WO2024200260A1 - Corps de verre revêtu - Google Patents

Corps de verre revêtu Download PDF

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Publication number
WO2024200260A1
WO2024200260A1 PCT/EP2024/057763 EP2024057763W WO2024200260A1 WO 2024200260 A1 WO2024200260 A1 WO 2024200260A1 EP 2024057763 W EP2024057763 W EP 2024057763W WO 2024200260 A1 WO2024200260 A1 WO 2024200260A1
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WO
WIPO (PCT)
Prior art keywords
omniphobic
coated glass
mixture
glass according
layer
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/EP2024/057763
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German (de)
English (en)
Inventor
Arne URBAN
Theresa OSTERMEIER
Gerd-Peter Scherg
Christoph TRAULSEN
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Rodenstock GmbH
Original Assignee
Rodenstock GmbH
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Filing date
Publication date
Application filed by Rodenstock GmbH filed Critical Rodenstock GmbH
Priority to EP24715104.6A priority Critical patent/EP4688684A1/fr
Priority to CN202480021302.9A priority patent/CN120858078A/zh
Publication of WO2024200260A1 publication Critical patent/WO2024200260A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/42—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating of an organic material and at least one non-metal coating
    • 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
    • G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings
    • C03C2217/76—Hydrophobic and oleophobic coatings

Definitions

  • the present invention relates to a coated glass body, in particular a coated spectacle lens.
  • spectacle lenses are known that are provided with a top layer of PFAS (per- and polyfluorinated alkyl substances) so that they are easy to clean. This is often done by applying such a material as the last layer after the individual anti-reflective layers in a high-vacuum vapor deposition system. Criticism of PFAS has been increasing for several years because, in addition to their advantageous water and grease-repellent properties, these chemicals are not broken down in the environment and are therefore increasingly accumulating.
  • PFAS per- and polyfluorinated alkyl substances
  • the object of the present invention is therefore to provide a coating for glass bodies that is easy to produce and environmentally friendly.
  • the object is achieved by a glass body with the features of claim 1 and by a method for producing such a coated glass body with the features of claim 29.
  • Preferred embodiments are the subject of the dependent claims.
  • One aspect of the invention relates to a coated glass, in particular a spectacle lens, comprising:
  • the omniphobic layer comprises at least one organosilicon compound.
  • a mechanically stable coating can be formed on the glass body, which can prevent the adhesion of both hydrophilic and oleophilic substances in order to improve the visibility through the glass, in particular the lens, to improve.
  • the glass body is not subject to any particular restriction.
  • the glass body is an object that can be used as an optical material, for example as an ophthalmic lens or as a spectacle lens.
  • the glass body is not restricted to ophthalmic lenses and can be any transparent or optical object to which a coating can be applied in particular.
  • glasses such as crown glass, mineral glass, window glass, flat glass, windshields or viewing windows or elements of optical sensors, light sources or photographic lenses or plastics such as polyacrylates or ceramics.
  • glass generally refers to amorphous solids which, when cooled, change from a melt in the range of the glass transition temperature into the solid state without crystallizing, which in particular contain a proportion of silicon dioxide, e.g. quartz glass, crown glass, flint glass and borosilicate glass and are therefore also called mineral glass.
  • silicon dioxide e.g. quartz glass, crown glass, flint glass and borosilicate glass
  • glasses for example organic glasses or plastic glasses, for example for glasses, plastic plates, in particular made of acrylic glass for viewing windows in housings, buildings and the like, or for transparent objects made of ceramic, such as the sight glass of a fireplace or glass ceramic hobs.
  • Glass in the sense of the application can also comprise natural transparent mineral solid materials, such as crystalline silicon dioxide or thin layered silicates or natural glasses such as moldavite or manen glass.
  • the glass body can be plane-parallel or plate-shaped or curved.
  • one aspect relates to viewing windows, in particular for housings of measuring devices, sensors, buildings, etc., with the additional features of claim 1.
  • the viewing windows can be designed to be exposed to weathering outdoors, for example in housings of cameras positioned outdoors are so that contamination is advantageously reduced and the camera's view is improved, for example.
  • (Optical) sensors can also be immersed in a medium, for example, with a glass body according to the invention separating the sensor from the medium and protecting it from it. In this case too, the glass body according to the invention can protect the sensor from contamination.
  • an (optical) sensor or another electronic passive or active component with the additional features of claim 1.
  • other weathered glass bodies can be provided.
  • a window glass a cover glass for or of solar panels, a glass pane of a vehicle, aircraft or watercraft or a glass body, a lamp or a lighting device, each with the additional features of claim 1.
  • glass bodies can be provided which are frequently touched, such as fingerprint readers, screens, smartphone displays, drinking glasses, cuvettes or other laboratory equipment, decorative objects (knick-knacks) made of glass, each of which is provided with the additional features of claim 1 in order to be less susceptible to dirt, thereby improving function and optical appearance.
  • the glass body preferably consists of a clear or transparent plastic, for example a transparent plastic substrate, which can be treated or untreated.
  • the glass body is, for example, essentially made of polythiourethane, polymethyl methacrylate, polymethyl acrylate, polycarbonate, polyacrylate or polydiethylene glycol bisallyl carbonate, although other transparent plastic materials can also be used.
  • the glass body is essentially made of an acrylate polymer, such as polymethyl methacrylate or polymethyl acrylate.
  • the glass body can be formed with at least partially substantially flat surfaces or surfaces and/or with at least partially substantially curved surfaces or surfaces.
  • the vitreous body may already have one or more functional layers.
  • Suitable functional layers include, for example, Primer coating to increase the breaking strength, a hard coating to increase the scratch resistance, a non-stick layer or easy-to-clean layer, a conductive layer to improve antistatic properties, a mirror layer or multi-layer mirror coating, an anti-reflective layer or multi-layer anti-reflective coating, a coloring layer, etc.
  • the glass body has a silicon oxide layer which is arranged directly or indirectly on a surface of the glass body.
  • the silicon oxide layer can be formed by evaporating silicon monoxide (SiO), silicon dioxide and/or silicon or a mixture thereof in a PVD process in a vacuum, whereby monomolecular SiO is formed in the gas phase (hence the term PVD process for the English term physical vapor deposition) and deposits in a thin layer on the glass body, for example the optical lenses.
  • the layer of silicon oxide is deposited as silicon monoxide (SiO), low-valent silicon oxide (e.g. Si20s) or silicon dioxide (SiO2) or as a mixture of two or three of the aforementioned materials.
