WO2017001902A1 - Revêtement anti-rayures et photochromique, procédé d'application et usage respectifs - Google Patents

Revêtement anti-rayures et photochromique, procédé d'application et usage respectifs Download PDF

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Publication number
WO2017001902A1
WO2017001902A1 PCT/IB2015/058632 IB2015058632W WO2017001902A1 WO 2017001902 A1 WO2017001902 A1 WO 2017001902A1 IB 2015058632 W IB2015058632 W IB 2015058632W WO 2017001902 A1 WO2017001902 A1 WO 2017001902A1
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WIPO (PCT)
Prior art keywords
scratch
photochromic
photochromic coating
lens
mixture
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PCT/IB2015/058632
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English (en)
Inventor
Marita ALVES CARDOSO
Paulo Jorge DOS SANTOS COELHO
Verónica CORTÉS DE ZEA BERMUDEZ
André Emanuel TEIXEIRA POLÓNIA
Original Assignee
Universidade De Trás-Os-Montes E Alto Douro
Polo - Produtos Ópticos, S.A.
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Application filed by Universidade De Trás-Os-Montes E Alto Douro, Polo - Produtos Ópticos, S.A. filed Critical Universidade De Trás-Os-Montes E Alto Douro
Publication of WO2017001902A1 publication Critical patent/WO2017001902A1/fr

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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
    • G02B1/14—Protective coatings, e.g. hard coatings
    • 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
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers
    • G02B1/116—Multilayers including electrically conducting layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/23—Photochromic filters
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
    • G02C7/102—Photochromic filters

Definitions

  • the present application describes an anti-scratch and photochromic coating, respective method of application and use .
  • organic molecules are not active in the solid state but may be dispersed in a polymer yielding a photochromic polymeric material, although the interaction between the polymer matrix and the photochromic molecules determines the final properties.
  • the chemical nature of the polymer matrix significantly affects the colouration speed under sunlight exposure, the obtained colouration, the intensity of colouration and the discolouration speed in the dark and may even, in extreme cases, inhibit this phenomenon [2] .
  • the matrix while still a liquid, can be applied on the surface of transparent plastic ophthalmic lenses, obtaining, after a heat treatment, a nanometric coating with photochromic properties.
  • These ophthalmic lenses filter solar radiation depending on its intensity. They can acquire grey or brown tones when directly exposed to the sun, thus protecting the user from sunlight, and revert to the colourless state when entering in a low luminous intensity area [ 3 ] .
  • the most frequently used photochromic substances include several diarylnaphthopyrans that are able to develop yellow, red, blue or grey tones when in solution or dispersed in a polymer matrix and irradiated with sunlight [4] .
  • the sunlight exposure time required to obtain a high colour intensity and the discolouration time in the dark rely heavily on the available free volume within the polymer.
  • Polyurethanes are examples of flexible polymers suitable for this purpose [5] .
  • Plastic lenses are much lighter, comfortable and easy to work with [7].
  • the most commonly used materials include CR-39® (poly diethylene glycol bis (allyl carbonate) ) , Lexan® (polycarbonate) and MR-8 ( thiourethane ) which allow the incorporation of several organic photochromic compounds.
  • CR-39® poly diethylene glycol bis (allyl carbonate)
  • Lexan® polycarbonate
  • MR-8 thiourethane
  • Another method known as "cast-in-place” consists in the incorporation of photochromic compounds directly in a polymerizable mixture originating the lens material.
  • the photochromic molecules are a part of the lens, being distributed throughout the material and not only on its surface.
  • This technique has at least three disadvantages: 1) requires a larger amount of photochromic compound that is generally quite expensive; 2) the polymerization reaction initiators degrade the photochromic molecules reducing their performance and producing coloured products which confer a residual colour to the lens; 3) since the thickness of the lens is variable the colouration in the lens is not uniform [8] .
  • An alternative and widely used method consists in dissolving at least one photochromic molecule in a solution containing at least a monomer which is then dispersed in the lens surface. This is then subjected to a thermal or UV treatment to harden and form a thin coating that contains photochromic compounds.
  • the solution contains the precursors of a polyurethane polymer whose organized final structure is obtained after heat treatment. In this case the nature of the lens base material is less important. Nevertheless, none of these methods results in a lens present exhibiting a rapid colouration and an equally fast discolouration.
