MXPA99005165A - Coating material - Google Patents

Coating material

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Publication number
MXPA99005165A
MXPA99005165A MXPA/A/1999/005165A MX9905165A MXPA99005165A MX PA99005165 A MXPA99005165 A MX PA99005165A MX 9905165 A MX9905165 A MX 9905165A MX PA99005165 A MXPA99005165 A MX PA99005165A
Authority
MX
Mexico
Prior art keywords
coating material
group
particles
acrylate
range
Prior art date
Application number
MXPA/A/1999/005165A
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Spanish (es)
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MX9905165A (en
MX206829B (en
Inventor
Hugo Gerd
Original Assignee
Hugo Gerd Diplwirtsching (Fh) 86938 Schondorf De
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Publication date
Priority claimed from DE19650300A external-priority patent/DE19650300A1/en
Application filed by Hugo Gerd Diplwirtsching (Fh) 86938 Schondorf De filed Critical Hugo Gerd Diplwirtsching (Fh) 86938 Schondorf De
Publication of MX9905165A publication Critical patent/MX9905165A/en
Publication of MXPA99005165A publication Critical patent/MXPA99005165A/en
Publication of MX206829B publication Critical patent/MX206829B/en

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Abstract

The invention relates to a coating material comprising a binding agent with high transparency in the thermal infrared range;first, plate-shaped particles, which reflect in the wavelength range of thermal infrared, and/or first spherical particles which backscatter in the wavelength range of thermal infrared;and/or second spherical particles which, in the dry state, have and/or form a hollow space, and consist of a material which is transparent in the thermal infrared range;second particles which reflect and/or backscatter in the wavelength range of visible light from 0.35-0.7&mgr;m, and are transparent in the wavelength range of thermal infrared, and/or polymer pigments which are transparent in the thermal infrared range and which, in the dry state, have and/or form a hollow space;third spherical particles which are electrically conductive and have a low absorption in the thermal infrared range;other admixtures known per se, that are usually used for coating.

Description

COATING MATERIAL Description of the invention It may be desirable to save energy in houses and buildings if the coating materials on the outside and / or inside could absorb solar energy without emitting it again directly into the thermal infrared wavelength range.
Normally, the white coating materials used as wall paints have the following spectral properties: The reflection in the wavelength range of visible light from 0; 35 to 0.7 is greater than 80%. The absorption in the near infrared wavelength range of '0.7 to 2.5 μm increases by 10%' to 0.7 μm to approximately 50% to 2.5 μm. The emission in the thermal infrared wavelength range of 8 to 14 μm, typically falls on average by 90%.
REF .: 30449 However, since the solar radiation has its maximum energy approximately 1 μm, it might be desirable to achieve an absorption that is as high as possible with the coating material, starting from 0.7 μm, for example directly adjacent to the range of visible light. In this, the sun provides 7 times more energy in the short half wave of the near infrared as in the long half wave. In addition, it is desirable to not re-emit the energy absorbed in the thermal infrared wavelength range of 8 to 14 μm.
In the German patent DE-A 195 01 114, the coating materials which only partially re-emit the solar energy absorbed in e-1 long wavelength range of thermal radiation are described. However, the particles introduced here for the absorption of solar energy lead to a more or less strong darkening of the coating material in the visible range.
The absorbent coating materials, dark, which can capture most of the solar energy do not correspond to the aesthetic needs of the inhabitants of the house. Very clear, white or at least almost white coating materials are desired.
German Patent DE-A 195 01 114 discloses a coating material of this type, which can have a relatively bright or clear appearance but has a very low degree of effectiveness with respect to solar absorption.
In addition, it is desirable that the walls of the house in zones of temperate to cold climate have a degree of emission dependent on the angle, which allows less energy to be radiated "towards the cold sky, but which receives the thermal radiation of the predominantly hot floor. In contrast, in hot climatic zones it is desirable to select a degree of emission directed towards the sky, which is as large as possible, because the heat can be conducted towards the predominantly clear sky in desert regions, while the irradiation thermal of the hot surroundings is reflected. and / or first spherical particles that are backscattered (backscattering of Wed) in the wavelength range of the thermal infrared from 5 to 100 μm, but at least from 5 to 25 μm, and have a degree of transmission in this length range of wave of at least 20%, and are present as single crystals, where the average diameter d of the first spherical particles is determined by the formula d = 10 μm / 2.1 • '(nT? o - nB? o) / where n-rio = index of refraction of the first spherical particle, at the wavelength of 10 μm and nB? o = index of refraction of the binding agent at the wavelength of 10 μm and / or second spherical particles having and / or forming a hollow space in the dry state, which are comprised of a material having a degree of transmission in the thermal infrared range of 5 to 100 μm, but at least 5 to 25 μm, greater than 20%, preferably greater than 30% and backscattered and / or reflected in the thermal infrared wavelength range from 5 to 100 μm, but at least 5 to 25 μm, and whose average diameter is from 2 to 20 μm. c) the second particles that reflect and / or backscatter in the wavelength range of visible light from 0.35 to 0.7 μm and have a degree of transmission in the thermal infrared wavelength range of 5 to 100 μm, but at least from 5 to 25 μm, greater than 20%, preferably greater than 40%, and which are present as single crystals, wherein the average diameter d of the second particle is determined by the formula: d = 0.55 μm / 2.1 • (nt0.55 - nBo.5s), where nto.55 = index of refraction of the second particle, at the wavelength of 0.55 μm and nBo.55 = index of refraction of the binding agent at the wavelength of 0.55 μm and / or polymeric pigments having a degree of transmission in the thermal infrared range of 5 to 100 μm, but at least 8 to 14 μm, greater than 20%, preferably greater than 30%, and which have and / or they form a hollow space in the dry state, where the average diameter of the polymeric pigment particles is 0.2 to 2 μm, preferably 0.3 to 1 μm d) the third spherical particles, which are electrically conductive and have an absorption ba a in the thermal infrared range of 5 to 25 μm less than 80%, preferably less than 60%, and whose average diameter is 0.1 to 2 μm , preferably 0.2 to μm e) other known additives that are typically used in coatings, namely solvents such as water, aromatic solvents such as solvent naphtha, xylene, toluene, polar solvents such as alcohols and thickening agents, thixotropic agents, foam anti-foaming agents, dispersing agents for the given particles, additives for the reduction of the film-forming temperature such as glycols and benzene.
