DK154065B - Fremgangsmaade til ved paadampning i vakuum paa en glasplade at anbringe et varmereflekterende metallag - Google Patents

Fremgangsmaade til ved paadampning i vakuum paa en glasplade at anbringe et varmereflekterende metallag Download PDF

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DK154065B
DK154065B DK594473AA DK594473A DK154065B DK 154065 B DK154065 B DK 154065B DK 594473A A DK594473A A DK 594473AA DK 594473 A DK594473 A DK 594473A DK 154065 B DK154065 B DK 154065B
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glass plate
layer
heat
solar radiation
respect
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DK594473AA
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DK154065C (da
DK594473A (da
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Rolf Groth
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Delog Detag Flachglas Ag
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3615—Coatings of the type glass/metal/other inorganic layers, at least one layer being non-metallic
    • 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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3628—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer one layer at least containing a sulfide
    • 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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3644—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the metal being silver
    • 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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3649—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer made of metals other than silver
    • 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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3652—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the coating stack containing at least one sacrificial layer to protect the metal from oxidation
    • 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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3657—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating having optical properties
    • C03C17/366—Low-emissivity or solar control coatings
    • 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
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3681—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating being used in glazing, e.g. windows or windscreens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/02—Noble metals
    • B32B2311/08—Silver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/12—Copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/08—Glass

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  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Surface Treatment Of Glass (AREA)
  • Laminated Bodies (AREA)
  • Optical Filters (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Securing Of Glass Panes Or The Like (AREA)