  • the most recent photochromic lenses feature photochromic properties in addition to anti-scratch, antistatic, antireflective and hydrophobicity properties. To confer these properties to the lens it is necessary to put a second anti- scratch coating over the photochromic coating and make a final multilayer treatment that will confer antistatic, antireflective and hydrophobicity characteristics [9].
  • an anti-scratch coating to ophthalmic lenses is a well-known and extensively used process since the material of the as-prepared lens displays very low scratch resistance. These coatings are usually applied by immersing the lens in a mixture containing at least one monomer that is polymerized by thermal treatment or by irradiation with UV light [10] .
  • the anti-scratch polymers most commonly used come from monomers such as acrylates and aliphatic methacrylates , urethane (meth) acrylates or oligomers thereof, alkoxysilanes , colloidal silica and mixtures thereof.
  • the resulting coating is transparent, very hard, and resistant to abrasion, resistant to chemicals and to degradation by sunlight. These polymers are capable of forming chemical bonds with the substrate of the lenses during polymerization resulting in coatings with excellent adhesion to the lens [9, 10] .
  • a coating consisting of several layers of metal oxides, capable of adhering well to the scratch-resistant coating, alternating high refractive index layers with low refractive index layers, a layer of a conductive material, and finally a layer composed of a fluoropolymer [11] .
  • the general process of production of an ophthalmic lens with photochromic, anti-scratch, antireflective, anti-static and hydrophobic properties generally involves:
  • the present application discloses a technical solution developed to overcome the technical problems described above and allows obtaining photochromic lenses with less coatings and a better response to light stimulus.
  • the present application describes an anti-scratch and photochromic coating applied in the form of varnish with the following composition by weight:
  • the additives included in the anti-scratch and photochromic coating comprise colour stabilizers, UV blockers, antioxidants, and surfactants.
  • the additives included in the anti- scratch and photochromic coating are 4,4'- isopropylidenediphenol and/or 4 , 4 ' -sulphonildiphenol and/or 1, 3, 5-trimethyl-2 , 4, 6-tris (3, 5-di-t-butyl-4-hydroxybenzyl ) benzene and/or 1-methylimidazole and/or 2- ( 2-hydroxy-5- methylphenyl ) benzotriazole and/or 2-hydroxy-4- methoxybenzophenone and/or 2-hydroxybenzophenone and/or 2- ( 2H-benzotriazol-2-yl ) -4 , 6-di-t-pentilphenol and/or 2,2'- dihydroxy-4-methoxybenzophenone and/or 1H, 1H, 2H, 2H- perfluorooctyl triethoxysilane and/or 1H, 1H, 2H, 2H- perfluorodecyl-triethoxysilane and/
  • the alkoxysilanes included in the anti-scratch and photochromic coating are methyltriethoxysilane and/or ( 3-glycidoxypropyl ) methyldiethoxysilane and/or tetraethoxysilane and/or vinyltriethoxysilane and/or ( 3-mercaptopropyl ) trimethoxysilane and/or ( 3-aminopropyl ) triethoxysilane and/or phenyltrietoxisilane and/or isocyanate-propyl- triethoxysilane .
  • the plasticizers included in the anti- scratch and photochromic coating are amines and/or diamines and/or polyethylene glycols.
  • the anti-scratch and photochromic coating comprises the presence of a catalyst.
  • the catalyst used in the anti- scratch and photochromic coating is acetic acid and/or hydrochloric acid and/or nitric acid and/or sulfuric acid.
  • the present application also describes ophthalmic lens comprising the anti-scratch and photochromic coating described in any one of the preceding paragraphs of this subsection .
  • the present application further describes the method of applying the anti-scratch and photochromic coating comprising the following steps:
  • preparing the solution for application in the anti-scratch and photochromic coating application method comprises the following steps:
  • the deposition of the mixture on the side of the lens, in the method of applying the anti-scratch and photochromic coating is carried out by spin-coating.
  • the deposition of the mixture on the side of the lens, in the method of applying the anti- scratch and photochromic coating is carried out by dip- coating .
