonal crystal structure.
- 3 is a transmission electron micrograph of 300,000 times the surface-treated infrared absorbing fine particles according to Example 1.
- the infrared-absorbing transparent substrate having a coating layer in which the surface-treated infrared-absorbing fine particles according to the present invention are dispersed, and the surface-treated infrared-absorbing fine particle dispersion which is a coating liquid for suitably forming the coating layer 1) Infrared absorbing fine particles, [2] Infrared absorbing fine particle surface treatment agent, [3] Infrared absorbing fine particle surface coating method, [4] Surface treated infrared absorbing fine particle powder, [5] Surface treated infrared absorbing fine particle powder [6] Surface-treated infrared absorbing fine particle dispersion and [7] Infrared absorbing transparent substrate will be described in detail in this order.
- Infrared-absorbing fine particles are represented by the general formula WyOz (W is tungsten, O is Oxygen, 2.2 ⁇ z / y ⁇ 2.999), and / or general formula MxWyOz (where M is H, He, alkali metal, alkaline earth metal, rare earth element, Mg, Zr, Cr, Mn) Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P , S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be, Hf, Os, Bi, I, Yb, one or more elements, W is tungsten, O is Oxygen, 2.2 ⁇ z / y ⁇ 2.999), and / or general formula MxWyOz (where M is H, He, alkali metal, alkaline earth metal, rare earth element
- a material containing free electrons exhibits a reflection / absorption response to electromagnetic waves around a solar ray region having a wavelength of 200 nm to 2600 nm by plasma oscillation. And, it is known that when the powder particles of such a material are particles smaller than the wavelength of light, the geometric scattering in the visible light region (wavelength 380 nm to 780 nm) is reduced and transparency in the visible light region can be obtained. Yes.
- “transparency” is used to mean “highly transmissive with little scattering with respect to light in the visible light region”.
- tungsten oxide tungsten oxide
- the absorption and reflection characteristics in the infrared region are small and it is not effective as an infrared absorbing fine material.
- WO 3 having oxygen vacancies and a composite tungsten oxide in which a positive element such as Na is added to WO 3 are used to generate free electrons in the tungsten oxide and the composite tungsten oxide, and the infrared region. It is known that free electron-derived absorption characteristics are developed. And the analysis of the single crystal of the material having these free electrons suggests the response of free electrons to light in the infrared region.
- the present inventors have found that there is a particularly effective range as an infrared absorbing fine particle in a specific portion of the composition range of tungsten and oxygen, and tungsten oxidation is transparent in the visible light region and has absorption in the infrared region.
- I have come up with fine particles and composite tungsten oxide particles.
- the tungsten oxide fine particles or / and the composite tungsten oxide fine particles which are the infrared absorbing fine particles according to the present invention, are (1) tungsten oxide fine particles, (2) composite tungsten oxide fine particles, (3) infrared absorbing fine particles, This will be explained in the order.
- Tungsten oxide fine particles The tungsten oxide fine particles according to the present invention have a general formula WyOz (where W is tungsten, O is oxygen, 2.2 ⁇ z / y ⁇ 2.999). Of fine particles.
- the composition range of the tungsten and oxygen is such that free electrons are generated in the tungsten oxide when the composition ratio of oxygen to tungsten is less than 3. It has been known. Furthermore, when the infrared absorbing fine particles are described as WyOz, it is preferable that 2.2 ⁇ z / y ⁇ 2.999. If the value of z / y is 2.2 or more, it is possible to avoid the appearance of a WO 2 crystal phase other than the target in the tungsten oxide, and the chemical stability as a material. Therefore, effective infrared absorbing fine particles are obtained. On the other hand, if the value of z / y is 2.999 or less, a required amount of free electrons is generated and the infrared absorbing fine particles are efficiently obtained.
- Composite tungsten oxide is obtained by adding the element M described later to the above-described composite tungsten oxide (WO 3 ). Further, more efficient infrared absorbing fine particles can be obtained by using both the control of the oxygen amount and the addition of the element M that generates free electrons for the WO 3 . By adopting this configuration, free electrons are generated in the composite tungsten oxide, and strong absorption characteristics derived from free electrons are developed particularly in the near infrared region, which is effective as near infrared absorbing fine particles having a wavelength of around 1000 nm.
- infrared-absorbing fine particles combining the control of the amount of oxygen and the addition of the element M that generates free electrons is described as MxWyOz (where M is an element M, W is tungsten, and O is oxygen, which will be described later).
- MxWyOz where M is an element M, W is tungsten, and O is oxygen, which will be described later.
- infrared absorbing fine particles satisfying the relations of 0.001 ⁇ x / y ⁇ 1 and 2.2 ⁇ z / y ⁇ 3 are desirable.
- the element M in the composite tungsten oxide is H, He, alkali metal, alkaline earth metal, rare earth element, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, One or more kinds selected from Mo, Ta, Re, Be, Hf, Os, Bi, I, and Yb are preferable.
- the element M is an alkali metal, an alkaline earth metal, a rare earth element, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, More preferably, the element is one or more elements selected from Nb, V, Mo, Ta, and Re.
- the element M belongs to an alkali metal, an alkaline earth metal element, a transition metal element, a group 4B element, and a group 5B element. Further preferred.
- the value of x / y indicating the amount of element M added
- the value of x / y is greater than 0.001
- a sufficient amount of free electrons are generated in the composite tungsten oxide, and the intended infrared absorption effect is obtained. I can do it.
- the value of x / y is about 1, the effect is saturated.
- the value of x / y is smaller than 1 because the generation of an impurity phase in the infrared absorbing fine particles can be avoided.
- FIG. 1 is a schematic plan view of the hexagonal crystal structure.
- six octahedrons formed of WO 6 units indicated by reference numeral 11 are assembled to form a hexagonal void, and an element M indicated by reference numeral 12 is arranged in the void to form one piece.
- a unit is formed, and a large number of these one units are assembled to form a hexagonal crystal structure.
- the unit structure described with reference to FIG. 1 is included in the composite tungsten oxide fine particles.
- the composite tungsten oxide fine particles may be crystalline or amorphous.
- the addition amount of the element M is preferably 0.2 or more and 0.5 or less in terms of x / y, more preferably 0.8. 33.
- the value of x / y is 0.33, it is considered that the element M described above is arranged in all hexagonal voids.
- the cation of the element M is added to the hexagonal void, the light transmission in the visible light region is improved and the light absorption in the infrared region is improved.
- the element M having a large ionic radius is added, the hexagonal crystal is easily formed.
- one or more of Cs, K, Rb, Tl, In, Ba, Li, Ca, Sr, Fe, and Sn more preferably one of Cs, K, Rb, Tl, In, and Ba.
- hexagonal crystals are easily formed. Typical examples include Cs 0.33 WO z , Cs 0.03 Rb 0.30 WO z , Rb 0.33 WO z , K 0.33 WO z , Ba 0.33 WO z (2.0 ⁇ z ⁇ 3.0).
- other elements may be used as long as the element M described above is present in the hexagonal void formed by the WO 6 unit, and is not limited to the elements described above.
- tetragonal and cubic composite tungsten oxides other than hexagonal crystals are also effective as infrared absorbing fine particles.
- the absorption position in the infrared region tends to change depending on the crystal structure, and the absorption position tends to move to the longer wavelength side in the order of cubic ⁇ tetragonal ⁇ hexagonal.
- it is in the order of hexagonal crystal, tetragonal crystal, and cubic crystal that has little absorption in the visible light region. Therefore, it is preferable to use a hexagonal composite tungsten oxide for the purpose of transmitting light in the visible region and shielding light in the infrared region.
- the tendency of the optical characteristics described here is merely a rough tendency, and changes depending on the kind of additive element, the amount of addition, and the amount of oxygen, and the present invention is not limited to this.
- the infrared absorbing fine particles according to the present invention contain the above-described tungsten oxide fine particles and / or composite tungsten oxide fine particles.
- the infrared absorbing fine particles according to the present invention absorb a large amount of light in the near infrared region, particularly in the vicinity of a wavelength of 1000 nm, so that the transmitted color tone is often in the blue to green range.
- the infrared-absorbing fine particles according to the present invention preferably have a particle size of 1 nm to 800 nm, more preferably 100 nm or less.
- the particle diameter of the fine particles is preferably 10 nm or more and 100 nm or less, more preferably 10 nm or more and 80 nm or less, and most preferably 10 nm or more and 60 nm or less. It has been found that the most excellent infrared absorption characteristics are exhibited when the particle diameter is in the range of 10 nm to 60 nm.
- the particle diameter is an average value of the diameters of the individual infrared absorbing fine particles not aggregated, and is included in the infrared absorbing transparent base material, the surface-treated infrared absorbing fine particle dispersion, and the surface-treated infrared absorbing fine particle powder described later. It is the average particle diameter of infrared absorbing fine particles.
- the particle diameter is calculated from an electron microscope image of infrared absorbing fine particles.
- the dispersed particle size of the infrared absorbing fine particles according to the present invention can be selected depending on the purpose of use.
- the dispersed particle size is a concept including the particle size of the aggregate unlike the particle size described above.
- the particles have a dispersed particle diameter of 800 nm or less. This is because particles having a dispersed particle diameter smaller than 800 nm do not completely block light by scattering, and can maintain visibility in the visible light region and at the same time efficiently maintain transparency. . In particular, when importance is attached to transparency in the visible light region, it is preferable to further consider scattering by particles.
- the dispersed particle diameter is 200 nm or less, preferably 100 nm or less.
- the dispersed particle size of the particles is small, the scattering of light in the visible light region having a wavelength of 400 nm to 780 nm due to geometrical scattering or Mie scattering is reduced, and as a result, the infrared absorbing film becomes like frosted glass, It can be avoided that clear transparency is not obtained. That is, when the dispersed particle diameter is 200 nm or less, the geometric scattering or Mie scattering is reduced, and a Rayleigh scattering region is obtained.
- the scattered light is proportional to the sixth power of the particle diameter, so that the scattering is reduced and the transparency is improved as the dispersed particle diameter is reduced. Furthermore, when the dispersed particle diameter is 100 nm or less, the scattered light is preferably very small. From the viewpoint of avoiding light scattering, it is preferable that the dispersed particle diameter is small. If the dispersed particle diameter is 1 nm or more, industrial production is easy.
- the haze value of the infrared-absorbing fine particle dispersion in which the infrared-absorbing fine particles according to the present invention are dispersed in a medium is 85% or less for visible light transmittance and 30% or less for haze. I can do it. If the haze is greater than 30%, it becomes like frosted glass, and clear transparency cannot be obtained.
- the dispersed particle size of the infrared absorbing fine particles can be measured using ELS-8000 manufactured by Otsuka Electronics Co., Ltd. based on the dynamic light scattering method.
- the crystallite diameter of the infrared absorbing fine particles is preferably 1 nm to 200 nm, more preferably 1 nm to 100 nm, and still more preferably 10 nm to 70 nm.
- X-ray diffraction pattern For the measurement of the crystallite diameter, measurement of an X-ray diffraction pattern by a powder X-ray diffraction method ( ⁇ -2 ⁇ method) and analysis by a Rietveld method are used.
- the X-ray diffraction pattern can be measured using, for example, a powder X-ray diffractometer “X'Pert-PRO / MPD” manufactured by Spectris Corporation PANalytical.
- the surface treatment agent used for the surface coating of infrared absorbing fine particles according to the present invention includes a hydrolysis product of a metal chelate compound, a polymer of a hydrolysis product of a metal chelate compound, and a metal ring. It is 1 or more types selected from the hydrolysis product of an oligomer compound, and the polymer of the hydrolysis product of a metal cyclic oligomer compound.
- the metal chelate compound and the metal cyclic oligomer compound are preferably a metal alkoxide, a metal acetylacetonate, and a metal carboxylate, one or more selected from an ether bond, an ester bond, an alkoxy group, and an acetyl group It is preferable to have.
- the surface treatment agent for infrared absorbing fine particles (1) metal chelate compound, (2) metal cyclic oligomer compound, (3) hydrolysis product of metal chelate compound or metal cyclic oligomer compound, and These polymers and (4) addition amount of the surface treatment agent will be described in this order.
- the metal chelate compound used in the present invention is preferably at least one selected from Al-based, Zr-based, Ti-based, Si-based, and Zn-based chelate compounds containing an alkoxy group.
- aluminum-based chelate compounds include aluminum alcoholates such as aluminum ethylate, aluminum isopropylate, aluminum sec-butyrate, mono-sec-butoxyaluminum diisopropylate, or polymers thereof, ethyl acetoacetate aluminum diisopropylate, aluminum tris (Ethyl acetoacetate), octyl acetoacetate aluminum diisoproprate, stearyl acetoaluminum diisopropylate, aluminum monoacetylacetonate bis (ethylacetoacetate), aluminum tris (acetylacetonate) and the like can be exemplified.
- aluminum alcoholates such as aluminum ethylate, aluminum isopropylate, aluminum sec-butyrate, mono-sec-butoxyaluminum diisopropylate, or polymers thereof, ethyl acetoacetate aluminum diisopropylate, aluminum tris (Ethyl acetoacetate), octyl
- These compounds are obtained by dissolving aluminum alcoholate in an aprotic solvent, petroleum solvent, hydrocarbon solvent, ester solvent, ketone solvent, ether solvent, amide solvent, and the like.
- An alkoxy compound-containing aluminum chelate compound obtained by adding a diketone, ⁇ -ketoester, mono- or polyhydric alcohol, fatty acid and the like, heating to reflux, and substituting the ligand.
- zirconia-based chelate compounds include zirconium alcoholates such as zirconium ethylate and zirconium butyrate or their polymers, zirconium tributoxy systemate, zirconium tetraacetylacetonate, zirconium tributoxyacetylacetonate, zirconium dibutoxybis (acetyl). Acetonate), zirconium tributoxyethyl acetoacetate, zirconium butoxyacetylacetonate bis (ethyl acetoacetate), and the like.
- zirconium alcoholates such as zirconium ethylate and zirconium butyrate or their polymers
- zirconium tributoxy systemate zirconium tetraacetylacetonate
- zirconium tributoxyacetylacetonate zirconium dibutoxybis (acetyl).
