NO855059L - REFLECTIVE LAYER COATING METHOD AND PROCEDURE FOR ITS PREPARATION. - Google Patents

REFLECTIVE LAYER COATING METHOD AND PROCEDURE FOR ITS PREPARATION.

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Publication number
NO855059L
NO855059L NO855059A NO855059A NO855059L NO 855059 L NO855059 L NO 855059L NO 855059 A NO855059 A NO 855059A NO 855059 A NO855059 A NO 855059A NO 855059 L NO855059 L NO 855059L
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Norway
Prior art keywords
silicic acid
varnish
coating agent
polysiloxane
agent according
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NO855059A
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Norwegian (no)
Inventor
Werner Aldinger
Richard Poellmann
Edith Eisenmenger
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Gfo Ges Fuer Oberflaechentech
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Application filed by Gfo Ges Fuer Oberflaechentech filed Critical Gfo Ges Fuer Oberflaechentech
Publication of NO855059L publication Critical patent/NO855059L/en

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    • 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
    • C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
    • C03C17/30—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/044—Forming conductive coatings; Forming coatings having anti-static properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2483/00—Characterised by the use of 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; Derivatives of such polymers

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Prostheses (AREA)
  • Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
  • Surface Treatment Of Glass (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Abstract

1. Coating agent for delustering coatings on transparent surfaces made from glass and plastics, in particular for delustering coatings on viewing screens, made from a thermally curable lacquer and a finely divided pigment based on silicic acid, characterised in that a polysiloxane lacquer, consisting of hydrolysis products of trialkoxysilanes and/or partial condensates of trisilanols, dissolved in lower aliphatic alcohols is used as the lacquer, and a mixture of a silicic acid, prepared thermally in an arc at approximately 3,500 degrees C or by flame hydrolysis at 550 to 1,250 degrees C, and a hydrophobic silicic acid prepared thermally by reacting the silanol groups, is used as the pigment, wherein the silicic acids in total are present in the lacquer in amounts of 0.5 to 15 wt%, and the hydrophobic silicic acid accounts for 5 to 40 wt% of the total silicic acid.

Description

Oppfinnelsen vedrører et belegningsmiddel for avspeilingssjikt på gjennomsiktige flater av glass eller kunststoffer, spesielt for avspeilingssjikt på bildeskjermer av en termisk herdbar lakk og et findelt pigment på kiselsyrebasis og en fremgangsmåte til dets fremstilling. The invention relates to a coating agent for a reflective layer on transparent surfaces of glass or plastics, in particular for a reflective layer on video screens of a thermally curable varnish and a finely divided pigment on a silicic acid basis and a method for its production.

Bildeskjermapparater, slik de finner anvendelse i datafor-arbeidelse, i kontororganisasjon eller i Computer-teknikk, fjernsynsbildeskjermer, skaladekker på fonoapparater, instrumentdekker i automobiler og andre gjennomsiktige flater av glass eller kunststoff, har for det meste glinsende overflater, hvorav det går ut forstyrrende lysrefleksjoner som vanskeliggjør den visuelle erkjennelse av informasjoner og kan føre til sunnhetsskader. Det er derfor viktig å avspeile slike flater uten at gjennomsiktigheten vesentlig på-virkes . Image display devices, as they are used in data processing, in office organization or in computer technology, television image screens, scale covers on phono equipment, instrument covers in automobiles and other transparent surfaces made of glass or plastic, mostly have shiny surfaces, from which disturbing light reflections emanate which makes the visual recognition of information difficult and can lead to health damage. It is therefore important to reflect such surfaces without significantly affecting the transparency.

Det er hittil blitt kjent en rekke metoder til best muligSo far, a number of methods have been known to the best possible extent

å avspeile bildeskjermer. En mulighet består i påføring av et tynt sjikt av en transparent lakk på bildeskjermen. De hertil anvendte lakker er imidlertid ikke tilstrekkelig bestandige ovenfor det kjemiske og mekaniske angrep av ren-gjøringsmidler . to mirror image screens. One possibility consists in applying a thin layer of a transparent varnish to the image screen. However, the varnishes used for this purpose are not sufficiently resistant to the chemical and mechanical attack of cleaning agents.

