WO2006054227A2 - Revetement pour lampes et lampe au moins partiellement recouverte de ce revetement - Google Patents

Revetement pour lampes et lampe au moins partiellement recouverte de ce revetement Download PDF

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Publication number
WO2006054227A2
WO2006054227A2 PCT/IB2005/053741 IB2005053741W WO2006054227A2 WO 2006054227 A2 WO2006054227 A2 WO 2006054227A2 IB 2005053741 W IB2005053741 W IB 2005053741W WO 2006054227 A2 WO2006054227 A2 WO 2006054227A2
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WIPO (PCT)
Prior art keywords
coating
coating according
lamp
network
group
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2005/053741
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English (en)
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WO2006054227A3 (fr
Inventor
Maarten De Leuw
Anna L. Bouwkamp-Wijnoltz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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Publication of WO2006054227A2 publication Critical patent/WO2006054227A2/fr
Publication of WO2006054227A3 publication Critical patent/WO2006054227A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
    • 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
    • C03C17/001—General methods for coating; Devices therefor
    • C03C17/003—General methods for coating; Devices therefor for hollow ware, e.g. containers
    • C03C17/005—Coating the outside
    • 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
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/005—Methods for coating the surface of the envelope
    • 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
    • C03C2203/00—Production processes
    • C03C2203/20—Wet processes, e.g. sol-gel process
    • C03C2203/22—Wet processes, e.g. sol-gel process using colloidal silica sols
    • 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
    • C03C2203/00—Production processes
    • C03C2203/20—Wet processes, e.g. sol-gel process
    • C03C2203/26—Wet processes, e.g. sol-gel process using alkoxides
    • 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
    • C03C2217/445—Organic continuous phases
    • 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
    • C03C2217/47—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
    • C03C2217/478—Silica
    • 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
    • C03C2217/485—Pigments
    • 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
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/11—Deposition methods from solutions or suspensions
    • C03C2218/113—Deposition methods from solutions or suspensions by sol-gel processes