- Acetonate zirconium tributoxye
- Titanium-based chelate compounds include titanium alcoholates such as methyl titanate, ethyl titanate, isopropyl titanate, butyl titanate, 2-ethylhexyl titanate and their polymers, titanium acetylacetonate, titanium tetraacetylacetonate, titanium octylene glycolate , Titanium ethyl acetoacetate, titanium lactate, titanium triethanolamate, and the like.
- a tetrafunctional silane compound represented by the general formula Si (OR) 4 (wherein R is the same or different monovalent hydrocarbon group having 1 to 6 carbon atoms) or a hydrolysis thereof.
- R is the same or different monovalent hydrocarbon group having 1 to 6 carbon atoms
- the product can be used.
- Specific examples of the tetrafunctional silane compound include tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, and tetrabutoxysilane.
- silane monomers or oligomers
- silanol groups Si—OH
- polymers that are self-condensed through hydrolysis reactions Is also possible.
- a hydrolysis product of the tetrafunctional silane compound meaning the entire hydrolysis product of the tetrafunctional silane compound
- a part or all of the alkoxy groups are hydrolyzed to produce silanol (Si— OH monomer-based silane monomer, tetramer to pentamer oligomer, and polymer (silicone resin) having a weight average molecular weight (Mw) of about 800 to 8,000.
- Mw weight average molecular weight
- Examples of zinc-based chelate compounds include organic carboxylic acid zinc salts such as zinc octylate, zinc laurate, and zinc stearate, acetylacetone zinc chelate, benzoylacetone zinc chelate, dibenzoylmethane zinc chelate, ethyl zinc acetoacetate chelate, and the like. Preferred examples can be given.
- Metal cyclic oligomer compound is preferably at least one selected from Al, Zr, Ti, Si, and Zn cyclic oligomer compounds. Examples thereof include cyclic aluminum oxide octylate, cyclic aluminum oxide isopropylate, and cyclic aluminum oxide sterate.
- Hydrolysis products of metal chelate compounds and metal cyclic oligomer compounds, and their polymers the total amount of alkoxy groups, ether bonds, and ester bonds in the metal chelate compounds and metal cyclic oligomer compounds described above is Hydrolysis products that have been hydrolyzed into hydroxyl groups or carboxyl groups, partially hydrolyzed products that have been partially hydrolyzed, and / or polymers that have undergone self-condensation through the hydrolysis reaction are related to the present invention.
- the surface of the infrared absorbing fine particles is coated to form a coating film, and the surface-treated infrared absorbing fine particles according to the present invention are obtained.
- the hydrolysis product in the present invention is a concept including a partial hydrolysis product.
- the coating film formed using one or more selected from the hydrolysis product of (1) or a polymer of the hydrolysis product of the metal cyclic oligomer compound may be simply referred to as “coating film”.
- the coating film may contain an undecomposed metal chelate compound and / or a metal cyclic oligomer compound.
- the coating film contains an undecomposed metal chelate compound or / and a metal cyclic oligomer compound
- a silane coupling agent or a silane in a glass coating agent used when an infrared-absorbing transparent base material is produced in a later step There is a risk that the hydrolysis reaction of alkoxide and polysilazane and the dehydration condensation reaction may proceed rapidly.
- a polymer of silane coupling agent, silane alkoxide, and polysilazane acts as a crosslinking agent, causing aggregation of the surface-treated infrared absorbing fine particles in the surface-treated infrared absorbing fine particle dispersion, and visible light.
- the coating film contains an undecomposed metal chelate compound and / or metal cyclic oligomer compound, the decomposition of these compounds is promoted by a heat treatment described later, and hydrolysis with low reactivity is performed. It is preferable to make it react until it becomes a polymer of a product.
- the coating film covering the surface of the infrared absorbing fine particles according to the present invention is obtained by hydrolyzing a part or all of alkoxy groups, ether bonds, and ester bonds in the metal chelate compound or metal cyclic oligomer compound described above. It is preferable that the hydrolysis product which becomes a group or a carboxyl group is a polymer obtained by self-condensation through the hydrolysis reaction.
- the addition amount of the metal chelate compound or metal cyclic oligomer compound described above is 0.05 to 1000 parts by weight in terms of metal element with respect to 100 parts by weight of the infrared absorbing fine particles. Is preferred. More preferably, it is in the range of 5 parts by weight or more and 500 parts by weight or less, and still more preferably 50 parts by weight or more and 250 parts by weight or less.
- the hydrolysis product of these compounds and the polymer of the hydrolysis product may cause the surface of the infrared-absorbing fine particles to reach the surface.
- the effect of covering is exhibited and the effect of improving heat and humidity resistance is obtained.
- the addition amount of a metal chelate compound or a metal cyclic oligomer compound is 1000 weight part or less, it can avoid that the adsorption amount with respect to infrared rays absorption fine particle becomes excess.
- the improvement of the heat-and-moisture resistance by surface coating is not saturated, and the improvement of a coating effect can be expected.
- the addition amount of the metal chelate compound or metal cyclic oligomer compound is 1000 parts by weight or less, the adsorption amount to the infrared absorbing fine particles becomes excessive, and the metal chelate compound or metal cyclic oligomer compound is hydrolyzed when the medium is removed. This is because it can be avoided that the fine particles are easily granulated through a product or a polymer of the hydrolysis product. By avoiding undesired granulation by the fine particles, good transparency can be ensured. In addition, an increase in production cost due to an increase in addition amount and processing time due to an excess of metal chelate compound or metal cyclic oligomer compound can be avoided. Therefore, the addition amount of the metal chelate compound or metal cyclic oligomer compound is preferably 1000 parts by weight or less from an industrial viewpoint.
- the film thickness of the coating film of the surface-treated infrared absorbing fine particles according to the present invention is 0.5 nm or more. This is because the surface-treated infrared-absorbing fine particles are considered to exhibit sufficient moist heat resistance and chemical stability if the thickness of the coating film is 0.5 nm or more.
- the thickness of the coating film is preferably 100 nm or less from the viewpoint of ensuring that the surface-treated infrared absorbing fine particles have predetermined optical characteristics. From the above, the thickness of the coating film is more preferably from 0.5 nm to 20 nm, and even more preferably from 1 nm to 10 nm.
- the film thickness of the coating film can be measured from a transmission electron microscope image of the surface-treated infrared absorbing fine particles.
- a transmission electron microscope image of the surface-treated infrared-absorbing fine particles according to Example 1 shown in FIG. 2 that is 300,000 times transmission electron microscope image
- the infrared-absorbing fine particle lattice fringes (atomic atoms in the crystal)
- the portion in which no alignment is observed corresponds to the coating film.
- the infrared-absorbing fine particles are water or an organic solvent containing water.
- An infrared-absorbing fine particle dispersion for forming a coating film (which may be referred to as “dispersion for forming a coating film” in the present invention) is prepared.
- the surface treatment agent described in “[2] Surface treatment agent for infrared absorbing fine particles” is prepared. And a surface treating agent is added here, mixing and stirring the dispersion liquid for coating film formation.
- the surface of the infrared-absorbing fine particle is a hydrolysis product of the metal chelate compound, a polymer of the hydrolysis product of the metal chelate compound, a hydrolysis product of the metal cyclic oligomer compound, or a hydrolysis product of the metal cyclic oligomer compound. It is coated with a coating film containing at least one selected from polymers.
- water or an appropriate organic solvent containing water is preliminarily pulverized, for example, tungsten oxide and / or composite tungsten oxide, which are infrared absorbing fine particles. It is preferable to disperse it in a monodispersed state. At this time, the dispersion concentration of tungsten oxide and / or composite tungsten oxide is preferably 0.01% by mass or more and 80% by mass or less. Within this dispersion concentration range, the liquid stability of the dispersion is excellent.
- the dispersed particle size can be maintained in the range of 1 to 200 nm. It is important that the dispersion state is ensured during the pulverization and dispersion treatment steps so that the fine particles do not aggregate. This is because in the course of the surface treatment of the infrared absorbing fine particles, which is the next step, the infrared absorbing fine particles are aggregated to be surface-coated in the state of aggregates. This is to avoid a situation in which the transparency of the infrared-absorbing fine particle dispersion and the infrared-absorbing base material described later deteriorates.
- the pulverization / dispersion method include a pulverization / dispersion method using an apparatus such as a bead mill, a ball mill, a sand mill, a paint shaker, or an ultrasonic homogenizer.
- pulverization and dispersion treatment with a medium agitation mill such as a bead mill, a ball mill, a sand mill, or a paint shaker using a medium such as beads, balls, or Ottawa Sand requires that the desired dispersed particle size be reached. It is preferable because the time is short.
- the surface treatment agent is added while mixing and stirring the prepared dispersion for forming a coating film. At this time, it is desirable to dilute the coating film-forming dispersion to an appropriate concentration with water or an appropriate organic solvent containing water. If the dispersion concentration of the tungsten oxide and / or composite tungsten oxide, which is the infrared absorbing fine particles, is diluted to 0.1 mass% to 20 mass%, more preferably 1 mass% to 10 mass%, infrared absorption is achieved. This is because all of the fine particles are uniformly surface-coated.
- the hydrolysis reaction of the surface treatment agent is always preceded, followed by the polymerization reaction of the generated hydrolysis product.
- the amount of carbon C remaining in the surface treatment agent molecules present in the coating film can be reduced as compared with the case where water is not used as the medium. It is thought that the coating film which coats the surface of each infrared absorption fine particle with high density could be formed by reducing the carbon C remaining amount in the surface treatment agent molecule existing in the coating film. .
- the surface treatment agent At the time of dropwise addition of the surface treatment agent, it is also preferable to add dropwise the surface treatment agent itself diluted with an appropriate solvent in order to adjust the amount of the surface treatment agent added per hour.
- a solvent that does not react with the surface treatment agent and is highly compatible with water, which is a medium of the dispersion for forming a coating film is preferable.
- alcohol-based, ketone-based and glycol-based solvents can be preferably used.
- the dilution factor of the surface treatment agent is not particularly limited. However, from the viewpoint of ensuring productivity, the dilution factor is preferably 100 times or less.
- a metal chelate compound, a metal cyclic oligomer compound, a hydrolysis product thereof, and a polymer of the hydrolysis product are converted into a metal ion immediately after the addition.
- the saturated aqueous solution is obtained, the decomposition to the metal ions is completed.
- the infrared absorbing fine particles according to the present invention are kept dispersed by electrostatic repulsion.
- the surface of all infrared absorbing fine particles is a hydrolysis product of a metal chelate compound, a polymer of a hydrolysis product of a metal chelate compound, a hydrolysis product of a metal cyclic oligomer compound, and a hydrolysis of a metal cyclic oligomer compound. It is considered that the surface-treated infrared-absorbing fine particles according to the present invention are formed by being coated with a coating film containing at least one selected from the product polymer.
- the surface treatment agent according to the present invention and pure water are dropped in parallel while stirring and mixing a dispersion for forming a coating film using an organic solvent as a medium.
- the medium temperature affecting the reaction rate and the dropping rate of the surface treatment agent and pure water are appropriately controlled.
- an organic solvent what is necessary is just a solvent which melt
- the surface treatment agent is added dropwise, in order to adjust the amount of the surface treatment agent added per hour, the surface treatment agent itself diluted with an appropriate solvent is added dropwise. It is preferable to add.
- the solvent used for dilution is preferably a solvent that does not react with the surface treatment agent and is highly compatible with an organic solvent containing water, which is a medium for the dispersion for forming a coating film.
- an organic solvent containing water which is a medium for the dispersion for forming a coating film.
- alcohol-based, ketone-based and glycol-based solvents can be preferably used.
- compatibility at the time of using a commercially available metal chelate compound and a metal cyclic oligomer compound as a surface treating agent, and the dilution rate of a surface treating agent it is the same as that of said (1).
- the surface-treated infrared-absorbing fine particle powder according to the present invention is coated with a dispersion (coating film-forming dispersion, surface treatment agent, It is obtained by removing the solvent in a mixture of solvents such as water).
- a dispersion coating film-forming dispersion, surface treatment agent, It is obtained by removing the solvent in a mixture of solvents such as water.
- a dryer, a freeze dryer, a ribocorn, a rotary kiln, a spray dryer, a pulcon dryer, and the like are preferable, but not limited thereto.
- the drying treatment is desirably performed at a temperature higher than the volatilization of the solvent in the dispersion liquid and at a temperature at which the element M does not desorb in the air atmosphere. It is desirable that the temperature is not higher than ° C.
- the heat treatment temperature is preferably equal to or higher than the temperature at which the metal chelate compound and / or metal cyclic oligomer compound is decomposed, and lower than the temperature at which the infrared absorbing fine particles start to crystallize.
- the temperature is preferably in the temperature range of 200 ° C. or higher and lower than 500 ° C.
- the heat treatment atmosphere is desirably an inert gas atmosphere.
- the decomposition of the undecomposed metal chelate compound and / or metal cyclic oligomer compound can be promoted without causing the infrared-absorbing fine particles to grow, whereby the surface-treated infrared-absorbing fine particles according to the present invention can be obtained.
- liquid medium one or more liquid media selected from organic solvents, oils and fats, liquid plasticizers, compounds that are polymerized by curing, and water can be preferably used.
- Organic solvent As the organic solvent used in the surface-treated infrared-absorbing fine particle dispersion according to the present invention, alcohol-based, ketone-based, hydrocarbon-based, glycol-based, aqueous-based, and the like can be used.
- alcohol solvents such as methanol, ethanol, 1-propanol, isopropanol, butanol, pentanol, benzyl alcohol, diacetone alcohol; Ketone solvents such as acetone, methyl ethyl ketone, dimethyl ketone, methyl propyl ketone, methyl isobutyl ketone, cyclohexanone, isophorone; Ester solvents such as 3-methyl-methoxy-propionate and n-butyl acetate; Glycol derivatives such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol isopropyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate; Amides such as formamide, N-methylformamide, dimethylformamide, dimethylacetamide, N-
- dimethyl ketone dimethyl ketone, methyl ethyl ketone, methyl isobutyl ketone, toluene, propylene glycol monomethyl ether acetate, n-butyl acetate, and the like can be preferably used.
- Fats and oils As the fats and oils used for the surface-treated infrared absorbing fine particle dispersion according to the present invention, vegetable oils or compounds derived from vegetable oils are preferable. Vegetable oils include dry oil such as linseed oil, sunflower oil, tung oil, eno oil, semi-dry oils such as sesame oil, cottonseed oil, rapeseed oil, soybean oil, rice bran oil, poppy oil, olive oil, coconut oil, palm oil, dehydrated castor oil Non-drying oils such as can be used. As the vegetable oil-derived compound, fatty acid monoesters, ethers, and the like obtained by directly esterifying the fatty acids of vegetable oils with monoalcohols can be used.