I EP-OS 1 02 830 omtales et belegningsmiddel for avspeilingssjikt og som består av en ved hjelp av UV-stråling herdbar akrylatlakk som inneholder et findelt fast polyakrylat. EP-OS 1 02 830 describes a coating agent for a reflective layer which consists of an acrylate varnish that can be cured by UV radiation and which contains a finely divided solid polyacrylate.

Slike avspeilingssjikt har på forskjellige underlag bare en utilstrekkelig klebefasthet og er heller ikke slitasje-bestandig nok. Such reflective layers have only insufficient adhesive strength on various substrates and are not wear-resistant enough either.

Fra EP-OS 85 190 er det kjent belegningsmidler for avspeilingssjikt, som består av en fernis og silikat eller en kisel-syreholdig vandig dispersjon. Disse belegningsmidler er riktignok ikke lagringsdyktige, men bør først fremstilles umiddelbart før deres anvendelse. From EP-OS 85 190, coating agents for reflective layers are known, which consist of a varnish and silicate or a silicic acid-containing aqueous dispersion. These coating agents are admittedly not storable, but should first be prepared immediately before their use.

Likeledes er det kjent lakker, hvor de fine partikler av silisiumdioksyd, titandioksyd eller aluminiumoksyd er disper-gert (EP-OS 1 02 830). Imidlertid er heller ikke disse av-speilingsmidler lagringsdyktige, da partiklene avsetter seg med tiden og derved gir forskjellige avspeilingssjikt. Varnishes are also known, in which the fine particles of silicon dioxide, titanium dioxide or aluminum oxide are dispersed (EP-OS 1 02 830). However, these anti-reflective agents are not storable either, as the particles settle over time and thereby produce different reflective layers.

Oppfinnelsens oppgave var å tilveiebringe et belegningsmiddel for avspeilingssjikt på gjennomsiktige flater av glass eller kunststoffer, spesielt for avspeilingssjikt på bildeskjermer av en termisk herdbar lakk og et findelt pigment på kiselsyrebasis som er lagringsdyktig og gir klebefaste-, slitasje-og kjemikaliebestandige avspeilingssjikt, som avgjørende minsker forstyrrende refleksjoner uten vesentlig å påvirke gjennomsiktigheten. Dessuten skulle det finnes en fremgangsmåte til fremstilling av slike belegningsmidler. The task of the invention was to provide a coating agent for a reflective layer on transparent surfaces of glass or plastics, in particular for a reflective layer on video screens of a thermally curable lacquer and a finely divided pigment on a silicic acid basis which is storable and provides adhesive, abrasion and chemical resistant reflective layers, which decisively reduces disturbing reflections without significantly affecting transparency. In addition, there should be a method for the production of such coating agents.

Denne oppgave løses ifølge oppfinnelsen ved at det som lakk anvendes en polysiloksanlakk og som pigment en blanding av en termisk fremstilt kiselsyre og en hydrofobert termisk fremstilt kiselsyre. This task is solved according to the invention by using a polysiloxane varnish as varnish and a mixture of a thermally produced silicic acid and a hydrophobic thermally produced silicic acid as a pigment.

Fortrinnsvis inneholder polysiloksanlakken hydrolyseprodukter av trialkoksysilaner og/eller delkondensater av trisilancler, oppløst i lavere alifatiske alkoholer, og eventuelt kolloidalt silisiumdioksyd. Spesielt har det vist seg egnet en polysiloksanlakk, hvis faststoffinnhold ifølge DIN 53216 utgjør 20-30% og består av kolloidalt silisiumdioksyd og delkondensater av trisilanoler. Preferably, the polysiloxane varnish contains hydrolysis products of trialkoxysilanes and/or partial condensates of trisilanes, dissolved in lower aliphatic alcohols, and possibly colloidal silicon dioxide. In particular, a polysiloxane varnish has proven suitable, whose solids content according to DIN 53216 is 20-30% and consists of colloidal silicon dioxide and partial condensates of trisilanols.

Polysiloksanlakkenes faststoffbestanddeler inneholder i det minste delvis stadig frie hydroksylgrupper, hvorover de ved anvendelse av forhøyet temperatur kan kryssbindes ved konden-sasjon. Sammensetningen av de i lakken tilstedeværende oppløsningsmidler må tilpasses det respektive substrat (uorganisk og organisk glass) for å oppnå en god klebefasthet av avspeilingssjiktene. Fortrinnsvis anvendes hertil en- og toverdige alifatiske alkoholer. The solid constituents of the polysiloxane lacquers contain at least partially still free hydroxyl groups, over which they can be cross-linked by condensation when an elevated temperature is applied. The composition of the solvents present in the varnish must be adapted to the respective substrate (inorganic and organic glass) in order to achieve good adhesion of the reflective layers. Monohydric and dihydric aliphatic alcohols are preferably used for this purpose.