It should be understood that the average diameter or average particle size is the diameter for the particle size that reaches values in the respectively named ranges, and are present in a normal distribution around this value.
Advantageous embodiments of the subject matter of the invention are provided in the dependent claims.
An advantageous embodiment of the subject matter of the invention is characterized in that the binder agent is selected from: a) the group of aqueous dispersions and emulsions comprising dispersions and emulsions based on acrylic, styrene acrylate, polyethylene, polyethylene oxide, copolymers of ethylene-acrylic acid, methacrylate, copolymers of vinylpyrrolidone-vinyl acetate, polyvinylpyrrolidone, isopropyl acrylate , polyurethane and / or b) from the group of solvent-containing binding agents which comprise acrylic groups, cyclized rubber, butyl rubber, hydrocarbon resin, copolymers of α-methylstyrene-acrylonitrile, polyester imide, butyl esters of acrylic acid, ethers of polyacrylic acid, polyurethanes, aliphatic polyurethanes, chlorosulfonated polyethylene and / or c) from the group of thermoplastic materials such as polyolefins and polyvinyl compounds, especially polyethylene, polypropylene, Teflon and polyamide.
An advantageous embodiment of the subject matter of the invention is characterized in that the first plate-shaped particles consist of at least one material that is selected from: a) metal and / or 'selected metal alloys of aluminum, aluminum-bronze, antimony, chromium, iron, gold, iridium, copper, magnesium, molybdenum, nickel palladium, platinum, silver, tantalum, bismuth, tungsten, zinc, tin, brass, brass, nickel-brass, nickel-chrome alloy, nickel, constantan (40% nickel alloy and 60% copper), manganine and steel. b) and / or of materials, electrically non-conductive which are coated or covered with metal or Selected metal alloys of aluminum, aluminum-bronze, antimony, chromium, iron, gold, iridium, copper, magnesium, molybdenum, nickel, palladium, platinum, silver, tantalum, bismuth, tungsten, zinc, tin, bronze, brass, nickel- brass, nickel / chrome alloy, nickel, constantan, manganine, steel or tin oxide electrically conductive c) and / or the first plate-shaped particles are formed as laminated pigments which are constructed of at least three layers, wherein the layer • intermediate has a refractive index smaller than the outer layers, and whose materials are selected from the group of materials that have a transmission greater than 20%, preferably greater than 40%, ~ eñ ~ "the thermal infrared wavelength range of 5 to 25 μm comprising: (1) inorganic materials such as metal sulfides selected from zinc sulphide and lead sulphide, metal selenides such as zinc selenide, fluorides selected from calcium fluoride, lithium fluoride, barium fluoride and sodium fluoride,. antimonides such as indium antimonide, selected metal oxides 12 of zinc oxide, magnesium oxide, antimony oxide, barium titanate, barium ferrite, barium sulfate, calcium sulfate and mixed crystals of the aforementioned materials, and electrically conductive tin oxide (2) and / or organic materials selected from acrylate, styrene acrylate, polyethylene, polyethylene oxide, chlorosulfonated polyethylene, ethylene-acrylic acid copolymers, methacrylate, vinylpyrrolidone-vinyl acetate copolymers, polyvinylpyrrolidone, polyisopropyl acrylate, polyurethanes, rubber cyclized, butyl rubber, hydrocarbon resin, copolymers of tyne-acrylonitrile α-methyl, polyester imide, acrylic acid butyl esters, polyacrylic acid esters whose refractive index can be selectively increased by the addition of colloidal metal particles.
An additional advantageous embodiment of the subject matter of the invention is characterized in that the first spherical particles consist of at least one material selected from metal sulfides such as zinc sulphide and lead sulphide, metal selenides such as zinc selenide, fluorides such as calcium fluoride, lithium fluoride, barium fluoride and sodium fluoride, carbonates such as calcium carbonate or carbonate of magnesium, of antimonides such as anti-indium oniride, of metal oxides such as zinc oxide, magnesium oxide, antimony oxide, barium titanate, barium ferrite, calcium sulfate, barium sulfate and mixed crystals of the materials quoted, selected from mixed crystals of barium sulfate with zinc sulphide, such as Saptleben Chemie lithopones A further advantageous embodiment of the subject matter of the invention is characterized in that the material of the second spherical particles consists of at least one material which is selected from acrylate, styrene acrylate, acrylonitrile copolymer, polyethylene, polyethylene oxetate, chlorosulfonated polyethylene, 14 ethylene-acrylic acid copolymer, methacrylate, vinylpyrrolidone-vinyl acetate copolymer, vinylidene chloride copolymer, polyvinylpyrrolidone, polyisopropyl acrylate, polyurethane, cyclized rubber, butyl rubber, hydrocarbon resin, tireno-acrylonitrile a-methyl copolymer , polyester imide, acrylic acid butyl esters, polyacrylic acid esters.
A further advantageous embodiment of the subject matter of the invention is characterized in that the second particles consisting of at least one material that is selected from: metal sulfides such as zinc sulphide, and lead sulphide, metal selenides such as zinc selenide, fluorides selected from calcium fluoride, lithium fluoride, barium fluoride and sodium fluoride, carbonates such as carbonate calcium or magnesium carbonate, of antimonides such as indium antimonide of metal oxides such as zinc oxide, magnesium oxide, antimony oxide, barium titanate, barium ferrite, calcium sulfate, barium sulfate and mixed crystals of the aforementioned materials, such as mixed crystals of barium sulfate with zinc sulphide such as Saptleben Chemie lithopones.
