WO1999064899A9 - Low reflective films - Google Patents
Low reflective filmsInfo
- Publication number
- WO1999064899A9 WO1999064899A9 PCT/US1999/012889 US9912889W WO9964899A9 WO 1999064899 A9 WO1999064899 A9 WO 1999064899A9 US 9912889 W US9912889 W US 9912889W WO 9964899 A9 WO9964899 A9 WO 9964899A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- polymeric
- film
- refractive index
- transparent
- Prior art date
Links
Classifications
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- 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
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
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- 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
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- 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
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- 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
- C08K5/00—Use of organic ingredients
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/111—Anti-reflection coatings using layers comprising organic materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
- Y10T428/24967—Absolute thicknesses specified
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
- Y10T428/24967—Absolute thicknesses specified
- Y10T428/24975—No layer or component greater than 5 mils thick
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
- Y10T428/257—Iron oxide or aluminum oxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/261—In terms of molecular thickness or light wave length
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31652—Of asbestos
- Y10T428/31663—As siloxane, silicone or silane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
Definitions
- This invention relates to low reflective transparent polymeric films.
- the transparency of windows, show cases, glass, viewers or video screens can be effected by glare, reflective light sources, or the reflection of surrounding scenery.
- anti-reflective coatings have been developed which are typically applied to a surface by vapour deposition or sputtering methods.
- US Patent 4687707 Another method for depositing anti reflective coatings is disclosed in US Patent 4687707 in which the coating is formed from a thin layer of a reaction product containing a metal oxide e.g. Si0 2 or Ti0 . Such a product results from the condensation of titaniux tetra-alkoxides, titanium chelates or tetraalkoxy silanes. To this layer, is added a second layer of a condensation product containing a fluorine compound such as fluorine containing silane compounds. This multi layer construction bringing about an improvement in the reduction of reflectance.
- US Patent 4966812 discloses the deposition of a low refractive index anti- reflective coating on plastics material using sol-gel techniques.
- US Patent 5109080 discloses a high refractive index ceramic/polymer material which is made from a sol-gel synthesis of a metal alkoxide with an alkoxysilane-capped poly(arylene ether) polymeric component.
- EP 0166363 discloses the use of at least two thin layers as a low reflective coating, a first layer containing metal oxide and having a refractive index in the range of 1.65-2.10, and a second over layer comprising a fluorine-containing silicon compound making a low refractive index having a refractive index of about 1.4.
- the present invention provides a transparent polymeric film having an anti- reflective coating, the coating being a novel coating.
- an anti-reflective film comprising a transparent polymeric film substrate coated with at least two polymeric layers, the two layers being an exposed outer polymeric layer comprising a fluorine containing polymer and an inner organometallic reflective layer adjacent the exposed layer and comprising the condensation product of a metal alkoxide and a polymer reactive with the metal alkoxide.
- the inner organometallic polymeric layer has a refractive index of at least 1.6, more preferably 1.7 and the outer layer has a refractive index not greater than 1.45, and preferably not greater than 1.4.
- an anti-reflective film comprising a transparent polymeric film substrate, an exposed outer polymeric layer comprising fluorine containing polymers having a refractive index not greater than 1.45 and a thickness in the order of l A wavelength, and an inner polymeric layer adjacent the exposed outer layer containing metal oxide and having a refractive index of at least about 1.6 and a thickness of about V ⁇ wavelength.
- the polymeric film may comprise at least one of cellulose acetate, polyamide, acrylic, polyester, and polycarbonate films.
- the inner polymeric layer comprises the reaction product of a titanium alkoxide, preferably titanium isopropoxide, and a silane containing polymer which can undergo the sol-gel reaction.
- Suitable polymers are ⁇ ⁇ dihydroxypolysiloxanes poly(methyl phenyl siloxane), poly (dimethylsiloxane), and silane modified polyesters.