  • the polymerization and hardening heat treatment used in the application method of the anti-scratch and photochromic coating implies placing the ophthalmic lens in an oven between 50-100°C, in a horizontal position for 12 to 48 hours.
  • the polymerization and hardening heat treatment used in the application method of the anti-scratch and photochromic coating comprises subjecting the ophthalmic lens to an irradiation with UV or infrared (IR) light.
  • IR infrared
  • the multilayer treatment used in the present invention comprises subjecting the lens to the electron beam vapour deposition technique, the oxide layers being applied between alternating low refractive index material and high refractive index material.
  • a layer of In 2 0 3 -Sn02 indium tin oxide, ITO is applied between the different layers of oxides.
  • the present application describes an anti-scratch and photochromic coating, respective method of application and use .
  • a coating for example, in the form of a varnish, which once applied on the surface of a lens and thermally treated will confer photochromic and anti- scratch properties simultaneously.
  • the application process involves the use of a single coating for these two functions, which reduces the risk of crack formation and also allows reducing the response time of the lens to light stimulus, by making either colouration or discolouration faster.
  • the varnish comprises a composition by weight that includes between 33% and 75% of a mixture of alkoxysilanes , between 5% and 50% plasticizers, 0.5% and 2.5% of photochromic dyes and between 5% and 15% of additives being deposited on the surface of the lens by spin-coating or dip-coating.
  • the lens is then subjected to a heat treatment at atmospheric pressure between 40°C and 120°C.
  • the coating application method comprises the following steps:
  • a multilayer treatment to confer antistatic, antireflective and hydrophobic properties is provided.
  • the mixture of the elements in the solution preparation step comprises the following steps:
  • the coating now disclosed may be used in any type of material to which is intended to confer anti-scratch and photochromic characteristics, such as ophthalmic lenses.
  • Figure 1 shows a photograph of a grey lens a) before and b) after exposure to UV radiation for 30 seconds.
  • Figure 2 illustrates an absorption spectrum in the visible spectrum of a grey lens before and after exposure to UV radiation for 30 seconds.
  • Figure 3 illustrates a graph of the grey lens discolouration kinetics after exposure to UV radiation.
  • Figure 4 illustrates a photograph of the brown lens a) before and b) after exposure to UV radiation for 30 seconds.
  • Figure 5 illustrates a visible absorption spectrum of the brown lens described in example 2 before and after exposure to UV radiation for 30 seconds.
  • Figure 6 illustrates a brown lens discolouration kinetics after exposure to UV radiation.
  • the present application describes an anti-scratch and photochromic coating, respective application process and use.
  • the coating is prepared by dissolving the photochromic dyes and several additives in an organic solvent to which, for the sake of clarity, will be referred to as solution A. This solution is then added to a solution B containing the necessary reagents for the formation of a siloxane-based organic/inorganic hybrid matrix, and stirred at room temperature to form a completely homogeneous solution.
  • room temperature is considered. This is the most usual situation which allows a person to work comfortably, ranging approximately between 15 to 30°C, preferably between 20 to 25°C, more preferably between 21 to 23°C, without restricting however the temperatures below these limits and since it is an acceptable and recognized as room temperature, inside a building.
  • At least one photochromic dye must be used.
  • At least one of the photochromic dyes of Vivimed labs® namely Volcanic Grey, Penine Green, Humble Blue, Graphite, Amber, Midnight Grey, Plum Red, Gold, Ruby, Corn Yellow, Cinnabar can be used.
  • the additives include several of the following compounds: 4,4'- isopropylidenediphenol and/or 4 , 4 ' -sulphonildiphenol and/or 1 , 3 , 5-trimethyl-2 , 4 , 6-tris ( 3 , 5-di-t-butyl-4- hydroxybenzyl ) benzene and/or 1-methylimidazole and/or 2- (2- hydroxy-5-methylphenyl ) benzotriazole and/or 2-hydroxy-4- methoxybenzophenone and/or 2-hydroxybenzophenone and/or 2- ( 2H-benzotriazol-2-yl ) -4 , 6-di-t-pentilphenol and/or 2,2'- dihydroxy-4-methoxybenzophenone and/or 1H, 1H, 2H, 2H- perfluorooctyl triethoxysilane and/or 1H, 1H, 2H, 2H- perfluorodecyl triethoxysilane and/
  • the suitable solvent for solution A may be tetrahydrofuran, dimethylsulfoxide or dimethylformamide . It is also important to note that all compounds are well dissolved so that the final lens does not contain any solid residue on its surface.
