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WO2001046752A1 - Joints d'etancheite de bord ameliores pour dispositifs electro-optiques - Google Patents

Joints d'etancheite de bord ameliores pour dispositifs electro-optiques Download PDF

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Publication number
WO2001046752A1
WO2001046752A1 PCT/US2000/034715 US0034715W WO0146752A1 WO 2001046752 A1 WO2001046752 A1 WO 2001046752A1 US 0034715 W US0034715 W US 0034715W WO 0146752 A1 WO0146752 A1 WO 0146752A1
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WIPO (PCT)
Prior art keywords
mica
platelet
lens
ion
peripheral edge
Prior art date
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/US2000/034715
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English (en)
Inventor
Carol A. Knox
Jerome A. SIENER
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PPG Industries Ohio Inc
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PPG Industries Ohio Inc
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Filing date
Publication date
Application filed by PPG Industries Ohio Inc filed Critical PPG Industries Ohio Inc
Priority to AU22836/01A priority Critical patent/AU2283601A/en
Publication of WO2001046752A1 publication Critical patent/WO2001046752A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/161—Gaskets; Spacers; Sealing of cells; Filling or closing of cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells

Definitions

  • This invention relates to the use of improved edge seal compositions containing platele -type fillers in the manufacture of electrooptic devices, and to the resulting sealed devices.
  • Variable transmission electrooptic devices including, but not limited to, laminated electrochromic and liquid crystal devices, are described in the art.
  • the optical properties of electrochromic materials change in response to electrically driven changes in oxidation state.
  • Liquid crystal devices can also be used to regulate light transmission or other optical properties in response to applied voltage.
  • peripheral edge seals are necessary.
  • a typical laminated electrochromic device such as an electrochromic lens, comprises a first electroconductive material layer, which layer serves as a first electrode, an electrochromic layer, an ion-conducting material layer and a second electroconductive layer which serves as a second electrode.
  • a complementary electrochromic layer is also used.
  • These electroconductive and electrochromic layers, along with the ion-conducting material layer can be arranged as a single stack deposited on a first substrate or lens which is then laminated to a second substrate or lens, or they can be arranged such that the electrodes are coated on separate substrates or lenses, followed by placement on the substrates or lenses of one or more electrochromic layers.
  • the coated substrates or lenses are then laminated via a technique which positions an ion-conducting material between the coated lenses.
  • an ion-conducting polymer which also serves as a bonding agent, is used to bond the complementary lenses.
  • an electrochromic film such as tungsten oxide is deposited on a substrate coated with an electroconductive film such as tin oxide or indium tin oxide to form one electrode.
  • the counter electrode is typically a similar tin oxide or indium tin oxide coated substrate.
  • the peripheral edge surface of the ion-conducting material layer generally must be sealed so as to maintain its water content within a range sufficient to provide required ion conductivity. Absent an adequate seal, moisture loss or gain through the exposed edge of the ion- conducting material layer impacts performance.
  • the peripheral edge surface of a laminated electrooptic device may be shaped to support or interlock with an edge seal. See, for example, commonly owned U.S. Pat. No. 5,953,150, which discloses a nubbed-edge design that facilitates application of an edge seal to the peripheral edge surface of an electrooptic device.
  • Commonly owned U.S. Pat. No. 5,969,847 also discloses a method for sealing an electrooptic device, as do copending and commonly owned U.S. Pat. Application Nos . 09/046,386 and 09/190,710, filed on March 23, 1998, and November 15, 1998, respectively.
  • Copending and commonly assigned U.S. Pat. Application No. 09/211,786, filed December 15, 1998 discloses improved epoxy edge seals for electrooptic devices.
  • U.S. Pat. No. 5,327,281 to Cogan discloses the use of epoxy to seal a cavity formed when a spacer is used to separate electrodes and contain a liquid electrolyte injected between the spaced electrodes.
  • EP 0 855 615 A2 discloses an electrochromic device wherein the periphery of the substrates forming the device, other than where an injection port is located, is sealed with a sealant.
  • the instant invention is directed to the use of improved sealant compositions containing platelet-type fillers to seal the peripheral edge surfaces of electrooptic devices. More particularly, a sealant composition, preferably an epoxy sealant composition, containing an effective amount of a platelet-type filler, is applied as a moisture seal to the peripheral edge surface of a laminated electrooptic device, such as a liquid crystal or electrochromic lens, display, window, sunroof or mirror, having a peripheral edge surface prone to moisture gain or loss .