- the second layer is a fluorine containing polymer which is crosslinkable, preferably using one of the known curing techniques for example ultra violet light, thermal cure, electron beam, free radical and cationic initiation.
- the fluorine containing polymer is an acrylate, conveniently an acrylate modified perfluoropolyether.
- the fluorine containing polymer may be a vinyl ether which is crosslinked by a cationic initiator.
- the invention also provides a method of manufacture of an anti reflective film in which method fine particles of metal oxide are dispersed in a liquid polymeric material, and the liquid polymeric material is coated onto a polymeric film substrate and cured to give a transparent inner polymeric layer having a refractive index of at least about 1.60 and a thickness of about l ⁇ wavelength, and the inner polymeric layer is overcoated by an outer polymeric layer of fluorine containing polymer which is cured to give an exposed outer polymeric layer having a refractive index no greater than 1.45 and a thickness of substantially 1/4 wavelength.
- the invention also provides a further method of manufacture of an anti-reflective film in which method a reaction mixture of a metal alkoxide and a silane modified polymer is coated onto a transparent film substrate and cured to form an inner polymeric layer, and a second layer of a fluorine containing polymer is coated over the inner layer, and is cured to form an exposed outer polymeric layer.
- the outer layer can be coated onto the inner layer by either vacuum deposition, or by overcoating the inner layer with a solution of the fluorine containing polymer, followed by removal of the solvent.
- the first layer is a reaction mixture of a metal alkoxide and a silane modified polyester, and the mixture is cured at 180°C for at least one minute to form said inner layer
- the outer layer is a fluorine containing polymer which is coated over the inner layer directly in contact therewith.
- the outer layer is curable on exposure to ultra violet light.
- the metal alkoxide is a titanium or zirconium alkoxide.
- a silane coupling agent preferably a carbodiimide functional silane
- the inner polymeric layer may be formed from polymerisable monomers such as acrylates, methacrylates, vinyl ether, epoxies, or other monomers containing unsaturated bonds, or from a mixture of polymerisable monomers preferably a triacrylate, or a tetraacrylate and acrylic acid and photo initiators into which fine metal mineral powder is dispersed.
- the mineral powder is a colour imparting powder such as a metal oxide, and the particles are sufficiently small that the layer is transparent.
- the metal oxide is an iron oxide, preferably haematite which has been ground to a particle size having an average equivalent diameter of less than 100 nm (100 x 10 "9 m) and preferably less than 50 nm (50 x 10 "9 m)
- the invention also relates to a method of making a multi layer anti reflective polymeric film comprising a polymer film substrate and having as one of its layers a layer comprising particles of metal oxide, preferably iron oxide, dispersed in a curable polymeric resin, the particles having an average equivalent diameter of less than 100 x 10 "9 m.
- the presence of the metal oxide powder especially coloured powder, such as iron oxide colours the polymer film layer which absorbs some light and thereby reduces reflection to give an improved anti-reflectance.
- a dye may be added to the film substrate or other layer to produce an overall neutral colour e.g. grey by the addition of blue and red dyes to the polyester substrate.
- the refractive index may be varied by varying the content of iron oxide present in the polymeric coating.
- the iron oxide may comprise up to 85% by weight of the coating but preferably comprises 25-70% by weight of the coating and more preferably 40-55% by weight.
- a further method of making a multi-layer anti-reflective film in which a polymeric film substrate is coated with a transparent polymer layer containing inorganic powdered material dispersed within the layer, the powder particles have a high refractive index of greater than 2.6, the film having a haze value of less than 20%.
- the haze value will be dependant upon several features including particle size. Preferably the particle size does not exceed 50 nm.
- the film haze is measured in accordance with ASTMS D 1003-61 using a HazeGard Plus hazemeter catalogue number 4725 available from BYK Gardner Inc. of Silver Spring, Maryland.
- the haze value does not exceed 5%, and more preferably does not exceed 3%.