- commercially available petroleum solvents can also be used as fats and oils.
- Commercially available petroleum solvents include (registered trademark) Isopar E, Exol Hexane, Exol Heptane, Exol E, Exol D30, Exol D40, Exol D60, Exol D80, Exol D95, Exol D110, Exol D130 (above, manufactured by ExxonMobil) , Etc. can be used.
- liquid plasticizer added to the surface-treated infrared-absorbing fine particle dispersion according to the present invention examples include a plasticizer that is a compound of a monohydric alcohol and an organic acid ester, and a polyhydric alcohol organic acid ester compound.
- An ester plasticizer such as an organic phosphoric acid plasticizer such as an organic phosphoric acid plasticizer can be used.
- all are liquid at room temperature.
- a plasticizer that is an ester compound synthesized from a polyhydric alcohol and a fatty acid can be preferably used.
- the ester compound synthesized from the polyhydric alcohol and the fatty acid is not particularly limited.
- glycol such as triethylene glycol, tetraethylene glycol, tripropylene glycol, butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid
- glycol ester compounds obtained by reaction with monobasic organic acids such as heptylic acid, n-octylic acid, 2-ethylhexylic acid, pelargonic acid (n-nonyl acid), decyl acid, etc. I can do it.
- ester compounds of tetraethylene glycol, tripropylene glycol and the monobasic organic can be used.
- fatty acid esters of triethylene glycol such as triethylene glycol dihexanate, triethylene glycol di-2-ethylbutyrate, triethylene glycol di-octanoate, triethylene glycol di-2-ethylhexanate, etc. It can be preferably used. Furthermore, fatty acid esters of triethylene glycol can also be preferably used.
- abrasion resistance can be imparted to the infrared-absorbing transparent base material according to the present invention. From this viewpoint, it is preferable that a glass coating agent is further contained in the surface-treated infrared-absorbing fine particle dispersion according to the present invention.
- a metal alkoxide or a metal organic compound containing any one or more of Sn, Ti, In, Si, Zr, and Al can be used.
- a compound containing Si is preferable, and a silane coupling agent, a silane alkoxide, a polyorganosiloxane, a polysilazane, an organic group bonded to a silicon atom, and one or more of the organic groups have a reactive functional group.
- an organosilicon compound which is an organic group In addition, all are liquid at room temperature.
- polysilazane for example, perhydropolysilazane, partially organic polysilazane, organosilazane and the like can be used.
- organosilicon compound having an organic group bonded to a silicon atom and one or more of the organic groups having a reactive functional group include amino groups, mercapto groups, epoxy groups, and (meth) acryloyloxy groups.
- a compound containing Si having as a reactive group is preferable.
- the liquid medium is selected from aromatic hydrocarbons, ketones, ethers, alcohols, and water. It is preferable that it is 1 or more types.
- the glass coating agent is at least one selected from polysilazane and polyorganosilane
- the liquid medium may be at least one selected from aromatic hydrocarbons, ketones, and ethers. preferable.
- Acid From the viewpoint of promoting hydrolysis of the hydrolyzable silicon monomer and the like contained in the glass coating agent described above, it is also preferable to add an acid to the surface-treated infrared-absorbing fine particle dispersion according to the present invention.
- the acid added to the surface-treated infrared-absorbing fine particle dispersion according to the present invention include nitric acid, hydrochloric acid, sulfuric acid, trichloroacetic acid, trifluoroacetic acid, phosphoric acid, methanesulfonic acid, paratoluenesulfonic acid, oxalic acid, and the like. I can do it. Volatile acids are preferred because they volatilize when heated and do not remain in the cured film.
- the acid serves as a catalyst for promoting hydrolysis of the hydrolyzable silicon monomer and the hydrolysis condensate of the silicon monomer.
- the amount of acid added to the dispersion can be set without particular limitation as long as the catalyst can play a role, but is preferably about 0.001 to 0.1 mol / L in volume ratio with respect to the total amount of the dispersion.
- Dispersant In the surface-treated infrared-absorbing fine particle dispersion according to the present invention, various dispersions are used in order to further improve the dispersion stability of the surface-treated infrared-absorbing fine particles and avoid coarsening of the dispersed particle diameter due to reaggregation. It is also preferable to add an agent, a surfactant, a coupling agent and the like.
- the dispersant, the coupling agent, and the surfactant can be selected according to the use, but preferably have an amine-containing group, a hydroxyl group, a carboxyl group, or an epoxy group as a functional group. These functional groups have the effect of adsorbing to the surface of the surface-treated infrared absorbing fine particles to prevent aggregation and uniformly disperse them.
- a polymer dispersant having any of these functional groups in the molecule is more preferable.
- dispersants include SOLPERSE (registered trademark) 3000, 9000, 11200, 13000, 13240, 13650, 13940, 16000, 17000, 18000, 20000, 21000, 24000SC, 24000GR, 26000, manufactured by Lubrizol.
- EFKA Additives EFKA (registered trademark) -4008, 4046, 4047, 4015, 4020, 4050, 4055, 4060, 4080, 4300, 4330, 4400, 4401, 4402, 4403, 4500, 4510, 4530, 4550, 4560, 4585, 4800, 5220, 6230, JONCRYL (registered trademark) -67, 678, 586, 611, 680, 682, 690, 819, JDX5050, etc.
- EFKA registered trademark
- the surface-treated infrared absorbing fine particle dispersion according to the present invention contains a small amount of various surfactants and resin components in a range of 5% by mass or less of the dispersion for controlling coating properties, leveling properties, and drying properties. It may be.
- Surfactants include anionic, cationic, nonionic, or amphoteric ones.
- a silicone resin in order to provide flexibility of the infrared absorbing transparent base material obtained using the dispersion, a silicone resin, an acrylic resin, a polyester resin, a polyurethane resin, a hydrophilic organic resin containing a polyoxyalkylene group, an epoxy resin
- Various organic resins such as may be contained in a small amount within a range of 5% by mass or less of the dispersion.
- a thermosetting resin, a thermoplastic resin, an ultraviolet curable resin, etc. are contained in 20 mass% or less of the said dispersion liquid. Also good. More specifically, acrylic resins, epoxy resins, polyester resins, amino resins, urethane resins, furan resins, silicone resins and modified products of these resins can be mentioned.
- the primary particles in the surface-treated infrared-absorbing fine particles are pulverized excessively by pulverization / dispersion treatment, an uncoated new surface may appear and the moisture and heat resistance may not be ensured. Therefore, it is preferable that the pulverization / dispersion process is kept to a minimum. In addition, it is preferable to add "(5) acid" mentioned above at the final stage of dispersion manufacturing from a viewpoint of suppressing excessive reaction with a glass coating agent.
- the infrared absorbing transparent substrate according to the present invention has a coating layer formed on at least one surface of the transparent substrate using the surface-treated infrared absorbing fine particle dispersion according to the present invention as a coating liquid. Is.
- the coating layer is obtained by curing the glass coating agent in which the surface-treated infrared absorbing fine particles according to the present invention are dispersed.
- the infrared-absorbing transparent substrate according to the present invention is excellent in wet heat resistance and chemical stability and can be suitably used as an infrared-absorbing material.
- the infrared absorbing transparent substrate (1) a transparent substrate used for the infrared absorbing transparent substrate, (2) a method for producing the infrared absorbing transparent substrate, (3) moisture and heat resistance characteristics of the infrared absorbing transparent substrate, ( 4) It demonstrates in order of the film thickness measurement of the coating layer on an infrared rays absorption transparent base material.
- Transparent base material used for infrared absorbing transparent base material Transparent glass base material and transparent resin base material can be used as the transparent base material, and there are problems in the surface condition and durability of the required board, sheet, and film. There is no particular limitation as long as it does not occur.
- Specific examples of the transparent glass substrate include functional glasses such as clear glass and green glass.
- Specific examples of the transparent resin substrate include, for example, polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, cellulose polymers such as diacetyl cellulose and triacetyl cellulose, polycarbonate polymers, acrylic polymers such as polymethyl methacrylate, polystyrene, and the like.
- Styrene polymers such as acrylonitrile / styrene copolymer, polyethylene, polypropylene, polyolefins having a cyclic or norbornene structure, olefin polymers such as ethylene / propylene copolymer, vinyl chloride polymers, amide polymers such as aromatic polyamides Imide polymer, sulfone polymer, polyether sulfone polymer, polyether ether ketone polymer, polyphenylene sulfide polymer Polymers, vinyl alcohol polymers, vinylidene chloride polymers, vinyl butyral polymers, arylate polymers, polyoxymethylene polymers, epoxy polymers, and their binary and ternary copolymers, graft copolymer Examples include boards, sheets, and films made of transparent polymers such as coalesces and blends.
- a coating layer is formed on a transparent base material by a known method and cured by a predetermined method.
- An infrared-absorbing transparent base material in which the surface-treated infrared fine particles according to the invention are dispersed in a solid medium can be produced.
- the curing method include a drying method, a method of curing by ultraviolet ray or electron beam irradiation, heat treatment, and the like.
- a method of curing the glass coating agent by heat treatment after forming the coating layer using a surface-treated infrared absorbing fine particle dispersion containing the glass coating agent is preferable. This is because by adopting this configuration, it is possible to impart wear resistance to the infrared absorbing transparent base material.
- the heat treatment temperature after forming the coating layer is preferably 100 ° C. or more and 600 ° C. or less, more preferably the boiling point or more of the solvent in the coating solution and less than 500 ° C. This is because when the heat treatment temperature is 100 ° C. or higher, the polymerization reaction of the metal alkoxide and / or the hydrolysis polymer of the metal alkoxide contained in the coating layer can be completed.
- the heat treatment temperature is 100 ° C. or higher, water or organic solvent as a solvent does not remain in the coating layer, and these solvents do not cause a reduction in visible light transmittance.
- the heat treatment temperature is 600 ° C. or lower, the thermal degradation of the surface-treated infrared absorbing fine particles can be suppressed.
- the infrared-absorbing transparent base material according to the present invention has a visible light transmittance of about 80% and is exposed to a moist heat atmosphere at a temperature of 85 ° C and a relative humidity of 90% for 9 days. , The amount of change in solar transmittance before and after the exposure is 4.0% or less, and it has excellent moisture and heat resistance.
- a stylus type surface roughness meter or the like can be used for measuring the film thickness of the coating layer on the infrared absorbing transparent substrate according to the present invention. Specifically, the surface-treated infrared absorbing fine particle dispersion is applied onto a predetermined smooth substrate to obtain a coating film. Before the coating film is cured, a part of the coating film is peeled off using a razor. The peeled coating film before curing is placed on another smooth base material and cured by an appropriate method to form a coating layer. Then, using a stylus type surface roughness meter, The film thickness can be obtained by measuring the level difference between the material and the coating layer.
- the dispersion particle size of the fine particles in the coating film-forming dispersions and surface-treated infrared absorbing fine particle dispersions in Examples and Comparative Examples is a particle size measuring device based on a dynamic light scattering method (ELS-8000 manufactured by Otsuka Electronics Co., Ltd.). ) And the average value measured.
- the crystallite size was measured by a powder X-ray diffraction method ( ⁇ -2 ⁇ method) using a powder X-ray diffractometer (X'Pert-PRO / MPD manufactured by Spectris Co., Ltd. PANalytical), and the Rietveld method was used.
- the film thickness of the coating film of the surface-treated infrared-absorbing fine particles is not observed from 300,000 times the photographic data obtained using a transmission electron microscope (HF-2200 manufactured by Hitachi, Ltd.). Using the portion as a coating film, the film thickness of the coating film was read.
- the film thickness of the coating layer on the infrared-absorbing transparent substrate according to the present invention was measured using a stylus type surface roughness meter (SURFCOM-5000DX manufactured by Tokyo Seimitsu Co., Ltd.).
- a surface-treated infrared absorbing fine particle dispersion is applied onto a glass substrate having a thickness of 3 mm using a predetermined bar coater to form a coating film.
- a part of the coating film is peeled off using a razor.
- the peeled coating film before curing is placed on another smooth glass substrate and cured by an appropriate method such as heat treatment to form a coating layer, thereby obtaining an infrared absorbing transparent substrate.
- step difference of a glass base material and a coating layer is measured, and the film thickness of a coating layer is obtained.
- the optical characteristics of the infrared-absorbing transparent substrate were measured using a spectrophotometer (U-4100, manufactured by Hitachi, Ltd.), and the visible light transmittance and the solar transmittance were calculated according to JIS R3106.
- the haze value of the infrared-absorbing transparent substrate was measured using a haze meter (HM-150, manufactured by Murakami Color Co., Ltd.) and calculated according to JISK7105.
- the method for evaluating the heat-and-moisture resistance of the infrared-absorbing transparent substrate is to expose the infrared-absorbing transparent substrate having a visible light transmittance of about 80% in a humid-heat atmosphere at a temperature of 85 ° C. and a relative humidity of 90% for 9 days.
- the change in solar transmittance before and after the exposure is determined to be 4.0% or less, and the heat and humidity resistance is judged to be good, and the change exceeds 4.0% It was judged that the heat and humidity resistance was insufficient.
- Cs / W (molar ratio) 0.33 hexagonal cesium tungsten bronze (Cs 0.33 WOz) powder (YM-01 manufactured by Sumitomo Metal Mining Co., Ltd., 2.0 ⁇ Z ⁇ 3.0) 25% by mass
- the mixed liquid obtained by mixing 75% by mass of pure water was loaded into a paint shaker containing 0.3 mm ⁇ ZrO 2 beads, and pulverized and dispersed for 10 hours.
- the particle refractive index was 1.81, and the particle shape was non-spherical.
- the background was measured using pure water, and the solvent refractive index was 1.33.
- the crystallite diameter of the Cs 0.33 WOz fine particles was measured and found to be 32 nm.
- the obtained dispersion of Cs 0.33 WOz fine particles and pure water were mixed to obtain a dispersion A for forming a coating film according to Example 1 in which the concentration of Cs 0.33 WOz fine particles was 2% by mass.