  • the surface of the glass body or the optical lenses are thereby advantageously hardened, but in particular also prepared for a covalent bond with a slip-promoting omniphobic layer which is formed on the silicon oxide layer.
  • the term omniphobic is understood as "dirt-repellent” or “reduces dirt adhesion” or “repellent to liquids”.
  • the omniphobic layer is advantageously hydrophobic and/or oleophobic, whereby repelling fat-loving and water-loving phases particularly effectively prevents soiling of the surface of the coated glass and enables easy cleaning of the coated glass.
  • the coated glass can also be used in optical Sensors or cameras can be used, whereby the sensors are better protected against contamination and thus incorrect measurements and can also be cleaned better and thus put back into operation.
  • the coated glass according to the invention also offers advantages in terms of cleaning and thus increased road safety and lower cleaning effort.
  • the omniphobic layer contains at least one organosilicon compound.
  • Organosilicon compounds (also: organosilicon compounds) is the collective term for compounds that either have direct silicon-carbon bonds (Si-C) or in which the carbon is linked to the silicon via oxygen, nitrogen or sulfur atoms.
  • Organosilicon compounds can be described by the general formula R n SiX4- n (with n from 1 to 4), where R represents various organic radicals, such as aliphatics, aromatics, heterocycles. X stands for various groups (see table).
  • the organosilicon compound(s) can be a linear or open-chain compound.
  • the at least one organosilicon compound in the omniphobic layer can have at least one carbon atom, at least one oxygen atom, at least one nitrogen atom, at least one halogen atom and/or at least one sulfur atom, each of which is linked to an associated silicon atom.
  • the omniphobic layer preferably comprises at least one siloxane, in particular a linear siloxane.
  • Siloxanes are polymers with a repeating siloxane unit - Si-O -, where the silicon atom has two organic radicals R1 and R2, which are preferably alkyl groups.
  • a preferred siloxane compound would be, for example, polydimethylsiloxane (PDMS, CAS 63148-62-9) with the chemical formula C2HeOSi, in which the two organic radicals R1 and R2 each represent a methyl group (CH3).
  • An omniphobic layer comprising PDMS as an organosilicon compound can be obtained by hydrolysis reaction using the monomer dimethyldimethoxysilane (CAS 1112-39-6) with the chemical formula Si(OCH3)2(CH3)2 as a precursor or starting substance, if necessary using an acidic catalyst, whereby polydimethylsiloxane is formed.
  • the omniphobic layer can also contain at least one silane or silanol.
  • the omniphobic layer can contain a linear or acyclic silane or a cyclic silane.
  • silane refers to a group of chemical compounds consisting of a silicon backbone and hydrogen.
  • the general molecular formula of linear or acyclic (open-chain, also called catena-silanes) silanes is Si n H2n+2.
  • Ring-shaped silicon-hydrogen compounds, also called cyclosilanes have the general molecular formula Si n H2n.
  • the omniphobic layer preferably comprises at least one silanol, in particular a linear silanol.
  • the at least one organosilicon compound of the omniphobic layer consists of one or more functional groups, which are also referred to as so-called tail groups, which are responsible for the omniphobic properties, and of one or more coupling groups, which are also referred to as so-called anchor groups or head groups, which are responsible for the connection to the silicon oxide layer.
  • the at least one organosilicon compound can also have further components, preferably at least one further molecular group, particularly preferably two or more molecular groups, as explained in the following paragraphs.
  • the functional group or functional chain or tail group of the organosilicon compound has at least one alkyl group or one alkoxy group, represented by the structure -C n H2n+i- or -C n H2n+iO-, where n is an integer that assumes values of 8 or greater, preferably 11 or greater.
  • the properties of this alkyl group depend on its length or, more precisely, on the chain length of the alkyl group. This chain length is generally referred to as the C chain length based on the number of carbon atoms it contains.
  • the length of the alkyl or alkoxy chain substances with a chain length greater than or equal to C8 are preferred, particularly preferably with a chain length greater than or equal to 11, since these enable the formation of SAMS (self-assembled monolayers) in addition to hydrophobic properties that increase with increasing chain length.
  • a longer alkyl chain of the tail group results in improved shielding of the coupling group, which is used to bond to the substrate. Good shielding advantageously leads to improved cleaning resistance, which means that such a compound survives a large number of cleaning strokes, with one cleaning stroke reducing the cleaning time of such a wiping movements typically present in the vitreous body.
  • the organosilicon compound preferably has at least one hydrolyzable group as a coupling group or head group, which can react with water, resulting in the splitting off of a leaving group to form a low-molecular compound.
  • this can result in a hydrolysis reaction in which the organosilicon compound can bind to hydroxy groups (OH groups) present or formed on the silicon oxide layer of the glass body to form the omniphobic layer, whereby the organosilicon compound forms a covalent bond with the silicon oxide layer of the glass body and in this way the omniphobic layer is formed on the glass body.
  • OH groups hydroxy groups
  • the at least one hydrolyzable group is preferably a chloro or ethoxy group, an amine, a silazane, an oxime or an acetoxy group, and in particular the hydrolyzable group is a methoxy group.
  • the number of coupling groups can vary from one to three, whereby instead of additional head or coupling groups, additional tail groups, i.e. omniphobic alkyl or alkoxy chains, can also be present, which can bring about increased hydrophobicity or better shielding.
  • the organosilicon compound can comprise or be hexadecyltrimethoxysilane (CAS 16415-12-6) with the formula CH3(CH2)i5-Si(OCH3)3. More preferably, or also as another organosilicon compound in combination to the aforementioned, the organosilicon compound can have or be octadecyltrimethoxysilane (CAS 3069-42-9) with the formula CH3(CH2)i7-Si(OCH3)3.
  • the chain length of the tail group, the alkyl chain is C16 or C18 in the above cases.
  • organosilicon compounds mentioned above are methoxysilanes, whereby the organosilicon compound can alternatively or additionally contain chlorosilanes and/or ethoxysilanes, particularly preferably hexadecyltrichlorosilane, hexadecyltriethoxysilane, octadecyltrichlorosilane and/or octadecyltriethoxysilane.
  • the omniphobic layer can also have a further, second organosilicon compound in addition to the at least one organosilicon compound, i.e. the omniphobic layer can have a mixture formed from at least two organosilicon compounds.
  • This second organosilicon compound has at least one alkyl or alkoxy group as a tail group, represented by the structure -C n H2n+i- or -C n H2n+iO-, where n is an integer.