A further advantageous embodiment of the subject matter of the invention is characterized in that the material of the second particles, which are present as the polymeric pigment, consist of at least one material that is selected from: acrylate, styrene acrylate, acrylonitrile copolymer, polyethylene, polyethylene oxide, chlorosulfonated polyethylene, ethylene-acrylic acid copolymer, methacrylate, vinylpyrrolidone-vinyl acetate copolymer, vinylidene chloride copolymer, polyvinylpyrrolidone, polyisopropyl acrylate,. polyur-ethane, cyclized rubber, - butyl rubber, hydrocarbon resin, copolymer of tyne-acrylonitrile α-methyl, polyester imide, esters 16 acrylic acid butyl esters, polyacrylic acid esters.
A further advantageous embodiment of the subject matter of the invention is characterized in that the third spherical particles are electrically conductive particles that are clear or transparent in the visible range, which consist of at least one material that is selected from: a) the group of metals such as aluminum, antimony, chromium, iron, gold, iridium, copper, magnesium, molybdenum, nickel, palladium, platinum, silver, tantalum, bismuth, tungsten, zinc and tin b) and / or from the group of metal alloys such as brass, brass, nickel-brass, nickel / chrome, nickel, constantan, manganine and steel and / or from the group of electrically conductive polymers such as polypyrrole or polyaniline, the diameter of which is 0.1 to 1.2 times the average wavelength of 0.55 μm of visible light, and is 17 preferably smaller than the average wavelength of visible light. d) and / or the group of electrically conductive coated pigments such as from the group of silicates such as talc, kaolin, mica, feldspar, wollastonite, silicon dioxide from the group of metal oxides such as titanium dioxide or barium sulfate, which are coated with tin oxide doped with antimony or doped with fluorine and / or from the group of pigments that are produced by doping with known doping agents such as alkali metal, ammonium or alkaline earth metal fluorides as well as tin (II) fluoride, hydrogen fluoride and antimonium oxide (I II) ) as well as electrically conductive tin oxide f) and / or the group of conductive carbon blacks whose diameter '' falls by 0.1 '' to 1.2 'times the average wavelength of visible light of 0.55 μm, and 18 is preferably smaller than the average wavelength of visible light, g) and / or group of mineral materials with natural electrical conductivity, such as zinc blende.
A further advantageous embodiment of the subject matter of the invention is characterized in that at least one additional filler is added which is transparent in the wavelength range of visible light and has a low refractive index, less than 2.5, preferably lower of 2.0, in the thermal infrared wavelength range of 5 to 10 μm, but at least in the wavelength range of 5 to 25 μm and has a low absorption of less than 80%, preferably less than 60%, in this wavelength range, and whose average particle size is from 0.3 to 30 μm, preferably from 0.5 to 20 μm.
A further advantageous embodiment of the subject matter of the invention is characterized in that at least one additional filler is selected from the group consisting of inorganic fillers such as a filler. such as calcium carbonate, calcium sulfate, calcium fluoride, magnesium carbonate and / or the group of organic fillers such as acrylate, acrylonitrile copolymers, vinylidene chloride copolymers, styrene acrylate, polyethylene, polyethylene oxide, chlorosulfonated polyethylenes , copolymers of ethylene-acrylic acid, methacrylate, copolymers of vinylpyrrolidone-vinyl acetate, polyvinylpyrrolidone, polyisopropyl acrylate, polyurethanes, or cyclized rubber, butyl rubber, hydrocarbon resin, copolymers of a-methyl-urea-acrylonitrile, imide of polyester, butyl esters of acrylic acid, esters of polyacrylic acid.
A further advantageous embodiment of the subject matter of the invention is characterized in that at least one additional filler is present in the form of hollow microspheres and has an average diameter of 20 to 250 μm, preferably of 40 to 120 μm.
A further advantageous embodiment of the subject of interest of the invention is characterized in that it uses at least one type of pigment for painting, for dyeing in the visible range, which has a high transmission, greater than 40%, preferably greater than 60%, in the thermal infrared wavelength range of 5 to 25 μm , and has a high absorption greater than 30%, preferably greater than 50%, in the complete solar spectrum of 0.4 to 2.5 μm, which is selected from the group of inorganic pigments for painting, especially metal oxides such as iron oxide, chromium oxides, but also tris (hexacyanoferrates (II)) of the formula Fe4 (Fe (CN) 6] 3 such as blue iron mannox from Degussa and the group of organic pigments for paints such as the Black S0084 from Paliogel (trademark commercial) of BASF from the group of perylenes.
A further advantageous embodiment of the subject matter of the invention is characterized in that the first plate-shaped particles are of the type which are alignable by an electric field or a magnetic field and cause a degree of emission dependent on the angle of the complete array . twenty-one A further advantageous embodiment of the subject matter of the invention is characterized in that metals and materials that react on the surface are protected by fatty acids, by chromization or phosphatization.
A further advantageous embodiment of the subject matter of the invention is characterized in that the first particles are in the form of a plate of material. electrically non-conductive, they are made of plastic or mineral mica.
A further advantageous embodiment of the subject matter of the invention is characterized in that a coating material with one of the previous characteristics is used, wherein the coating material must contain the first particles in the form of a plate and because the electric field and / or the magnetic field is applied during and / or after the application of the coating material to a carrier.
The subject matter of the invention is more closely described in the following by means of the Examples. 22 Example 1 280 g of water 4 g of thickening agent Tylose MH 2000 BASF 300 g of polymeric pigment emulsion Clothes OP-62 Rohm and Haas 180 g of dispersion of styrene-acrylate Mowilith DM 611 Hoechst 120 g of polyethylene oxidate Poligen E1 BASF 3 g of anti-foaming agent Byk 023 3 g of pigment dispersant N BASF 70 g of electrically conductive pigment Sacon P401 Sachtleben 650 g of Sachtolith L Sachtleben 40 g of water 70 g of aluminum flakes Reflexal 100 Eckart 5 g Dowanol TPM Dow Chemicals After dispersion in a mixer, the materials were spread on a commercial card for color test with which the firmness and opacity of the color can also be tested, and esp-e'ctraímente-measured later, of the drying.