  • a sealant composition preferably an epoxy sealant composition, containing an effective amount of a platelet-type filler
  • the instant invention is directed to an electrooptic device, preferably an electrochromic device, having a peripheral edge seal containing an effective amount of a platelet-type filler.
  • an electrooptic device preferably an electrochromic device, having a peripheral edge seal containing an effective amount of a platelet-type filler.
  • the improved seal of the instant invention preferably contacts the exposed outer edge of the ICP layer, which enables the water content of the ICP layer to be maintained within a suitable range. This in turn helps to maintain ion-mobility and device operability.
  • the instant invention is directed to a method for sealing the peripheral edge surface of a laminated electrooptic device, said method comprising: a) applying an effective amount of a sealant composition to said peripheral edge surface, wherein said sealant composition contains an effective amount of a platelet-type filler; and b) allowing said sealant composition to cure, if necessary.
  • the instant invention is further directed to a method for sealing all or a portion of the peripheral edge surface of a laminated electrochromic device, said peripheral edge surface comprising the outer peripheral surfaces of first and second mated substrates, preferably first and second lenses, and the outer peripheral surface of a layer to be sealed, such as a bonding layer, preferably an ion-conducting polymer (ICP) layer, wherein the outer peripheral surface of said layer to be sealed is situated between the outer peripheral surfaces of said first and second substrates .
  • This method comprises applying an effective amount of a sealant composition containing an effective amount of a platelet-type filler to the peripheral edge surface to be sealed.
  • the instant invention is directed to a laminated electrooptic device which, absent an edge seal, is sensitive to moisture gain or loss through its peripheral edge.
  • a laminated electrooptic device which, absent an edge seal, is sensitive to moisture gain or loss through its peripheral edge.
  • a device typically has a material capable of absorbing or desorbing water, such as an ion- conducting polymer, disposed between a first substrate and a second substrate, and contains a peripheral edge seal having a platelet-type filler incorporated therein.
  • this seal is an epoxy seal which is in contact with the outer peripheral surface of the material sensitive to moisture gain or loss.
  • the instant invention is also directed to a laminated electrochromic lens comprising a first coated lens, a second lens which may or may not be coated and an ion- conducting polymer (ICP) layer which is disposed between said first and second lenses, said laminated electrochromic lens having a peripheral edge region prone to moisture gain or loss through the outer surface of said ion-conducting polymer layer, wherein said peripheral edge region contains a seal prepared from an admixture of a sealant and an effective amount of a platelet-type filler.
  • ICP ion- conducting polymer
  • sealant and “sealant composition” refer to any type of sealant or sealant composition that can be applied to the peripheral edge surface of an electrooptic device and that is compatible with one or more platelet-type fillers.
  • suitable sealants include, but are not limited to, epoxies, acrylates, silicons, urethanes, and melamines .
  • a suitable sealant is combined with a platelet-type filler via a conventional mixing technique, and an effective amount of the resulting admixture is applied to the peripheral edge surface to be sealed via a suitable application means.
  • the sealant/filler admixture is preferably applied over and contacts the ICP layer on the peripheral edge surface of the lens, thereby impeding moisture ingress/egress to/from the ICP layer.
  • Epoxies are preferred sealants due to their cure and adhesion properties.
  • a conventional epoxy resin is combined with a curing agent and a platelet-type filler via a conventional mixing technique.
  • preferred edge seals are prepared by: a) combining an epoxy resin, a suitable curing agent and an effective amount of a platele - type filler to form a sealant admixture; and b) applying an effective amount of said admixture to the surface to be sealed.
  • Suitable epoxy resins include, but are not limited to, bisphenol A-based resins, halogenated bisphenol A-based resins, phenol and cresol epoxy novalac resins, glycidyl ethers of phenol-aldehyde adducts, glycidyl ethers of phenol- hydrocarbon novalacs, heterocyclic glycidyl imides and amides, cycloaliphatic epoxy resins and aromatic and heterocylic glycidyl amine resins.
  • More preferred resins are aromatic glycidyl amine resins represented by formula (I) :
  • R 2 is phenylene or naphthylene
  • X is N, NR 3 , CH2N
  • R 3 is an alkyl group containing
  • Reaction of an epoxy resin with a suitable curing agent leads to formation of a crosslinked or thermoset epoxy sealant.
  • Any suitable curing agent can be used.
  • the term "curing agent” refers to a compound which effects conversion of an epoxy resin to an epoxide polymer, which in turn is used to seal the peripheral edge surface of an electrooptic device.
  • Manich-base curing agents such as aliphatic polyamines can be used.