Fortrinnsvis fremstilles de termisk fremstilte kiselsyrer i lysbuer ved ca. 3500°C eller ved flammehydrolyse ved 550-1250°C. Ikke egnet er kiselsyrer frembragt ved kjemisk ut-felling . Preferably, the thermally produced silicic acids are produced in electric arcs at approx. 3500°C or by flame hydrolysis at 550-1250°C. Silicic acids produced by chemical precipitation are not suitable.

Disse termisk fremstilte kiselsyrer har i fremstillings-tilstand BET-overflater fra 150-330 m<2>/g og midlere primær-partikkelstørrelse fra 6-40 nm. Sekundæraggregatene har diametere fra 2-15 pm. These thermally produced silicic acids have, in the manufacturing state, BET surfaces from 150-330 m<2>/g and average primary particle sizes from 6-40 nm. The secondary aggregates have diameters from 2-15 pm.

De nødvendige hydrofobe kiselsyrer fremstilles fordelaktig av hydrofile ved hjelp av flammehydrolyse frembragte kiselsyrer ved omsetning av silanolgruppene med eksempelvis di-metyldiklorsilan. The necessary hydrophobic silicic acids are advantageously produced from hydrophilic silicic acids produced by flame hydrolysis by reacting the silanol groups with, for example, dimethyldichlorosilane.

Kiselsyrene foreligger i polysiloksanlakken fortrinnsvis i mengder fra 0,5-15 vekt-%, spesielt i mengder fra 1-8 vekt-%, idet den hydrofoberte kiselsyre utgjør 5-40%, spesielt 8-30% a'den samlede kiselsyre. Den hydrofoberte kiselsyre er ansvar-lig for at de termisk fremstilte kiselsyrer i polysiloksanlakken viser et godt sveveforhold og dermed minskes en av-setning i forrådsbeholdere også under lengere forarbeidelses-tider. The silicic acids are present in the polysiloxane lacquer preferably in amounts from 0.5-15% by weight, especially in amounts from 1-8% by weight, the hydrophobized silicic acid constituting 5-40%, especially 8-30% of the total silicic acid. The hydrophobized silicic acid is responsible for the thermally produced silicic acids in the polysiloxane lacquer showing a good suspension ratio and thus reducing deposition in storage containers even during longer processing times.

For å oppnå en tydelig redusering av speilrefleksene somTo achieve a clear reduction of the specular reflections which

også bibehold av bildeskarpheten og høye transmisjons-verdier ved god overflateglatthet, må kiselsyren foreligge i finfordelt form. Det har vist seg egnet kornstørrelser also retention of image sharpness and high transmission values with good surface smoothness, the silicic acid must be present in finely divided form. Grain sizes have proven to be suitable

< 1 |jm, idet kornetheten måles med et grindometer ifølge< 1 |jm, the graininess being measured with a grindometer according to

DIN 53203. DIN 53203.

Fremstillingen av belegningsmidlet foregår derfor fortrinnsvis således at kiselsyrene males med en del av polysiloksanlakken så lenge inntil kornetheten av den pastøse blanding målt med et grindometer, har oppnådd en verdi på < 1 |jiru:i og deretter blandes med resten av polysiloksanlakken. Fortrinnsvis anvender man hertil en kulemølle. Etter en dis-pergeringstid på 30-50 timer får man lakker, som gir avspeil-ingss j ikt med høy bildeskarphet. The production of the coating agent is therefore preferably carried out in such a way that the silicic acids are ground with part of the polysiloxane varnish until the graininess of the pasty mixture, measured with a grindometer, has reached a value of < 1 |jiru:i and then mixed with the rest of the polysiloxane varnish. A ball mill is preferably used for this purpose. After a dispersion time of 30-50 hours, varnishes are obtained, which give a reflective look with high image sharpness.

