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
  • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
  • C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
  • C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K3/00—Materials not provided for elsewhere
  • C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
• • 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.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• • 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
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
• • 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
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249967—Inorganic matrix in void-containing component
• • 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
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249967—Inorganic matrix in void-containing component
  • Y10T428/249969—Of silicon-containing material [e.g., glass, etc.]
• • 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
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249978—Voids specified as micro
  • Y10T428/249979—Specified thickness of void-containing component [absolute or relative] or numerical cell dimension
• • 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]
  • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
  • Y10T428/31609—Particulate metal or metal compound-containing
  • Y10T428/31612—As silicone, silane or siloxane
• • 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

Definitions

• the present invention relates to a substrate, in particular transparent, and endowed with the hydrophobicity / oleophobicity property with a view to obtaining certain anti-rain / anti-fouling effects or also with the hydrophilicity / oleophilicity property, or of a character photocatalytic, associated respectively with anti-fog / anti-frost and also anti-fouling effects, or other properties: perfume ...
• such a substrate is, for example, provided with a coating in the frame various applications, such as glazing for aeronautical, maritime, land (rail, road) transport vehicles, for building (windows), street furniture (display panel, Bus shelters, etc.) or interior fittings ( decorative panel, furniture, household appliances (refrigerator door, oven, display case, ceramic hob), kitchen utensils, sanitary furniture (sink, bathtub ...), building materials, etc.
• glazing for aeronautical, maritime, land (rail, road) transport vehicles, for building (windows), street furniture (display panel, Bus shelters, etc.) or interior fittings ( decorative panel, furniture, household appliances (refrigerator door, oven, display case, ceramic hob), kitchen utensils, sanitary furniture (sink, bathtub ...), building materials, etc.
• the substrate is therefore transparent or not and generally consists of glass, ceramic, glass ceramic, metal, plastic (poly (methyl methacrylate) (PMMA), polyvinyl butyral (PNB), polycarbonate (PC) or polyurethane (PU), ethylene / vinyl acetate (ENA) thermoplastic, poly (ethylene terephthalate) (PET), poly (butylene terephthalate) (PBT), polycarbonate / polyester copolymers, cycloolefinic copolymer of the ethylene / norbornene or ethylene / cyclopentadiene type, ionomer resins, for example an ethylene / (meth) acrylic acid copolymer neutralized by a polyamine, thermosets or thermosettable such as polyurethane, unsaturated polyester (UPE), ethylene / acetate copolymer vinyl ...) or a combination of several of these materials.
• PMMA poly (methyl methacrylate)
• PBB polyvinyl butyral
• hydrophobicity / oleophobia The property of hydrophobicity / oleophobia to which reference is made is that polar or non-polar liquids do not adhere to the substrate by forming a troublesome film. A substrate with this property will have a weak or almost zero tendency to retain dust or dirt of all kinds, fingerprints, insects, etc.
• the hydrophobicity / oleophobicity - or non-wettability - property of a substrate consists in that the contact angles between a liquid and this substrate are high, for example at least 90 ° for water. The liquid then tends to flow easily, in the form of drops, on the substrate, by simple gravity if the substrate is inclined or under the effect of aerodynamic forces in the case of a moving vehicle.
• Agents known to confer this hydrophobicity / oleophobicity property are, for example, fluorinated alkylsilanes as described in patent applications EP 0 492 417, EP 0 492 545 and EP 0 672 779.
• Common hydrophobic / oleophobic agents are, in particular, alkyl-trihalogeno- or -trialkoxy-silanes the alkyl group of which comprises at least one perfluorinated end, that is to say consisting of a group F3C- (CF2) n- in which n is a positive or zero integer, as described in patent application EP 0 719 743.
• alkyl-trihalogeno- or -trialkoxy-silanes the alkyl group of which comprises at least one perfluorinated end, that is to say consisting of a group F3C- (CF2) n- in which n is a positive or zero integer, as described in patent application EP 0 719 743.
• hydrophobic / oleophobic agents are applied in a known manner in solution according to conventional deposition methods with or without heating.
• hydrophobic / oleophobic coating is in fact affected by erosion which does not fail to occur more or less, for example during the cleaning operations of the substrate, periodically essential when the latter is transparent, when it is a question of restoring a vision satisfactory through the substrate.
• application EP 0 484 746 recommends the preparation of the substrate by a preliminary treatment using a primer of the tetrahalogeno- or tetraalkoxy-silane type.