  • Solution B contains a mixture of several alkoxysilanes and several plasticizers .
  • the alkoxysilanes include, for example, methyltriethoxysilane and/or ( 3-glycidoxypropyl ) methyldiethoxysilane and/or tetraethoxysilane and/or vinyltriethoxysilane and/or (3- mercaptopropyl ) trimethoxysilane and/or ( 3-aminopropyl ) triethoxysilane and/or phenyltrietoxisilane and/or isocyanate-propyl- triethoxysilane .
  • Plasticizers include, but are not limited to, amines, such as for example octylamine and/or diethylenetriamine and/or triethylenetetramine and/or diamines, such as for example Jeffamine 230® and/or Jeffamine 400® and/or Jeffamine 600® and/or Jeffamine 900® and/or Jeffamine 2000® and polyethylene glycols, such as poly ( ethylene glycol) methyl ether 350 and/or poly ( ethylene glycol) dimethyl ether 500.
  • amines such as for example octylamine and/or diethylenetriamine and/or triethylenetetramine and/or diamines
  • polyethylene glycols such as poly ( ethylene glycol) methyl ether 350 and/or poly ( ethylene glycol) dimethyl ether 500.
  • a catalyst is important to ensure the polycondensation time is appropriate or acceptable.
  • One of the following compounds may be used: acetic acid and/or hydrochloric acid and/or nitric acid and/or sulfuric acid.
  • the most suitable solvent for the solution B is an alcohol such as methanol, ethanol or isopropanol.
  • precursors that may be used to form a polymer/siloxane hybrid matrix.
  • the matrix proposed allows the formation of chemical cross-links among the several components resulting in a three-dimensional network, which imparts greater stiffness and higher thermal stability to the final material.
  • long chain spacers allow creating defects with a high free volume, suitable for incorporation of non-volatile molecules, such as photochromic dyes and additives, which will establish interactions via hydrogen bonding or van der Waals interactions with the chains.
  • Preferred compositions are those that give rise to/produce hybrids with high transparency and high resistance to scratching, but have no negative effect on the photoactivation of the photochromic molecules.
  • the coating may be deposited on the convex side of the lens, or on both sides by a deposition technique, for example by spin-coating or dip-coating techniques.
  • a deposition technique for example by spin-coating or dip-coating techniques.
  • the lens is placed under rotation on its central axis at a suitable speed, preferably between 50 and 500 rpm, and the solution is added in a few seconds, perpendicularly to the centre of the lens. During the rotation of the lens, most of the solution is expelled from its surface.
  • the film thickness will depend on the rotation speed as well as on the mixture viscosity and on its surface tension.
  • the lens is then carefully removed from the sample holder of the deposition machine and may preferentially be placed in an oven between 50-100°C, in a horizontal position for several hours, preferably between 12 and 48 hours, or subjected to irradiation with UV or IR light in order to evaporate all the solvent and to complete the formation of the siloxane network .
  • the multi-layer treatment used to confer antistatic, antireflective and hydrophobic properties may be electron beam vapour deposition technique.
  • This coating consists of multiple layers, typically between 5 and 15, with thicknesses between 10 and 200 nanometers.
  • the coating now described may be applied to any type of ophthalmic lens such as prescription, non-prescription, monofocal or progressive lenses.
  • Solution A was prepared by dissolving two photochromic dyes, one antioxidant (4,4'- isopropylidenediphenol , 4,4'- sulphonildiphenol , 1 , 3 , 5-trimethyl-2 , 4 , 6-tris (3,5-di-t- butyl-4-hydroxybenzyl ) benzene, 0.1-0.5 g) ) , one colour stabilizer ( 1-methylimidazole, 2- ( 2-hydroxy-5-methylphenyl ) benzotriazole, 0.01-0.1 g) , one UV blocker ( 2-hydroxy-4- methoxybenzophenone, 2-hydroxybenzophenone, 2- (2H- benzotriazol-2-yl ) -4, 6-di-t-pentilphenol, 2,2' -dihydroxy-4- methoxybenzophenone, 0.01-0.1 g) , one surfactant
  • Solution B was prepared by dissolving 1-5 g of at least two silanes from among methyltriethoxysilane, tetraethoxysilane, ( 3-glycidoxypropyl ) methyldiethoxysilane, vinyltriethoxysilane ( 3-mercaptopropyl ) trimethoxysilane, (3- aminopropyl ) triethoxysilane, phenyltrietoxisilane or isocyanate-propyl-triethoxysilane in ethanol (1-5 mL) and placed under stirring for 5 min.