  • the omniphobic layer can be formed as a mixture of this compound and at least one further, second organosilicon compound, wherein the second organosilicon compound has a C chain length L2 of the tail group which differs only slightly with regard to the length of its longest alkyl or alkoxy group or has a comparable chain length, which is understood in particular to mean that AL is less than or equal to 0.25, preferably less than or equal to 0.15, in particular less than or equal to 0.1.
  • a long-chain(er) organosilicon compound does not have to be in its pure form, but that the omniphobic layer can be formed from a mixture of two or more organosilicon compounds which differ only slightly in terms of their chain length, according to the above definition, good omniphobic properties can be obtained combined with an economical production process which can be produced with a reasonable synthesis effort due to a reduced demand on the purity of the synthesized substance.
  • the omniphobic layer can be formed as a mixture of this compound and at least one further, second organosilicon compound, wherein the second organosilicon compound has a C chain length L2 of the tail group which differs significantly from the first with regard to the length of its longest alkyl or alkoxy group, which is understood in particular to mean that AL is greater than or equal to 0.5, preferably greater than or equal to 0.75, particularly preferably greater than or equal to 0.9, in particular at most 1.
  • an omniphobic layer which has properties which are improved compared to an omniphobic layer comprising only one organosilicon compound.
  • the addition of the second substance having a significantly shorter alkyl or alkoxy chain of the tail group can achieve the positive effect that this substance can cover those areas on the surface of the vitreous body, or the silicon dioxide layer arranged there, when the omniphobic layer is formed, which the comparatively long-chain first substance cannot cover due to steric hindrance, in order to achieve a higher Degree of coverage or a more seamless coverage of the glass body with the (or during the formation of the) omniphobic layer, which in turn achieves improved omniphobic properties and improved cleaning resistance.
  • the coupling groups can also lead to the formation of cross-linking through covalent bonding of the coupling groups of neighboring molecules, since not all coupling groups bind to the surface of the glass body or a silicon oxide layer arranged there. Both the van der Waals interaction and the cross-linking lead to the shielding of the substrate surface and the coupling groups, which improves the cleaning resistance of the omniphobic layer.
  • the above-mentioned organosilicon compounds are suitable for forming the omniphobic layer, which have a substantially linear molecular structure, which is understood in particular to mean the presence of a substantially linear alkyl chain as a tail group.
  • a non-linear silicon-organic compound is also preferably suitable for forming the omniphobic layer, which includes silicon-organic compounds whose molecular structure is non-linear, having, for example, at least one branch, and/or a cyclic structure, in particular a ring structure, and/or a dipodal structure.
  • Such branching is understood to mean, on the one hand, the presence of a substance with an alkyl or alkoxy group as a tail group, which has a branch within this chain, such as the substance isobutyl(trimethoxy)silane or isooctyl(trimethoxy)silane.
  • the branching of the isobutyl(trimethoxy)silane is caused by two methyl groups (CHs group) at the end of the alkyl chain.
  • Isooctyl(trimethoxy)silane has a branched structure, caused by three methyl groups (CHs group) at the end of the alkyl chain and a methyl side group within the alkyl chain.
  • this can also be understood to mean an organosilicon compound in which an additional, further alkyl group is present as a tail group, which is additionally bonded to the Si atom (to the first alkyl group), such as the substance n-octadecylmethyldimethoxysilane (CAS 70-851-50-2 with the formula C 2 iH 46 O 2 Si).
  • n-octadecylmethyldimethoxysilane CAS 70-851-50-2 with the formula C 2 iH 46 O 2 Si.
  • non-linear, in particular cyclic, compounds having a ring structure preferably as an organosilicon compound, optionally in pure form or in a mixture with a second or several further linear or non-linear compounds, are also suitable for forming such an omniphobic layer.
  • Aromatic silanes and/or cyclic azasilanes are particularly suitable here, the former of which are characterized by one (or more) aromatics, which is understood to mean an aromatic structure, within or at the end of the alkyl chain(s).
  • the cyclic azasilanes have a cyclic structure containing a nitrogen atom and one or more alkyl or alkyl ether chains, with a ring-opening reaction taking place during the bonding.
  • the group of cyclic azasilanes in particular is characterized by a comparatively high vapor pressure, which preferably enables gas phase reactions. This also advantageously enables alternative, in particular solvent-free, production processes for the omniphobic layer containing this compound(s), such as, for example, gas phase deposition processes familiar to the person skilled in the art.
  • Examples of compounds from the group of cyclic azasilanes would be N-methyl-aza-2,2,4-trimethylsilacyclopentane (CAS 18387-19-4 with the formula CyHiyNSi) or Nn-butyl-aza-2,2-dimethoxysilacyclopentane (CAS 618914-44-6 with the formula CgH2iNO2Si).
  • Examples of aromatic silane compounds would be 4-phenylbutyltrichlorosilane (CAS 17886-88-3 with the formula CioH C Si) or 3-phenoxypropyltrichlorosilane (CAS 60333-76-8 with the formula CgHnChOSi).
  • a dipodal silicon-organic compound is also preferably suitable for forming the omniphobic layer.
  • Dipodal silicon-organic compounds are characterized by two silicon atoms, each with one or more coupling groups, as described above, and one or more tail groups, as described above. The presence of a higher number of coupling groups can promote the bonding to the glass surface and thus improve the durability of the omniphobic layer.
  • Compounds which have a dipodal structure are, for example, 1,2-bis(trimethoxysilyl)decane (CAS 832079-33-1 with the formula Ci6H380eSi2), 1,8- bis(triethoxysilyl)octane (CAS 52217-60-4 with the formula C2oH460eSi2), 1,10-bis(trimethoxysilyl)decane (CAS 122185-09-5 with the formula Ci6H380eSi2) or bis(trimethoxysilylethyl)benzene (CAS 266317-71 -9 with the formula Ci6H3oOeSi2).
  • 1,2-bis(trimethoxysilyl)decane CAS 832079-33-1 with the formula Ci6H380eSi2
  • 1,8- bis(triethoxysilyl)octane CAS 52217-60-4 with the formula C2oH460eSi2
  • the omniphobic layer comprises a mixture which comprises at least one compound having a substantially linear molecular structure and a compound having a non-linear molecular structure, or a mixture of at least two compounds, each of which has a non-linear structure.
  • the omniphobic layer comprises a mixture of at least two organosilicon compounds, with at least one of the organosilicon compounds comprising at least one pentafluorophenyl group, represented by the structure -CeFs.
  • the organosilicon compound contains no trifluoromethyl group and no difluoromethylene group and is therefore not affected by a possible ban on substances containing PFAS.