• Application EP 0 497 189 A2 proposes, in accordance with a second approach, to create beforehand on the surface of the substrate irregularities of dimensions ranging, for example, between 1 and
• the inventors have now implemented a different technique capable of providing improved durability of the hydrophobic / oleophobic coatings of the types mentioned above.
• the subject of the invention is a substrate coated with a mesoporous film, characterized in that chemical molecules (in particular hydrophobic / oleophobic) are linked to the mesoporous film.
• mesoporous refers to pores of dimensions between 1, 2 and 40 nm, in particular between
• the substrate may be - but is not necessarily - transparent and in this case have excellent optical properties enabling it to meet the standards in use for glazing.
• Chemical molecules other than hydrophobic / oleophobic can also be bonded to the mesoporous film in order to form coatings of excellent durability.
• Antibacterial, anti-fungal, or classic perfume molecules can also be linked to the mesoporous film.
• the process of binding to the mesoporous film comprises, as the case may be, an impregnation and / or a polymerization in situ.
• the substrate is preferably made of a glass material or a plastic material of the type mentioned above. It can consist of a single sheet, a laminated sheet formed from several sheets assembled or else be a solid object whose surface intended to receive the mesoporous coating is smooth, in general, but not necessarily flat.
• the glass material in which one is likely to form the substrate is a glass, a ceramic or a glass ceramic.
• Glass is preferably used, in particular float glass of conventional composition, optionally hardened or tempered, an aluminum and sodium borosilicate or any other composition.
• the invention in no way excludes the interposition, between the glass and the mesoporous film, or on the side of the glass sheet opposite to that where the mesoporous film is located, of the usual functional layers for glazing: anti-stacking -reflective or, on the contrary, reflective layers, electrically conductive layers, decorative or with thermal properties such as low-emissivity, etc.
• the base of the mesoporous film comprises as essential constituent material at least one compound of at least one of the elements: Si, W, Sb, Ti, Zr, Ta, V, Pb, Mg, Al, Mn, Co, Ni, Sn, Zn.
• the mesoporous film has a periodic lattice at the domain scale of at least 20 nm.
• the mesoporous film comprises a multitude of identical geometric patterns characterized by a dimension of at least
• This characteristic dimension corresponds to a dimension of coherent diffraction domains and can be deduced in a known manner by Scherrer's formula from the width of the main peak - indexed 100 - from the X-ray diffraction diagram.
• the advantage of the periodicity at relatively large scale of the mesoporous network resides in the possibility of orienting the porous domains - corresponding to the elementary patterns mentioned above - in an orderly manner, for example all perpendicular to the substrate or all parallel to the substrate, in view, in particular in the latter case, obtain electrically conductive coatings.
• the mesoporous film is in fact conductive of electricity. It is then for example made up of sub-stoichiometric and / or doped metal oxides as described in application FR 2 695 1 17.
• ITO indium oxide doped with tin
• ZnO zinc oxide doped with indium (ZnO: In)
• fluorine ZnO: F
• aluminum ZnO: Al
• tin ZnO: Sn
• fluorine-doped tin oxide Sn ⁇ 2: F
• these materials are described as having properties of reflection in the infrared, in particular of low-emissivity.
• the ability of the mesoporous film to conduct electricity mainly targets, in the context of the present application, the antistatic function, that is to say the ability to dissipate electrostatic charges and to avoid their accumulation locally.
• the thickness of the mesoporous film is advantageously between 10 nm and 10 ⁇ m and, in particular, between 0.05 and 5 ⁇ m.
• the hydrophobic / oleophobic molecules are preferably chosen from the group consisting of: a) silicones, and b) compounds corresponding to the formulas:
• R is a linear or branched alkyl group or a hydrogen atom
• X is a hydrolyzable group such as a halo, alkoxy, acetoxy, acyloxy, amino, NCO group;
• a common compound corresponding to formula (II) is octadecyltrichloro silane.
• Polydialkylsiloxanes can be mentioned as silicones. Furthermore, compounds corresponding to formula (I) have already been described in application EP 0 799 873 A1, for example. On the other hand, the subject of the invention is also a method of manufacturing a substrate as described above, in which:
• the substrate is brought into contact with a composition of organic assembling groups and at least one precursor of the material constituting the mesoporous film, • the precursor precipitates around the organic assembling groups and its molecules grow, then
• this method is characterized in that chemical molecules, such as hydrophobic / oleophobic are then brought into contact in the form of a solution or of a gas containing them, with the mesoporous film.
• This method is remarkable in that it allows easy obtaining of pores of substantially monodisperse dimensions, between 1, 2 and 40 nm. The adjustment of this dimension can be obtained by an appropriate choice of organic assembling groups, that is to say for example of the more or less long length of the carbon chains constituting them.