  • Solution A was added to solution B and the resulting solution was stirred for 10 min.
  • Water was added (1-5 mL) and the solution obtained was placed in a glycerin bath at 50°C under constant agitation of 150 rpm. The total volume is about 15 mL .
  • the viscosity of the solution was continuously measured and when a value between 600-1000 mPa was achieved, a volume of 5 mL was withdrawn by using a micropipette with a disposable tip.
  • a lens was placed on a spin coater under rotation (100- 500 rpm) and the 5 ml of the above described solution were deposited in 3 seconds on the lens centre. After 2 min, the lens was removed and placed in an oven at 50°C for 2-18 h.
  • the electron beam vapour deposition technique was used.
  • the as-prepared coating consists of several layers, typically between 5 and 15 with thicknesses between 10 and 200 nanometers.
  • the last layer is constituted by a commercial fluoropolymer : Satin (Satisloh) or Duralon AFP (COTEC) .
  • Satin Surisloh
  • COTEC Duralon AFP
  • the remaining layers are oxides, one with a high refractive index, between 2 and 2.5, and another with a low refractive index, between 1.3 and 1.79. These layers are applied by alternating a low refractive index material with layers of higher refractive index material.
  • the high refractive index material is one of the following: Ce0 2 (2.30-2.00), Zr0 2 (2.10-2.00), Ti0 2 (2.30-2.00), Ta 2 0 5
  • the low refractive index material is one of the following: MgF 2
  • a conductive material typically In 2 0 3 -Sn0 2 (ITO) is introduced between the layers of the coating to confer antistatic properties.
  • the final lens was exposed to the sun to determine the colouration and discolouration times.
  • the colouration time was 30 s and the time necessary for its full discolouration was 2 min.
  • the lens acquired a grey colour.
  • the visible absorption spectrum was measured using a UV-Vis spectrophotometer (Cary 50) . In the activated state it exhibited a transmittance of 40% and in the non-activated state it presented a transmittance higher than 90%.
  • Solution A was prepared by dissolving four photochromic dyes, one antioxidant (4,4'- isopropylidenediphenol , 4,4'- sulphonildiphenol , 1 , 3 , 5-trimethyl-2 , 4 , 6-tris (3,5-di-t- butyl-4-hydroxybenzyl ) benzene, 0.1-0.5 g) ) , one colour stabilizer ( 1-methylimidazole, 2- ( 2-hydroxy-5-methylphenyl ) benzotriazole, 0.01-0.1 g) , one UV blocker ( 2-hydroxy-4- methoxybenzophenone, 2-hydroxybenzophenone, 2- (2H- benzotriazol-2-yl ) -4, 6-di-t-pentilphenol, 2,2' -dihydroxy-4- methoxybenzophenone, 0.01-0.1 g) , one surfactant
  • Solution B was prepared by dissolving 1-5 g of two silanes (methyltriethoxysilane, tetraethoxysilane, (3- glycidoxypropyl ) methyldiethoxysilane, vinyltriethoxysilane (3-mercaptopropyl) trimethoxysilane, (3- aminopropyl ) triethoxysilane, phenyltrietoxisilane or isocyanate-propyl-triethoxysilane in ethanol (1-5 mL) and placed under stirring for 5 min. Several spacers, each constituting 5-50% of the total were added to Solution B and stirred at room temperature for further 5 min.
  • silanes methyltriethoxysilane, tetraethoxysilane, (3- glycidoxypropyl ) methyldiethoxysilane, vinyltriethoxysilane (3-mercaptopropyl) trimethoxysilane, (3- aminopropyl
  • Solution A was added to solution B and the resulting solution was stirred for 10 min.