  • the compound having this group can be stabilized by the other or the other compounds, so that the previously mentioned directed orientation advantageously takes place, in which in particular the pentafluorophenyl group points away from the surface to be coated, in order to achieve the best possible omniphobic properties.
  • the omniphobic layer forms a contact angle with respect to water of at least 100° and a contact angle with respect to hexadecane of at least 25°.
  • the omniphobic layer forms a contact angle with respect to water of 100° to 110° and with respect to hexadecane of 35° to 45°, i.e. even after the aforementioned 2,000 plaster strokes, there is only a slight change in this value.
  • the omniphobic layer preferably comprises a mixture of two, particularly preferably two or more, in particular a plurality of, organosilicon compounds, which are formed as characterized above and by combining different organosilicon compounds, having different or differently long alkyl or alkoxy chains, and/or having different molecular structures (linear, branched, ring-shaped, cyclic, dipodal), omniphobic layers with advantageous properties can be formed.
  • the omniphobic layer comprises as organosilicon compounds a mixture of the compounds Hexadecyltrimethoxysilane with a C-chain length of C16 and octadecyltrimethoxysilane with a C-chain length of C18.
  • An omniphobic layer comprising the above-mentioned mixture is characterized by improved omniphobicity and durability compared to the individual compounds.
  • the omniphobic layer comprises, as organosilicon compounds, the compound hexadecyltrimethoxysilane with a C-chain length of C16 in a mixture with at least one compound optionally having a C-chain length of C1 or C3.
  • a long-chain compound in combination with a compound having a short alkyl chain of a methyl group (CHs group) or a propyl group (CH2-CH2-CH3), an improved coverage of the surface to be provided with the omniphobic layer can advantageously be achieved.
  • the omniphobic layer comprises, as organosilicon compounds, the compound octadecyltrimethoxysilane with a C-chain length of C18 in a mixture with at least one compound optionally having a C-chain length of C1 or C3.
  • a long-chain compound in combination with a compound having a short alkyl chain of a methyl group (CHs group) or a propyl group (CH2-CH2-CH3), an improved coverage of the surface to be provided with the omniphobic layer can advantageously be achieved.
  • the omniphobic layer comprises as a first organosilicon compound a compound having a substantially linear alkyl or alkoxy chain, preferably hexadecyltrimethoxysilane or octadecyltrimethoxysilane, in a mixture with a second organosilicon compound having a branched alkyl or alkoxy chain, preferably isobutyl(trimethoxy)silane or isooctyl(trimethoxy)silane.
  • This combination of a compound having a substantially linear and a compound having a branched alkyl or alkoxy chain is advantageously characterized by improved Properties, in particular improved omniphobicity and improved durability, since the branched alkyl or alkoxy chain leads on the one hand to better shielding of the coupling group and on the other hand to improved durability of the layer.
  • the omniphobic layer has as the first organosilicon compound a compound having a substantially linear alkyl or alkoxy chain, preferably hexadecyltrimethoxysilane or octadecyltrimethoxysilane, in a mixture with a second organosilicon compound which has a ring-shaped or cyclic structure, preferably this second compound is an aromatic silane such as 4-phenylbutyltrichlorosilane or 3-phenoxypropyltrichlorosilane, particularly preferably this second compound is a cyclic silane, in particular a cyclic azasilane, such as N-methyl-aza-2,2,4-trimethylsilacyclopentane or N-n-butyl-aza-2,2-dimethoxysilacyclopentane.
  • this second compound is an aromatic silane such as 4-phenylbutyltrichlorosilane or 3-phenoxypropyltrichlorosilane, particularly
  • This combination of a compound with a substantially linear and a compound with a ring-shaped or cyclic alkyl or alkoxy chain is advantageously characterized by an increased vapor pressure due to the increased molecular weight of the ring-shaped or cyclic alkyl or alkoxy chain and is therefore particularly well suited for evaporation processes in the formation or production of the omniphobic layer.
  • the omniphobic layer has as the first organosilicon compound a compound having a substantially linear alkyl or alkoxy chain, preferably hexadecyltrimethoxysilane or octadecyltrimethoxysilane, in a mixture with a dipodal silane, preferably in a mixture with 1,2-bis(trimethoxysilyl)decane, 1,8-bis(triethoxysilyl)octane, 1,10-bis(trimethoxysilyl)decane or bis(trimethoxysilylethyl)benzene.
  • a mixture is advantageously characterized by an improved durability of the coating, since the dipodal structure provides more bonding options.
  • the omniphobic layer comprises hexadecyltrimethoxysilane or octadecyltrimethoxysilane in a mixture with a Siloxane, preferably in a mixture with polydimethylsiloxane (PDMS).
  • PDMS polydimethylsiloxane
  • the omniphobic layer comprises at least docosyltriethoxysilane (CAS 1604813-39-9) with the chemical formula C2sH6o03Si with a C-chain length of C22 as an organosilicon compound.
  • docosyltriethoxysilane is generally a mixture of substances with C-chain lengths of C18 to C24, preferably from C20 to C24.
  • Very good omniphobic properties can advantageously be achieved with an omniphobic layer comprising docosyltriethoxysilane as an organosilicon compound, since the omniphobic properties increase with increasing chain length.
  • a further aspect of the invention relates to a method for producing an omniphobic coating on a glass body, comprising the following steps:
  • the first step of the method for producing an omniphobic coating on a glass body comprises providing a glass body.
  • an object is used or provided as the glass body which can be used as an optical material, for example as an ophthalmic lens or as a spectacle lens.
  • the glass body is not limited to ophthalmic lenses and can be any transparent or optical object to which a coating can be applied in particular. Specific examples of this are glasses such as crown glass, mineral glass, window glass, flat glass, windshields or viewing windows or elements of optical sensors, light sources or photographic lenses or plastics such as polyacrylates or ceramics.
  • the glass body preferably consists of a clear or transparent plastic, for example a transparent plastic substrate, which can be treated or untreated.
  • the glass body is formed, for example, essentially from polythiourethane, polymethyl methacrylate, polymethyl acrylate, polycarbonate, polyacrylate or polydiethylene glycol bisallyl carbonate, although other transparent plastic materials can also be used.
  • the glass body is formed essentially from an acrylate polymer, such as polymethyl methacrylate or polymethyl acrylate.
  • the glass body can be formed with at least partially substantially flat surfaces or surfaces and/or with at least partially substantially curved surfaces or surfaces.
  • the glass body may already have one or more functional layers.