Definitions

  • the invention relates to a coating for lamps, comprising a network obtainable by conversion of an organically modified silane by means of a sol-gel process, wherein silica particles obtainable from a stabilized colloidal silica dispersion are substantially incorporated in said network.
  • the invention also relates to a lamp comprising a vessel or a bulb, wherein said vessel or said bulb is at least partly provided with such a coating.
  • the invention further relates to an electronic device comprising at least one such lamp.
  • the improved known coating comprises a network obtainable by conversion of an organically modified silane by means of a sol-gel process, resulting in an improved adhesion to a vessel of the low-pressure mercury vapor discharge lamp at higher temperatures compared with the familiar prior art coatings based on organic lacquers.
  • the critical layer thickness of the known coating is less than 4 microns.
  • the solution is proposed to add a stabilizing agent to the network obtainable by conversion of an organically modified silane by means of a sol-gel process in order to prevent shrinking and slumping of the coating layer.
  • the stabilising agent comprises sodium- or ammonium-stabilized silica nanoparticles in water, in particular an aqueous silica sol, for example marketed under the trade name Ludox ® TM50 (obtainable from E.I. Dupont de Nemours and Co., Wilmington, Del. under the trade designation Ludox ® ) . If thicker layers are needed, however, said coatings will still show a loss of adhesion. It is an object of the invention to provide an improved coating for lamps with a relatively high critical layer thickness.
  • the object can be achieved by providing a coating according to the preamble, characterized in that in addition high-surface particles having a BET specific surface area of more than 100 m 2 /g are incorporated in said network.
  • high-surface particles having a BET specific surface area of more than 100 m 2 /g are incorporated in said network.
  • the critical layer thickness of the coating can be significantly increased by incorporating said high surface particles into the network obtainable by conversion of an organically modified silane by means of a sol-gel process.
  • the addition of the high-surface particles to the coating increases the critical layer thickness by up to about 30 micrometers without the risk of loss of adhesion.
  • the high-surface particles improve the flexibility of the coating layer, resulting in a diminished stress concentration within said layer, in particular during curing of the layer.
  • the coating according to the invention thus provides an improved coating which can be applied to a lamp surface in relatively thick layers in a relatively sustainable way without the coating layer flaking off or being exfoliated during curing of the layer and/or during operation of the at least partly coated lamp.
  • the high-surface particles are preferably amorphous and/or porous to realize the relatively large external surface area of the high-surface particles with respect to the total volume of these particles. It is noted that the lower limit of the BET specific surface area of 100 m 2 /g is determined by nitrogen absorption capacity using the commonly known Brunauer-Emmitt-Teller (BET) procedure.
  • said high-surface particles are formed by microparticles with an average diameter between 0.1 and 0.5 micrometer, more preferably with an average diameter of 0.3 micrometer.
  • High-surface particles with a diameter within this range are found to be suitable for application, i.e. they generate a sufficient relaxation within the coating layer to allow the aforementioned increase of the critical layer thickness of up to about 30 micrometers.
  • Said high-surface particles are preferably formed by an oxide, more preferably by aluminum oxide (Al 2 O 3 ), most preferably aluminum oxide in the gamma phase ( ⁇ - Al 2 O 3 ).
  • Gamma- Al 2 O 3 is de facto a defective spinel phase of alumina with cation site randomly distributed vacancies.
  • Gamma- Al 2 O 3 marketed inter alia under the product code CRl 25 (obtainable from Baikowski), is formed by particles with an average diameter of 0.3 micrometer having a BET specific surface area of 105 m 2 /g. A dispersion of these particles in a liquid dispersant is substantially transparent, the alumina particles having a wavelength-independent, substantially uniform reflection. These properties make gamma- Al 2 O 3 particularly suitable to be incorporated into an optical coating. It has been found that the stability and in particular the critical layer thickness of the coating according to the invention are substantially determined by the content of the high-surface relaxation particles in the network obtainable by conversion of an organically modified silane by means of a sol- gel process. For this reason it is advantageous that the percentage of high-surface particles per unit of volume dry coating should be at least 5% if a relatively thick and yet stable and sustainable coating layer is to be obtained.
  • Another major drawback of the coating known from the prior art is that sagging of the known coating is very likely to happen when coatings are applied on convex surfaces because of insufficient rheologic behavior. This sagging effect results in an irregular coating pattern which not only has a negative effect on the optical and aesthetical properties of the coating, but commonly also leads to the critical layer thickness being exceeded, which will result in a disadvantageous loss of adhesion. Formation of a relatively inhomogeneous coating layer with an uncontrolled edge definition can be prevented in that a coating according to the invention, and further comprising a thickening agent, is applied. Like the high-surface particles, the thickening agent stabilizes and consolidates the layer formed of the - coating according to the invention.
