WO1999013013A1 - Substrat enduit pour luminaires et procede de production - Google Patents

Substrat enduit pour luminaires et procede de production Download PDF

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Publication number
WO1999013013A1
WO1999013013A1 PCT/NO1998/000260 NO9800260W WO9913013A1 WO 1999013013 A1 WO1999013013 A1 WO 1999013013A1 NO 9800260 W NO9800260 W NO 9800260W WO 9913013 A1 WO9913013 A1 WO 9913013A1
Authority
WO
WIPO (PCT)
Prior art keywords
lacquer
accordance
particles
transparent
binder
Prior art date
Application number
PCT/NO1998/000260
Other languages
English (en)
Inventor
Cornelis Spooren
Steve Taylor
Merete Hallenstvet
Original Assignee
Norsk Hydro Asa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Norsk Hydro Asa filed Critical Norsk Hydro Asa
Priority to AU90980/98A priority Critical patent/AU9098098A/en
Publication of WO1999013013A1 publication Critical patent/WO1999013013A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/004—Reflecting paints; Signal paints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings

Definitions

  • Coated substrate for lighting appliances and a method for the production of such a material.
  • the coated substrate may be used in appliances provided with a separate light source, such as lamps, fixtures etc., but in general the coated substrate may be used in any application suitable. For instance, ceiling elements or partition walls formed of the coated substrate may be used in systems for indirect lighting or in daylight systems.
  • a material suitable for use as a reflecting material for lighting purposes has to fulfil certain demands.
  • the material should have the highest possible reflectivity.
  • the material should in addition have certain light scattering properties. It should withstand mechanical stresses e.g. in forming operations and it should withstand cleaning operations without the formation of scratches. Protective layers on the surface of the material must adhere properly to the substrate. Finally, the material should have the lowest weight possible.
  • aluminium material As early as in the thirties aluminium material was found to comply with many of the above mentioned demands. Compared with other materials, silver is the only material that is found to have better reflection properties than aluminium. The ductility properties of aluminium are good while its weight is low.
  • Aluminium is a soft material, and in physical contact with other materials it is easily damaged.
  • an unprotected surface of aluminium is disposed to corrosion.
  • lighting appliances included it is therefore necessary to protect the surface.
  • the most common protection methods involve anodising or lacquering.
  • reflectors were originally a typical batch process. First, reflector parts are formed from the rolled material. Following this, the parts are assembled to form complete reflectors or louvres. Then the louvres are brightened by a chemical or an electrochemical process and are given a protective layer in an anodising step or by coating with a lacquer.
  • the rolling mills continued to improve their processes, and as a result, the need for brightening the material chemically or electro-chemically was reduced.
  • the material brightness is mainly created by the rolling mill.
  • the role of the following coil process is merely to increase the reflectivity of the rolled substrate (without reducing the gloss), and to anodise the material for chemical and mechanical protection.
  • the rolling mills have developed a technique in which the first step is to produce an isotropic, bright material, followed by the introduction of isotropic roughness on the surface by the use of a textured working roll in the final rolling step.
  • the price of such materials will usually be as high as or even higher than the expensive bright qualities.
  • the rolling process has limited possibilities for the production of optically isotropic materials with various light scattering properties.
  • the processes which have been developed are cost increasing.
  • the anodising process demands pure and expensive alloys for the production of bright and/or highly reflective materials.
  • the anodising process has limited possibilities for the production of various light scattering properties.
  • the exeption is the "semi specular" quality but which has limitations with respect to aesthetic and functional optical properties.
  • the forming properties of coil-anodised materials are limited.
  • the anodic film may crack by forming operations and the optical properties and corrosion protection may be destroyed.
  • the cleaning of an anodised material is difficult, in particular the removal of finger prints.
  • the present invention thus relates to a novel lacquer system that is intended to create the possibility of producing high quality materials for lighting purposes without the use of very pure alloy qualities and expensive surface treatment processes
  • particle materials which may be used in conjunction with standard transparent binder systems are transparent materials such as SiO 2 (Silica) or Polyamide (Nylon).
  • the aluminium substrate should have a highest possible reflectivity prior to coating.
  • a relatively high reflectivity, even on standard aluminium alloys e.g. AA 1200 or AA 1050, may be obtained by the removal of 1-2 micrometers of the alloy surface, preferably in a chemical or electrochemical process.
  • the light scattering may be varied over a wide range maintaining the reflectivity of the material.
  • the gloss levels that are achieved depend upon the gloss level of the substrate material.
  • a bright and sufficient isotropic substrate it is possible to vary the light scattering properties over the widest possible range, in order to produce relatively matt materials, it is advantageous to use a standard mill finish substrate (in particular with respect to costs).
  • a sufficient amount of particles it is possible to achieve a surface that both with respect to functionality and aesthetic properties is comparable to materials produced by chemical etching and anodising, but with a higher reflectivity and at a substantial lower cost.
  • the bright material as produced in accordance with the Applicant's co-pending Norwegian patent application, filed at the same date as the present application may be used as a substrate material in the present invention.
  • lacquer relaxes the requirements with regard to the alloy purity compared to anodising.
  • the total reflection is as good as or even better than that of an anodised substrate produced from the same material quality.
  • the system allows the use of recycled materials.
  • a lacquered material has better forming and cleaning properties than an anodised material.
  • the use of a lacquer system creates the possibility of manufacturing materials with a variety of optical properties, less dependent on the properties of the substrate material.
  • the present invention it is possible to produce matt materials having light scattering properties and an appearance equivalent to that of materials that have been treated by chemical etching and anodising.
  • the reflection properties may even be improved compared to that of the state-of-the-art materials.
  • the invention do not require a good "etching response" of the substrate material. A good response to etching in the material will normally indicate that the material has reduced reflection properties after anodising.
  • example 1 relates to the production of a matt lighting material and example 2 relates to the production of a reflectormat lighting material.
  • Figure 1 relates to the development of gloss and total reflectivity as a function of the amount of particles in weight % on solid binder for the combination of binder system and particle type and size as described in example 1.
  • Example 1 Lighting materials with various gloss levels
  • Substrate AA 1200, Semi bright rolled
  • Lacquer composition Binder: acrylate
  • Solvent esters, hydrocarbons Particles: Silica (SiO 2 ), commercial quality (for instance
  • Viscosity 60 seconds (DIN 4 cup, 21 °C)
  • Example 2 reflectormat lighting material
  • Substrate AA 1200, Semi Bright rolled
  • Lacquer composition
  • Binder polyester, melamine
  • Particles Polyamide, commercial quality
  • Viscosity 60 seconds (DIN 4 cup, 21 °C)