  • Suitable functional layers include, for example, a primer coating to increase the breaking strength, a hard coating to increase the scratch resistance, a non-stick layer or easy-to-clean layer, a conductive layer to improve antistatic properties, a mirroring layer or multi-layer mirroring coating, an anti-reflective layer or multi-layer anti-reflective coating, a coloring layer, etc.
  • the glass body can be provided in a (raw) round form, in particular with a view to its later use as a lens or spectacle lens, or it can already have been ground, which means that the glass body has already undergone a process step of shaping or edge processing and is no longer in a (raw) round form, but has a different predetermined shape, in particular a different predetermined shape due to its later use as a lens or spectacle lens.
  • the glass body to be provided in the first process step already has a silicon oxide layer which is arranged directly or indirectly on a surface of the glass body. If the glass body to be provided in the first process step If the glass body to be provided does not have such a silicon oxide layer, then in a further development of this, in this first method step a silicon oxide layer can first be applied, arranged or formed, directly or indirectly, on a surface of the glass body.
  • the silicon oxide layer can be formed by evaporating silicon monoxide (SiO), silicon dioxide and/or silicon or a mixture thereof in a PVD process in a vacuum, whereby monomolecular SiO is formed in the gas phase (hence the term PVD process for the English term physical vapor deposition) and is deposited in a thin layer on the glass body, for example the optical lenses.
  • the layer of silicon oxide is deposited as silicon monoxide (SiO), low-valent silicon oxide (e.g. Si20s) or silicon dioxide (SiO2) or as a mixture of two or three of the aforementioned materials.
  • the surface of the glass body or the optical lenses are thereby advantageously hardened, but in particular also prepared for a covalent bond with a slip-promoting omniphobic layer which is formed on the silicon oxide layer.
  • the second method step following the first method step comprises the formation of a slip-promoting, omniphobic layer on the glass body.
  • a slip-promoting, omniphobic layer in particular a slip-promoting omniphobic layer according to the previous aspect of the invention, is formed on the glass body provided in the previous method step or (at least) on a silicon oxide layer arranged directly or indirectly on its surfaces.
  • a glass body in particular a coated glass body or coated glass or coated spectacle lens, which has an omniphobic layer which is preferably characterized in that it has at least one organosilicon compound and this omniphobic layer gives the glass body preferably hydrophobic and/or oleophobic properties, preferably a contact angle, determined immediately after production or formation, with respect to water of 100° to 110° and compared to hexadecane from 35° to 45°.
  • the formation of the omniphobic layer can comprise applying the organosilicon compound(s) forming the omniphobic layer neat or in solution, for example by dripping or dipping the glass body (also referred to as dip coating). If the omniphobic layer to be formed is formed from a mixture comprising at least two or more organosilicon compounds, these compounds are mixed in a solution, particularly preferably in an isopropanol solution, in accordance with the mixing ratio to be obtained.
  • the solution preferably contains at least one of the following substances: an acid, in particular sulfuric acid, an organic solvent, preferably a non-cyclic alcohol (in particular ethanol or isopropanol), an ether (in particular tetrahydrofuran (C 4 H 8 O)), dimethylformamide (C3H7NO), dimethyl sulfoxide (C2H6OS), hexane, decane, hexadecane, octadecane, chloroform, diiodomethane (CH2I2), dichloromethane or a cyclic solvent, such as toluene (CyHs) or xylenol (in particular 2,5-xylenol).
  • an acid in particular sulfuric acid
  • an organic solvent preferably a non-cyclic alcohol (in particular ethanol or isopropanol), an ether (in particular tetrahydrofuran (C 4 H 8 O)), dimethylformamide (C3H7NO
  • the solution preferably contains toluene (CyHs), particularly preferably isopropanol (CsHsO).
  • the organosilicon compound(s) can also be wiped onto the surface of the glass body to be coated.
  • a cloth or rag can be wetted, for example by dripping or soaking it with the organosilicon compound(s) or by immersing it in a solution containing the organosilicon compound(s).
  • the organosilicon compound(s) is then applied, distributed or wiped onto the surface of the glass body using the soaked cloth or rag by wetting the surface of the glass body to be coated.
  • the exposure time can be several hours, preferably up to 1 hour, with typical exposure times being a few minutes to a few seconds.
  • the exposure time is preferably 1 to 5 minutes, more preferably less than 3 minutes, particularly preferably less than 1 minute, in particular less than 10 seconds.
  • Particularly economical production processes can advantageously be implemented by appropriately short exposure times, which are achieved by short Exposure times allow a high throughput and can in particular be carried out (partially) automatically, preferably as part of an existing (partially) automated production line.
  • the method can adhere to a cycle time specified by an existing production line through correspondingly short exposure times in the seconds to minutes range, or the method can be adapted to a specified cycle time by suitable choice of exposure time.
  • the formation of the coating by wetting or immersion can be carried out in a simple manner.
  • a tempered solution can preferably also be used, ie a solution in accordance with the aforementioned specifications which is heated to a predefined temperature in order to accelerate the bonding reaction in this way.
  • a catalyst preferably an acidic catalyst, can also be provided in order to advantageously influence or accelerate the bonding reaction in this way.
  • the wetting or immersion can also be carried out twice, three times or several times, in particular with a time interval which can more preferably be such that the surface of the glass body dries partially or completely in the meantime.
  • the formation of the omniphobic layer can preferably comprise an evaporation process, in particular a vapor deposition or evaporation process carried out in a high vacuum coating system under vacuum conditions, preferably at a pressure of less than or equal to 10' 4 mbar, particularly preferably at a pressure of less than or equal to 10' 5 mbar.
  • a tablet or a pill is generally present as a carrier, which, in addition to other components, such as a carrier material, contains the organosilicon compound(s).
  • a carrier material can be, for example, porous ceramic bodies or metal bodies, preferably made of stainless steel and/or copper, filled with steel wool. Due to their large surface area, these carrier materials can store liquids well.
  • the organosilicon compound(s) in liquid form in such carrier materials and, as a rule, at least 10 mg are contained therein. preferably between 45 mg and 300 mg, particularly preferably between 90 mg and 270 mg.
  • the at least one organosilicon compound or a mixture of several organosilicon compounds can be present both pure and in solution, i.e. with a suitable solvent, stored therein.
  • These carriers are preferably heated in a thermal evaporator, preferably by the heat output falling across an ohmic resistance at a current strength of between 4 and 6 amps, whereby the substance is caused to evaporate, the vapor that forms containing the organosilicon compound(s) being deposited as a precipitate to form the omniphobic layer.