- an anti-reflective film in which a polymeric film substrate is coated with at least one transparent polymer layer containing inorganic powdered material dispersed within the layer and forming a coloured film, having a refractive index of at least 1.6.
- the inorganic powders are coloured powders particularly metal compounds.
- Suitable inorganic powders include the following: — Lead oxide Ferric oxide
- Fig 1 is a schematic cross-sectional drawing of a film laminate according to the present invention.
- Fig 2 is a schematic cross-sectional drawing of a second film laminate according to the invention.
- a transparent polymeric film 11 of the type sold for adhering to the window glass of building, automobiles, display cases, screens etc.
- the preferred polymeric film is polyester film, preferably polyethylene tetraphthalate (PET) which is about 25 microns in thickness.
- PET film 11 has a refractive index of between 1.63-1.67, generally about 1.65.
- the polyester film 11 is then optionally coated with a hard abrasion resistant coating 12. Details of the coating 12 and its method of application are described in US 4557980 the contents of which are hereby incorporated into the present description by reference.
- the abrasion resistant coating 12 is a mixture of polymerisable monomers including triacrylate or a terra acrylate and acrylic acid and photoinitiators, which is applied to the film by any suitable method, preferably by direct gravure, and polymerised by UN radiation to cure the acrylic coating.
- the coating 12 is about 4 ⁇ m (microns) in thickness and has a refractive index of about 1.52.
- the PET film 11 and optionally the abrasion resistant layer 12 are in turn coated in anti-reflective layers 13.
- the anti -reflective layers 13 comprise a first inner high refractive index ceromer layer 14 about 80 nm thick containing metal oxide particles, and a second outer lower refractive index polymeric layer 15 about 90-100 nm thick.
- the outer layer 15 is exposed to the air and is formed from a fluorine containing polymer.
- the metal oxide ceromer may be formed by an condensation reaction between a metal alkoxide and a polyester containing silane groups.
- the preferred metal oxides are Titanium and Zirconium Dioxides, more preferably Titanium Dioxide, formed from the gel reaction between titanium isopropoxide and a polymer having silane groups.
- the polymer is a polyester having silane groups, preferably at at least one end of the polymer chain.
- the preferred polyesters are Morton Adcote 89R3 and Morton Adcote 89R1 and are of the type described in US Patent 4408021, and its continuation-in-part US 4429005.
- the titanium isopropoxide and the silane functional polyester groups condense to form a Ti0 2 /polymer ceramer.
- the refractive index of the first polymeric layer 14 (ceramer) is determined by the relative amounts of Titanium dioxide and polymer present. The higher refractive index values being given by greater proportions of Titanium Dioxide being present. However, the properties of the layer 14 are a compromise between having a high refractive index value and good flexibility, so that the layer 14 adheres to, and flexes with the PET film 11.
- the ratio of Titanium isopropoxide: silane modified polyester should be between 60:40 and 40:60 by weight respectively, preferably 50:50.
- the sol-gel reaction mixture is dissolved in methyl ethyl ketone (MEK) to give an 8% solid solution which is coated on the film 11 or abrasive resistant coating 12 by reverse gravure printing using a 360 QCH gravure cylinder.
- MEK methyl ethyl ketone
- the film passes through an oven at 180°C with a residence time of 1 min to partially cure the sol-gel coating.
- Alternative silane substituted polymers may include polydimethyl siloxane, alkoxysilanes, and polyesters having silane groups partially substituted for the hydroxy groups.
- a silane coupling agent preferably a carbodiimide functional silane (available from Zeneca) as a cross-linking agent for reaction with the metal alkoxide.
- a silane coupling agent preferably a carbodiimide functional silane (available from Zeneca)
- Zeneca a carbodiimide functional silane
- This may help promote adhesion to the film 11 and reduce the likelihood of phase separation in the sol-gel.
- about 1-10%, or more preferably 4% by weight of carbodiimide are added to a 100 parts by weight mix of Titanium isopropoxide and silane modified polyester.