Description

DK 154065 B
Den foreliggende opfindelse angår en fremgangsmåde til ved pådampning i vakuum på en glasplade at anbringe et varmereflek-terende metallag og af den i krav l's indledning angivne art.
En sådan fremgangsmåde kendes fra NL patentansøgning nr.
5 7.108.021. Ved den kendte fremgangsmåde består det varmere- flekterende metallag af et guldlag. Den fra dette nederlandske patentskrift nr. 7.108.021 kendte fremgangsmåde fremstillede varmereflekterende glasplade er tilpasset til de tilfælde, hvor der ikke kræves nogen stor lystransmissionsevne, men hvor 10 det i det væsentlige kommer an på en formindskelse af de indre rums varmebelastning, således at de fortrinsvis vælges til kontorlokaler og tilsvarende rum. Der er dog vanskeligheder i forbindelse med brug af guld til pådampning af det varmereflekterende lag. Især har de kendte glasplader set udefra en ten-15 dens i retning mod blåt, medens en neutral gråfarvet tone er ønskelig.
Fagmanden, der søger en løsning på den nævnte vanskelighed, vil på grundlag af de relevante egenskaber for andre materia-20 ler (se Zeitschrift fUr Metallkunde 58 (1967) side 768-778,
Zeitschrift flir Physik 161, side 163-178 (1961) og Advance in
Physics 6, side 102-144 (1957)) mene, at en erstatning af guldlaget i en glasplade ved den ifølge NL patentansøgning nr.
71 08 021 kendte fremgangsmåde med sølv, hvis egenskaber på 25 mange punkter stemmer overens med guldets, vil forstærke den blå tone i stedet for at tage denne væk som tilsigtet. Fremgangsmåden ifølge den foreliggende opfindelse beror på den overraskende kendsgerning, at den angivne fordom ikke bekræftes .
30
Den indledningsvist omtalte fremgangsmåde er derfor ejendommelig ved, at det varmereflekterende metallag består af sølv.
Det bemærkes, at en fremgangsmåde for ved pådampning i vakuum 35 at anbringe et lag sølv som varmemodvirkende metallag på en glasplade i sig selv er kendt fra DE offentliggørelsesskrift 1.596.825, hvorved der imidlertid sammen med andre pådampede lag formes et interferensfilter, og denne kendte fremgangsmåde fortrinsvis udføres med guld.
DK 154065 B
2
Fremgangsmåden ifølge opfindelsen forklares nærmere i forbindelse med den efterfølgende figurbeskrivelse, hvor to udførelseseksempler forklares i enkeltheder på grundlag af tegningen, hvor 5 fig. 1 viser skematisk og set i snit en varmereflekterende glasplade fremstillet ifølge opfindelsen, og fig. 2 spektrale transmissions- og reflektionskurver for en 10 varmereflekterende glasplade fremstillet ifølge opfindelsen med et sølvlag for bølgeområdet fra 400 til 2500 nm.
På et i fig. 1 vist transparent substrat 1, der består af silikatglas, befinder der sig et absorptionslag 2, der igen er 15 belagt med et sølvlag 3. På sølvlaget 3 er et antireflektionslag 4 anbragt. Absorptionslaget 2 består af en chrom-nikkellegering med 20 vægt% chrom og 80 vægt% nikkel og er så tykt, at lystransmissionsgraden for den af det transparente substrat 1 og af absorptionslaget 2 bestående delsammensætning er ca. 17% 20 mindre end lystransmissionsgraden for det transparente sub strat alene. Sølvlågets tykkelse afhænger af den ønskede lystransmissionsgrad for den varmereflekterende glasplade og ligger almindeligvis ca. i området fra 15 til 40 nm. Antire-flektionslaget 3 består af ZnS og er ca. 45 nm tykt, således 25 at det har en god antiref lektionsvirkning i området for det synlige lys. Ved indsætningen af glaspladen eller ruden frem stillet ifølge opfindelsen placeres den således i vinduesrammen, at det transparente substrat befinder sig på vinduets udvendige side.
30
Den i fig. 2 viste kurve a gengiver den spektrale transmissionsgrad for en varmereflekterende vinduesrude med sølvbelægning fremstillet ifølge opfindelsen i bølgelængdeområdet fra 400 til 2500 nm. Transmissionsgraden er størst i det bølgelængde-35 område, for hvilket det menneskelige øje er mest følsomt, altså i området på ca. 550 nm. Hen imod de større bølgelængder aftager transmissionsgraden meget kraftigt, således at solstrålingens infrarøde del kun i meget ringe grad kan passere gennem ruden.
DK 154065B
3
Af forløbet for kurven b, som gengiver den spektrale reflektion af ruden set fra det transparente substrats side fremgår, at solstrålingens infrarøde del med de lange bølger reflekteres meget kraftigt. I det synlige område adskiller reflektions-5 koefficienten sig i forhold til en rude med guldlag væsentligt mindre for de forskellige bølgelængder. Dette resulterer i, at ruden set udefra får en praktisk taget neutral farve med en meget svag blågrå nuance, hvilket arkitektonisk set er meget ønskeligt, da en rude, der ved betragtning udefra i det væsent-10 lige virker farveneutralt, muliggør en farvemæssig kombination med det største antal forskellige facadeelementer. I denne henseende er varmebeskyttelsesruderne fremstillet ifølge opfindelsen overlegne i forhold til de guldbelagte ruder, der fremgår af beskrivelsen til trysk fremlæggelsesskrift nr.
15 2.029.181, ved hvilke den blågrå farvede!, når ruden betragtes udefra, er mere udpræget.
Den i fig. 2 viste kurve c gengiver det spektrale forløb af reflektionen af det interferens-anti-reflektionslag, der er 20 anbragt på rudens indad vendende side. Af kurven c ses det, at reflektionsevnen for en anden fremstilling ved fremgangsmåden ifølge opfindelsen specielt i bølgelængdeområdet med stor øje-følsomhed i sammenligning med det infrarøde bølgelængdeområde i forhold til et enkelt-sølvlåg er væsentligt lavere, hvorved 25 reflektionsvirkningen i det væsentlige forsvinder, sammenlignet med kendt rude med et enkeltlag af sølv.
Herved bliver spejlvirkningen set fra indersiden i sammenligning med enkeltlag af sølv i det væsentlige afbrudt eller for-30 hindret. Ganske vist er reflektionsevnen indefra ved rudemate-rialet fremstillet ved fremgangsmåden ifølge opfindelsen indenfor bølgelængdeområdet med stor følsomhed og også reflektions-evnen udefra (kurve b) større end for det fra NL patentansøgning nr. 71 08 021 kendte varmereflekterende rudemateriale, 35 men den kraftige forbedring af det neutrale udseende udefra gør ref lektionsevneforøgelsen i det synlige bølgelængdeområde set fra antireflektionslagets side mere acceptabel, medens reflektionsforøgelsen set fra det transparente substrats side
DK 154065 B
4 har arkitektoniske fordele, fordi sådanne facader, der er forsynet med rudematerialet fremstillet ved fremgangsmåden ifølge opfindelsen i vinduesområderne, frembyder et særligt levende udseende, hvorved ethvert mat, dødt indtryk undgås.
5 1. udførelseseksempel I et storindustrielt dampbelægningsanlæg med fordampningsorganer til påføring af tre lag anbringes en floatglasplade, der 10 er 5 mm tyk og 2 x 3 m stor. Efter at fordamperskibene er forsynet med en chrom-nikkellegering bestående af 80 vægt% nikkel og 20 vægt% chrom, henholdsvis med sølv og zinksulfid, udpumpes anlægget til et tryk på ca. 3 x 10"2 Torr. Derefter renses glasoverfladen i 8 minutter ved hjælp af giimmudladning og 15 befries for eventuelt vedhæftende vandlag. Efter yderligere udpumpning til et tryk på 6 x 10“5 Torr dampes lagene 2, 3 og 4 på floatglaspladen.
Ved pådampning af chrom-nikkellegeringen nedsættes floatglas-20 pladens lystransmissionsgrad, der før pådampningens begyndelse andrager 90%, til 75%. Det efter pådampningen af sølvlaget pådampede ZnS-lag er ca. 46 nm tykt.
Den således fremstillede vinduesrude udviser følgende optiske 25 egenskaber:
Lystransmission (med hensyn til øjets følsomhed) = 55%.
Ref1ektionsevne for den side, hvorpå lagene er (med hensyn til 30 solens totalstråling) = 48%.
Reflektionsevne for glassiden (med hensyn til solens totalstråling) = 41%.
35 Transmissionsgrad (med hensyn til solens totalstråling) = 34%.
Ruden indsættes ved brug således i en vinduesramme, at glassiden befinder sig udvendigt efter indsætningen. Ved betragtning