  • the incorporation of the high-surface particles into the network obtainable by conversion of an organically modified silane by means of a sol-gel process may be omitted, whereas the thickening agent is incorporated into said network just to prevent sagging of the coating.
  • said thickening agent comprises at least one cellulose derivative (cellulosics), more preferably hydroxypropylcellulose.
  • cellulosics cellulose derivative
  • polyacrylate as a thickening agent.
  • modified cellulosics for example a hydrophobic modified hydroxyethylcellulose if thixotropy is needed.
  • said coating comprises a pigment for absorbing and/or reflecting part of the visible or UV light.
  • a pigment for absorbing and/or reflecting part of the visible or UV light is preferably made of inorganic pigments.
  • the pigment is selected from the group formed by iron oxide, iron oxide doped with phosphorus, zinc-iron oxide, cobalt aluminate, neodymium oxide, bismuth vanadate, zirconium-praseodymium silicate, and mixtures thereof.
  • Fe 2 O 3 is an orange pigment and P-doped Fe 2 O 3 is an orange-red pigment.
  • Zinc-iron oxide for example ZnFe 2 O 4 or ZnO-ZnFe 2 O 4 is a yellow pigment.
  • Mixing (P-doped) Fe 2 O 3 with ZnFe 2 O 4 yields a pigment of a deep orange color.
  • Cobalt aluminate (CoAl 2 O 4 ), neodymium oxide (Nd 2 O 5 ) and Hostaperm Blue are blue pigments.
  • Bismuth vanadate (BiVO 4 ), also referred to as pucherite, is a yellow-green pigment.
  • Zirconium-praseodymium silicate is a yellow pigment.
  • coatings are obtained wherein organic pigments are used.
  • organic pigments are the so-called Red 177 (anthraquinone) and chromium phthalic yellow or chromium phthalic red from "Ciba”.
  • Red 149 perylene
  • Red 122 quinacridone
  • Red 257 Ni-isoindoline
  • Violet 19 quinacridone
  • Blue 15:1 Cu-phthalocyanine
  • Green 7 hal.Cu-phthalocyanine
  • Yellow 83 yellow 83 (dyaryl) from “Clariant”.
  • Amber-colored chromophtal yellow, chemical formula C 22 H 6 C I sN 4 O 2 and C.I. (constitution number) 56280, is an organic dye and is also referred to as "C.I.-110 yellow pigment", "C.I.
  • pigment yellow 137 or Bis[4,5,6,7-tetrachloro-3-oxoisoindoline-l-ylidene)-l,4-phenylenediamine.
  • Amber- colored anthraquinone, chemical formula Cs 7 H 2I NsO 4 and C.I. 60645, is an organic dye and is also referred to as "Filester yellow 2648 A” or "Filester yellow RN", chemical formula 1,1'- [(6-phenyl-l ,3,5-triazine-2,4diyl)diimino]bis-. Red-colored "chromophtal red A2B" with C.I.
  • 65300 is an organic dye and is alternatively referred to as "pigment red 177", dianthraquinonyl red, or as [ 1 , 1 '-Bianthracene] -9,9', 10, 10'-tetrone, 4,4'- diamino-(TSCA, DSL).
  • Pigment red 177 dianthraquinonyl red
  • Mixtures of inorganic and organic pigments are also suitable, for example a mixture of chromium phthalic yellow and (zinc)iron oxide.
  • An alternative embodiment of the coating in accordance with the invention is characterized in that the pigment causes a change in the color temperature of the lamp.
  • a preferred embodiment of the coating according to the invention is characterized in that the reflecting particles are selected from the group formed by aluminum, silver, aluminum oxide, titanium (di)oxide, calcium halophosphate, zinc oxide, barium sulphate, and calcium carbonate.
  • aluminum oxide marketed under the product code CR6 (obtainable from Baikowski) is applied as a (reflective) white pigment, CR6 consisting substantially of alumina particles with an average diameter of 0.6 micrometer and a BET specific surface area of 6 m 2 /g.
  • Aluminum oxide marketed under the product code CR125 may be applied as a reinforcing agent to improve the strength of the coating. However, no considerable reflectance can be realized based upon solely CRl 25 owing to the relatively small particle size of CR125.
  • both CR6 and CR125 are incorporated into the network obtainable by conversion of an organically modified silane by means of a sol-gel process, wherein the volume ratio of CR6:CR125 is substantially equal to 6:1 (to be able) to achieve both the desired optical properties and the desired strength and toughening of the coating caused by the particular alumina matrix formed within said coating.
  • an average diameter d p of the pigment particles complies with d p ⁇ 100 nm.
  • Optically transparent coatings are obtained which exhibit relatively little light scattering with the use of pigments of such relatively small dimensions.
  • the coating according to the invention is often applied in specially designed reflectors, wherein the light source is embodied so as to be punctiform, light scattering by the coatings is an undesirable property.
  • the effect of light scattering is at least substantially precluded if the average diameter of the pigment particles d p ⁇ 50 nm.
  • Particularly suitable coatings are obtained when a pigment composed of a mixture of iron oxide and bismuth vanadate, or of a mixture of iron oxide doped with phosphorus and bismuth vanadate, is used in the coating.
  • Said organically modified silane is preferably selected from a group formed by compounds of the following structural formula: PJSifOR 11 ⁇ , wherein R 1 comprises an organic group, preferably an alkyl group or an aryl group, and wherein R ⁇ comprises an alkyl group.
  • R 1 comprises an organic group, preferably an alkyl group or an aryl group
  • R ⁇ comprises an alkyl group.
  • the network in accordance with the invention has fewer than four network bonds per Si atom.
  • a network partly composed of said alkyl or aryl groups has a greater elasticity and flexibility than the customarily used silica network. This enables relatively thick coatings to be manufactured.