  • the heating can also take place using an electron beam. If one (or several) glass bodies are exposed to this vapor precipitation, the organosilicon compound(s) contained in the precipitate are deposited on its surface(s). In this way, an omniphobic layer is formed on one (or several) glass bodies by means of an evaporation process, in particular a thermal one. By means of suitable support or orientation, it can be ensured that the vapor deposition takes place preferably on one (or the) surface(s) of the glass body(s) on which a silicon oxide layer is arranged. In general, such an omniphobic layer has a physical layer thickness of a few to about 50 nanometers, in particular a layer thickness between 5 and 25 nanometers.
  • the growth of the omniphobic layer is preferably less than 2 nm/s, in particular less than or equal to 1.5 nm/s. This can advantageously ensure that the omniphobic layer does not grow too quickly and in this way a coverage that is as homogeneous as possible, in particular without gaps, takes place.
  • the organosilicon compound(s) can also be coated by spraying (spray coating) and/or by spin coating.
  • different solvents and/or additional components are added to the solution containing the organosilicon compound(s) to modify properties such as viscosity, surface tension and/or solids content.
  • the method preferably has an additional, optional step which comprises a pretreatment or activation of the glass body provided, in particular this step comprises a formation of reactive OH groups, preferably a formation of reactive OH groups on the silicon oxide layer arranged on (at least) one area or surface of the glass body.
  • a pretreatment or activation of the glass body comprises a formation of reactive OH groups, preferably a formation of reactive OH groups on the silicon oxide layer arranged on (at least) one area or surface of the glass body.
  • Such an optional pretreatment step preferably takes place after the glass body has been provided and before an omniphobic layer has been formed. This can advantageously improve the adhesion or adherence of the omniphobic layer to the glass body, because the formation of reactive OH groups promotes the covalent bonding of the coupling groups of the organosilicon compound(s) of the omniphobic layer as part of a hydrolysis reaction, which in turn advantageously achieves an improved durability of the omniphobic layer.
  • Such a pretreatment can preferably comprise an activation method such as a plasma and/or an ion treatment.
  • an Ar plasma 90s/120V 10sccm Ar
  • an O2 plasma 90s/120V 10sccm Ar 10sccm 02
  • the silane or organosilicon compound contained in the solution forms a (covalent) bond(s) with the silicon oxide layer on the glass body. This binds them to the silicon oxide layer and fixes them locally, so that a coating is formed on the glass body, which is particularly promoted by the formation of reactive OH groups. A good chemical bond to the glass body is essential for the coating to last a long time. necessary.
  • a silicon oxide layer can be applied to glass bodies by flame coating, vapor deposition, etc. and a plasma treatment can be carried out to form OH groups.
  • a plasma treatment can be carried out to form OH groups.
  • On mineral glass a (atmospheric pressure) plasma treatment can be used for this purpose.
  • the aim is to form reactive OH groups on the surface of the glass body, to which the coating that is then applied chemically binds.
  • Such pretreatment usually takes a few minutes, preferably between 60 and 120 seconds, depending on the intensity of the plasma or ion treatment.
  • the method preferably has an additional, optional method step, preferably downstream of the step of forming an omniphobic layer, in which the (coated) glass body is cleaned or rinsed with a solvent, for example toluene or isopropanol, or with (demineralized or deionized) water.
  • a solvent for example toluene or isopropanol, or with (demineralized or deionized) water.
  • this method step is carried out after the method step of forming the omniphobic layer, excess material, in particular excess organosilicon compounds which have not formed a (covalent) bond with the glass body, can be removed.
  • the method preferably has an additional, optional process step in which drying or tempering of the (coated) glass body takes place.
  • the drying can preferably take place to solidify the formed omniphobic layer, optionally at room temperature or in a drying device provided for this purpose, for example in a tempering oven.
  • a Subsequent drying or tempering takes place at temperatures of less than 100 °C in order not to damage glass bodies made of plastic materials in particular, since plastics are known to have a lower heat resistance than, for example, mineral glasses or semiconductors.
  • the preferred plastic materials for plastic lenses or spectacle lenses lose their mechanical strength at temperatures of over 100 °C, especially at temperatures of 150 °C or more, which is why a temperature of around 50 °C is particularly preferred in order not to damage the coated glass body made of plastic.
  • the duration of the drying step is a few minutes to several hours, preferably between 1 minute and 10 hours, particularly preferably between 5 and 60 minutes.
  • the optional process steps can be arranged in any order and that, if both optional process steps are present, for example, both a process sequence with the steps “provision / (pretreatment or activation) / formation / drying / cleaning” and a sequence with the steps “provision / (pretreatment or activation / activation) / formation / cleaning / drying” are equally valid and the choice of the preferred order depends on various factors, such as the applied silicon-organic compound(s), the process for forming the layer, as well as the solvent components, and in particular also on the concentration or amount of carrier material.
  • the glass body provided is first cleaned (or wetted) after provision, optionally (pre-)dried, and then the omniphobic layer is formed, possibly supplemented by optional downstream steps such as cleaning and drying or drying and cleaning.
  • a provided glass body can be produced or provided with an omniphobic layer or such an omniphobic layer, in particular an omniphobic layer according to a previous aspect of the invention.
  • the method steps always refer to a glass body in the singular, the proposed method can be easily extended to several glass bodies, in particular to a large number of glass bodies, by the person skilled in the art, and thus a method is also explicitly proposed which can provide a plurality or large number of glass bodies with an omniphobic layer in a particularly economical manner or can form such a layer on them in order to obtain a large number of coated lenses, in particular a large number of coated spectacle lenses.
  • An exemplary method for manufacturing spectacle lenses could include the following steps:
  • the glasses or glass bodies made of mineral glass or plastic glass can be hard-coated and coated with a multi-layer anti-reflective coating in high-vacuum vapor deposition systems. After the last single layer of silicon oxide (particularly SiO2), the surfaces are irradiated with a plasma or ion source in the vapor deposition system.
  • the process parameters of this plasma treatment are chosen in such a way that the H2O contact angle of the treated surface is significantly reduced by the formation of polar OH groups.
  • the surface should not be noticeably damaged, which means that the reflective color of the glass body should remain essentially unchanged and the roughness and scattered light should not increase significantly or noticeably.
  • the plaster resistance which will be determined later, should be as good as possible.
  • the process parameters in a vapor deposition system depend on the type of system and the determination of the duration, the bias voltage (also referred to as acceleration voltage), the discharge current, the argon flow, the oxygen flow, the choice of the ion source and the duration of the activation of this ion source and the voltage and current during operation are parameters whose determination is within the scope of professional action and must be tested accordingly based on calculations and experience.