  • Suitable aliphatic polyamines include, but are not limited to, diethylene triamine and tetraethylene triamine, which are low viscosity liquids that are known to react with various epoxy resins at ambient temperatures. Aliphatic diamines based on propylene oxide and ammonia can also be used. For aromatic glycidyl amine resins, preferred curing agents are modified aliphatic amines such as Ancamine® 1856, which is commercially available from Air Products and Chemicals, Inc. An effective amount of a suitable curing agent is used.
  • the term "effective amount" refers to that quantity of curing agent necessary to form a cured epoxy seal within a reasonable time (e.g., less than about two (2) hours) , at a temperature less than about 50° C, when combined with a given epoxy resin.
  • suitable curing agent: epoxy resin weight ratios can be determined stoichometrically by skilled practitioners, or by following manufacturers' instructions. For example, if a polyamine curing agent is used, the approximate amount of amine curing agent needed to react completely with a given epoxy resin having a predetermined epoxy equivalent mass can be calculated by dividing the molecular mass of the amine by the number of reactive hydrogens. Adjustments may be necessary due to steric and diffusional effects.
  • a curing agent and an epoxy resin can be combined via any conventional technique.
  • the resin and curing agent can be held in separate containers which exit into a common conduit or chamber, wherein mixing occurs.
  • the resin and curing agent can be applied separately to a substrate or container, and mixed in situ.
  • Resin/curing agent admixtures can also contain effective amounts of other constituents, including, for example, fillers, solvents, diluents, plasticizers , accelerators, curatives, and tougheners . Addition of such agents is well within the purview of skilled practitioners.
  • an effective amount of a platelet-type filler is added to the sealant composition prior to application of the sealant composition to an electrooptic device.
  • the term "effective amount" refers to an amount of filler which can be dispersed in a given sealant and which provides improved moisture barrier properties.
  • at least about 0.1%, by weight, based on the total weight of the sealant is added. More preferably, at least about 1% by weight is added, up to the weight percent that can be dispersed into a given sealed composition. Weight percents ranging from about 5 to about 30 percentage are generally suitable.
  • any platelet-type filler which is compatible with the sealant being used and which impedes moisture transport through the sealant is suitable.
  • Preferred fillers are pigments having high aspect ratios, i.e., aspect ratios greater than about 20, preferably ranging from about 50 to about 100, which decrease the moisture permeability of a given sealing material.
  • suitable fillers include: micas, vermiculite, clays, talcs, micaeous iron oxide, silicas, flaked metals, graphite flakes, glass flakes, phthalocyanine flakes, and the like.
  • the preferred fillers for the purposes of this invention are micas.
  • Micas which can be used when practicing the instant invention include natural micas and synthetic micas.
  • natural micas include: muscovite KAl 2Si3O10 (OH) 2 H2O, phlogopite (K 2 (Mg, Fe 2+ ) 6 (Al 2 Si 6 O 20 ) (OH, F) 4 ) , and bi ⁇ tite (K 2 (Mg,Fe 2+ ) 6 (Al 2 Si 6 O 20 ) (OH) 4 ) .
  • Examples of synthetic micas include: fluorophlogopite (K 2 MggAl2SigO 20 F 4 ) and barium disilicic (Ba 2 Mg 6 Al 2 Si 6 O 0 F 4 ) .
  • Wet and dry ground micas are suitable. Of these micas, the preferred is muscovite mica. Wet and dry ground muscovite mica, C.A.S. No. 12001-26-2, is commercially available from Franklin Industrial Minerals.
  • Surface-modified micas including micas treated with one or more silane coupling agents, are more preferred.
  • Examples of such products are admixtures of a mica and an epoxy silane.
  • silane When the silane is absorbed onto the mica, it reacts with surface moisture to produce an alcohol and a silane polymer. Subsequent processing removes the volatile alcohol from the silane-coated mica surface.
  • a preferred modified mica is muscovite mica treated with 3-glycidoxy propylene methoxysilane. This product is commercially available from Franklin Industrial Minerals as L-140-SM-E.
  • the resin/curing agent/filler or sealant/filler admixtures described herein can be applied to a laminated electrooptic device via any suitable application technique, including, for example, by dipping, brushing, swabbing or extrusion techniques or by the molding technique of co-pending and commonly assigned U.S. Patent Application Serial No. 09/046,385, which is incorporated herein by reference. Also, the edge seal application techniques of co-pending and commonly assigned U.S. patent application Serial Nos . 09/046,386 and 09/190,710 and of U.S. Pat. No. 5,969,847, which are also incorporated herein by reference, can be used. An effective amount of a sealing composition is applied, i.e., an amount sufficient to provide a seal of desired thickness over the desired portion of a given peripheral edge surface.
  • the electrooptic devices contemplated by this invention include, but are not limited to, eyewear, window, sunroof, skylight, display and mirror devices which have utility in various optical, automotive, architectural and aircraft applications .