- Example 1 relates to the preparation of a suitable ceramer Coating.
- Example 1 Preparation of a 50:50 Ti(iPrO) £ : Adcote 89R3 Ceramer Solution
- 2.5 gms of titanium isopropoxide is taken into a polypropylene bottle.
- 2.5 gms of MEK is weighed into another bottle and 0.05 ml of ION HCL is added. This acidic MEK is added to titanium isopropoxide slowly taking care to contain any exotherm present.
- the cured ceramer coatings have a high refractive index in the order of 1.69 to 1.71.
- the first polymeric layer 14 may be formed from the same polymeric matrix as the optional abrasion resistant coating 12 with the further addition of particles of an iron oxide which have been reduced to an equivalent average, diameter size of less than 50 nm (m 9 ).
- Suitable powdered iron oxide is available from Cookson Matthey Ceramics & Materials Ltd, England and sold under the references AC0575 and AC 1075.
- the preferred iron oxide is haematite (Fe 2 0 3 ), that is the AC0575.
- the amount of iron oxide added to the coating will determine the refractive index of the coating.
- a layer 14 containing 35-40% by weight of iron oxide will have a refractive index of at least 1.69, and with loadings of greater than 50% it will be possible to raise the refractive index to at least 1.8, or higher as is desired.
- the iron oxide is suspended in suitable solvent for the polymer, typically MEK, together with a dispersant e.g. Solsperse 24000 available from Zeneca.
- suitable solvent for the polymer typically MEK
- a dispersant e.g. Solsperse 24000 available from Zeneca.
- the mixture is thoroughly mixed in a ball mill to ensure an even dispersion of the particles in the solvent, and the suspension is then mixed with the polymer by mechanical mixing.
- the final layer (14) may include 5-85% by weight of haematite, 1-13% by weight of surfactant, with the balance being the polymer matrix.
- Example 2 relates to the preparation of a red iron oxide dispersion and its mixing into the polymer coating.
- the dispersion was coated onto the substrate and cured using UV radiation to give a final coating containing approximately 18% by volume iron oxide.
- the second outer polymeric layer 15 is a fluorine containing polymer which may be selected from among many well known and ready synthesisable fluorinated polymers.
- the refractive index typically decreases with increased fluorination. Fluorinated polymers having a respective refractive index of between 1.3-1.45 are preferred.
- Preferred fluorinated polymers may include a copolymer of vinylidene fluoride and tetrafluorethylene, copolymers of chlorotrifluoro ethylene and vinylidene fluoride, polyvinylidene fluoride, dehydrofluorinated polyvinylidene fluoride, copolymer of hexafluoropropylene and vinylidene fluoride, and fluorinated acrylics such as poly (1-1 dihydropentadecafluorooctyl acrylate) or poly [(11 dihydropentadenefluorooctyl methacrylate) which have a refractive index of about 1.37-1.38 and other perfluoro polyesters containing acrylate end groups.
- the preferred fluorinated polymer is an acrylate modified low molecular weight perfluoro polyether.
- the low molecular perfluoropolyether is available from Ausimont (an Italian company) under the trade name Fluorlink ⁇ , which then undergoes further reaction resulting in, preferably 100%, substitution of acrylate groups for the isocyanate and hydroxyl groups.
- Example 3 relates to the preparation of two suitable per fluoropolyether polymers.
- Example 3 Synthesis of Acrylate Tipped Perfluoropolyether Polymers
- Acrylate monomers are reacted with isocyanate terminated fluoropolymers using a suitable solvent at room temperature.
- the acrylated fluoropolymer is UV cured to give low refractive index hard coats in the order of 1.37 to 1.4.