Claims (4)

15 Lystransmission (med hensyn til øjets følsomhed) = 45%. Reflektionsevne for lagsiden (med hensyn til solens totalstråling) = 51%.
20 Ref lektionsevne for g1as.s.iden (med hensyn til solens totalstråling) = 43%. Transmissionsgrad (med hensyn til solens totalstråling) = 27%.
25 Også den efter eksempel 2 fremstillede rude udviser, efter indsætning i en vinduesramme på en sådan måde, at glaspladen vender udefter, en behagelig, ensartet og praktisk taget neutral farvetone, og man kan ikke opdage nogen form for skylignende uregelmæssighed, når man ser igennem ruden. 30 Patentkrav.
1. Fremgangsmåde til ved pådampning i vakuum på en glasplade 35 at anbringe et varmereflekterende metallag på et direkte på glaspladen anbragt absorberende lag, hvorefter der på det varmeref lekterende metallag anbringes et antireflektionslag, hvorved man får en glasplade med en transmissionsevne for synligt DK 154065 B lys på 20 - 60%, hvorved absorptionslaget bestående af et metal, et halvmetal eller en metallegering, med et brydningsforhold og en ekstinktionskoefficient af samme størrelsesorden, sammen med glaspladen, har en lystransmissionsevne, der er 10 5 - 65% mindre end for glaspladen alene, og hvor antireflektions laget har et brydningsforhold, der er større end 1,7, kendetegnet ved, at det varmereflekterende lag består af sølv. 10 15 20 25 30 35
DK594473A 1973-07-05 1973-11-02 Fremgangsmaade til ved paadampning i vakuum paa en glasplade at anbringe et varmereflekterende metallag DK154065C (da)

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Application Number Priority Date Filing Date Title
DE2334152 1973-07-05
DE2334152A DE2334152B2 (de) 1973-07-05 1973-07-05 Wärmereflektierende, 20 bis 60% des sichtbaren Lichtes durchlassende Fensterscheibe mit verbesserter Farbneutralltät In der Ansicht und ihre Verwendung

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DK594473A DK594473A (da) 1975-03-17
DK154065B true DK154065B (da) 1988-10-10
DK154065C DK154065C (da) 1989-03-06

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US (1) US3978273A (da)
JP (1) JPS5855089B2 (da)
AR (1) AR206891A1 (da)
BE (1) BE817317R (da)
BR (1) BR7405224A (da)
CA (1) CA1009073A (da)
CH (1) CH575890A5 (da)
DD (1) DD111888A5 (da)
DE (1) DE2334152B2 (da)
DK (1) DK154065C (da)
ES (1) ES427091A2 (da)
FR (1) FR2235886B2 (da)
GB (1) GB1413463A (da)
IE (1) IE39902B1 (da)
IL (1) IL44986A (da)
IT (1) IT1046127B (da)
NL (1) NL172437C (da)
NO (1) NO742417L (da)
SE (1) SE390294B (da)
ZA (1) ZA743142B (da)

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GB1413463A (en) 1975-11-12
CH575890A5 (da) 1976-05-31
SE390294B (sv) 1976-12-13
US3978273A (en) 1976-08-31
NL7407064A (nl) 1975-01-07
FR2235886A2 (da) 1975-01-31
DD111888A5 (da) 1975-03-12
IL44986A0 (en) 1974-09-10
AR206891A1 (es) 1976-08-31
IT1046127B (it) 1980-06-30
ES427091A2 (es) 1976-11-16
CA1009073A (en) 1977-04-26
BR7405224A (pt) 1976-11-30
DE2334152B2 (de) 1975-05-15
IL44986A (en) 1979-07-25
DE2334152A1 (de) 1975-01-30
FR2235886B2 (da) 1982-04-16
IE39902L (en) 1975-01-05
NL172437C (nl) 1983-09-01
JPS5039314A (da) 1975-04-11
AU6986674A (en) 1975-12-11
SE7313509L (da) 1975-01-07
NL172437B (nl) 1983-04-05
ZA743142B (en) 1975-05-28
DK154065C (da) 1989-03-06
IE39902B1 (en) 1979-01-31
NO742417L (da) 1975-02-03
JPS5855089B2 (ja) 1983-12-08
BE817317R (fr) 1975-01-06
DK594473A (da) 1975-03-17

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