- a dispersion A for forming a coating film according to Example 1 in which the concentration of Cs 0.33 WOz fine particles was 2% by mass.
- 2.5% by mass of aluminum ethyl acetoacetate diisopropylate and 97.5% by mass of isopropyl alcohol (IPA) were mixed as an aluminum-based chelate compound to obtain surface treating agent a according to Example 1.
- the obtained dispersion A for coating film formation A890g was put into a beaker, and the surface treatment agent a360g was dripped here over 3 hours, stirring strongly with the stirrer with the blade
- the film thickness of the coating film of the surface-treated infrared absorbing fine particles according to Example 1 was measured using a transmission electron micrograph of 300,000 times shown in FIG. 2, it was found to be 2 nm (implementation) (The film thickness of the portion sandwiched between two parallel solid lines in which the lattice stripes (arrangement of atoms in the crystal) of the Cs 0.33 WOz fine particles according to Example 1 are not observed).
- Tetramethoxysilane and 3-glycidoxypropyltrimethoxysilane are silane alkoxide glass coating agents.
- the surface-treated infrared-absorbing fine particle dispersion according to Example 1 was applied onto a glass substrate having a thickness of 3 mm using a bar coater (IMC-700 manufactured by Imoto Seisakusho) to form a coating film.
- This coating film was heated at 150 ° C. for 30 minutes to form a coating layer, and an infrared-absorbing transparent substrate according to Example 1 was obtained. Moreover, it was 3 micrometers when the film thickness of the coating layer was measured.
- the optical properties of the infrared-absorbing transparent base material according to Example 1 were measured. As a result, the visible light transmittance was 79.7%, the solar radiation transmittance was 46.6%, and the haze was 0.4%.
- the obtained infrared-absorbing transparent substrate according to Example 1 was exposed to a humid heat atmosphere at a temperature of 85 ° C. and a relative humidity of 90% for 9 days, and the optical characteristics were measured. As a result, the visible light transmittance was 82.8% and the solar radiation was obtained. The transmittance was 50.5% and the haze was 0.4%. The change in visible light transmittance by exposure to a humid heat atmosphere was 3.1%, the change in solar radiation transmittance was 3.9%, both of which were small, and the haze was not changed.
- Table 1 shows the production conditions of the surface-treated infrared absorbing fine particle powder according to Example 1
- Table 2 shows the production conditions of the surface-treated infrared absorbing fine particle dispersion
- Table 3 shows the optical property evaluation results of the infrared-absorbing transparent base material.
- Example 2 and 3 Except that the amount of the surface treatment agent a and the addition time of the surface treatment agent are changed, the surface-treated infrared absorbing fine particle powder and the surface-treated infrared absorbing material according to Examples 2 and 3 are obtained by performing the same operations as in Example 1. A fine particle dispersion and an infrared absorbing transparent base material were obtained, and the same evaluation as in Example 1 was performed.
- Table 1 shows the manufacturing conditions of the surface-treated infrared absorbing fine particle powder according to Examples 2 and 3
- Table 2 shows the manufacturing conditions of the surface-treated infrared absorbing fine particle dispersion
- Table 3 shows the optical property evaluation results of the infrared absorbing transparent base material. Show.
- Example 4 The ripening liquid according to Example 1 was allowed to stand for 1 hour, and the surface-treated infrared absorbing fine particle powder and the medium were subjected to solid-liquid separation. Next, only the supernatant medium was removed to obtain an infrared absorbing fine particle slurry. The obtained infrared-absorbing fine particle slurry was dried at 80 ° C. for 3 hours in the air atmosphere, and the obtained powder was dry pulverized with a hammer mill to obtain the surface-treated infrared-absorbing fine particle powder according to Example 4.
- the surface according to Example 4 is the same as Example 1 except that the surface-treated infrared absorbing fine particle powder according to Example 4 is used instead of the surface-treated infrared absorbing fine particle powder according to Example 1.
- a treated infrared-absorbing fine particle dispersion and an infrared-absorbing transparent base material were obtained and evaluated in the same manner as in Example 1.
- Table 1 shows the manufacturing conditions of the surface-treated infrared absorbing fine particle powder according to Example 4
- Table 2 shows the manufacturing conditions of the surface-treated infrared absorbing fine particle dispersion
- Table 3 shows the optical property evaluation results of the infrared-absorbing transparent base material.
- Example 5 A surface treating agent b according to Example 5 was obtained by mixing 2.4% by mass of zirconium tributoxyacetylacetonate and 97.6% by mass of isopropyl alcohol. Except that the surface treatment agent b was used in place of the surface treatment agent a, the surface treatment infrared absorption fine particle powder, the surface treatment infrared absorption fine particle dispersion according to Example 5, An infrared absorbing transparent base material was obtained, and the same evaluation as in Example 1 was performed.
- Table 1 shows the production conditions of the surface-treated infrared absorbing fine particle powder according to Example 5
- Table 2 shows the production conditions of the surface-treated infrared absorbing fine particle dispersion
- Table 3 shows the optical property evaluation results of the infrared-absorbing transparent base material.
- Example 6 The surface treatment agent c according to Example 6 was prepared by mixing 2.6% by mass of diisopropoxytitanium bisethylacetoacetate and 97.4% by mass of isopropyl alcohol.
- a surface-treated infrared absorbing fine particle powder, a surface-treated infrared absorbing fine particle dispersion according to Example 6 is obtained by performing the same operation as in Example 1 except that the surface treating agent c is used instead of the surface treating agent a.
- An infrared absorbing transparent base material was obtained, and the same evaluation as in Example 1 was performed.
- Table 1 shows the production conditions of the surface-treated infrared absorbing fine particle powder according to Example 6,
- Table 2 shows the production conditions of the surface-treated infrared absorbing fine particle dispersion, and
- Table 3 shows the optical property evaluation results of the infrared-absorbing transparent base material.
- the mixture was loaded into a paint shaker containing beads and pulverized and dispersed for 10 hours to obtain a dispersion of Na 0.33 WOz fine particles according to Example 7.
- the dispersion particle diameter of Na 0.33 WOz fine particles in the obtained dispersion was measured and found to be 100 nm.
- the particle diameter measurement was set to a particle refractive index of 1.81 and a particle shape of aspherical.
- the background was measured using isopropyl alcohol, and the solvent refractive index was 1.38. Moreover, after removing the solvent of the obtained dispersion, the crystallite diameter of the Na 0.33 WOz fine particles according to Example 7 was measured and found to be 32 nm.
- a dispersion B for coating film formation in which a dispersion of Na 0.33 WOz fine particles according to Example 7 and isopropyl alcohol are mixed and the concentration of infrared absorbing fine particles (cubic sodium tungsten bronze fine particles) is 2% by mass is obtained. Obtained.
- the resulting coating film-forming dispersion B520 g was placed in a beaker, and the surface treatment agent a360 g described in Example 1 and pure water d100 g were mixed in parallel over 3 hours while stirring vigorously with a stirrer equipped with a blade. Added dropwise. After the dropwise addition, the mixture was stirred at a temperature of 20 ° C. for 24 hours to prepare an aging solution according to Example 7.
- the medium is evaporated from the ripened liquid using vacuum fluidized drying, the obtained dried product is heat-treated at 200 ° C. for 1 hour in a nitrogen gas atmosphere, and the obtained powder is dry-pulverized by a hammer mill.
- a surface-treated infrared absorbing fine particle powder according to Example 7 was obtained.
- Example 7 The surface treatment according to Example 7 was performed in the same manner as in Example 1 except that the surface-treated infrared absorbing fine particle powder according to Example 7 was used instead of the surface-treated infrared absorbing fine particle powder according to Example 1.
- An infrared-absorbing fine particle dispersion and an infrared-absorbing transparent substrate were obtained and evaluated in the same manner as in Example 1.
- Table 1 shows the production conditions of the surface-treated infrared absorbing fine particle powder according to Example 7
- Table 2 shows the production conditions of the surface-treated infrared absorbing fine particle dispersion
- Table 3 shows the optical property evaluation results of the infrared-absorbing transparent base material.
- the surface-treated infrared rays according to Examples 8 to 10 were obtained by performing the same operation as in Example 1 except that the coating film forming dispersions C to E were used instead of the coating film forming dispersion A.
- Absorbing fine particle powder, surface-treated infrared-absorbing fine particle dispersion, and infrared-absorbing transparent base material were obtained and evaluated in the same manner as in Example 1.
- Table 1 shows the production conditions of the surface-treated infrared absorbing fine particle powders according to Examples 8 to 10
- Table 2 shows the production conditions of the surface-treated infrared absorbing fine particle dispersion
- Table 3 shows the optical property evaluation results of the infrared-absorbing transparent base material. Show.
- Example 11 Instead of 16 g of tetramethoxysilane and 10 g of 3-glycidoxypropyltrimethoxysilane, 15 mol of low-temperature curing perhydropolysilazane (manufactured by AZ-Electronic Materials, trade name: Aquamica NP-110) was used, and 0.1 mol The surface treated infrared absorbing fine particle powder, the surface treated infrared absorbing fine particle dispersion, the infrared absorbing transparent group according to Example 11 are the same as in Example 1 except that 40 g / liter of nitric acid is not added. A material was obtained and evaluated in the same manner as in Example 1.
- Table 1 shows the manufacturing conditions of the surface-treated infrared absorbing fine particle powder according to Example 11
- Table 2 shows the manufacturing conditions of the surface-treated infrared absorbing fine particle dispersion
- Table 3 shows the optical property evaluation results of the infrared-absorbing transparent base material.
- the low temperature curing perhydropolysilazane is a glass coating agent.
- Example 12 309 g of tetraethoxysilane was used as the surface treatment agent d.
- Surface-treated infrared-absorbing fine particle powder according to Example 12 is the same as Example 1 except that surface-treating agent d is used instead of surface-treating agent diluent a and isopropyl alcohol is not added.
- the surface-treated infrared-absorbing fine particle dispersion and the infrared-absorbing transparent base material were obtained and evaluated in the same manner as in Example 1.
- Table 1 shows the manufacturing conditions of the surface-treated infrared absorbing fine particle powder according to Example 12
- Table 2 shows the manufacturing conditions of the surface-treated infrared absorbing fine particle dispersion
- Table 3 shows the optical property evaluation results of the infrared-absorbing transparent base material.
- Example 13 Zinc acetylacetonate 4.4 mass% and isopropyl alcohol 95.6 mass% were mixed and the surface treating agent dilution liquid e which concerns on Example 13 was obtained.
- the surface-treated infrared-absorbing fine particle powder according to Example 13 and the surface-treated infrared-absorbing powder were obtained in the same manner as in Example 1 except that the surface-treating agent diluted solution e was used instead of the surface-treating agent diluted solution a.
- a fine particle dispersion and an infrared absorbing transparent base material were obtained, and the same evaluation as in Example 1 was performed.
- Table 1 shows the production conditions of the surface-treated infrared-absorbing fine particle powder according to Example 13
- Table 2 shows the production conditions of the surface-treated infrared-absorbing fine particle dispersion
- Table 3 shows the optical property evaluation results of the infrared-absorbing transparent substrate.
- the surface-treated infrared-absorbing fine particle dispersion according to Comparative Example 1 was applied onto a 3 mm thick glass substrate with a bar coater (IMC-700 manufactured by Imoto Seisakusho) to form a coating film.
- This coating film was heated at 150 ° C. for 30 minutes to form a cured film, and an infrared-absorbing transparent substrate according to Comparative Example 1 was obtained. Moreover, it was 3 micrometers when the film thickness of the coating layer was measured.
- the optical properties of the obtained infrared-absorbing transparent substrate according to Comparative Example 1 were measured. As a result, the visible light transmittance was 79.3%, the solar radiation transmittance was 46.1%, and the haze was 0.5%.
- the obtained infrared-absorbing transparent substrate according to Comparative Example 1 was exposed to a humid heat atmosphere at a temperature of 85 ° C. and a relative humidity of 90% for 9 days, and the optical characteristics were measured. As a result, the visible light transmittance was 83.3%, and the solar radiation was transmitted. The rate was 52.5% and haze was 0.9%. The amount of change in the visible light transmittance due to exposure to a humid atmosphere was 4.0%, and the amount of change in the solar radiation transmittance was 6.4%, which was found to be large compared to the examples. Further, the rate of change in haze was 0.4%. Table 3 shows the optical property evaluation results of the infrared-absorbing transparent substrate according to Comparative Example 1.