- Example 3a 0.00159 moles of Fluorolink B (Fomblin Z Disoc, supplied by Ausimont, Italy) is taken into a dry flask purged with nitrogen. The polymer is dissolved in hexafluoroxylene. Then an excess of hydroxybutylacrylate (0.003 moles) was added and the sum stirred at room temperature for a week. When there is no residual isocyanate, (confirmed by Infrared analysis), the clean, viscous solution was applied to the first layer 14 and cured.
- Fluorolink B Fluorolink B (Fomblin Z Disoc, supplied by Ausimont, Italy)
- Fluorolink B 0.0015 moles of Fluorolink B is taken into a clean dry flask and purged with nitrogen. The polymer was dissolved in hexafluoroxylene. When dissolved completely, an excess of pentaerythritol triacrylate is added to it and stirred at room temperature for a week. The reaction was continued until there was no isocyanate.
- the triacrylate functionalised polymer was coated on to the first layer 14 and UV cured to give a hard low refractive index coating.
- the fluorinated polymer may be applied as a solution in various solvents, in particular ketones, such as methylethyl ketone, methyl isobutyl ketone, methyl propyl ketone or mixtures thereof in concentrations of about 2-3%.
- Fluorinated polymers may be used in blends, or mixtures, or alone. The proportions of the blends may vary depending upon the desired properties of the second layer 15, and the fluoropolymers may be mixed with a small percentage of polymethyl methacrylate (0-30%).
- Such materials are described in US 3925082 and US 4046457 the contents of which are hereby incorporated.
- the fluoropolymer second layer 15 is coated onto the dried ceramer layer 14 by any suitable process, preferably by reverse gravure process to a thickness (when dried) of about 90 nm (90 x 10 "9 m) which is about l A of wavelength.
- the presence of any groups in the first layer 14 may promote adhesion between the two layers 14 and 15.
- a suitable fluoropolymer may be evaporated under vacuum and deposited onto the first polymer layer, and subsequently cured by electron beam initiator techniques.
- the film laminate will preferably comprise at least a polyester substrate having a refractive index of about 1.6, an inner of a polymeric film (14) containing metal oxide and having a refractive index of greater than 1.68 and preferably greater than 1.7, and a layer thickness of about l A wavelength, with a second polymeric layer (15) in contact with the first layer (14) to form an exposed outer layer and comprising a fluorinated polymer having a refractive index of 1.45 or less preferably no more than 1.4 and a thickness of about l A wavelength.
- the polyester substrate having a refractive index of about 1.6
- a second polymeric layer in contact with the first layer (14) to form an exposed outer layer and comprising a fluorinated polymer having a refractive index of 1.45 or less preferably no more than 1.4 and a
- the anti-reflective layers comprise as before the outer exposed polymeric lower refractive index layer 15 and the adjacent inner higher refractive index layer 14.
- the laminate may further comprise function layers arranged between the hard coat (12) and the two outer layers (14) (15).
- the function layers may comprise a second pair of layers 24, 25 or alternatively may further include only one further additional layer (24) or (25).