For oppnåelse av høye lystettheter kan det til belegningsmidlene settes et fargende stoff, som dessuten kan velges således at det foregår en optisk tilpassing av avspeilings-sjiktet til underlagets farge. To achieve high light densities, a coloring substance can be added to the coating agents, which can also be chosen so that an optical adaptation of the reflection layer to the color of the substrate takes place.

Belegningsmidlene kan påføres på underlagene som skal av-speiles etter de vanlige tekniske fremgangsmåter, som eksempelvis ved dypping, fløting eller sprøyting. For bedre forarbeidelse kan belegningsmidlet dessuten tilsettes en silikonharpiksoppløsning. Ved oppvarming til eksempelvis 80-120°C oppstår avspeilingssjikt, som viser en utmerket refleksminsking under bibehold av bildeskarphet og en høy transmisjonsverdi. Dessuten er de bestandige ovenfor syrer, lut og mange organiske oppløsningsmidler, som aceton, xylen eller isopropanol, har antistatiske overflateegenskaper og er bestandige mot mekanisk slitasje. Sjiktene har normalt en tykkelse på 3-10 \ xm. The coating agents can be applied to the substrates to be reflected according to the usual technical methods, such as by dipping, floating or spraying. For better processing, the coating agent can also be added to a silicone resin solution. When heated to, for example, 80-120°C, a reflection layer is formed, which shows an excellent reduction in reflection while maintaining image sharpness and a high transmission value. In addition, they are resistant to acids, lye and many organic solvents, such as acetone, xylene or isopropanol, have antistatic surface properties and are resistant to mechanical wear. The layers normally have a thickness of 3-10 µm.

Følgende eksempler skal nærmere forklare belegningsmidlet ifølge oppfinnelsen: 1. I en kulemølle dispergeres en blanding av 129,75 vektdeler av en polysiloksanlakk ("Sicralan MRL"), 14,70 vektdeler av en termisk fremstilt kiselsyre ("TS 100") og 5,55 vektdeler hydrofobert kiselsyre ("Aerosil R 972") med ca. 400 g porselenskuler av ca. 1,5 cm diameter i 50 timer ved 90 opm til en pasta, som har en grindometerverdi <1 \ im. Av 9,5 vektdeler av denne pasta, 89,5 vektdeler polysiloksanlakk ("Sicralan MRL") og 1 vektdel av en oppløst silikonharpiks ("BYK 301") fremstilles med en vingerører (2000 opm) i 5 minutter en belegningsmasse, som påføres på glassklare akrylglasskiver ved Sypping, avluftes i 2-3 minutter og tørkes 60 minutter ved 80°C. S j ikttykkelsen utgjør 6 |im. The following examples will further explain the coating agent according to the invention: 1. In a ball mill, a mixture of 129.75 parts by weight of a polysiloxane varnish ("Sicralan MRL"), 14.70 parts by weight of a thermally produced silicic acid ("TS 100") and 5, 55 parts by weight hydrophobic silicic acid ("Aerosil R 972") with approx. 400 g porcelain balls of approx. 1.5 cm diameter for 50 hours at 90 rpm to a paste, which has a grindometer value <1 µm. From 9.5 parts by weight of this paste, 89.5 parts by weight of polysiloxane varnish ("Sicralan MRL") and 1 part by weight of a dissolved silicone resin ("BYK 301"), a coating mass is prepared with a vane stirrer (2000 rpm) for 5 minutes, which is applied to glass-clear acrylic glass discs at Sypping, vented for 2-3 minutes and dried for 60 minutes at 80°C. The screen thickness is 6 µm.

Tabell I viser noen egenskaper av slike belagte og ubelagte akrylglasskiver. 2. I den samme kulemølle som i eksempel 1 dispergeres en blanding av 114,3 vektdeler av polysiloksanlakk ("Sicrai lan MRL"), 25,95 vektdeler termisk fremstilt kiselsyre ("TT 600") og 9,75 vektdeler hydrofobert kiselsyre ("Aerosil R 972") i 40 timer med 60 opm til en pasta med én grindometerverdi <1 |am. 24,4 vektdeler av denne pasta blandes med 74,6 vektdeler av polysiloksanlakken og 1 vektdel av en silikonharpiksoppløsning. Table I shows some properties of such coated and uncoated acrylic glass sheets. 2. In the same ball mill as in example 1, a mixture of 114.3 parts by weight of polysiloxane lacquer ("Sicrai lan MRL"), 25.95 parts by weight of thermally produced silicic acid ("TT 600") and 9.75 parts by weight of hydrophobic silicic acid (" Aerosil R 972") for 40 hours at 60 rpm to a paste with one grindometer value <1 |am. 24.4 parts by weight of this paste are mixed with 74.6 parts by weight of the polysiloxane varnish and 1 part by weight of a silicone resin solution.