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

Cette invention a trait à un matériau pour luminaires ainsi qu'au procédé de fabrication de ce matériau. On produit ce matériau en revêtant un substrat, de préférence en aluminium ou en alliage léger, d'un vernis-laque transparent renfermant certaines particules. En combinant différemment les particules de divers types et de diverses tailles ajoutées au vernis-laque transparent, on obtient un substrat revêtu doté de propriétés variées de diffusion de la lumière. Le coût de ce matériau produit grâce à ce procédé est relativement peu élevé.
PCT/NO1998/000260 1997-09-09 1998-08-28 Substrat enduit pour luminaires et procede de production WO1999013013A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU90980/98A AU9098098A (en) 1997-09-09 1998-08-28 Coated substrate for lighting appliances, and a method for the production of such a material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO974171 1997-09-09
NO974171A NO974171L (no) 1997-09-09 1997-09-09 Belagt substrat for lyskilder og en fremgangsmÕte for Õ produsere et slikt materiale

Publications (1)

Publication Number Publication Date
WO1999013013A1 true WO1999013013A1 (fr) 1999-03-18

Family

ID=19901097

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1998/000260 WO1999013013A1 (fr) 1997-09-09 1998-08-28 Substrat enduit pour luminaires et procede de production

Country Status (3)

Country Link
AU (1) AU9098098A (fr)
NO (1) NO974171L (fr)
WO (1) WO1999013013A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001075358A1 (fr) 2000-04-04 2001-10-11 Koninklijke Philips Electronics N.V. Luminaire
WO2002067024A1 (fr) * 2001-02-21 2002-08-29 Koninklijke Philips Electronics N.V. Luminaire
EP1243847A1 (fr) 2001-03-23 2002-09-25 Koninklijke Philips Electronics N.V. Luminaire
US6575602B2 (en) 2000-04-04 2003-06-10 Koninklijke Philips Electronics N.V. Luminaire with a light reflecting coating

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4617339A (en) * 1981-03-16 1986-10-14 Hunter Douglas International N.V. Lacquer, process for lacquering therewith, and articles lacquered therewith
GB2234249A (en) * 1989-07-17 1991-01-30 Ici Plc Coating compositions
US5014174A (en) * 1988-02-06 1991-05-07 Joung H. Won Reflection sheet for lighting or color-lighting
WO1997008252A1 (fr) * 1995-08-30 1997-03-06 Minnesota Mining And Manufacturing Company Feuille reflechissante pour afficheur a cristaux liquides illumines par l'arriere

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4617339A (en) * 1981-03-16 1986-10-14 Hunter Douglas International N.V. Lacquer, process for lacquering therewith, and articles lacquered therewith
US5014174A (en) * 1988-02-06 1991-05-07 Joung H. Won Reflection sheet for lighting or color-lighting
GB2234249A (en) * 1989-07-17 1991-01-30 Ici Plc Coating compositions
WO1997008252A1 (fr) * 1995-08-30 1997-03-06 Minnesota Mining And Manufacturing Company Feuille reflechissante pour afficheur a cristaux liquides illumines par l'arriere

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001075358A1 (fr) 2000-04-04 2001-10-11 Koninklijke Philips Electronics N.V. Luminaire
US6575602B2 (en) 2000-04-04 2003-06-10 Koninklijke Philips Electronics N.V. Luminaire with a light reflecting coating
WO2002067024A1 (fr) * 2001-02-21 2002-08-29 Koninklijke Philips Electronics N.V. Luminaire
EP1243847A1 (fr) 2001-03-23 2002-09-25 Koninklijke Philips Electronics N.V. Luminaire

Also Published As

Publication number Publication date
NO974171L (no) 1999-03-10
AU9098098A (en) 1999-03-29
NO974171D0 (no) 1997-09-09

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