  • Preferred devices are electrochromic devices which contain an ion-conducting material layer disposed between mated first and second substrates .
  • Various ion-conduc ing materials can be used, including for example, materials comprising hydrogen uranyl phosphate or polyethylene oxide/ LiC10 4 .
  • ion-conducting polymer electrolytes or inorganic films such as LiNb0 3 , LiBo 3 , LiTa0 3 , LiF, Ta 2 0 5 , Na 2 AlF 6 , Sb 2 0 5 nH 2 0 + Sb 2 0 3 , Na 2 0 11A1 2 0 3 , MgF 2 , Zr0 2 , Nb 2 0 5 and Al 2 0 3 can be used as the ion-conducting material.
  • Preferred ion-conducting materials are ion-conducting polymers; these polymers generally serve the dual functions of being ion- conducting electrolytes and mechanical adhesives.
  • ion-conducting materials includes ion-containing polymers known as ionomers . These macromolecules contain ionizable groups covalently linked to a polymer chain, typically a hydrocarbon. Polystyrene sulfonic acid and poly (2-acrylamido-2-methyl-l-propanesulfonic acid) are examples of ionomers, both incorporating the protonic acid S0 3 H group on the polymer chain. Ionomers are generally formed by polymerizing monomers bearing both an ionizable group and an ethylenic, e.g. vinylic, group.
  • the ion-conducting polymer electrolyte is a proton-conducting polymer selected from the group consisting of homopolymers of 2-acrylamido-2-methylpropanesulfonic acid (AMPSA) and copolymers of AMPSA with various monomers .
  • AMPSA 2-acrylamido-2-methylpropanesulfonic acid
  • Such polymers may be utilized in the form of preformed sheets which are laminated between the substrates, or in the form of liquid reaction mixtures of monomers which are cast and cured in place between the substrates.
  • a preferred proton-conducting polymer electrolyte in accordance with the present invention is a copolymer of AMPSA and N,N-dimethylacrylamide (DMA) , preferably cast and cured in place.
  • DMA N,N-dimethylacrylamide
  • More preferred copolymers of AMPSA and DMA are prepared from AMPSA and DMA monomers in a molar ratio range of about 1:3 to 1:2.
  • the thickness of the polymer electrolyte is not believed to be critical but in general is in the range of 0.001 to 0.025 inch (0.0254 to 0.625 millimeter) .
  • the first and second substrates of the instant laminated electrochromic devices are generally glass and/or organic polymeric substrates conventionally used to prepare electrochromic articles or devices.
  • polymeric organic substrates are used.
  • Substrates to which the platelet-type filler-containing sealants of the present invention can be applied are preferably prepared from transparent materials suitable for producing eyewear lenses, such as lenses prepared from synthetic organic optical resins. Alternatively, non-transparent substrates can be used.
  • Suitable transparent lenses may have a conventional refractive index (1.48-1.5), a relatively high refractive index (1.60-1.75), or a mid-range refractive index (1.51- 1.59), depending on the end use.
  • a transparent lens may have a refractive index within the range of between 1.40 and 1.80.
  • Synthetic polymer substrates that may be used as a lens material include, but are not limited to: thermoplastic polycarbonates, such as the carbonate- linked resin derived from bisphenol A and phosgene, which is sold under the trademark LEXAN®; polyesters, such as the material sold under the trademark, MYLAR®; poly (methylmethacrylates) , such as the material sold under the trademark, PLEXIGLAS®; and polymerizates of a polyol (allyl carbonate) monomer, especially diethylene glycol bis (allyl carbonate), which is sold under the trademark CR-39®. Copolymers of the aforedescribed monomers/resins may also be used as a lens material.
  • thermoplastic polycarbonates such as the carbonate- linked resin derived from bisphenol A and phosgene, which is sold under the trademark LEXAN®
  • polyesters such as the material sold under the trademark, MYLAR®
  • poly (methylmethacrylates) such as the material sold under the trademark, PLEX
  • a cathodically coloring electrochromic material usually tungsten oxide or compounds thereof, is deposited at a thickness of about 800 to 5,000 Angstroms on a transparent substrate that has been previously coated with an electroconductive metal oxide film, such as tin oxide or indium tin oxide (ITO) , which electroconductive film serves as one electrode.
  • an electroconductive metal oxide film such as tin oxide or indium tin oxide (ITO)
  • the electroconductive film comprises indium and tin at a weight ratio of about 90:10.
  • the film thickness is preferably in the range of 800 to 4,000 Angstroms for acceptable conductivity.
  • the electroconductive and electrochromic films may be deposited by a variety of methods so long as the substrate is not deleteriously affected.
  • the adhesion of an electroconductive metal oxide film directly to a plastic substrate may be improved by application of a primer to said substrate prior to coating. See, for example, U.S. Patent No. 5,471,338 to Yu, Backfisch and Rukavina .
  • the counter electrode can be prepared by depositing a similar metal oxide coating on a second transparent substrate, with or without a complementary electrochromic film.
  • a suitable complementary electrochromic film is a nitrogen-containing iridium oxide film as disclosed in U.S. Patent No. 5,618,390, to Yu, Backfisch et al .