The results were as follows 23 The reflection in the light range from 0.35 to 0.7 μm was 78%. The absorption in the near infrared range from 0.7 to 2.5 μm was on average 40%. The emission in the thermal radiation range from 8 to 14 μm was on average 54%. The broadband measurement of the coating with a thermo-battery from 6 to more than 100 μm resulted in an emission degree of 51%. The visual impression was white. Despite the high degree of whiteness, the solar absorption in the near infrared interval was very good. Only 51% of the solar energy obtained in this way was lost by the emission.
Example 2 280 g of water 4 g of thickening agent Tylose MH 2000 BASF 300 g of polymeric pigment emulsion Clothing OP-62 Rohm and Haas 180 g of styrene-acrylate dispersion Mowilith DM 611 Hoechst 80 g acrylate dispersion Mowilith DM 771 Hoeschst 24 40 g of wax emulsion W-842 N Keim-Additec 3 g of anti-foaming agent Byk 023 3 g of pigment dispersant N BASF 50 g of stabilized, ultra-fine brass pigment, particle size 1 μm Eckart 300 g of Sachtolith L Sachtleben 40 g of water 350 g of resin sealant GR Heubach 110 g of stainless steel flakes SS Fine Water Grade Novamet USA 5 g Dowanol TPM Dow Chemicals After dispersion in a mixer, the materials were spread on a commercial card for color test, with which firmness and opacity can also be tested, and was spectrally measured after drying.
The results were as follows The reflection in the light range from 0.35 to 0.7 μm was 75%. The absion in the near infrared range from 0.7 to 2.5 μm was on average 46%.
The emission in the range of thermal radiation from 8 to 14 μm was on average 52%. The broadband measurement of the coating with a thermo-battery from 6 to more than 100 μm resulted in an emission level of 49%. 3 320 g of water 6 g of thickening agent Tylose MH 2000 BASF 200 g of polymeric pigment emulsion Clothes OP-62 Rohm and Haas 160 g of styrene-acrylate dispersion Acronal 290D BASF 120 g acrylate dispersion Mowilith DM 771 Hoechst 3 g defoaming agent Byk 023 3 g pigment dispersant N BASF 60 g stabilized silver pigment, micronized, particle size less than 1 μm 3 g conductive carbon black, micronized, particle size less than 0.4 μm 300 g of coarse white pigment of zinc sulphide, particle size of 4 to 5 μm, Sachtleben 50 g of Sachtolith L Sachtleben 26 g of Dowanol TPM Dow Chemicals After dispersion in a mixer, the materials were spread on a commercial card for color test, with which firmness and opacity can also be tested, and was spectrally measured after drying.
The results were as follows: The reflection in the light range from 0.35 to 0.7 μm was 82%. The absion in the near infrared range from 0.7 to 2.5 μm was on average 38%. The emission in the thermal radiation range of 8 to 14 μm was on average 55%. The broadband measurement of the coating with a thermo-battery from 6 to more than 100 μm resulted in an emission degree of 59%.
Example 4 280 g of water. ' '' 4 g thickening agent Tylose MH 20Ó0'BASF 27 300 g of polymeric pigment emulsion Ropague 0P- 62 Rohm and Haas 120 g of acrylate styrene-acrylate dispersion 290D BASF 180 g acrylate dispersion HG-54K Rohm and Hass 3 g of anti-foaming agent by Byk 023 3 g of pigment dispersant N BASF 90 g of zinc blende, micronized, d50 = 1.5 μm Metallgesell schaft 500 g of Sachtolith L 40 g of water 200 g of resin sealant GR Heubach 150 g of stainless steel flakes SS Fine Water Grade Novamet USA 5 g Dowanol TPM Dow Chemicals After dispersion in a mixer, the materials were spread on / a commercial card for color test, with which firmness and opacity can also be tested, and spectrally measured after drying. The results were as follows: The reflection in the light range from 0.35 to 0.7 μm was 73%. 28 The absion in the near infrared range from 0.7 to 2.5 μm was on average 47%. The emission in the thermal radiation range from 8 to 14 μm was on average 55%. The broadband measurement of the coating with a thermo-battery from 6 to more than 100 μm resulted in an emission degree of 59%.
Example 5 320 g of Alpex Hoechst 64 g of Novares LA 300 Rütger VFT AG (35 g of solvent naphtha 180/210 65 g of Sachtolith HD-S Sachtleben 11 g of Tego Conduct UF Goldscmidt 50 g of zinc flakes Nova et USA After dispersion in a mixer, the materials were spread on a commercial card for color test, with which firmness and opacity can also be tested, and spectrally measured after drying.
The results were like. follow 29 The reflection in the light range from 0.35 to 0.7 μm was 70%. The absorption in the near infrared range from 0.7 to 2.5 μm was on average 43%. The emission in the thermal radiation range from 8 to 14 μm was on average 49%. The broadband measurement of the coating with a thermo-battery from 6 to more than 100 μm resulted in an emission degree of 47%.
Example 6 320 g of water 6 g of thickening agent Tylose MH 2000 BASF 100 g of polymeric pigment emulsion Clothes OP-62 Rohm and Haas 160 g of styrene-acrylate dispersion Acronal 290D BASF 120 g acrylate dispersion Mowilith DM 771 Hoechst 3 g defoaming agent Byk 023 3 g dispersant. pigment N BASF 0.5 g conductive carbon black, micronized, particle size less than 0.4 μm 3 g Black Paliogen S0084 from BASF 30 300 g of coarse white pigment of zinc sulphide, particle size of 5-9 μm, Sac tleben 100 g of crystalline calcium carbonate, O and 5 g of Dowanol TPM Dow Chemicals After dispersion in a mixer, the materials were spread on a commercial card for color test, with which firmness and opacity can also be tested, and was spectrally measured after drying.