• the durability of the hydrophobic / oleophobic function of the substrate, resulting from the contacting of hydrophobic / oleophobic molecules with the mesoporous film formed as just indicated, is excellent.
• a layer of primer in order to promote the adhesion of the mesoporous film to its support and / or simply to obtain a quality sufficient of this membership.
• a layer of isoelectric potential greater than or equal to the pH of said composition is deposited on the substrate, before it is brought into contact with the composition containing the precursor of the mesoporous material.
• a particularly favorable embodiment of the process of the invention consists in that the organic assembling groups consist of micelles of cationic surfactant molecules, the precursor of the mesoporous material is a silicon alkoxide, and they are in solution and, optionally, under hydrolyzed form.
• the cationic surfactant is cetyltrimethylammonium bromide
• the precursor of the mesoporous material is in solution in its form resulting from hydrolysis in an acid medium: Si (OH) 4 and the surfactant molar ratio: Si is between 10 ' 4 and 0.5.
• one of the major advantages of the technique used for implementing the invention lies in the possibility of varying the pore size of the mesoporous film in the set of values indicated above by a judicious choice of assembling groups.
• organic for these, anionic and nonionic surfactants and amphiphilic molecules can be used, for example block copolymers, etc.
• Another object of the invention consists of glazing for a building or transport vehicle of which at least part of the transparent surface consists of a substrate described above.
• a mesoporous silica film in accordance with the invention is deposited on three samples of silica-soda-lime float glass.
• a layer of alumina precipitate is deposited on the surface of each sample, the thickness of which, determined by atomic force microscopy, is approximately 5 nm.
• the operating protocol is as follows: A 10 ⁇ 2 M KOH solution is added to a solution containing
• the soil containing the TEOS and the CTAB is deposited on each sample by “spin coating”.
• the sample is rapidly rotating during the deposition; this spin coating operation is characterized by an acceleration of 1500 rpm, a speed of 2500 rpm and a rotation time of 30 s.
• the films are heated for a few hours at 100 ° C.
• the CTAB is then extracted from the film of each sample by calcination in a tubular oven at 400 ° C in air with a rise of 10 ° C / h.
• the film thus formed on the three samples is transparent, mesoporous and its thickness, determined by an atomic force microscope by moving the tip on the edge of the sample, is approximately 1 ⁇ m.
• the porous network corresponds to the volume left vacant by the elimination of the CTAB micelles, taking into account the contractions likely to occur during the heating / calcination operations, among others.
• the average pore diameter is approximately 3 nm.
• a first sample is treated by gas at reduced pressure and at room temperature with CioF ⁇ H4SiCl3.
• the hydrophobic nature of the sample is then quantitatively evaluated by measuring the contact angle of the initial water; this is 105 °.
• the abrasion resistance of the hydrophobic / oleophobic property is then evaluated by measuring the contact angle of the water after
• the second and third samples are processed in two stages.
• diethylchlorosilane is grafted in the gaseous route at 60 ° C. Then the Si-H of the diethylchlorosilane molecules grafted with divinyl-terminated polydimethylsiloxanes of average molar masses in number M n of 2500, respectively 12500, are reacted by hydrosilylation in the presence of Karsted catalysts.
• each of the two divinyl terminated polydimethylsiloxanes (M n 2,500 and M n 12,500) is grafted separately onto a sample of bare silica-soda-lime float glass, that is to say free of mesoporous coating.
• the grafting is carried out as indicated previously.
• the initial contact angle of the water is again measured and after
• the invention provides a substrate whose transparency and optical quality allow it to be used in glazing such as windshields for motor vehicles or aircraft. It is likely, in particular, to constitute the external surface, the excellent durability of its hydrophobic / oleophobic coating designating it particularly for this purpose, in particular when wipers, or other abrasive sources, are used.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Materials Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Composite Materials (AREA)
• Inorganic Chemistry (AREA)
• Combustion & Propulsion (AREA)
• Surface Treatment Of Glass (AREA)
• Laminated Bodies (AREA)

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Cited By (15)

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Citations (2)

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• 1998
  • 1998-12-21 FR FR9816115A patent/FR2787350B1/fr not_active Expired - Lifetime
• 1999
  • 1999-12-16 DE DE69941908T patent/DE69941908D1/de not_active Expired - Lifetime
  • 1999-12-16 WO PCT/FR1999/003167 patent/WO2000037374A1/fr not_active Ceased
  • 1999-12-16 AT AT99961094T patent/ATE454365T1/de active
  • 1999-12-16 EP EP99961094A patent/EP1144327B1/fr not_active Expired - Lifetime
  • 1999-12-16 PT PT99961094T patent/PT1144327E/pt unknown
  • 1999-12-16 JP JP2000589454A patent/JP5128733B2/ja not_active Expired - Fee Related
  • 1999-12-16 ES ES99961094T patent/ES2339309T3/es not_active Expired - Lifetime
• 2001
  • 2001-06-21 US US09/884,936 patent/US6627319B2/en not_active Expired - Lifetime

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