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Abstract
Description
これらの提案を機能的観点から俯瞰してみる。すると、例えば、各種建築物や車両の窓材等の分野において、可視光線を十分に取り入れながら近赤外領域の光を遮蔽し、明るさを維持しつつ室内の温度上昇を抑制することを目的としたものがある。また、PDP(プラズマディスプレイパネル)から前方に放射される赤外線が、コードレスフォンや家電機器のリモコンに誤動作を引き起こしたり、伝送系光通信に悪影響を及ぼしたりすることを防止することを目的としたもの、等もある。
当該太陽光可変調光断熱材料へ太陽光が照射されると、光線中の紫外線が酸化タングステンに吸収されて励起電子とホールとが発生し、少量の紫外線量により5価タングステンの出現量が著しく増加して着色反応が速くなり、これに伴って着色濃度が高くなる。他方、光が遮断されることによって、前記5価タングステンが極めて速やかに6価に酸化されて消色反応が高くなる。当該着色/消色特性を用い、太陽光に対する着色および消色反応が速く、着色時に近赤外域の波長1250nmに吸収ピークが現れ、太陽光の近赤外線を遮断することが出来る太陽光可変調光断熱材料が得られることが提案されている。
尚、本発明において「コーティング層」とは、基材上に所定の膜厚をもって形成された室温で固体の媒質膜のことである。
また、本発明において「固体状樹脂」とは室温で固体の高分子媒質のことであり、三次元架橋したもの以外の高分子媒質も含む。また、本発明において室温で固体の高分子媒質を「樹脂」と記載する場合もある。
そして本発明者らは、当該表面処理赤外線吸収微粒子が分散しているコーティング層を有する赤外線吸収透明基材に想到した。さらに、当該表面処理赤外線吸収微粒子が所定の液体媒質中に分散している表面処理赤外線吸収微粒子分散液が、当該コーティング層を形成する為のコーティング液として好適であることにも想到して本発明を完成した。
液体媒質中に、表面処理赤外線吸収微粒子が分散している表面処理赤外線吸収微粒子分散液であって、
前記表面処理赤外線吸収微粒子は、当該微粒子の表面が、金属キレート化合物の加水分解生成物、金属キレート化合物の加水分解生成物の重合物、金属環状オリゴマー化合物の加水分解生成物、金属環状オリゴマー化合物の加水分解生成物の重合物、から選択される1種類以上を含む膜で被覆されている赤外線吸収微粒子であることを特徴とする表面処理赤外線吸収微粒子分散液である。
第2の発明は、
前記金属キレート化合物または前記金属環状オリゴマー化合物が、Al、Zr、Ti、Si、Znから選択される1種類以上の金属元素を含むことを特徴とする第1の発明に記載の表面処理赤外線吸収微粒子分散液である。
第3の発明は、
前記金属キレート化合物または前記金属環状オリゴマー化合物が、エーテル結合、エステル結合、アルコキシ基、アセチル基から選択される1種類以上を有することを特徴とする第1または第2の発明に記載の表面処理赤外線吸収微粒子分散液である。
第4の発明は、
前記赤外線吸収微粒子が、一般式WyOz(但し、Wはタングステン、Oは酸素、2.2≦z/y≦2.999)、または/および、一般式MxWyOz(但し、Mは、H、He、アルカリ金属、アルカリ土類金属、希土類元素、Mg、Zr、Cr、Mn、Fe、Ru、Co、Rh、Ir、Ni、Pd、Pt、Cu、Ag、Au、Zn、Cd、Al、Ga、In、Tl、Si、Ge、Sn、Pb、Sb、B、F、P、S、Se、Br、Te、Ti、Nb、V、Mo、Ta、Re、Be、Hf、Os、Bi、I、Ybのうちから選択される1種類以上の元素、Wはタングステン、Oは酸素、0.001≦x/y≦1、2.0≦z/y≦3.0)で表記される赤外線吸収微粒子であることを特徴とする第1から第3の発明のいずれかに記載の表面処理赤外線吸収微粒子分散液である。
第5の発明は、
前記Mが、Cs、K、Rb、Tl、In、Baのうちから選択される1種類以上の元素であることを特徴とする第4の発明に記載の表面処理赤外線吸収微粒子分散液である。
第6の発明は、
前記赤外線吸収微粒子が六方晶の結晶構造を有する、タングステン酸化物微粒子または/および複合タングステン酸化物微粒子であることを特徴とする第1から第5の発明のいずれかに記載の表面処理赤外線吸収微粒子分散液である。
第7の発明は、
前記表面処理赤外線吸収微粒子分散液が、さらにガラスコーティング剤を含んでいることを特徴とする第1から第6の発明のいずれかに記載の表面処理赤外線吸収微粒子分散液である。
第8の発明は、
前記液体媒質が、芳香族炭化水素類、ケトン類、エーテル類、アルコール類、水、から選択される1種類以上であり、
前記ガラスコーティング剤が、シランカップリング剤、シラン系アルコキシド、から選択される1種類以上であることを特徴とする第7の発明に記載の表面処理赤外線吸収微粒子分散液である。
第9の発明は、
前記液体媒質が、芳香族炭化水素類、ケトン類、エーテル類、から選択される1種類以上であり、
前記ガラスコーティング剤が、ポリシラザン、ポリオルガノシラン、から選択される1種類以上であることを特徴とする第7の発明に記載の表面処理赤外線吸収微粒子分散液である。
第10の発明は、
1枚以上の透明基材の少なくとも一方の面に、コーティング層を有する赤外線吸収透明基材であって、
前記コーティング層は、表面処理赤外線吸収微粒子を含み、
前記表面処理赤外線吸収微粒子は、当該微粒子の表面が、金属キレート化合物の加水分解生成物、金属キレート化合物の加水分解生成物の重合物、金属環状オリゴマー化合物の加水分解生成物、金属環状オリゴマー化合物の加水分解生成物の重合物、から選択される1種類以上を含む膜で被覆されている赤外線吸収微粒子であることを特徴とする赤外線吸収透明基材である。
第11の発明は、
前記金属キレート化合物または前記金属環状オリゴマー化合物が、Al、Zr、Ti、Si、Znから選択される1種類以上の金属元素を含むことを特徴とする第10の発明に記載の赤外線吸収透明基材である。
第12の発明は、
前記金属キレート化合物または前記金属環状オリゴマー化合物が、エーテル結合、エステル結合、アルコキシ基、アセチル基から選択される1種類以上を有することを特徴とする第10または第11の発明に記載の赤外線吸収透明基材である。
第13の発明は、
前記赤外線吸収微粒子が、一般式WyOz(但し、Wはタングステン、Oは酸素、2.2≦z/y≦2.999)、または/および、一般式MxWyOz(但し、Mは、H、He、アルカリ金属、アルカリ土類金属、希土類元素、Mg、Zr、Cr、Mn、Fe、Ru、Co、Rh、Ir、Ni、Pd、Pt、Cu、Ag、Au、Zn、Cd、Al、Ga、In、Tl、Si、Ge、Sn、Pb、Sb、B、F、P、S、Se、Br、Te、Ti、Nb、V、Mo、Ta、Re、Be、Hf、Os、Bi、I、Ybのうちから選択される1種類以上の元素、Wはタングステン、Oは酸素、0.001≦x/y≦1、2.0≦z/y≦3.0)で表記される赤外線吸収微粒子であることを特徴とする第10から第12の発明のいずれかに記載の赤外線吸収透明基材である。
第14の発明は、
前記Mが、Cs、K、Rb、Tl、In、Baのうちから選択される1種類以上の元素であることを特徴とする第13の発明に記載の赤外線吸収透明基材である。
第15の発明は、
前記赤外線吸収微粒子が六方晶の結晶構造を有する、タングステン酸化物微粒子または/および複合タングステン酸化物微粒子であることを特徴とする第10から第14の発明のいずれかに記載の赤外線吸収透明基材である。
第16の発明は、
前記コーティング層が、さらにガラスコーティング剤を含んでいることを特徴とする第10から第15の発明のいずれかに記載の赤外線吸収透明基材である。
第17の発明は、
前記ガラスコーティング剤が、シランカップリング剤、シラン系アルコキシド、ポリシラザン、ポリオルガノシラン、から選択される1種類以上であることを特徴とする第16の発明に記載の赤外線吸収透明基材である。
第18の発明は、
前記透明基材が、透明ガラス基材、透明樹脂基材、から選択される1種類以上であることを特徴とする第10から第17の発明のいずれかに記載の赤外線吸収透明基材である。
本発明に係る赤外線吸収透明基材、表面処理赤外線吸収微粒子分散液および表面処理赤外線吸収微粒子粉末に用いられる赤外線吸収微粒子は、一般式WyOz(但し、Wはタングステン、Oは酸素、2.2≦z/y≦2.999)、または/および、一般式MxWyOz(但し、Mは、H、He、アルカリ金属、アルカリ土類金属、希土類元素、Mg、Zr、Cr、Mn、Fe、Ru、Co、Rh、Ir、Ni、Pd、Pt、Cu、Ag、Au、Zn、Cd、Al、Ga、In、Tl、Si、Ge、Sn、Pb、Sb、B、F、P、S、Se、Br、Te、Ti、Nb、V、Mo、Ta、Re、Be、Hf、Os、Bi、I、Ybのうちから選択される1種類以上の元素、Wはタングステン、Oは酸素、0.001≦x/y≦1、2.0≦z/y≦3.0)で表記される赤外線吸収微粒子であることを特徴としている。
尚、本発明において「透明性」とは、「可視光領域の光に対して散乱が少なく透過性が高い。」という意味で用いている。
ここで、本発明に係る赤外線吸収微粒子であるタングステン酸化物微粒子または/および複合タングステン酸化物微粒子について、(1)タングステン酸化物微粒子、(2)複合タングステン酸化物微粒子、(3)赤外線吸収微粒子、の順で説明する。
本発明に係るタングステン酸化物微粒子は、一般式WyOz(但し、Wはタングステン、Oは酸素、2.2≦z/y≦2.999)で表記されるタングステン酸化物の微粒子である。
さらには、当該赤外線吸収微粒子をWyOzと記載したとき、2.2≦z/y≦2.999であることが好ましい。当該z/yの値が2.2以上であれば、当該タングステン酸化物中に目的以外であるWO2の結晶相が現れるのを回避することが出来ると伴に、材料としての化学的安定性を得ることが出来るので有効な赤外線吸収微粒子となる。一方、当該z/yの値が2.999以下であれば、必要とされる量の自由電子が生成され効率よい赤外線吸収微粒子となる。
上述した当該複合タングステン酸化物(WO3)へ、後述する元素Mを添加したものが複合タングステン酸化物である。そして、当該WO3に対し酸素量の制御と、自由電子を生成する元素Mの添加とを併用することで、より効率の良い赤外線吸収微粒子を得ることが出来る。当該構成をとることで、複合タングステン酸化物中に自由電子が生成され、特に近赤外線領域に自由電子由来の強い吸収特性が発現し、波長1000nm付近の近赤外線吸収微粒子として有効となる。
この酸素量の制御と、自由電子を生成する元素Mの添加とを併用した赤外線吸収微粒子の一般式をMxWyOz(但し、Mは、後述する元素M、Wはタングステン、Oは酸素)と記載したとき、0.001≦x/y≦1、2.2≦z/y≦3の関係を満たす赤外線吸収微粒子が望ましい。
図1において、符号11で示すWO6単位にて形成される8面体が6個集合して六角形の空隙が構成され、当該空隙中に、符号12で示す元素Mが配置して1箇の単位を構成し、この1箇の単位が多数集合して六方晶の結晶構造を構成する。
そして、可視光領域における光の透過を向上させ、赤外領域における光の吸収を向上させる効果を得る為には、複合タングステン酸化物微粒子中に、図1を用いて説明した単位構造が含まれていれば良く、当該複合タングステン酸化物微粒子が結晶質であっても非晶質であっても構わない。
この六角形の空隙に元素Mの陽イオンが添加されて存在するとき、可視光領域における光の透過が向上し、赤外領域における光の吸収が向上する。ここで一般的には、イオン半径の大きな元素Mを添加したとき当該六方晶が形成され易い。具体的には、Cs、K、Rb、Tl、In、Ba、Li、Ca、Sr、Fe、Snのうち1種類以上、より好ましくはCs、K、Rb、Tl、In、Baのうち1種類以上を添加したとき六方晶が形成され易い。典型的な例としてはCs0.33WOz、Cs0.03Rb0.30WOz、Rb0.33WOz、K0.33WOz、Ba0.33WOz(2.0≦z≦3.0)などを挙げることができる。勿論これら以外の元素でも、WO6単位で形成される六角形の空隙に上述した元素Mが存在すれば良く、上述の元素に限定される訳ではない。
本発明に係る赤外線吸収微粒子は、上述したタングステン酸化物微粒子および/または複合タングステン酸化物微粒子を含有する。そして本発明に係る赤外線吸収微粒子は、近赤外線領域、特に波長1000nm付近の光を大きく吸収するため、その透過色調は青色系から緑色系となる物が多い。
ここで、粒子径とは凝集していない個々の赤外線吸収微粒子がもつ径の平均値であり、後述する赤外線吸収透明基材、表面処理赤外線吸収微粒子分散液、表面処理赤外線吸収微粒子粉末に含まれる赤外線吸収微粒子の平均粒径である。尚、粒子径は、赤外線吸収微粒子の電子顕微鏡像から算出される。
一方、本発明に係る赤外線吸収微粒子の分散粒子径は、その使用目的によって各々選定することが出来る。そして、分散粒子径は、上述した粒子径とは異なり凝集体の粒径も含む概念である。
さらに分散粒子径が100nm以下になると、散乱光は非常に少なくなり好ましい。光の散乱を回避する観点からは、分散粒子径が小さい方が好ましく、分散粒子径が1nm以上あれば工業的な製造は容易である。
尚、赤外線吸収微粒子の分散粒子径は、動的光散乱法を原理とした大塚電子株式会社製ELS-8000等を用いて測定することが出来る。
また、優れた赤外線吸収特性を発揮させる観点から、赤外線吸収微粒子の結晶子径は1nm以上200nm以下であることが好ましく、より好ましくは1nm以上100nm以下、さらに好ましくは10nm以上70nm以下である。結晶子径の測定には、粉末X線回折法(θ―2θ法)によるX線回折パターンの測定と、リートベルト法による解析を用いる。X線回折パターンの測定には、例えばスペクトリス株式会社PANalytical製の粉末X線回折装置「X’Pert-PRO/MPD」などを用いて行うことが出来る。
本発明に係る赤外線吸収微粒子の表面被覆に用いる表面処理剤は、金属キレート化合物の加水分解生成物、金属キレート化合物の加水分解生成物の重合物、金属環状オリゴマー化合物の加水分解生成物、金属環状オリゴマー化合物の加水分解生成物の重合物、から選択される1種以上である。
そして、当該金属キレート化合物、金属環状オリゴマー化合物は、金属アルコキシド、金属アセチルアセトネート、金属カルボキシレートであることが好ましい観点から、エーテル結合、エステル結合、アルコキシ基、アセチル基から選択される1種以上を有することが好ましい。