Med dette belegningsmiddel belegges et organisk glass på polykarbonatbasis og sjiktet tørkes 1 time ved 120°C. An organic polycarbonate-based glass is coated with this coating agent and the layer is dried for 1 hour at 120°C.

Tabell II viser noen egenskaper av slike belagte og ubelagte polykarbonatskiver, idet verdiene blésbestemt analogt tabell I. 3. I en kulemølle ifølge eksempel 1 og 2 dispergeres en blanding av 129,75 vektdeler polysiloksanlakk, 14,70 vektdeler av en termisk kiselsyre ("TK 900") og 5,55 vektdeler av en hydrofobert kiselsyre til en pasta, Table II shows some properties of such coated and uncoated polycarbonate discs, the values being determined analogously to Table I. 3. In a ball mill according to examples 1 and 2, a mixture of 129.75 parts by weight of polysiloxane lacquer, 14.70 parts by weight of a thermal silicic acid ("TK 900") and 5.55 parts by weight of a hydrophobic silicic acid to a paste,

16,0 vektdeler av denne pasta blandes med 84 vektdeler polysiloksanlakk og dette belegningsmiddel påføres etter homogenisering på akrylgalsskiver. 16.0 parts by weight of this paste are mixed with 84 parts by weight of polysiloxane varnish and this coating agent is applied after homogenization to acrylic gall discs.

Tabell III viser noen egenskapsverdier.Table III shows some property values.

4. Et belegningsmiddel av sammensetningen ifølge eksempel 1 påføres på et uroganisk glass og tørkes 60 minutter ved 110-120°C. Sjiktet har en gitter-snittkjenneverdi ifølge DIN 53151 på 1. 4. A coating agent of the composition according to example 1 is applied to an inorganic glass and dried for 60 minutes at 110-120°C. The layer has a lattice cut characteristic value according to DIN 53151 of 1.

Claims (8)

1. Belegningsmiddel "for. avspeilingssjikt på gjennomsiktige flater av glass og kunstoffer, spesielt for avspeilingssjikt på bildeskjermer, og bestående av en termisk herdbar lakk og et findelt pigment på kiselsyrebasis, karakterisert ved at det som lakk anvendes en polysiloksanlakk og som pigment en blanding av en termisk fremstilt kiselsyre og en hydrofobert termisk fremstilt kiselsyre.1. Coating agent "for. reflective layer on transparent surfaces of glass and plastics, especially for reflective layer on video screens, and consisting of a thermally curable varnish and a finely divided pigment on a silicic acid basis, characterized in that a polysiloxane varnish is used as varnish and as pigment a mixture of a thermally produced silicic acid and a hydrophobed thermally produced silicic acid. 2. Belegningsmiddel ifølge krav 1, karakterisert ved at polysilokanlakken inneholder hydrolyseprodukter av trialkyloksysilaner og/eller delkondensater av trisilanoler, oppløst i lavere alifatiske alkoholer og eventuelt kolloidalt silisiumdioksyd .2. Coating agent according to claim 1, characterized in that the polysiloxane varnish contains hydrolysis products of trialkyloxysilanes and/or partial condensates of trisilanols, dissolved in lower aliphatic alcohols and possibly colloidal silicon dioxide. 3. Belegningsmiddel ifølge krav 1 og 2, karakterisert ved at polysiloksan-lakkens faststoffinnhold ifølge DIN 53216 utgjør 20-30% og består av kolloidalt silisiumdioksyd og delkondensater av trisilanoler.3. Coating agent according to claims 1 and 2, characterized in that the solids content of the polysiloxane varnish according to DIN 53216 amounts to 20-30% and consists of colloidal silicon dioxide and partial condensates of trisilanols. 4. Belegningsmiddel ifølge et av kravene 1-3, karakterisert ved at som termisk fremstilt kiselsyre anvendes en i lysbuen ved ca. 3500°C eller ved fiammehydrolsye ved 550-1250°C fremstilt kiselsyre .4. Coating agent according to one of claims 1-3, characterized in that a thermally produced silicic acid is used in the arc at approx. 3500°C or by fiamme hydrolsie at 550-1250°C produced silicic acid. 5. Belegningsmiddel ifølge krav 1-4, karakterisert ved at kiselsyrene er tilstede tilsammen i mengder fira 0,5-15 vekt-% i lakken.5. Coating agent according to claims 1-4, characterized in that the silicic acids are present together in amounts of 0.5-15% by weight in the varnish. 6. Belegningsmiddel ifølge krav 1-5, karakterisert ved at den hydrofoberte termisk fremstilte kiselsyre utgjør 5-40% av den samlede kiselsyremengde.6. Coating agent according to claims 1-5, characterized in that the hydrophobized thermally produced silicic acid constitutes 5-40% of the total amount of silicic acid. 7. Belegningsmiddel ifølge krav 1-6, karakterisert ved at kiselsyren har en kornstørrelse ^ 1 |im.7. Coating agent according to claims 1-6, characterized in that the silicic acid has a grain size ^ 1 µm. 8 . Fremgangsmåte til.lf remstilling av belegningsmidler av polysiloksanlakker og termisk fremstilte kiselsyrer ifølge krav 1-7, karakterisert ved at kiselsyrene males med en del av lakken så lenge inntil den pastøse blandings kornethet målt med et grindometer har oppnådd en verdi på< 1 pm,og deretter blandes med resten av polysiloksanlakken.8 . Method for setting coating agents of polysiloxane varnishes and thermally produced silicic acids according to claims 1-7, characterized in that the silicic acids are ground with part of the varnish until the graininess of the pasty mixture measured with a grindometer has reached a value of < 1 pm, and then mixed with the rest of the polysiloxane varnish.
NO855059A 1985-02-06 1985-12-16 REFLECTIVE LAYER COATING METHOD AND PROCEDURE FOR ITS PREPARATION. NO855059L (en)