  • Water was added (1-5 mL) and the solution obtained was placed in a glycerine bath at 50°C under constant agitation of 150 rpm. The total volume was about 15 mL .
  • the viscosity of the solution was measured continuously and when a value between 600-1000 mPa was reached, 5 ml were withdrawn using a micropipette with a disposable tip.
  • a lens was placed on a spin coater under rotation (100-500 rpm) and 5 ml of the above solution were deposited in 3 seconds under the lens centre. After 2 min, the lens was removed and placed in an oven at 50°C for 2-18 h.
  • the electron beam vapour deposition technique was used.
  • the as-prepared coating consists of several layers (between 5 and 15) with thickness between 10 and 200 nanometers.
  • the last layer is a commercial fluoropolymer : Satin (Satisloh) or Duralon AFP (COTEC) .
  • Satin Surisloh
  • COTEC Duralon AFP
  • the remaining layers are oxides, one with high refractive index (between 2 and 2.5) and another with low refractive index (between 1.3 and 1.7) . These layers are applied by alternating a low refractive index material with layers of higher refractive index material .
  • the high refractive index material is one of the following: Ce0 2 (2.30-2.00), Zr0 2 (2.10-2.00), Ti0 2 (2.30-2.00), Ta 2 0 5
  • the low refractive index material is one of the following: MgF 2
  • a conductive material typically ITO, is introduced between the layers of this coating to confer antistatic properties.
  • the lens was exposed to sun for determining the colouration and discolouration time.
  • the colouration time was 30 s and the time necessary for its complete discolouration was 2 min.
  • the lens acquires a brown colour.
  • the visible absorption spectrum was measured using a UV-Vis spectrophotometer (Cary 50) . In the activated state it exhibits 40% transmittance and in the non-activated state presents transmittance higher than 90%.
  • the coatings obtained were characterized as to their photochromic, anti-scratch and adhesion to the lenses properties .
  • the adhesion degree of the coating to the substrate was evaluated by placing adhesive tape over a lens with 6 parallel cuts separated by a distance of 1 mm. When removing the adhesive tape it was found that the coating was not removed indicating good adhesion of the coating to the lens, in accordance with ISO 2409 standard of 2013.
  • Photochromic properties notably with regard to the colour developed under sun exposure, maximum colour intensity, discolouration speed and presence or absence of residual colour were determined using a UV lamp and a UV spectrophotometer .
  • the absorbance spectrum of the lenses was measured, before and after exposure to UV light for 30 s, thus characterizing the obtained colouration.
  • the results show a very significant increase in absorbance at any wavelength, as illustrated in Figures 2 and 5. After removing the light source, the absorbance at a given wavelength was recorded over time, allowing measurement of the lens discolouration kinetics, as illustrated in Figures 3 and 6.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Optical Filters (AREA)
  • Eyeglasses (AREA)

Abstract

La présente invention porte sur un revêtement anti-rayures et photochromique, son procédé d'application et son usage respectifs. L'avantage principal de ce revêtement est qu'il permet l'obtention de lentilles transparentes très résistantes aux rayures et pouvant développer, en quelques secondes, une coloration grise ou marron lorsqu'elles sont exposées au soleil tout en pouvant revenir à leur état incolore initial lorsqu'elles ne sont plus exposées au soleil. D'un point de vue pratique, le revêtement selon la présente invention peut servir dans tout type de matériau auquel on prévoit d'attribuer des propriétés anti-rayures et photochromiques, par exemple des lentilles ophtalmiques.
PCT/IB2015/058632 2015-06-29 2015-11-09 Revêtement anti-rayures et photochromique, procédé d'application et usage respectifs WO2017001902A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190284324A1 (en) * 2016-10-11 2019-09-19 Mitsui Chemicals, Inc. Polymerizable composition for optical materials and application of same
KR20220136496A (ko) * 2017-08-21 2022-10-07 나이키 이노베이트 씨.브이. 유체-충전식 블래더 챔버를 포함하는 조정 가능한 발 지지 시스템
CN116969691A (zh) * 2022-04-22 2023-10-31 荣耀终端有限公司 抗划伤减反射玻璃、电子设备的显示屏及电子设备

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