  • the ion-conducting material is then disposed between substrates so coated; in the case of ion-conductive polymers, a precursor composition is generally cured or polymerized in situ by energy which passes through a substrate coated with an electroconductive film and/or an electrochromic film.
  • Lamination of electrochromic lenses can be accomplished by placing a curable ion-conducting polymer composition, i.e.
  • the curable ICP composition is then cured via exposure to a suitable energy source. Curing of the polymer places an ion- conducting polymer between the lenses while bonding the lenses into a laminate, thereby facilitating necessary ion flow.
  • the laminated electrochromic device preferably an electrochromic eyewear lens
  • the laminated electrochromic device comprises an ion-conducting material, preferably an ion-conducting polymer, sandwiched between suitably coated substrates. Absent an edge seal, the ion-conducting material is exposed to the environment along the edge of the laminate. To reduce moisture transfer into or out of this layer, the edge of the lens must be sealed, preferably by applying an epoxy which contains a platelet-type filler such as mica to the edge.
  • These sealing compositions are exceptional moisture barriers and generally have acceptable adherence characteristics.
  • the cross-sectional profile of the instant edge seals generally conforms to the shape of the depression, groove or nub present on the device edge being sealed.
  • the profile of the device edge is not believed to be critical. Nubbed edges are preferred because they are easily formed using a beveled edger on one or each of the substrates forming a matched laminated pair. In the case of electrochromic lenses, the profile of the seal should not interfere with attachment of the lenses to a suitable frame.
  • Tetrad® X is N,N,N' ,N' -tetraglyglycidyl-m-xylenediamine, commercially available from Mitsubishi Gas Chemical Company.
  • EPON® 880, 8132 and 828 are bisphenol A-based (DGEBA) epoxy resins, commercially available from Shell Chemical
  • Ancamide® 2353 is a modified polyamide curing agent (typical viscosity: 3000 cps @ 77° F) , commercially available from Air Products and Chemicals, Inc.
  • Ancamine® 2205 is an accelerated aliphatic amine curing agent (typical viscosity: 3600 cps @ 77° F) , commercially available from Air Products and Chemicals, Inc.
  • Ancamine 1895 is a cycloaliphatic amine adduct curing agent
  • Ancamine 1856 is a modified aliphatic amine curing agent
  • Ancamine 2432 is a modified aliphatic amine curing agent (typical viscosity: 300 cps @ 77° F) , commercially available from Air Products and Chemicals, Inc.
  • Epicure® 3235 is an epoxy curing agent, commercially available from Shell Chemical Company.
  • HiSIL® T 700 and 303 are silicas, commercially available from PPG Industries, Inc.
  • TETA is a triethylenetetramine (curing agent) , commercially available from Aldrich Chemical Company.
  • Mica is muscovite mica, commercially available from Franklin Industrial Minerals, unless otherwise indicated.
  • L-140-SM-E is surface modified mica, commercially available from Franklin Industrial Minerals.
  • EXAMPLE 1 MICA DISPERSION INTO AN EPOXY
  • a mica-containing epoxy sealant composition suitable for use as an electrooptic device edge seal was prepared as follows : Part A - Resin Preparation
  • Tetrad X 258 grams was added to a 1.0 liter Pyrex® reaction kettle having a top containing a vacuum stirrer bearing, vacuum thermometer holder and vacuum takeoff joint.
  • 57 grams of surface modified mica L-140-SM-E was added to a disposable container.
  • the reaction kettle, without its top, was placed in a heating mantle and a Variac® potentiometer was set to maintain Part A below 35° C.
  • a mixing blade was then inserted into the Tetrad X, and mixing at approximately 190 rpm commenced.
  • the surface modified mica was slowly added with a scoop. After all of the surface modified mica was added, mixing continued for 15 minutes.
  • Parts A and B can be mixed via conventional techniques and applied to a device edge via conventional application techniques.
  • the initial water content of each flat was then determined via a near infrared (NIR) technique using a Braker IFS 66/S analyzer. Water content values were determined based on both 5250 cm "1 band areas and 5250/5800 band ratios.
  • NIR near infrared
  • the epoxy sealed flats were next placed into a QUV accelerated weather tester for three (3) days at 50° C and 98% relative humidity. Final water contents were then determined using the above desired NIR technique. Results showing the impact of various seals on water ingress to the flats appear in Table I .
  • Example 14-23 the procedure of Examples 2-13 was followed, using various mica concentrations.
  • the resin: curing agent weight ratio (active basis) was 5:3.3; in Examples 19-23, the resin: curing agent weight ratio was 1:1. Results are shown in Tables II and III.
  • the peripheral edge of a laminated electrochromic lens having a circumferential edge nub aligned with its ion- conducting polymer layer was sealed as follows: Tetrad X and Ancamine 1856 admixtures each containing 20%, by weight, mica, were fed through the inline mixer of an epoxy dispenser and the resulting 5:3.3 w/w epoxy composition was applied via the molding technique of U.S. Pat. Application No. 09/046,386.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Sealing Material Composition (AREA)