The results were as follows: The reflection in the light range from 0.35 to 0.7 μm was 70%. The absorption in the near infrared range from 0.7 to 2.5 μm was on average 42%. The emission in the thermal radiation range from 8 to 14 μm was on average 54%. The broadband measurement of the > coating with a thermo-battery from 6 to more than 100 μm, resulted in an emission rating of 57%. 31 Example 7 320 g of water 6 g of thickening agent Tylose MH 2000 BASF 100 g of polymeric pigment emulsion Clothes OP-62 Rohm and Haas 160 g of styrene-acrylate dispersion Acronal 290D BASF 120 g acrylate dispersion Mowilith DM 771 Hoechst 3 g defoaming agent Byk 023 3 g pigment dispersant N BASF 1.5 g conductive carbon black, micronized, particle size less than 0.4 μm 200 g thick white pigment of zinc sulphide, size. of particle 5-9 μm, Sachtleben 50 g of calcium carbonate, crystalline, Omya 4 g of hollow polyethylene microefers, bulk density 0.03-0.9 g / cm3 5 g of Dowanol TPM Dow Chemicals After dispersion in a 'mixer,' the materials' were scattered over a card - commercial for color test, with -which can 32 firmness and opacity were also tested, and it was measured spectrally after drying.
The results were as follows: The reflection in the light range from 0.35 to 0.7 μm was 78%. The absorption in the near infrared range from 0.7 to 2.5 μm was on average 38%. The emission in the range of thermal radiation from 8 to 14 μm was on average 52%. The wideband measurement of the coating with a thermo-battery from 6 to more than 100 μm resulted in an emission degree of 57%.
The density of the paint could be reduced by 25% by the use of hollow microspheres.
Example 8 320 g of water 6 g of thickening agent Tylose MH 2000 BASF 100 ~~ g of "" emulsion, of polymeric pigment Clothes OP- 62 Roíi and Haas. 33 160 g of acrylate styrene-acrylate dispersion 290D BASF 120 g of "" dispersion of acrylate Mowilith DM 771 Hoechst 3 g of anti-foaming agent Byk 023 3 g of pigment dispersant N BASF 1 g of conductive carbon black, micronized, particle size less than 0.4 μm 3 g of Black Paliogen S0084 of BASF 2 g of blue iron Mannox, Degussa 200 g of coarse white pigment of zinc sulphide, particle size 5-9 μm, Sachtleben 50 g of calcium carbonate, crystalline, Omya 2 g of hollow microspheres Expancel, bulk density 0.3 - 0.8 g / cm3 5 g of Dowanol TPM Dow Chemicals After dispersion in a mixer, the materials were spread on a commercial card for color test, with which firmness and opacity can also be tested, and was spectrally measured after drying.
The results were as follows 34 The reflection in the light range from 0.35 to 0.7 μm was 62%. The absorption in the near infrared range from 0.7 to 2.5 μm was on average 44%. The emission in the thermal radiation range from 8 to 14 μm was on average 58%. The broadband measurement of the coating with a thermo-battery from 6 to more than 100 μm resulted in an emission degree of 60%.
The density of the paint could be reduced by 25% by the use of hollow microspheres. 9 320 g of water 6 g of thickening agent Tylose MH 2000 BASF 100 g of polymeric pigment emulsion Clothes OP-62 Rohm and Haas 160 g of styrene-acrylate dispersion Acronal 290D BASF 120 g acrylate dispersion Mowilith DM 771 Hoechst 3 g defoaming agent Byk 023 3 g pigment dispersant N BASF 35 1. 5 g conductive carbon black, micronized, particle size less than 0.4 μm 1.5 g red iron oxide Bayferrox 720 N Bayer 200 g of coarse white pigment of zinc sulfide, particle size of 5-9 μm, Sachtleben 50 g of calcium carbonate, crystalline, Omya 3 g of hollow polyethylene microspheres, bulk density 0.05-1.3 g / cm3 5 g of Dowanol TPM Dow Chemicals After dispersion in a mixer, the materials were spread on a commercial card for color test, with which firmness and opacity can also be tested, and was spectrally measured after drying.
The results were as follows The reflection in the light range from 0.35 to 0.7 μm was 64%. The absorption in the near infrared range from 0.7 to 2.5 μm was on average 47%. The emission in the range of thermal radiation from 8 to 14 μm was on average 55%. The 'broadband measurement of the coating with a thermo-battery 37 Self-adhesive coated in this manner had an emission degree, dependent on the angle, in the thermal infrared range, as well as a darker or lighter shade depending on the direction of observation.
The reflection in the visible light range from 0.35 to 0.7 was 35% in the angular range from 0o to 45 °, and 78% from 45 ° to 180 °. The emission in the thermal radiation range from 8 to 14 μm was 90% in the angular range from 0 to 45 ° and 58% from 45 ° to 180 °. The broadband measurement of the coating with a thermo-battery from 6 to more than 100 μm, resulted in an emission degree of 90% in the angular range from 0 ° to 45 °, and an emission degree of 56% from 45 ° up to 180 °.
Example 11 280 g of water 4 g of thickening agent Tylose MH 2000 BASF 300 g of emulsion of. polymeric pigment Ropague. OP- 62 'Rohm and Haas- _ 120 g of styrene-acrylate dispersion Acronal 290D BASF 1.5 g of conductive carbon black, micronized, particle size less than 0.4 μm 1.5 g of red iron oxide Bayferrox 720 N Bayer 200 g of coarse white pigment of zinc sulfide, particle size of 5-9 μm, Sachtleben 50 g of calcium carbonate, crystalline, Omya 3 g of hollow polyethylene microspheres, bulk density 0.05-1.3 g / cm3 5 g of Dowanol TPM Dow Chemicals After dispersion in a mixer, the materials were spread on a commercial card for color test, with which firmness and opacity can also be tested, and was spectrally measured after drying.
The results were as follows The reflection in the light range from 0.35 to 0.7 μm was 64%. The absorption in the near infrared range from 0.7 to 2.5 μm was on average 47%. The emission in the range of thermal radiation from 8 to 14 μm was on average 55%. Broadband measurement of the coating with a texmo battery from 6 to more than 100 μm resulted in an emission degree of 58%.