  • the R 1 group comprises CH 3 or C 6 H 5 . These substances have a relatively good thermal stability.
  • a network comprising methyl or phenyl groups enables thicker coatings to be obtained.
  • coatings in which methyl or phenyl groups are incorporated into a network are stable up to a temperature of at least 35O 0 C. Said groups are end groups in the network and remain part of the network at said higher temperatures.
  • Ri comprises an organic group in the form of an epoxy-amino group, since the operating temperature and the UV output of fluorescent lamps are relatively low, such coatings can be applied and are stable during the operational life of the discharge lamp.
  • the R 11 group comprises CH 3 or C 2 Hs.
  • Methyl and ethyl groups are particularly suitable because methanol and ethanol are formed in the hydrolysis process, which substances are compatible with the pigment dispersion and evaporate relatively easily.
  • the methoxy groups (-OCH 3 ) react more rapidly than the ethoxy groups (-OC 2 H 5 ) which, in turn, react more rapidly than (iso)propoxy groups (-OC 3 H 7 ).
  • R 11 groups which are not very long.
  • MTMS methyltrimethoxy silane
  • MTES methyltriethoxy silane
  • PTMS phenyltrimethoxy silane
  • PTES phenyltriethoxy silane
  • GLYMO glycidoxypropyltri(m)ehtoxysilane
  • the invention also relates to a lamp comprising a vessel or a bulb, wherein said vessel or said bulb is at least partially provided with a coating according to the invention;
  • the lamps provided with a coating according to the invention may be of various kinds.
  • the coating is preferably applied to a light-transmitting discharge vessel of a discharge lamp, the discharge lamp further comprising a discharge vessel that encloses, in a gastight manner, a discharge space provided with a filling of an ionizable substance and that comprises means for maintaining a discharge in the discharge space, while at least a portion of the discharge vessel is provided with said coating of a luminescent layer of a luminescent material, and at least a portion of the discharge vessel facing away from the discharge space is provided with the coating according to the invention.
  • the coating may be applied both to low-pressure discharge lamps, for example a low-pressure mercury vapor discharge lamp, and to high-intensity discharge (HID) lamps, for example HID automotive headlights. It is, however, also conceivable to apply the coating according to the invention to conventional incandescent lamps.
  • low-pressure discharge lamps for example a low-pressure mercury vapor discharge lamp
  • HID high-intensity discharge
  • the invention further relates to an electronic device comprising at least one lamp according to the invention.
  • the device is selected from the group formed by the following electronic devices: a solarium or other sun panel for tanning, an LCD (in particular LCD backlighting), an automotive device or vehicle, and a signaling device.
  • a reflecting coating is prepared from 40 g methyltrimethoxysilane, 1 g glycolic acid, 20 g ethanol, and 40 g Ludox® TMA (Aldrich 34 wt.% silica in water, deionized sol). The solution is hydrolyzed for 45 minutes.
  • a pigment paste is prepared from 36 g CR-6, 6 g CR-125, 6 g Disperbyk 190 (0.05 g Disperbyk / g CR-6 and 0.7 g Disperbyk / g CR-125), and 40 g water. The pigment paste is milled with a high-speed dissolver and added to the hydrolysis mixture.
  • the coating liquid is deposited on the outer surface of the discharge vessel by means of spraying. After deposition, the coating is dried at 90 0 C for 5 minutes and subsequently cured for 30 minutes at 150°C.
  • a reflecting coating is prepared form 40 g methyltrimethoxysilane, 1 g glycolic acid, 20 g ethanol, and 40 g Ludox® TMA (Aldrich 34 wt.% silica in water, deionized sol). The solution is hydrolyzed for 45 minutes.
  • a pigment paste is prepared from 36 g CR-6, 6 g CR-125, 6 g Disperbyk 190 (0.05 g Disperbyk / g CR-6 and 0.7 g Disperbyk / g CR-125), and 40 g of a 1 wt% Klucel M solution in water. The pigment paste is milled with a high-speed dissolver and added to the hydrolysis mixture.
  • the coating liquid is deposited on the outer surface of the discharge vessel by means of spraying. After deposition, the coating is dried at 9O 0 C for 5 minutes and subsequently cured for 30 minutes at 150 0 C.
  • sol-gel process many alternative preparation methods are possible.
  • pigment combinations to cause the color point to shift towards red.
  • the color temperature of the light to be emitted by the electric lamp can be raised while, for example, the color co-ordinates remain substantially positioned on the blackbody locus.
  • the scope of protection of the invention is not limited to the examples given herein.
  • the invention is embodied in each novel characteristic and each combination of characteristics.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L'invention concerne un revêtement pour lampes comprenant un réseau qui peut être obtenu par conversion d'un silane organiquement modifié au moyen d'un procédé sol-gel, dans lequel les particules de silice obtenues à partir d'une dispersion de silice colloïdale stabilisée sont sensiblement incorporées dans ledit réseau. L'invention concerne également une lampe comprenant un récipient ou une ampoule, ledit récipient ou l'ampoule étant au moins partiellement recouvert de ce revêtement. L'invention concerne enfin un dispositif électronique comprenant au moins cette lampe.
PCT/IB2005/053741 2004-11-18 2005-11-14 Revetement pour lampes et lampe au moins partiellement recouverte de ce revetement Ceased WO2006054227A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04105891.8 2004-11-18
EP04105891 2004-11-18