  • a plasma source are a duration of about 50s to 70s, in particular about 60s, a bias voltage: from about 100V to about 140V, in particular about 120V, a discharge current of about 25A to about 35A, in particular about 30A, an argon flow of about 5sccm to about 15sccm, in particular about 10sccm (sccm are standard cubic centimeters per minute).
  • Typical process parameters in another preferred vapor deposition system of the type Syrus 1105 (manufacturer: Leybold) with the Mark II ion source are a duration of about 100s to 150s, in particular about 120s, an anode voltage of about 100V to about 180V, in particular about 140V, a discharge current of about 1A to about 3A, in particular about 2A, an argon flow of about 2sccm to about 10sccm, in particular about 5sccm (sccm are standard cubic centimeters per minute).
  • the solution can preferably have a temperature of 15 degrees Celsius to 40 degrees Celsius, particularly preferably around 20 degrees Celsius, whereby the temperature of the solution advantageously corresponds approximately to room temperature and no heating or cooling is necessary.
  • the solution preferably contains all components to carry out an acid-catalyzed polycondensation of a silane or an organosilicon compound, e.g. hexadecyltrimethoxysilane, on the surface of the glass body.
  • a silane or an organosilicon compound e.g. hexadecyltrimethoxysilane
  • the organosilicon compound(s) or the silane can be applied either pure or as a solution in toluene or isopropanol, preferably in a dipping process or by immersion.
  • a typical exposure time is a few minutes, preferably 1 to 5 minutes, more preferably less than 3 minutes, in particular around 5 seconds. As a variation of this, significantly longer exposure times would also be conceivable, in particular exposure times in the range of several hours.
  • drying After removing the glass body from the immersion bath, drying can take place at room temperature or at higher temperatures.
  • the polycondensation or polymerization of the coating can already take place in the solution and/or during drying. Therefore, the ambient conditions influence the polymerization and thus the coating result.
  • the drying temperature is preferably below about 50 degrees Celsius, more preferably the drying temperature is between 25 degrees Celsius and 45 degrees Celsius.
  • the relative humidity of the ambient air during drying is preferably below 50%, more preferably between about 20% and about 40%.
  • the coated glass body can be cleaned after drying, for example using (demineralized) water and/or isopropanol and/or toluene and/or an alcohol or by wiping.
  • the immersion and drying can be repeated once, twice or several times.
  • the smooth coating meets the following quality criteria:
  • the contact angle of water is significantly above 90 degrees, usually in the range of 95 to 110 degrees.
  • the coating is at least much easier to clean under everyday conditions than a SiO2 surface.
  • Fig. 1 shows a section according to a first embodiment of a coated glass body, wherein the omniphobic layer comprises an organosilicon compound
  • Fig. 2 is a schematic representation of an organosilicon compound
  • Fig. 3 shows a section of a second embodiment of a coated glass body, wherein the omniphobic layer comprises a mixture of two organosilicon compounds with a comparable C chain length;
  • - Fig. 4 shows a section of a third embodiment of a coated glass body, wherein the omniphobic layer comprises a mixture of two organosilicon compounds with different C chain lengths;
  • FIG. 5 is a schematic drawing of a process for producing an omniphobic coating on a glass body
  • FIG. 6 is a schematic drawing of a further development of the method from Fig. 5 comprising optional method steps, which are shown in dashed lines.
  • Figure 1 shows a section according to a first embodiment through a coated glass with a glass body 2, a silicon oxide layer 4 and an omniphobic layer 6.
  • the glass body 2 is designed as an ophthalmic lens or as a spectacle lens semi-finished product 2.
  • transparent plastic substrates are used for this purpose, which can be formed, for example, essentially from polythiourethane, polymethyl methacrylate, polymethyl acrylate, polycarbonate, polyacrylate or polydiethylene glycol bisallyl carbonate.
  • the glass body 2 of the embodiment shown is already provided with at least one functional layer 3, for example a primer coating, a hard layer, a conductive layer, an anti-reflective layer, a coloring layer, a photochromic layer or a combination thereof, etc.
  • a functional layer 3 for example a primer coating, a hard layer, a conductive layer, an anti-reflective layer, a coloring layer, a photochromic layer or a combination thereof, etc.
  • the glass body 2 was further provided with a silicon oxide layer 4, in particular made of silicon dioxide, which in the preferred embodiment shown is arranged indirectly, in this case by means of the functional layer 3 on the (preferably convexly curved) surface of the glass body 2.
  • the silicon oxide layer can preferably be formed or vapor-deposited together with the functional layer 3 in a PVD process within a system.
  • this allows the silicon oxide layer to be produced in a simple manner within the normal manufacturing process for spectacle lenses.
  • a plasma treatment with a pure argon plasma is carried out at an argon flow of 10 sscm and a bias voltage of 120 V for a period of 90 s for the purpose of forming reactive OH groups on the surface of the silicon oxide layer 4 as a binding partner for the covalent bonding of the omniphobic layer 6.
  • the omniphobic layer 6 is formed by wetting the silicon oxide layer 4 with a solution containing hexadecyltrimethoxysilane as the preferred organosilicon compound in isopropanol. The exposure time is approximately 2 minutes. The glass body is then rinsed with isopropanol, in particular to remove unbound compound components, whereby a stable omniphobic layer 6 is formed on the glass body.
  • Figure 2 shows a schematic representation of hexadecyltrimethoxysilane as a preferred organosilicon compound 8 for forming an omniphobic layer 6 on a glass body 2, which, starting from its silicon atom 801, has three methoxy groups as coupling groups 802 for attachment, and an alkyl chain having sixteen carbon atoms as functional group 803, responsible for the omniphobic properties.
  • the coupling groups 802 can also be referred to as head groups and are generally hydrolyzable groups, preferably chloro groups, particularly preferably ethoxy groups, in particular alkoxy groups.
  • the functional group 803 is also referred to as tail group.
  • head group and tail group indicate the orientation of the hexadecyltrimethoxysilane 8 during the formation of the omniphobic layer 6, in which the hexadecyltrimethoxysilane 8 forms a bond with the silicon oxide layer 4 arranged on the glass body 2 by means of one of the (or several or all) head or coupling groups 802, ie the coupling or head groups 802 are oriented towards the glass body 2 in the preferred arrangement, whereas the tail group 803 is oriented away from the glass body 2.
  • This on the one hand, realizes the connection to the glass body 2 (or to the silicon oxide layer 4 arranged on the glass body 2) and, on the other hand, the compound 8 with its alkyl chain of the tail group 803 can achieve the desired omniphobic effect.