ここで、本発明に係る赤外線吸収微粒子の表面処理剤について、(1)金属キレート化合物、(2)金属環状オリゴマー化合物、(3)金属キレート化合物や金属環状オリゴマー化合物の加水分解生成物、および、それらの重合物、(4)表面処理剤の添加量、の順で説明する。
本発明に用いる金属キレート化合物は、アルコキシ基を含有するAl系、Zr系、Ti系、Si系、Zn系のキレート化合物から選ばれる1種以上であることが好ましい。
これらの化合物は、アルミニウムアルコレートを非プロトン性溶媒や、石油系溶剤、炭化水素系溶剤、エステル系溶剤、ケトン系溶剤、エーテル系溶剤、アミド系溶剤等に溶解し、この溶液に、β-ジケトン、β-ケトエステル、一価または多価アルコール、脂肪酸等を加えて、加熱還流し、リガンドの置換反応により得られた、アルコキシ基含有のアルミニウムキレート化合物である。
また、4官能性シラン化合物の加水分解生成物(4官能性シラン化合物の加水分解生成物全体の意味である。)としては、アルコキシ基の一部あるいは全量が加水分解して、シラノール(Si-OH)基となったシランモノマー、4~5量体のオリゴマー、および、重量平均分子量(Mw)が800~8000程度の重合体(シリコーンレジン)が挙げられる。尚、アルコキシシランモノマー中のアルコキシシリル基(Si-OR)は、加水分解反応の過程において、その全てが加水分解してシラノール基(Si-OH)になるわけではない。
本発明に係る金属環状オリゴマー化合物としては、Al系、Zr系、Ti系、Si系、Zn系の環状オリゴマー化合物から選ばれる1種以上であることが好ましい。例えば、環状アルミニウムオキサイドオクチレート、環状アルミニウムオキサイドイソプロピレート、環状アルミニウムオキサイドステレートなどが挙げられる。
本発明では、上述した金属キレート化合物や金属環状オリゴマー化合物における、アルコキシ基、エーテル結合、エステル結合の全量が加水分解し、ヒドロキシル基やカルボキシル基となった加水分解生成物、一部が加水分解した部分加水分解生成物、または/および、当該加水分解反応を経て自己縮合した重合物を、本発明に係る赤外線吸収微粒子の表面に被覆して被覆膜とし、本発明に係る表面処理赤外線吸収微粒子を得るものである。
即ち、本発明における加水分解生成物は、部分加水分解生成物を含む概念である。
尚、本発明において、「赤外線吸収微粒子へ耐湿熱性を付与する為に、当該微粒子の表面へ、金属キレート化合物の加水分解生成物、金属キレート化合物の加水分解生成物の重合物、金属環状オリゴマー化合物の加水分解生成物、金属環状オリゴマー化合物の加水分解生成物の重合物、から選択される1種以上を用いて形成した被覆膜」を、単に「被覆膜」と記載する場合がある。
こうした事態を回避する為、前記被覆膜に未分解の金属キレート化合物または/および金属環状オリゴマー化合物が含有されている場合、後述の熱処理によってこれらの化合物の分解を進め、反応性の低い加水分解生成物の重合物になるまで反応させておくことが好ましい。
上述した金属キレート化合物や金属環状オリゴマー化合物の添加量は、赤外線吸収微粒子100重量部に対して、金属元素換算で0.05重量部以上1000重量部以下であることが好適である。より好ましくは5重量部以上500重量部以下、更により好ましくは50重量部以上250重量部以下の範囲である。
また、金属キレート化合物または金属環状オリゴマー化合物の添加量が1000重量部以下であれば、赤外線吸収微粒子に対する吸着量が過剰になることを回避出来る。また、表面被覆による耐湿熱性の向上が飽和せず、被覆効果の向上が望める。
さらに、金属キレート化合物または金属環状オリゴマー化合物の添加量が1000重量部以下であることで、赤外線吸収微粒子に対する吸着量が過剰になり、媒質除去時に当該金属キレート化合物または金属環状オリゴマー化合物の加水分解生成物や、当該加水分解生成物の重合物を介して微粒子同士が造粒し易くなることを回避出来るからである。当該微粒子同士による望まれない造粒の回避によって、良好な透明性を担保することが出来る。
加えて、金属キレート化合物または金属環状オリゴマー化合物の過剰による、添加量および処理時間の増加による生産コスト増加も回避出来る。よって工業的な観点からも金属キレート化合物や金属環状オリゴマー化合物の添加量は、1000重量部以下とすることが好ましい。
以上より、当該被覆膜の膜厚は0.5nm以上20nm以下であることがより好ましく、1nm以上10nm以下であればさらに好ましい。
尚、被覆膜の膜厚は、表面処理赤外線吸収微粒子の透過型電子顕微鏡像から測定することができる。例えば、図2に示す、実施例1に係る表面処理赤外線吸収微粒子の30万倍の透過型電子顕微鏡像において2本の平行する実線で挟まれた、赤外線吸収微粒子の格子縞(結晶中の原子の並び)が観察されない部分が被覆膜に相当する。
本発明に係る赤外線吸収微粒子の表面へ被覆を施し、表面処理赤外線吸収微粒子を製造するには、まず、赤外線吸収微粒子を水、または、水を含む有機溶媒中に分散させて被覆膜形成用の赤外線吸収微粒子分散液(本発明において「被覆膜形成用分散液」と記載する場合がある。)を調製する。
一方、「[2]赤外線吸収微粒子の表面処理剤」にて説明した表面処理剤を調製する。
そして被覆膜形成用分散液を混合攪拌しながら、ここへ表面処理剤を添加する。すると、赤外線吸収微粒子の表面が、金属キレート化合物の加水分解生成物、金属キレート化合物の加水分解生成物の重合物、金属環状オリゴマー化合物の加水分解生成物、金属環状オリゴマー化合物の加水分解生成物の重合物、から選択される1種以上を含む被覆膜で被覆されるものである。
そして、この粉砕、分散処理工程中において分散状態を担保し、微粒子同士を凝集させないことが肝要である。これは、次工程である赤外線吸収微粒子の表面処理の過程において、当該赤外線吸収微粒子が凝集を起こして凝集体の状態で表面被覆され、ひいては、後述する赤外線吸収微粒子分散体中においても当該凝集体が残存し、後述する赤外線吸収微粒子分散体や赤外線吸収基材の透明性が低下する事態を回避する為である。
本発明者らは、上述した被覆膜形成用分散液の調製において、水を媒質とする被覆膜形成用分散液を攪拌混合しながら、ここへ、本発明に係る表面処理剤を添加し、さらに、添加された金属キレート化合物、金属環状オリゴマー化合物の加水分解反応を即座に完了させるのが好ましいことを知見した。尚、赤外線吸収微粒子を均一に表面被覆する観点から、表面処理剤は滴下添加することが好ましい。
これは、添加した本発明に係る表面処理剤の反応順序が影響していると考えられる。即ち、水を媒質とする被覆膜形成用分散液中においては、表面処理剤の加水分解反応が必ず先立ち、その後に、生成した加水分解生成物の重合反応が起こる。この結果、水を媒質としない場合に比較して、被覆膜中に存在する表面処理剤分子内の炭素C残存量を低減することが出来るからであると考えられる。当該被覆膜中に存在する表面処理剤分子内の炭素C残存量を低減することで、個々の赤外線吸収微粒子の表面を高密度に被覆する被覆膜を形成することが出来たと考えている。
この表面処理剤の滴下添加の際、当該表面処理剤の時間当たりの添加量を調整する為に、表面処理剤自体を適宜な溶剤で希釈したものを滴下添加することも好ましい。希釈に用いる溶剤としては、当該表面処理剤と反応せず、被覆膜形成用分散液の媒質である水とも相溶性の高いものが好ましい。具体的にはアルコール系、ケトン系、グリコール系等の溶剤が好ましく使用出来る。
表面処理剤の希釈倍率は特に限定されるものではない。尤も、生産性を担保する観点から、希釈倍率は100倍以下とするのが好ましい。
一方、当該水を媒質とする被覆膜形成用分散液中において、本発明に係る赤外線吸収微粒子は静電反発によって分散を保っている。
その結果、全ての赤外線吸収微粒子の表面は、金属キレート化合物の加水分解生成物、金属キレート化合物の加水分解生成物の重合物、金属環状オリゴマー化合物の加水分解生成物、金属環状オリゴマー化合物の加水分解生成物の重合物、から選択される1種以上を含む被覆膜で被覆され、本発明に係る表面処理赤外線吸収微粒子が生成すると考えられる。
上述した水を媒質とする被覆膜形成用分散液を用いた赤外線吸収微粒子の表面被覆方法の変形例として、被覆膜形成用分散液の媒質として水を含む有機溶剤を用い、添加する水量を適宜な値に調整しながら上述した反応順序を実施する方法も好ましい。
当該調製方法は、後工程の都合により被覆膜形成用分散液中に含まれる水分量を低減したい場合に好適である。
具体的には、有機溶剤を媒質とする被覆膜形成用分散液を攪拌混合しながら、本発明に係る表面処理剤と純水とを並行滴下するものである。このとき、反応速度に影響する媒質温度や、表面処理剤と純水との滴下速度を適宜に制御する。尚、有機溶剤としては、アルコール系、ケトン系、グリコール系等、の室温で水に溶解する溶剤であれば良く、種々のものを選択することが可能である。
そして、当該「(2)」においても、表面処理剤の滴下添加の際、当該表面処理剤の時間当たりの添加量を調整する為に、表面処理剤自体を適宜な溶剤で希釈したものを滴下添加することが好ましい。この場合、希釈に用いる溶剤としては、当該表面処理剤と反応せず、被覆膜形成用分散液の媒質である水を含む有機溶剤と相溶性の高いものが好ましい。具体的にはアルコール系、ケトン系、グリコール系等の溶剤が好ましく使用出来る。
尚、表面処理剤として市販品の金属キレート化合物、金属環状オリゴマー化合物を用いる場合の対応や、表面処理剤の希釈倍率については、前記「(1)」と同様である。
本発明に係る表面処理赤外線吸収微粒子粉末は、被覆膜形成用分散液中の赤外線吸収微粒子を表面被覆した後に、適宜な乾燥処理により分散液(被覆膜形成用分散液、表面処理剤、水等の溶媒の混合物)中の溶媒を除去することで得られる。乾燥処理の設備としては、加熱および/または減圧が可能で、当該超微粒子の混合や回収がし易いという観点から、大気乾燥機、万能混合機、リボン式混合機、真空流動乾燥機、振動流動乾燥機、凍結乾燥機、リボコーン、ロータリーキルン、噴霧乾燥機、パルコン乾燥機、等が好ましいが、これらに限定されない。
尚、赤外線吸収微粒子が複合タングステン酸化物微粒子である場合、分散液中の溶媒が揮発するよりも高い温度であって、大気雰囲気中でも元素Mが脱離しない温度で乾燥処理することが望ましく、150℃以下であることが望ましい。
「[2]赤外線吸収微粒子の表面処理剤(4)項」で述べた通り、表面処理赤外線吸収微粒子や表面処理赤外線吸収微粒子粉末中の被覆膜に未分解の金属キレート化合物または/および金属環状オリゴマー化合物が含有されている場合、熱処理によって、当該キレート化合物または/およびオリゴマー化合物の分解を進めることが好ましい。
当該熱処理は大気雰囲気下、または、不活性ガス雰囲気下で行う。このとき、熱処理温度は、金属キレート化合物または/および金属環状オリゴマー化合物が分解する温度以上であって、赤外線吸収微粒子が結晶化し始める温度より低いことが好ましい。具体的には、赤外線吸収微粒子がタングステン酸化物微粒子または複合タングステン酸化物微粒子である場合、温度200℃以上500℃未満の温度範囲であることが好ましい。
尚、赤外線吸収微粒子が複合タングステン酸化物微粒子である場合、元素Mが脱離しないように熱処理することが望ましく、熱処理雰囲気は不活性ガス雰囲気下であることが望ましい。
この温度制御により赤外線吸収微粒子を粒成長させることなく、未分解の金属キレート化合物または/および金属環状オリゴマー化合物の分解を進め、本発明に係る表面処理赤外線吸収微粒子を得ることが出来る。
「[4]表面処理赤外線吸収微粒子粉末の製造方法」や「[5]表面処理赤外線吸収微粒子粉末の熱処理」にて説明した本発明に係る表面処理赤外線吸収微粒子粉末を用いて本発明に係る表面処理赤外線吸収微粒子分散液を得ることが出来る。
本発明に係る表面処理赤外線吸収微粒子分散液は、本発明に係る表面処理赤外線吸収微粒子が液体媒質中に分散しており、ガラスコーティング剤を含み、さらに所望により酸、分散剤、その他添加剤を含み、コーティング液として用いられるものである。当該液体媒質としては、有機溶媒、油脂、液状可塑剤、硬化により高分子化される化合物、水、から選択される1種以上の液体媒質を好ましく用いることが出来る。
以下、本発明に係る表面処理赤外線吸収微粒子分散液について、好ましく使用出来る(1)有機溶剤、(2)油脂、(3)液状可塑剤、(4)ガラスコーティング剤、(5)酸、(6)分散剤、(7)その他添加剤、そして、(8)表面処理赤外線吸収微粒子分散液の製造方法、の順に説明する。
本発明に係る表面処理赤外線吸収微粒子分散液に使用する有機溶媒としては、アルコール系、ケトン系、炭化水素系、グリコール系、水系、等を使用することが出来る。
具体的には、メタノール、エタノール、1-プロパノール、イソプロパノール、ブタノール、ペンタノール、ベンジルアルコール、ジアセトンアルコールなどのアルコール系溶剤;
アセトン、メチルエチルケトン、ジメチルケトン、メチルプロピルケトン、メチルイソブチルケトン、シクロヘキサノン、イソホロンなどのケトン系溶剤;
3-メチル-メトキシ-プロピオネート、酢酸n-ブチルなどのエステル系溶剤;
エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、エチレングリコールイソプロピルエーテル、プロピレングリコールモノメチルエーテル、プロピレングリコールモノエチルエーテル、プロピレングリコールメチルエーテルアセテート、プロピレングリコールエチルエーテルアセテートなどのグリコール誘導体;
フォルムアミド、N-メチルフォルムアミド、ジメチルホルムアミド、ジメチルアセトアミド、N-メチル-2-ピロリドンなどのアミド類;
トルエン、キシレンなどの芳香族炭化水素類;
エチレンクロライド、クロルベンゼン、等を使用することが出来る。
そして、これらの有機溶媒中でも、特に、ジメチルケトン、メチルエチルケトン、メチルイソブチルケトン、トルエン、プロピレングリコールモノメチルエーテルアセテート、酢酸n-ブチル、等を好ましく使用することが出来る。
本発明に係る表面処理赤外線吸収微粒子分散液に使用する油脂としては、植物油または植物油由来の化合物が好ましい。
植物油としては、アマニ油、ヒマワリ油、桐油、エノ油等の乾性油、ゴマ油、綿実油、菜種油、大豆油、米糠油、ケシ油等の半乾性油、オリーブ油、ヤシ油、パーム油、脱水ヒマシ油等の不乾性油、等を使用することが出来る。
植物油由来の化合物としては、植物油の脂肪酸とモノアルコールを直接エステル反応させた脂肪酸モノエステル、エーテル類、等を使用することが出来る。
また、市販の石油系溶剤も油脂として用いることが出来る。
市販の石油系溶剤として、(登録商標)アイソパーE、エクソールHexane、エクソールHeptane、エクソールE、エクソールD30、エクソールD40、エクソールD60、エクソールD80、エクソールD95、エクソールD110、エクソールD130(以上、エクソンモービル製)、等を使用することが出来る。