- the layers (24) (25) may be optically active having a pre-determined refractive index, or other property such as colour to suit the end use of the film.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU45541/99A AU4554199A (en) | 1998-06-10 | 1999-06-09 | Low reflective films |
DE69927974T DE69927974T2 (en) | 1998-06-10 | 1999-06-09 | RELATED FILMS |
JP2000553838A JP2002517791A (en) | 1998-06-10 | 1999-06-09 | Low reflective thin film |
KR1020007013851A KR20010085264A (en) | 1998-06-10 | 1999-06-09 | Low reflective films |
EP99928484A EP1093592B1 (en) | 1998-06-10 | 1999-06-09 | Low reflective films |
CA002334603A CA2334603A1 (en) | 1998-06-10 | 1999-06-09 | Low reflective films |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/095,010 | 1998-06-10 | ||
US09/095,010 US6245428B1 (en) | 1998-06-10 | 1998-06-10 | Low reflective films |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999064899A1 WO1999064899A1 (en) | 1999-12-16 |
WO1999064899A9 true WO1999064899A9 (en) | 2000-10-19 |
Family
ID=22248574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/012889 WO1999064899A1 (en) | 1998-06-10 | 1999-06-09 | Low reflective films |
Country Status (10)
Country | Link |
---|---|
US (2) | US6245428B1 (en) |
EP (2) | EP1093592B1 (en) |
JP (1) | JP2002517791A (en) |
KR (1) | KR20010085264A (en) |
AU (1) | AU4554199A (en) |
CA (1) | CA2334603A1 (en) |
DE (1) | DE69927974T2 (en) |
ES (1) | ES2251199T3 (en) |
TW (1) | TW544400B (en) |
WO (1) | WO1999064899A1 (en) |
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US6800378B2 (en) * | 1998-02-19 | 2004-10-05 | 3M Innovative Properties Company | Antireflection films for use with displays |
US6419873B1 (en) | 1999-03-19 | 2002-07-16 | Q2100, Inc. | Plastic lens systems, compositions, and methods |
US6372354B1 (en) * | 1999-09-13 | 2002-04-16 | Chemat Technology, Inc. | Composition and method for a coating providing anti-reflective and anti-static properties |
US6528955B1 (en) | 2000-03-30 | 2003-03-04 | Q2100, Inc. | Ballast system for a fluorescent lamp |
US6698708B1 (en) | 2000-03-30 | 2004-03-02 | Q2100, Inc. | Gasket and mold assembly for producing plastic lenses |
US6723260B1 (en) | 2000-03-30 | 2004-04-20 | Q2100, Inc. | Method for marking a plastic eyeglass lens using a mold assembly holder |
US6716375B1 (en) | 2000-03-30 | 2004-04-06 | Q2100, Inc. | Apparatus and method for heating a polymerizable composition |
US6632535B1 (en) * | 2000-06-08 | 2003-10-14 | Q2100, Inc. | Method of forming antireflective coatings |
WO2002012404A2 (en) * | 2000-08-07 | 2002-02-14 | 3M Innovative Properties Company | Antisoiling hardcoat |
US7351471B2 (en) * | 2000-12-06 | 2008-04-01 | 3M Innovative Properties Company | Fluoropolymer coating compositions with multifunctional fluoroalkyl crosslinkers for anti-reflective polymer films |
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1998
- 1998-06-10 US US09/095,010 patent/US6245428B1/en not_active Expired - Lifetime
-
1999
- 1999-06-09 WO PCT/US1999/012889 patent/WO1999064899A1/en active IP Right Grant
- 1999-06-09 DE DE69927974T patent/DE69927974T2/en not_active Expired - Lifetime
- 1999-06-09 EP EP99928484A patent/EP1093592B1/en not_active Expired - Lifetime
- 1999-06-09 JP JP2000553838A patent/JP2002517791A/en active Pending
- 1999-06-09 EP EP05011972A patent/EP1584953A1/en not_active Withdrawn
- 1999-06-09 ES ES99928484T patent/ES2251199T3/en not_active Expired - Lifetime
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- 1999-06-09 AU AU45541/99A patent/AU4554199A/en not_active Abandoned
- 1999-06-09 CA CA002334603A patent/CA2334603A1/en not_active Abandoned
- 1999-07-27 TW TW088109677A patent/TW544400B/en not_active IP Right Cessation
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WO1999064899A1 (en) | 1999-12-16 |
EP1093592A1 (en) | 2001-04-25 |
EP1584953A1 (en) | 2005-10-12 |
DE69927974D1 (en) | 2005-12-01 |
TW544400B (en) | 2003-08-01 |
DE69927974T2 (en) | 2006-08-03 |
US20010033934A1 (en) | 2001-10-25 |
ES2251199T3 (en) | 2006-04-16 |
CA2334603A1 (en) | 1999-12-16 |
EP1093592B1 (en) | 2005-10-26 |
AU4554199A (en) | 1999-12-30 |
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