Publications (2)

Publication Number Publication Date
WO2006054227A2 true WO2006054227A2 (fr) 2006-05-26
WO2006054227A3 WO2006054227A3 (fr) 2006-08-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2921931A1 (fr) * 2007-10-09 2009-04-10 Saint Gobain Rech Sa Composition sol-gel coloree
WO2010112792A1 (fr) * 2009-04-03 2010-10-07 Sgd S.A. Procede de fabrication d'un recipient en verre et recipient correspondant
EP2927932A1 (fr) * 2014-03-31 2015-10-07 Toshiba Lighting & Technology Corporation Lampe incandescente avec revetement reflectif

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
JP2003509825A (ja) * 1999-09-13 2003-03-11 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 電 灯
WO2004044486A2 (fr) * 2002-11-14 2004-05-27 Koninklijke Philips Electronics N.V. Substrat emetteur de lumiere pourvu d'un revetement absorbant la lumiere
US20060055331A1 (en) * 2002-11-14 2006-03-16 Koninklijke Philips Electronics, N.V. Light-transmitting substrate provided with a light-absorbing coating as well as a method of preparing a light-absorbing coating

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2921931A1 (fr) * 2007-10-09 2009-04-10 Saint Gobain Rech Sa Composition sol-gel coloree
WO2010112792A1 (fr) * 2009-04-03 2010-10-07 Sgd S.A. Procede de fabrication d'un recipient en verre et recipient correspondant
FR2944007A1 (fr) * 2009-04-03 2010-10-08 Sgd Sa Procede de fabrication d'un recipient en verre et recipient correspondant.
US8852699B2 (en) 2009-04-03 2014-10-07 Sgd S.A. Method of fabricating a glass container, and a corresponding container
EP2927932A1 (fr) * 2014-03-31 2015-10-07 Toshiba Lighting & Technology Corporation Lampe incandescente avec revetement reflectif
US9263246B2 (en) 2014-03-31 2016-02-16 Toshiba Lighting & Technology Corporation Lamp
TWI658490B (zh) * 2014-03-31 2019-05-01 日商東芝照明技術股份有限公司 燈

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