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DE3503957A DE3503957C1 (en) 1985-02-06 1985-02-06 Coating agent for anti-reflective coatings and process for its production

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CN (1) CN86101018A (en)
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KR900009035B1 (en) * 1986-09-19 1990-12-17 마쯔시다덴기산교 가부시기가이샤 Coating composition
CA2017090A1 (en) * 1990-05-17 1991-11-17 Stephen Dunn Coating composition
DE4122555A1 (en) * 1991-07-08 1993-01-14 Bayerische Motoren Werke Ag REAR VIEW MIRROR FOR MOTOR VEHICLES
DE4419574A1 (en) * 1994-06-03 1995-12-07 Bayer Ag Coating materials for waterproofing building materials, etc.
FR2750045B1 (en) 1996-06-19 1998-07-24 Oreal USE OF COLLOIDAL SILICIC ACID IN A NAIL VARNISH COMPOSITION

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US3986997A (en) * 1974-06-25 1976-10-19 Dow Corning Corporation Pigment-free coating compositions
DE3265777D1 (en) * 1981-05-08 1985-10-03 Toray Industries Coating composition
DE3203291C1 (en) * 1982-02-01 1983-04-14 Heiz, Therese, 6252 Dagmersellen Process for forming an anti-reflective coating on screens
AU562579B2 (en) * 1982-09-10 1987-06-11 Mitsubishi Rayon Company Limited Abrasion resistant delustering coating composition

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AU5280386A (en) 1986-08-14
JPS61183365A (en) 1986-08-16
BR8600449A (en) 1986-10-21
DD242873A5 (en) 1987-02-11
CN86101018A (en) 1986-08-06
AU574889B2 (en) 1988-07-14
ZA86306B (en) 1986-08-27
EP0193717A3 (en) 1987-08-19
ATE51644T1 (en) 1990-04-15
FI854980A0 (en) 1985-12-16
DK55686D0 (en) 1986-02-05
DE3670096D1 (en) 1990-05-10
ES8702472A1 (en) 1986-12-16
IN166367B (en) 1990-04-21
ES551655A0 (en) 1986-12-16
DE3503957C1 (en) 1986-10-09
FI854980A (en) 1986-08-07
EP0193717A2 (en) 1986-09-10
IL77613A (en) 1989-09-10
DK55686A (en) 1986-08-07
EP0193717B1 (en) 1990-04-04

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