The density of the paint could be reduced by 20% by the use of hollow polyethylene microspheres.
Example 10 500 g of Desmoderm A Bayer Finishing 50 g of Desmoderm Z Bayer additive 10 g of electrically conductive pigment Sacon P401 Sachtleben 50 g calcium carbonate, crystalline, Omya 50 g Sachtolith HD-S Sachtleben 150 g stainless steel flakes SS Novamet USA After the dispersion in a mixer the materials were coated by knife on a self-adhesive film. In the wet state, the stainless steel flakes in the binder were aligned with a large-area electromagnet, in such a way that they took an angle of 45 degrees to the surface standards. After drying the coa, the self-adhesive film coated in this way had an emission degree, dependent on the angle, in the thermal infrared range, as well as a darker or lighter shade depending on the direction of observation.
The reflection in the visible light range from 0.35 to 0.7 was 35% in the angular range from 0o to 45 °, and 78% from 45 ° to 180 °. The emission in the thermal radiation range from 8 to 14 μm was 90% in the angular range from 0 ° to 45 ° and 58% from 45 ° to 180 °. The broadband measurement of the coa with a thermo-battery from 6 to more than 100 μm; resulted in an emission degree of 90% in the angular range from 0 ° to 45 °, and an emission degree of 56% from 45 ° to 180 °.
Example 11 - 280 g of water 4 g of thickening agent Tylose MH 2000 BASF 300 g of emulsion of. polymeric pigment Ropague. OP- 62 'Rohm and Ha s •' '"120 g dispersion-styrene-acrylate Acronal 290D BASF 180 g acrylate dispersion HG-54K Rohm and Haas 3 g antifoam agent Byk 023 3 g pigment dispersant N BASF 50 g of electrically conductive pigment, Sacon P401 Sachtleben 500 g of Sachtolith L 40 g of water 200 g of Harzsiegel GR Heubach 5 g of Dowanol TPM Dow Chemicals 100 g of aluminum lentils Dragon 20/90, treated superficially The materials were mixed without the aluminum lentils and applied with a paint roller to a vertical wall. The Dragon aluminum lentils were introduced with an artificial velvet apparatus into the wet coa material, in such a way that it assumed an angle of 45 ° oriented downward to the standard surface of the vertical wall. After drying the coa, the wall coated in this way had an emission degree dependent on the angle, in the thermal infrared range. The wall covered in this way had a lower degree of emission towards the sky than towards the floor.
The emission in the thermal radiation range from 8 to 14 μm was 92% in the angular range of 0 '45 °, and 56% from 45 ° to 180 ° The broadband measurement of the coa with a thermo-battery from 6 to more than 100 μm, resulted in an emission degree of 92% in the angular range of 0 to 45 °, and an emission degree of 55% from 45 ° to 180 °.
Comparative Example The following mixture was based on a formulation cited in the German patent DE-A 195 01 114: 200 g of polyethylene dispersion Poligen PE of BASF 200 g dispersion polyethylene (oxidate) Poligen BASF WE1 40 g acrylate dispersion Mowilith DM 771 Hoechst 2 g defoaming agent Byk 023 30 g Collacral VL as a thickener 240 g water "• •. '400 g sealer. silver lithopone from Sachtleben GmbH 80 g aluminum flakes Aquasil BP 2750 from Silberline After dispersion in a mixer, the materials were spread on a commercial card for color test, with which firmness and opacity can also be tested, and was spectrally measured after drying.
The results were as follows: The reflection in the light range from 0.35 to 0.7 μm was 67%. The absorption in the near infrared range from 0.7 to 2.5 μm was on average 29%. The emission in the range of thermal radiation from 8 to 14 μm was on average 71%. The broadband measurement of the coa with a thermo-battery from 6 to more than 100 μm resulted in an emission level of 68%.
The visual impression was too gray, corresponding to the low reflection in the visible range. The solar absorption in the near infrared range is 29% less than in the coating material according to the invention, and the emission in the thermal radiation range is smaller than the customary coating materials, but still too high.
Summary of Measurement Results It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (16)

CLAIMS Having described the invention as above, the content of the following claims is claimed as property:
1. A "coating material", characterized in that it comprises: a) a binder with high transparency of at least 30%, preferably greater than 50%, in the visible light range of 0.35 to 0.7 μm and with at least 20%, preferably greater than 40%, in the thermal infrared range from 5 to 100 μm, at least 5 to 15 μm, b) first plate-like particles reflecting in the thermal infrared wavelength range of 5 to 100 μm, but at least 5 to 25 μm, and whose dimensions are LXBXT, L = 5 -100 μm, B ' = 5 - 100 μm and T = 0.1 - 5 μm, preferably L = --- 30 - 60 μm, B = 30 - 60 μm and T = 0.5 - 1.5 μm, where 'L ~ length B = width. and T = thickness. and / or first spherical particles that are backscattered (backscattering of Wed) in the wavelength range of the thermal infrared from 5 to 100 μm, but at least from 5 to 25 μm, and have a degree of transmission in this length range wave of at least 20%, and are present as oncrystals, where the average diameter d of the first spherical particles is determined by the formula d = 10 μm / 2.1 • (nT? o - nB? 0), where nT? o_ = index of refraction of the first spherical particle, at the wavelength of 10 μm and nB? o = Index. de_ refraction of the binding agent at the wavelength of 10 μm and / or second spherical particles having and / or forming a hollow space in the dry state, which are comprised of a material having a degree of transmission in the thermal infrared range of 5 to 100 μm, but at least 5 to 10 μm. up to 25 μm, greater than 20%, preferably greater than 30% and retrodispe.rsan and / or reflect in the thermal infrared wavelength range from 5 to 100 μm, but at least 5 to 25 μm, and whose average diameter is 2 to 20 μm. c) second particles that reflect and / or backscatter in the wavelength range of visible light from 0.35 to 0.7 μm and have a degree of transmission in the thermal infrared wavelength range of 5 to 10 μm, but at less from 5 to 25 μm, greater than 20%, preferably greater than 40%, and which are present as monochromes, where the average diameter d of the second particle is determined by the formula: d = 0.55 μm / 2.1 • (nTo.55 - nB0.5s) f where nTo.55 = index of refraction of the second particle, at the wavelength of 0.55 μm and nBo.5s = refractive index of the binding agent at the wavelength of 0.55 μm and / or polymeric pigments having a degree of transmission in the thermal infrared range from 5 to 10.0 μm, but at least from 8 to 14 μm, greater than 20%, preferably greater than 30%, and which have and / or form a hollow space in the dry state, wherein the average diameter of the polymeric pigment particles is 0.2 to 2 μm, preferably 0.3 to 1 μm d) third spherical particles, which are electrically conductive and have a low absorption in the thermal infrared range of 5 to 25 μm less than 80%, preferably less than 60%, and whose average diameter is 0.1 to 2 μm, preferably 0.2 to μm e) other known additives which are typically used in coatings, namely solvents such as water, aromatic solvents such as solvent naphtha, xylene, toluene, polar solvents such as alcohols and thickening agents, ixotropic agents, foam anti-foaming agents, dispersing agents for the given particles, additives for the reduction of the film-forming temperature such as glycols and benzene.