本発明に係る表面処理赤外線吸収微粒子分散液に添加する液状可塑剤としては、例えば、一価アルコールと有機酸エステルとの化合物である可塑剤、多価アルコール有機酸エステル化合物等のエステル系である可塑剤、有機リン酸系可塑剤等のリン酸系である可塑剤、等を使用することが出来る。尚、いずれも室温で液状であるものが好ましい。
なかでも、多価アルコールと脂肪酸から合成されたエステル化合物である可塑剤を好ましく使用することが出来る。当該多価アルコールと脂肪酸とから合成されたエステル化合物は特に限定されないが、例えば、トリエチレングリコール、テトラエチレングリコール、トリプロピレングリコール等のグリコールと、酪酸、イソ酪酸、カプロン酸、2-エチル酪酸、ヘプチル酸、n-オクチル酸、2-エチルヘキシル酸、ペラルゴン酸(n-ノニル酸)、デシル酸等の一塩基性有機酸との反応によって得られた、グリコール系エステル化合物、等を使用することが出来る。
また、テトラエチレングリコール、トリプロピレングリコールと、前記一塩基性有機とのエステル化合物等も使用することが出来る。
なかでも、トリエチレングリコールジヘキサネート、トリエチレングリコールジ-2-エチルブチレート、トリエチレングリコールジ-オクタネート、トリエチレングリコールジ-2-エチルヘキサノネート等のトリエチレングリコールの脂肪酸エステル、等を好ましく使用することが出来る。さらに、トリエチレングリコールの脂肪酸エステルも好ましく使用することが出来る。
本発明に係る表面処理赤外線吸収微粒子分散液にガラスコーティング剤を含有させることにより、本発明に係る赤外線吸収透明基材へ耐摩耗性を付与することが出来る。当該観点から、本発明に係る表面処理赤外線吸収微粒子分散液へ、さらにガラスコーティング剤を含有させることが好ましい。
上述したガラスコーティング剤に含まれる加水分解性ケイ素モノマー等の加水分解を促進させる観点から、本発明に係る表面処理赤外線吸収微粒子分散液へ酸を添加することも好ましい構成である。
本発明に係る表面処理赤外線吸収微粒子分散液に添加する酸としては、例えば、硝酸、塩酸、硫酸、トリクロロ酢酸、トリフルオロ酢酸、リン酸、メタンスルホン酸、パラトルエンスルホン酸、シュウ酸等を使用することが出来る。揮発性の酸は加熱時に揮発して硬化後の膜中に残存することがなく好ましい。
当該酸は、加水分解性ケイ素モノマーおよび当該ケイ素モノマーの加水分解縮合物の加水分解を促進させる触媒の役割を果たす。分散液における酸の添加量は、当該触媒の役割が果たせる範囲で特に限定なく設定出来るが、分散液全量に対して容量比で0.001~0.1mol/L程度とすることが好ましい。
本発明に係る表面処理赤外線吸収微粒子分散液において、表面処理赤外線吸収微粒子の分散安定性を一層向上させ、再凝集による分散粒子径の粗大化を回避する為に、各種の分散剤、界面活性剤、カップリング剤などを添加することも好ましい。
当該分散剤、カップリング剤、界面活性剤は用途に合わせて選定可能であるが、アミンを含有する基、水酸基、カルボキシル基、または、エポキシ基を官能基として有するものであることが好ましい。これらの官能基は、表面処理赤外線吸収微粒子の表面に吸着して凝集を防ぎ、均一に分散させる効果を持つ。これらの官能基のいずれかを分子中にもつ高分子系分散剤は、さらに好ましい。
ビックケミー・ジャパン株式会社製Disperbyk(登録商標)-101、103、107、108、109、110、111、112、116、130、140、142、145、154、161、162、163、164、165、166、167、168、170、171、174、180、181、182、183、184、185、190、2000、2001、2020、2025、2050、2070、2095、2150、2155、Anti-Terra(登録商標)-U、203、204、BYK(登録商標)-P104、P104S、220S、6919等;
エフカアディティブズ社製 EFKA(登録商標)-4008、4046、4047、4015、4020、4050、4055、4060、4080、4300、4330、4400、4401、4402、4403、4500、4510、4530、4550、4560、4585、4800、5220、6230、BASFジャパン株式会社社製JONCRYL(登録商標)-67、678、586、611、680、682、690、819、JDX5050等;
大塚化学株式会社製TERPLUS(登録商標) MD 1000、D 1180、D1330等;
味の素ファインテクノ株式会社製アジスパー(登録商標)PB-711、PB-821、PB-822、等を使用することが出来る。
本発明に係る表面処理赤外線吸収微粒子分散液には、塗布性やレベリング性、乾燥性の制御のために、各種界面活性剤や樹脂成分が、当該分散液の5質量%以下の範囲で少量含まれていても良い。界面活性剤としてはアニオン性、カチオン性、非イオン性、又は両性のものが挙げられる。
また、当該分散液を用いて得られる赤外線吸収透明基材の可撓性を付与するために、シリコーン樹脂、アクリル樹脂、ポリエステル樹脂、ポリウレタン樹脂、ポリオキシアルキレン基を含む親水性有機樹脂、エポキシ樹脂などの各種有機樹脂が当該分散液の5質量%以下の範囲で少量含まれていても良い。
また、得られる赤外線吸収透明基材へクラック防止性を付与するために、熱硬化性樹脂、熱可塑性樹脂、紫外線硬化性樹脂などが、当該分散液の20質量%以下の範囲で含まれていても良い。より具体的には、アクリル樹脂、エポキシ樹脂、ポリエステル樹脂、アミノ樹脂、ウレタン樹脂、フラン樹脂、シリコーン樹脂およびこれらの樹脂の変性品を挙げることが出来る。
本発明に係る表面処理赤外線吸収微粒子分散液を製造するには、本発明に係る表面処理赤外線吸収微粒子と、ガラスコーティング剤と、必要に応じて分散剤および/またはその他添加剤とを、共に前記液体媒質中に添加して分散させればよい。分散させる方法としては、「[3]赤外線吸収微粒子の表面被覆方法」で説明した粉砕・分散処理の具体的方法が挙げられる。ただし、過度に粉砕・分散処理を行い表面処理赤外線吸収微粒子中の1次粒子を粉砕すると、未被覆の新生面が現れて耐湿熱性が担保されなくなる恐れがある。よって、粉砕・分散処理は最低限の分散に留めることが好ましい。
尚、上述した「(5)酸」は、ガラスコーティング剤との過剰な反応を抑制する観点から、分散液製造の最終段階で添加することが好ましい。
本発明に係る赤外線吸収透明基材は、透明基材の少なくとも一方の面に本発明に係る表面処理赤外線吸収微粒子分散液をコーティング液として形成されたコーティング層を有するものである。前記コーティング層は、本発明に係る表面処理赤外線吸収微粒子が分散したガラスコーティング剤が、硬化したものである。
本発明に係る赤外線吸収透明基材は、耐湿熱性および化学安定性に優れ、且つ赤外線吸収材料として好適に利用出来るものである。
本発明に係る赤外線吸収透明基材について(1)赤外線吸収透明基材に用いる透明基材、(2)赤外線吸収透明基材の製造方法、(3)赤外線吸収透明基材の耐湿熱特性、(4)赤外線吸収透明基材上のコーティング層の膜厚測定の順に説明する。
透明基材としては透明ガラス基材、透明樹脂基材を用いることができ、必要とするボード、シート、フィルムの表面状態や耐久性に不具合を生じないものであれば特に制限はない。
透明ガラス基材の具体例としては、例えば、クリアガラス、グリーンガラス等の機能性ガラスが挙げられる。
透明樹脂基材の具体例としては、例えば、ポリエチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系ポリマー、ジアセチルセルロース、トリアセチルセルロース等のセルロース系ポリマー、ポリカーボネート系ポリマー、ポリメチルメタクリレート等のアクリル系ポリマー、ポリスチレン、アクリロニトリル・スチレン共重合体等のスチレン系ポリマー、ポリエチレン、ポリプロピレン、環状ないしノルボルネン構造を有するポリオレフィン、エチレン・プロピレン共重合体等のオレフィン系ポリマー、塩化ビニル系ポリマー、芳香族ポリアミド等のアミド系ポリマー、イミド系ポリマー、スルホン系ポリマー、ポリエーテルスルホン系ポリマー、ポリエーテルエーテルケトン系ポリマー、ポリフェニレンスルフィド系ポリマー、ビニルアルコール系ポリマー、塩化ビニリデン系ポリマー、ビニルブチラール系ポリマー、アリレート系ポリマー、ポリオキシメチレン系ポリマー、エポキシ系ポリマーや、さらにこれらの二元系、三元系各種共重合体、グラフト共重合体、ブレンド物等の透明ポリマーからなるボード、シート、およびフィルムが挙げられる。
本発明に係る表面処理赤外線吸収微粒子分散液を用い、透明基材上へ公知の方法でコーティング層を形成し、所定の方法で硬化させれば、本発明に係る表面処理赤外線微粒子が固体媒質に分散された赤外線吸収透明基材を製造することが出来る。硬化させる方法としては、乾燥処理、紫外線や電子線の照射、熱処理等により硬化させる方法が挙げられる。
本発明に係る赤外線吸収透明基材は、可視光透過率を80%前後に設定し、温度85℃相対湿度90%の湿熱雰囲気中に9日間暴露を行ったとき、当該暴露前後における日射透過率の変化量が4.0%以下であり、優れた耐湿熱性を有している。
本発明に係る赤外線吸収透明基材上のコーティング層の膜厚測定には、触針式表面粗さ計などを用いることが出来る。具体的には、所定の平滑な基材上に表面処理赤外線吸収微粒子分散液を塗布して塗布膜を得る。当該塗布膜が硬化する前に、当該塗布膜の一部を剃刀を用いて剥離させる。当該剥離させた硬化する前の塗布膜を、別の平滑な基材上に設置し、適宜な方法により硬化させてコーティング層を形成させた後、触針式表面粗さ計を用いて、基材とコーティング層との段差を測定して膜厚を得ることが出来る。
実施例および比較例における被覆膜形成用分散液や表面処理赤外線吸収微粒子分散液中の微粒子の分散粒子径は、動的光散乱法に基づく粒径測定装置(大塚電子株式会社製ELS-8000)により測定した平均値をもって示した。また、結晶子径は、粉末X線回折装置(スペクトリス株式会社PANalytical製X’Pert-PRO/MPD)を用いて粉末X線回折法(θ―2θ法)により測定し、リートベルト法を用いて算出した。
表面処理赤外線吸収微粒子の被覆膜の膜厚は、透過型電子顕微鏡(日立製作所株式会社社製 HF-2200)を用いて得た30万倍の写真データより、赤外線吸収微粒子の格子縞の観察されない部分を被覆膜として、当該被覆膜の膜厚を読み取った。
まず、厚さ3mmのガラス基材上に、所定のバーコーターを用いて表面処理赤外線吸収微粒子分散液を塗布して塗布膜とする。当該塗布膜が硬化する前に、当該塗布膜の一部を剃刀を用いて剥離させる。当該剥離させた硬化する前の塗布膜を別の平滑なガラス基材上に設置し、熱処理等の適宜な方法により硬化させてコーティング層を形成させ、赤外線吸収透明基材を得る。そして触針式表面粗さ計を用い、ガラス基材とコーティング層との段差を測定してコーティング層の膜厚を得る。
Cs/W(モル比)=0.33の六方晶セシウムタングステンブロンズ(Cs0.33WOz)粉末(住友金属鉱山株式会社製YM-01、2.0≦Z≦3.0)25質量%と純水75質量%とを混合して得られた混合液を、0.3mmφZrO2ビーズを入れたペイントシェーカーに装填し10時間粉砕・分散処理し、実施例1に係るCs0.33WOz微粒子の分散液を得た。得られた分散液中のCs0.33WOz微粒子の分散粒子径を測定したところ、100nmであった。尚、粒径測定の設定として、粒子屈折率は1.81、粒子形状は非球形とした。また、バックグラウンドは純水を用いて測定し、溶媒屈折率は1.33とした。さらに、得られた分散液の溶媒を除去した後、Cs0.33WOz微粒子の結晶子径を測定したところ32nmであった。
一方、アルミニウム系のキレート化合物としてアルミニウムエチルアセトアセテートジイソプロピレート2.5質量%と、イソプロピルアルコール(IPA)97.5質量%とを混合して、実施例1に係る表面処理剤aとした。
当該表面処理剤aの滴下添加後、さらに温度20℃で24時間の攪拌を行い、実施例1に係る熟成液を作製した。次いで、真空流動乾燥を用いて、当該熟成液から媒質を蒸発させ、得られた乾固物を窒素ガス雰囲気中において200℃で1時間熱処理し 、得られた粉状体をハンマーミルにより乾式粉砕して、実施例1に係る表面処理赤外線吸収微粒子粉末を得た。
ここで、実施例1に係る表面処理赤外線吸収微粒子の被覆膜の膜厚を、図2に示す30万倍の透過型電子顕微鏡写真を用いて測定したところ2nmであることが判明した(実施例1に係るCs0.33WOz微粒子の格子縞(結晶中の原子の並び)が観察されない、2本の平行する実線で挟まれた部分の膜厚)。
得られた表面処理赤外線吸収微粒子分散液の溶媒を除去した後、表面処理赤外線吸収微粒子の結晶子径を測定したところ28nmであった。
尚、テトラメトキシシランと3-グリシドキシプロピルトリメトキシシランとは、シラン系アルコキシドのガラスコーティング剤である。
実施例1に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
表面処理剤aの量と、その滴下添加時間とを変更したこと以外は、実施例1と同様の操作をすることで、実施例2および3に係る表面処理赤外線吸収微粒子粉末、表面処理赤外線吸収微粒子分散液、赤外線吸収透明基材を得て、実施例1と同様の評価を実施した。
実施例2、3に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
実施例1に係る熟成液を1時間静置して、表面処理赤外線吸収微粒子粉末と媒質とを固液分離させた。次いで、上澄みである媒質のみを除去して赤外線吸収微粒子スラリーを得た。得られた赤外線吸収微粒子スラリーを大気雰囲気中において80℃で3時間乾燥処理し、得られた粉状体をハンマーミルにより乾式粉砕して実施例4に係る表面処理赤外線吸収微粒子粉末を得た。
実施例4に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
ジルコニウムトリブトキシアセチルアセトネート2.4質量%とイソプロピルアルコール97.6質量%とを混合して実施例5に係る表面処理剤bとした。
表面処理剤aの代わりに表面処理剤bを用いたこと以外は、実施例1と同様の操作をすることで、実施例5に係る表面処理赤外線吸収微粒子粉末、表面処理赤外線吸収微粒子分散液、赤外線吸収透明基材を得て、実施例1と同様の評価を実施した。
実施例5に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