  • Figures 3 and 4 show further embodiments of the coated glass body 2 shown in Figure 1. For this reason, only the differences are described below and for elements with the same or recurring reference symbols, reference is made to the explanation already given above.
  • Figure 3 shows a section according to a second embodiment, in which the omniphobic layer 6 has a mixture comprising octadecyltrimethoxysilane as the preferred compound for the first organosilicon compound 81 and hexadecyltrimethoxysilane as the preferred compound for the second organosilicon compound 82.
  • organosilicon compounds in this mixture which have chain lengths of comparable length and the difference AL here is AL « 0.11, whereby the two compounds can advantageously stabilize each other due to their comparable chain length.
  • an omniphobic layer is formed in which, due to the mutual stabilization, in particular the tail groups which cause the omniphobic properties are stably oriented away from the surface of the silicon oxide layer 4.
  • the two compounds are present in the mixture in a ratio of 1:1, i.e. the two compounds are present in equal parts in the mixture.
  • the omniphobic layer 6 is formed by wetting the silicon oxide layer 4 with a solution in isopropanol, in which isopropanol acts as a solvent and the solutes are an equal mixture of octadecyltrimethoxysilane as the preferred compound for the first organosilicon compound and hexadecyltrimethoxysilane as the preferred compound for the second organosilicon compound.
  • the exposure time is approximately 2 minutes.
  • the glass body is then rinsed with isopropanol, in particular to remove unbound compound components, whereby a stable omniphobic layer 6 is formed on the glass body, which has at least two organosilicon compounds.
  • the trimethoxy-n-octylsilane can fill those gaps or spaces that inevitably form between the individual octadecyltrimethoxysilane molecules 81 due to steric hindrance.
  • the advantageous arrangement of short-chain trimethoxy-n-octylsilane molecules 83 between the long-chain octadecyltrimethoxysilane molecules 81, a gapless coverage of the silicon oxide layer 4 and a nanostructure at the molecular level can advantageously be achieved, whereby an omniphobic layer 8 with excellent omniphobic properties is formed on the glass body 2.
  • the two compounds are present in the mixture in a ratio such that the short-chain trimethoxy-n-octylsilane compound 83, with a proportion of approximately 80% of the mixture, is in excess of the long-chain octadecyltrimethoxysilane compound 81.
  • Figure 5 shows a schematic drawing of a method for producing an omniphobic coating on a glass body 2, in particular on a spectacle lens, according to the second aspect of the invention.
  • the glass body 2 to be provided with an omniphobic coating 6 is first provided; in this step, a glass body 2 made of a mineral glass or plastic material, particularly preferably made of a (partially or semi-) transparent plastic material, which is suitable for later use as a lens, in particular as a spectacle lens, is preferably provided.
  • the omniphobic coating 6 is formed on the glass body 2, i.e., within the scope of this method step, the glass body 2 provided in step S100 is provided with an omniphobic layer e, in particular an omniphobic layer 6 according to the first aspect of the invention, or such an omniphobic layer e is formed on the glass body 2.
  • a coated glass or coated spectacle lens is available, ie within the scope of the process, a coated (spectacle) glass (body) was produced from a provided glass body 2.
  • FIG. 6 shows advantageous developments of the proposed method, shown schematically in Figure 5, according to the second aspect of the invention.
  • steps S100 and S104 reference is made at this point to the description of Figure 5 and the corresponding explanations of the general description.
  • the method shown here is further developed in such a way that after step S100 of providing a glass body 2, a pretreatment of the (provided) glass body 2 takes place in step S102, whereby the preferred pretreatment is understood to be an activation of one of the areas or surfaces of the glass body 2, in particular a plasma treatment for the formation of reactive OH groups on an area or surface of the glass body 2, in particular on a silicon oxide layer 4 arranged directly or indirectly on this area or surface.
  • This pretreatment for the formation of reactive OH groups can advantageously achieve improved adhesion or adhesion, since potential Binding partners are provided.
  • the at least one or more organosilicon compound(s) 8 can bind with their head or coupling groups 802 to the reactive OH groups formed, preferably as part of a hydrolysis reaction, and in this way form a covalent bond with the glass body.
  • step S106 of cleaning excess molecules of the omniphobic layer e that have not bonded to the glass body 2 or the silicon oxide layer 4 arranged thereon are removed from the surface, preferably by wiping or spraying the coated glass body 2 with optionally (demineralized) water and/or a cleaning agent or solvent, for example with toluene or isopropanol.
  • a cleaning agent or solvent for example with toluene or isopropanol.
  • step S108 The method proposed here is then advantageously further developed by a further, optional method step in which, after cleaning, drying or tempering of the coated glass body 2 takes place in step S108.
  • this drying or tempering step which preferably lasts from a few minutes to a few hours, preferably about 20 minutes, the coated glass body is exposed to a defined temperature, preferably a temperature of less than 100 °C, particularly preferably a temperature of about 50 °C, in order to achieve a solidification of the omniphobic layer e formed in step S104.
  • a (process) step sequence (not shown) would also be conceivable in which the steps S106 and S108 take place in an interchanged order, ie the coated glass 2 is first dried in a drying step S108, with the aim of solidifying the formed omniphobic layer 6. and then cleaned in step S106.
  • a condensation of the omniphobic layer e is to be achieved by supplying (heat) energy and then in the subsequent cleaning step S106 excess material which has not bonded with the glass body 2 during the condensation is to be removed.
  • a further drying step S108 can of course also be carried out following the cleaning in step S106, i.e. a process sequence of “provision / pretreatment (or activation) / formation / drying / cleaning / drying” would also advantageously be conceivable.

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Abstract

Un aspect de l'invention concerne un verre revêtu, en particulier un verre de lunettes, ayant un corps de verre (2) constitué d'un verre minéral ou d'un verre en plastique, une couche d'oxyde de silicium (4), qui est disposée directement ou indirectement sur une zone ou une surface du corps de verre (2), et une couche omniphobe (6) liée de manière covalente améliorant le glissement qui est formée sur la couche d'oxyde de silicium (4), la couche omniphobe (6) ayant au moins un composé organique de silicium. Un autre aspect de l'invention concerne un procédé de production d'une couche omniphobe sur un corps de verre.
PCT/EP2024/057763 2023-03-24 2024-03-22 Corps de verre revêtu Ceased WO2024200260A1 (fr)

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DE102024002054B3 (de) * 2024-06-24 2025-09-18 Rodenstock Gmbh Verfahren zum Ausbilden einer omniphoben Schicht

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