2. The coating material. according to claim 1, characterized in that the binding agent is selected from: a) el. group of aqueous dispersions and emulsions comprising dispersions and emulsions based on acrylate, styrene acrylate, polyethylene, polyethylene oxide, copolymers of ethylene-acrylic acid, methacrylate, copolymers of vinylpyrrolidone-vinyl acetate, polyvinylpyrrolidone, isopropyl acrylate, polyurethane and /or b) of the group of solvent-containing binder agents which comprise acrylic groups, cyclized rubber, butyl rubber, hydrocarbon resin, copolymers of α-methylstyrene-acrylonitrile, polyester imide, acrylic acid butyl esters, polyacrylic acid ethers, polyurethanes, aliphatic polyurethanes, chlorosulfonated polyethylene and / or c) from the group of thermoplastic materials such as polyolefins and polyvinyl compounds, especially polyethylene, polypropylene, Teflon and polyamide.
3. The coating material according to claim 1, characterized in that the first plate-shaped particles consist of at least one material that is selected from a) metal and / or metal alloys selected from aluminum, aluminum-bronze, antimony, chromium, iron, gold, iridium, copper, magnesium, molybdenum, nickel palladium, platinum, silver, tantalum, bismuth, tungsten, zinc, tin, bronze , brass, nickel-brass, nickel-chrome alloy, nickel, constantan (40% nickel alloy and 60% copper), manganine and steel. b) and / or of electrically non-conductive materials which are coated or covered with selected metal or metal alloys of aluminum, aluminum-bronze, antimony, chromium, iron, gold, iridium, copper, magnesium, molybdenum, nickel, palladium, platinum , silver, tantalum, bismuth, tungsten, zinc, tin, bronze, brass, nickel-brass, nickel / chrome alloy, nickel, constantan, manganine, steel or electrically conductive tin oxide c) and / or the first particles in the form Plates are formed as laminated pigments which are constructed of at least three layers, wherein the intermediate layer has a refractive index smaller than the outer layers, and whose materials are selected from the group of materials having a transmission greater than 20. %, preferably greater than 40%, in the thermal infrared wavelength range of 5 to 25 μm comprising: (1) inorganic materials such as metal sulfides selected from zinc sulphide and lead sulfide, metal selenides such as zinc selenide, fluorides selected from calcium fluoride, lithium fluoride, barium fluoride and sodium fluoride, antimonides such as antimony of indium, metal oxides selected from zinc oxide, magnesium oxide, antimony oxide, barium titanate, barium ferrite, barium sulfate, calcium sulfate and mixed crystals of the aforementioned materials, and electrically conductive tin oxide (2) and / or organic materials selected from acrylate, styrene acrylate, polyethylene, polyethylene oxide, chlorosul phonated polyethylene, ethylene-acrylic acid copolymers, methacrylate, vinylpyrrolidone-vinyl acetate copolymers, polyvinylpyrrolidone, polyisopropyl acrylate, polyurethanes, cyclic rubber, butyl rubber, hydrocarbon resin, copolymers of α-methylstyrene-acrylonitrile, polyester imide, butyl esters of acrylic acid, polyacrylic acid esters whose refractive index can be selectively increased by the addition of colloidal metal particles.
J 4. The coating material according to claim 1, characterized in that the first spherical particles consist of at least one material that is selected from: metal sulphides such as zinc sulphide and lead sulphide, metal selenides such as zinc selenide, fluorides such as calcium fluoride, lithium fluoride, barium fluoride and sodium fluoride, carbonates such as calcium carbonate or magnesium carbonate, antimonides such as indium antimonide, metal oxides such as zinc oxide, magnesium oxide, antimony oxide, barium titanate, barium ferrite, calcium sulfate, barium sulfate and mixed crystals of the materials cited, selected from mixed crystals of barium sulphate with zinc sulphide, such as Saptleben Chemie lithopones
5. The coating material according to claim 1, characterized in that the material of the second spherical particles consists of at least one material that is selected from: acrylate, styrene acrylate, acrylonitrile copolymer, polyethylene, polyethylene oxide, chlorosulfonated polyethylene, ethylene-acrylic acid copolymer, methacrylate, vinylpyrrolidone-vinyl acetate copolymer, vinylidene chloride copolymer, polyvinylpyrrolidone, polyisopropyl acrylate, polyurethane, cyclized rubber, • butyl rubber, hydrocarbon resin, α-methylstyrene-acrylonitrile copolymer, polyester imide, acrylic acid butyl esters, polyacrylic acid esters.