Abstract

L'invention concerne un procédé permettant de rendre étanche la surface de bord périphérique d'un dispositif électro-optique, dans lequel une composition d'agent d'étanchéité contenant une charge de type plaquettes est appliquée au dispositif. Les dispositifs étanches sont également décrits.
PCT/US2000/034715 1999-12-23 2000-12-20 Joints d'etancheite de bord ameliores pour dispositifs electro-optiques Ceased WO2001046752A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU22836/01A AU2283601A (en) 1999-12-23 2000-12-20 Improved edge seal for electrooptic devices

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US47131699A 1999-12-23 1999-12-23
US09/471,316 1999-12-23

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WO2001046752A1 true WO2001046752A1 (fr) 2001-06-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015021201A1 (fr) * 2013-08-08 2015-02-12 Dow Global Technologies Llc Matériau composite, articles fabriqués à partir de celui-ci
WO2016056560A1 (fr) * 2014-10-08 2016-04-14 積水化学工業株式会社 Agent de scellement pour procédés de dépôt en gouttes de cristaux liquides, matériau verticalement conducteur, et élément d'affichage à cristaux liquides

Citations (4)

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WO1998044386A1 (fr) * 1997-04-02 1998-10-08 Gentex Corporation Retroviseur electrochromique comportant deux elements en verre mince et un support electrochromique gelifie
WO1999048687A1 (fr) * 1998-03-23 1999-09-30 Ppg Industries Ohio, Inc. Procede de stratification d'un dispositif composite
WO1999049352A1 (fr) * 1998-03-23 1999-09-30 Ppg Industries Ohio, Inc. Procede d'application d'une fiche et d'une barre omnibus
JPH11305243A (ja) * 1998-04-16 1999-11-05 Internatl Business Mach Corp <Ibm> 液晶表示装置

Patent Citations (5)

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WO2015021201A1 (fr) * 2013-08-08 2015-02-12 Dow Global Technologies Llc Matériau composite, articles fabriqués à partir de celui-ci
WO2016056560A1 (fr) * 2014-10-08 2016-04-14 積水化学工業株式会社 Agent de scellement pour procédés de dépôt en gouttes de cristaux liquides, matériau verticalement conducteur, et élément d'affichage à cristaux liquides
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JPWO2016056560A1 (ja) * 2014-10-08 2017-07-27 積水化学工業株式会社 液晶滴下工法用シール剤、上下導通材料、及び、液晶表示素子

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