ジイソプロポキシチタンビスエチルアセトアセテート2.6質量%とイソプロピルアルコール97.4質量%とを混合して実施例6に係る表面処理剤cとした。
表面処理剤aの代わりに表面処理剤cを用いたこと以外は、実施例1と同様の操作をすることで、実施例6に係る表面処理赤外線吸収微粒子粉末、表面処理赤外線吸収微粒子分散液、赤外線吸収透明基材を得て、実施例1と同様の評価を実施した。
実施例6に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
Na/W(モル比)=0.33の立方晶ナトリウムタングステンブロンズ粉末(住友金属鉱山株式会社製)25質量%とイソプロピルアルコール75質量%とを混合し、得られた混合液を0.3mmφZrO2ビーズを入れたペイントシェーカーに装填して10時間粉砕・分散処理し、実施例7に係るNa0.33WOz微粒子の分散液を得た。得られた分散液中のNa0.33WOz微粒子の分散粒子径を測定したところ、100nmであった。尚、粒径測定の設定として、粒子屈折率は1.81とし、粒子形状は非球形とした。また、バックグラウンドはイソプロピルアルコールを用いて測定し、溶媒屈折率は1.38とした。また、得られた分散液の溶媒を除去したあと、実施例7に係るNa0.33WOz微粒子の結晶子径を測定したところ32nmであった。
実施例7に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
六方晶セシウムタングステンブロンズ粉末の代わりに、K/W(モル比)=0.33の六方晶カリウムタングステンブロンズ粉末(実施例8)、Rb/W(モル比)=0.33の六方晶ルビジウムタングステンブロンズ粉末(実施例9)、マグネリ相のW18O49(実施例10)、(以上、住友金属鉱山株式会社製)を用いた以外は、実施例1と同様にして赤外線吸収微粒子の分散粒子径および結晶子径を測定し、更に被覆膜形成用分散液C(実施例8)、D(実施例9)、E(実施例10)を得た。
被覆膜形成用分散液Aの代わりに被覆膜形成用分散液C~Eを用いたこと以外は、実施例1と同様の操作をすることで、実施例8~10に係る表面処理赤外線吸収微粒子粉末、表面処理赤外線吸収微粒子分散液、赤外線吸収透明基材を得て、実施例1と同様の評価を実施した。
実施例8~10に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
テトラメトキシシラン16gおよび3-グリシドキシプロピルトリメトキシシラン10gの代わりに、低温硬化型ペルヒドロポリシラザン(AZ-エレクトロニックマテリアルズ社製、商品名:アクアミカNP-110)15gを用い、0.1モル/リットルの硝酸40gを添加しなかったこと以外は、実施例1と同様の操作をすることで、実施例11に係る表面処理赤外線吸収微粒子粉末、表面処理赤外線吸収微粒子分散液、赤外線吸収透明基材を得て、実施例1と同様の評価を実施した。
実施例11に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
尚、低温硬化型ペルヒドロポリシラザンはガラスコーティング剤である。
テトラエトキシシラン309gを表面処理剤dとした。
表面処理剤希釈液aの代わりに表面処理剤dを用い、イソプロピルアルコールを添加しなかったこと以外は、実施例1と同様の操作をすることで、実施例12に係る表面処理赤外線吸収微粒子粉末、表面処理赤外線吸収微粒子分散液、赤外線吸収透明基材を得て、実施例1と同様の評価を実施した。
実施例12に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
亜鉛アセチルアセトナート4.4質量%とイソプロピルアルコール95.6質量%とを混合して実施例13に係る表面処理剤希釈液eを得た。
表面処理剤希釈液aの代わりに表面処理剤希釈液eを用いたこと以外は、実施例1と同様の操作をすることで、実施例13に係る表面処理赤外線吸収微粒子粉末、表面処理赤外線吸収微粒子分散液、赤外線吸収透明基材を得て、実施例1と同様の評価を実施した。
実施例13に係る表面処理赤外線吸収微粒子粉末の製造条件を表1に、表面処理赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
六方晶セシウムタングステンブロンズ粉末(住友金属鉱山株式会社製YM-01、2.0≦Z≦3.0)10gを、イソプロピルアルコール23g、テトラメトキシシラン16g、3-グリシドキシプロピルトリメトキシシラン10gと混合し、得られた混合液を、0.3mmφZrO2ビーズを入れたペイントシェーカーに装填して5時間粉砕・分散処理した。その後、0.1モル/リットルの硝酸40gを添加し、温度20℃で1時間攪拌し、比較例1に係る表面処理赤外線吸収微粒子分散液を得た。得られた表面処理赤外線吸収微粒子分散液の溶媒を除去したあと、六方晶セシウムタングステンブロンズ粒子の結晶子径を測定したところ28nmであった。
比較例1に係る赤外線吸収透明基材の光学特性評価結果を表3に示す。
六方晶セシウムタングステンブロンズ粉末の代わりに、Na/W(モル比)=0.33の立方晶ナトリウムタングステンブロンズ粉末(比較例2)や、K/W(モル比)=0.33の六方晶カリウムタングステンブロンズ粉末(比較例3)や、Rb/W(モル比)=0.33の六方晶ルビジウムタングステンブロンズ粉末(比較例4)や、マグネリ相のW18O49粉末(比較例5)(以上、住友金属鉱山株式会社製)を用いたこと以外は、比較例1と同様の操作をすることで、比較例2~5に係る赤外線吸収微粒子分散液、赤外線吸収透明基材を得て、実施例1と同様の評価を実施した。
比較例2~5に係る赤外線吸収透明基材の湿熱雰囲気暴露による可視光透過率の変化量、および日射透過率の変化量は実施例より大きかった。また、比較例2~5に係る赤外線吸収透明基材の湿熱雰囲気暴露によるヘイズの変化量も実施例より大きかった。
比較例2~5に係る赤外線吸収微粒子分散液の製造条件を表2に、赤外線吸収透明基材の光学特性評価結果を表3に示す。
12.元素M
Claims (18)
- 液体媒質中に、表面処理赤外線吸収微粒子が分散している表面処理赤外線吸収微粒子分散液であって、
前記表面処理赤外線吸収微粒子は、当該微粒子の表面が、金属キレート化合物の加水分解生成物、金属キレート化合物の加水分解生成物の重合物、金属環状オリゴマー化合物の加水分解生成物、金属環状オリゴマー化合物の加水分解生成物の重合物、から選択される1種類以上を含む膜で被覆されている赤外線吸収微粒子であることを特徴とする表面処理赤外線吸収微粒子分散液。 - 前記金属キレート化合物または前記金属環状オリゴマー化合物が、Al、Zr、Ti、Si、Znから選択される1種類以上の金属元素を含むことを特徴とする請求項1に記載の表面処理赤外線吸収微粒子分散液。
- 前記金属キレート化合物または前記金属環状オリゴマー化合物が、エーテル結合、エステル結合、アルコキシ基、アセチル基から選択される1種類以上を有することを特徴とする請求項1または2に記載の表面処理赤外線吸収微粒子分散液。
- 前記赤外線吸収微粒子が、一般式WyOz(但し、Wはタングステン、Oは酸素、2.2≦z/y≦2.999)、または/および、一般式MxWyOz(但し、Mは、H、He、アルカリ金属、アルカリ土類金属、希土類元素、Mg、Zr、Cr、Mn、Fe、Ru、Co、Rh、Ir、Ni、Pd、Pt、Cu、Ag、Au、Zn、Cd、Al、Ga、In、Tl、Si、Ge、Sn、Pb、Sb、B、F、P、S、Se、Br、Te、Ti、Nb、V、Mo、Ta、Re、Be、Hf、Os、Bi、I、Ybのうちから選択される1種類以上の元素、Wはタングステン、Oは酸素、0.001≦x/y≦1、2.0≦z/y≦3.0)で表記される赤外線吸収微粒子であることを特徴とする請求項1から3のいずれかに記載の表面処理赤外線吸収微粒子分散液。
- 前記Mが、Cs、K、Rb、Tl、In、Baのうちから選択される1種類以上の元素であることを特徴とする請求項4に記載の表面処理赤外線吸収微粒子分散液。
- 前記赤外線吸収微粒子が六方晶の結晶構造を有する、タングステン酸化物微粒子または/および複合タングステン酸化物微粒子であることを特徴とする請求項1から5のいずれかに記載の表面処理赤外線吸収微粒子分散液。
- 前記表面処理赤外線吸収微粒子分散液が、さらにガラスコーティング剤を含んでいることを特徴とする請求項1から6のいずれかに記載の表面処理赤外線吸収微粒子分散液。
- 前記液体媒質が、芳香族炭化水素類、ケトン類、エーテル類、アルコール類、水、から選択される1種類以上であり、
前記ガラスコーティング剤が、シランカップリング剤、シラン系アルコキシド、から選択される1種類以上であることを特徴とする請求項7に記載の表面処理赤外線吸収微粒子分散液。 - 前記液体媒質が、芳香族炭化水素類、ケトン類、エーテル類、から選択される1種類以上であり、
前記ガラスコーティング剤が、ポリシラザン、ポリオルガノシラン、から選択される1種類以上であることを特徴とする請求項7に記載の表面処理赤外線吸収微粒子分散液。 - 1枚以上の透明基材の少なくとも一方の面に、コーティング層を有する赤外線吸収透明基材であって、
前記コーティング層は、表面処理赤外線吸収微粒子を含み、
前記表面処理赤外線吸収微粒子は、当該微粒子の表面が、金属キレート化合物の加水分解生成物、金属キレート化合物の加水分解生成物の重合物、金属環状オリゴマー化合物の加水分解生成物、金属環状オリゴマー化合物の加水分解生成物の重合物、から選択される1種類以上を含む膜で被覆されている赤外線吸収微粒子であることを特徴とする赤外線吸収透明基材。 - 前記金属キレート化合物または前記金属環状オリゴマー化合物が、Al、Zr、Ti、Si、Znから選択される1種類以上の金属元素を含むことを特徴とする請求項10に記載の赤外線吸収透明基材。
- 前記金属キレート化合物または前記金属環状オリゴマー化合物が、エーテル結合、エステル結合、アルコキシ基、アセチル基から選択される1種類以上を有することを特徴とする請求項10または11に記載の赤外線吸収透明基材。
- 前記赤外線吸収微粒子が、一般式WyOz(但し、Wはタングステン、Oは酸素、2.2≦z/y≦2.999)、または/および、一般式MxWyOz(但し、Mは、H、He、アルカリ金属、アルカリ土類金属、希土類元素、Mg、Zr、Cr、Mn、Fe、Ru、Co、Rh、Ir、Ni、Pd、Pt、Cu、Ag、Au、Zn、Cd、Al、Ga、In、Tl、Si、Ge、Sn、Pb、Sb、B、F、P、S、Se、Br、Te、Ti、Nb、V、Mo、Ta、Re、Be、Hf、Os、Bi、I、Ybのうちから選択される1種類以上の元素、Wはタングステン、Oは酸素、0.001≦x/y≦1、2.0≦z/y≦3.0)で表記される赤外線吸収微粒子であることを特徴とする請求項10から12のいずれかに記載の赤外線吸収透明基材。
- 前記Mが、Cs、K、Rb、Tl、In、Baのうちから選択される1種類以上の元素であることを特徴とする請求項13に記載の赤外線吸収透明基材。
- 前記赤外線吸収微粒子が六方晶の結晶構造を有する、タングステン酸化物微粒子または/および複合タングステン酸化物微粒子であることを特徴とする請求項10から14のいずれかに記載の赤外線吸収透明基材。
- 前記コーティング層が、さらにガラスコーティング剤を含んでいることを特徴とする請求項10から15のいずれかに記載の赤外線吸収透明基材。
- 前記ガラスコーティング剤が、シランカップリング剤、シラン系アルコキシド、ポリシラザン、ポリオルガノシラン、から選択される1種類以上であることを特徴とする請求項16に記載の赤外線吸収透明基材。
- 前記透明基材が、透明ガラス基材、透明樹脂基材、から選択される1種類以上であることを特徴とする請求項10から17のいずれかに記載の赤外線吸収透明基材。
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2019
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WO2022181356A1 (ja) * | 2021-02-24 | 2022-09-01 | 株式会社 東芝 | 酸化タングステン粉末スラリーおよびその製造方法並びにそれを用いたエレクトロクロミック素子の製造方法 |
FR3137083A1 (fr) * | 2022-06-28 | 2023-12-29 | Ecole Polytechnique | Revêtement composite de contrôle solaire à base de nanocristaux de bronzes de tungstène dispersés dans une matrice sol-gel à base de silice |
WO2024003080A1 (fr) * | 2022-06-28 | 2024-01-04 | Ecole Polytechnique | Revêtement composite de contrôle solaire à base de nanocristaux de bronzes de tungstène dispersés dans une matrice sol-gel à base de silice |
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US11987520B2 (en) | 2024-05-21 |
TW201946876A (zh) | 2019-12-16 |
JP7342861B2 (ja) | 2023-09-12 |
EP3792326A4 (en) | 2022-02-02 |
BR112020022481A2 (pt) | 2021-02-09 |
US20210214273A1 (en) | 2021-07-15 |
AU2019267798B2 (en) | 2024-11-07 |
KR20210007943A (ko) | 2021-01-20 |
SG11202010372SA (en) | 2020-11-27 |
JPWO2019216152A1 (ja) | 2021-05-27 |
AU2019267798A1 (en) | 2020-11-19 |
PH12020551874A1 (en) | 2021-05-31 |
CN112074582A (zh) | 2020-12-11 |
EP3792326A1 (en) | 2021-03-17 |
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