6. The coating material according to claim 1, characterized in that the second particles consist of at least one material that is selected from: metal sulfides such as zinc sulphide, and lead sulfide, of metal selenides such as zinc selenide, of fluorides "selected from calcium fluoride, lithium fluoride, barium fluoride and sodium fluoride, carbonates such as calcium carbonate or magnesium carbonate, of antimonides such as indium antimonide of metal oxides such as zinc oxide, magnesium oxide, antimony oxide, barium titanate, barium ferrite, calcium sulfate, barium sulfate and mixed crystals of the materials mentioned, such as mixed crystals of barium sulfate with zinc sulphide such as the lithopones of 'S'achtleben Chemie ..
7. The coating material according to claim 1, characterized in that the material of the second particles, which are present as a polymeric pigment, consist of at least one material that is selected from: acrylate, styrene acrylate, acrylonitrile copolymer, polyethylene, polyethylene oxide, chlorosulfonated polyethylene, ethylene-acrylic acid copolymer, methacrylate, vinylpyrrolidone-vinyl acetate copolymer, vinylidene chloride copolymer, polyvinylpyrrolidone, polyisopropyl acrylate, polyurethane, cyclized rubber, butyl rubber, hydrocarbon resin, α-methylstyrene-acrylonitrile copolymer, polyester imide, acrylic acid butyl esters, polyacrylic acid esters.
8. The coating material according to claim 1, characterized in that the third spherical particles are electrically conductive particles that are clear or transparent in the visible range, consisting of at least one material that is selected from: a) the group of metals such as aluminum, antimony, chromium, iron, gold, iridium, copper, magnesium, molybdenum, nickel, palladium, platinum, silver, tantalum, bismuth, tungsten, zinc and tin b) and / or from the group of metal alloys such as brass, brass, nickel-brass, nickel / chrome, nickel, constantan, manganine and steel c) and / or of the group of electrically conductive polymers such as polypyrrole or polyaniline, whose diameter is 0.1 to 1.2 times the average wavelength of 0.55 μm of visible light, and is preferably smaller than the average wavelength of the visible light. d) and / or the group of electrically conductive coated pigments such as the group of silicates such as talc, kaolin, mica, feldspar, wollastonite, silicon dioxide from the group of metal oxides such as titanium dioxide or barium sulfate. , which are coated with tin oxide doped with antimony or doped with fluorine e) and / or of the group of pigments which are produced by doping with known doping agents such as alkali metal, ammonium or alkaline earth metal fluorides as well as tin (II) fluoride, hydrogen fluoride and antimony oxide (III) ) as well as electrically conductive tin oxide f) and / or the "group of conductive carbon blacks whose diameter falls by 0.1 to 1.2 times the average wavelength of visible light of 0.55 μm, and is preferably smaller than the average wavelength of visible light, g) and / or group of mineral materials with natural electrical conductivity, such as zinc blende.
9. The reclosing material according to claim 1, characterized in that at least one additional filler is added which is transparent in the wavelength range of visible light and has a low refractive index, less than 2.5, preferably less than 2.0, in the thermal infrared wavelength range of 5 to 100 μm, but at least in the wavelength range of 5 to 25 μm and has a low absorption of less than 80%, preferably less than 60%, in this wavelength range, and whose average particle size is from 0.3 to 30 μm, preferably 0.5 to 20 μm.
10. The coating material according to claim 9, characterized in that at least one additional filler is selected from the group consisting of inorganic fillers such as calcium carbonate, calcium sulfate, calcium fluoride, magnesium carbonate and / or group of organic fillers such as acrylate, acrylonitrile copolymers, vinylidene chloride copolymers, styrene acrylate, polyethylene, polyethylene oxide, chlorosulfonated polyethylenes, ethylene-acrylic acid copolymers, methacrylate, vinylpyrrolidone-vinyl acetate copolymers, polyvinylpyrrolidone, acrylate polyisopropyl, polyurethanes, or cyclized rubber, butyl rubber, hydrocarbon resin, α-methylstyrene-acrylonitrile copolymers, polyester imide, acrylic acid butyl esters, polyacrylic acid esters.
11. The coating material according to claim 9 or 10, characterized in that at least one additional filler is present in the form of hollow microspheres and has an average diameter of 20 to 250 μm, preferably 40 to 120 μm.
12. The coating material according to claim 1, characterized in that at least one type of pigment is used for painting, for dyeing in the visible range, which has a high transmission, greater than 40%, preferably greater than 60%, in the thermal infrared wavelength range of 5 to 25 μm, and has a high absorption greater than 30%, preferably greater than 50%, in the entire solar spectrum of 0.4 to 2.5 μm, which is selected from the group of pigments inorganic for painting, especially metal oxides such as iron oxide, chromium oxides, but also tris (hexacyanoferrates (II)) of the formula Fe (Fe (CN) 6] 3 such as blue iron mannox from Degussa and from the group of organic pigments for paints such as the Black S0084 of Paliogel (trade mark) of BASF of the group of the perylenes.
13. The coating material according to claim 1, characterized in that the first plate-shaped particles are of the type that are alignable by an electric field or a magnetic field and cause a degree of emission dependent on the angle of the complete array.
14. The coating material according to claim 1, 3 or 8, characterized in that the metals and materials that react superficially are protected by fatty acids, by chromization or phosphatization.
15. The coating material according to claim 1 or 3, characterized in that the first plate-shaped particles of electrically non-conductive material are plastic or mineral mica.
16. A method for applying a coating material, characterized in that a coating material is used according to any of the previous claims, wherein the coating material must contain the first particles in the form of a plate and because the electric field and / or the Magnetic field is applied during and / or after the application of the coating material to a carrier.
MX9905165A 1996-12-04 1997-12-03 COATING MATERIAL MX206829B (en)

Applications Claiming Priority (3)

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DE19650300.0 1996-12-04
DE19650300A DE19650300A1 (en) 1996-12-04 1996-12-04 Paint
PCT/DE1997/002831 WO1998024852A1 (en) 1996-12-04 1997-12-03 Coating material

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