Abstract: Hydrophobic treatment composition comprising one or more compounds, as a mixture, corresponding to the formula in which at least one R is a CaF2a+1 group, a being an integer, it being possible for another R to be an SiX3-bRC1b group, b being 0, 1 or 2 X being a hydrolysable group, such as alkoxy, hydroxyl or halo R1 being a hydrocarbon group, such as lower alkyl S is a hydrogen atom, an OH group, an alkyl group, in particular a lower alkyl group, such as CH3, or an OSiR2R3R4 group, R2, R3 and R4 being identical or different and consisting in particular of one of the abovementioned groups carried by an Si atom, such as (CH2)2—R, a hydrogen atom, an alkyl group or OSIR2R3R4, n is an integer?1, the total number of Si atoms not exceeding 20. Process for treatment by this composition. Hydrophobic glass substrate thus obtained and its application, in particular as glazing.

Abstract: The present invention relates to a method for manufacturing mesostructural coatings comprising electrically conductive structures formed of metal nanoparticles. Said method includes the steps that involve: a) depositing on a substrate, a first layer consisting of a silica material, mesostructured by a structuring agent, and a photocatalytic material: b) depositing on the first layer, a second layer of a mesostructural silica material, said second layer being free of photocatalytic material: c) consolidating the first and second layers at at temperature between 50° C. and 250° C.; and d) placing the consolidating coating in contact with a solution that contains and irradiatting coating with a radiation that enables the photocatalytic material to be activated. Said method is characterized in that it includes no heat treatment at a temperature greater than 250° C.

Abstract: The invention relates to a method of producing a substrate which is coated with a mesoporous layer and to the use thereof in ophthalmic optics. The inventive method comprises the following steps comprising: preparing a precursor sol containing (i) a precursor agent that is selected from compounds having formula M(X)4 (I), in which X is a hydrolysable group and M represents silicon or a tetravalent metal and mixtures thereof, (ii) at least one organic solvent, (iii) at least one pore-forming agent and (iv) water; depositing a film of the precursor sol on a main surface of the substrate; optionally consolidating the mesoporous structure of the deposited film; eliminating the pore-forming agent; and recovering the substrate coated with the mesoporous layer. The method is characterized in that: (i) the pore-forming agent is eliminated at a temperature of less than or equal to 150° C.

Abstract: The present invention relates to the use as an antisoiling coating of a porous coating comprising a polysiloxane matrix and a porous volume such that the potential filling ratio of the total volume of said coating by oleic acid is at least 25% by volume, having a porosity rate ranging from 25 to 70% by volume and having no photocatalytic properties. The antisoiling porous coating is self-cleaning, easy to clean and can be regenerated by simple washing. It is mainly intended for use in ophthalmic optics, and proves to be very effective against sebum. In the preferred embodiment of the invention, this coating has a mesoporous structure.

Abstract: The invention relates to a colloidal dispersion comprising rhabdophane-structured rare-earth phosphate particles (Ln) and a polyphosphate. Said dispersion is prepared by a method consisting in forming a medium comprising at least one type of rare-earth salt and a poly phosphate in such quantities that the P/Ln ratio is equal to or higher than 3, in heating the thus obtained medium and in removing residual salts, thereby obtaining said dispersion. Said invention also relates to a transparent luminescent material which is obtainable from said dispersion and based on the rare-earth phosphate particles and a polyphosphate and whose P/Ln ratio is higher than 1, to a luminescent system comprising said material and to an excitation source.

Abstract: Hydrophobic treatment composition comprising one or more compounds, as a mixture, corresponding to the formula in which at least one R is a CaF2a+1 group, a being an integer, it being possible for another R to be an SiX3-bRCb1 group, b being 0, 1 or 2 X being a hydrolysable group, such as alkoxy, hydroxyl or halo R1 being a hydrocarbon group, such as lower alkyl S is a hydrogen atom, an OH group, an alkyl group, in particular a lower alkyl group, such as CH3, or an OSiR2R3R4 group, R2, R3 and R4 being identical or different and consisting in particular of one of the abovementioned groups carried by an Si atom, such as (CH2)2—R, a hydrogen atom, an alkyl group or OSIR2R3R4, n is an integer?1, the total number of Si atoms not exceeding 20. Process for treatment by this composition. Hydrophobic glass substrate thus obtained and its application, in particular as glazing.

Abstract: The present invention relates to an article comprising a substrate having a main surface coated with a coating, part of which at least is mesoporous and has a refractive index profile with optical function, whose variation is imposed by the mesopore content and/or the filling ratio of the mesopores. The profile may be such that the refractive index varies depending on the distance to a given axis, or such that the refractive index variation is monotone, decreasing along any axis which is perpendicular to the surface of the substrate underlying the mesoporous part of said coating and oriented away from the substrate. The present invention also relates to methods for making said article, which differ depending on the technique from which the refractive index profile is created. The invention is applicable to ophthalmic optics.

Abstract: The invention relates to a transparent substrate based on glass or one or more polymers, or a ceramic or glass substrate, or a substrate made of architectural material of the type comprising a wall render, a concrete slab or block, architectural concrete, roof tile, material of cementitious composition, terracotta, slate, stone, metal surface or a fibrous substrate, based on glass of the mineral insulation wool type, or glass reinforcement yarns. This substrate is distinguished in that it is provided, on at least part of its surface, with a coating whose mesoporous structure exhibits photocatalytic properties and comprises at least partially crystallized titanium oxide. Process for manufacturing this substrate, its application in glazing, as architectural material or as mineral insulation wool is also described.

Abstract: The invention relates to a method of producing a substrate which is coated with a mesoporous layer and to the use thereof in ophthalmic optics. The inventive method comprises the following steps consisting in: preparing a precursor sol containing (i) a precursor agent that is selected from compounds having formula M(X)4 (I), in which X is a hydrolysable group and M represents silicon or a tetravalent metal and mixtures thereof, (ii) at least one organic solvent, (iii) at least one pore-forming agent and (iv) water; depositing a film of the precursor sol on a main surface of the substrate; optionally consolidating the mesoporous structure of the deposited film; eliminating the pore-forming agent; and recovering the substrate coated with the mesoporous layer. The method is characterized in that: (i) the pore-forming agent is eliminated at a temperature of less than or equal to 150° C.

Abstract: This substrate is coated with a composite film based on a mesoporous mineral layer containing nanoparticles formed in situ inside the layer. The composite film has a periodic lattice structure over a major portion of the thickness in which the nanoparticles are present, in which structure the nanoparticles are arranged in a periodic manner on the scale of domains of at least 4 periods in the thickness of the film. This structure can be obtained from a mesoporous mineral layer of periodic structure on the scale of domains of at least 4 periods of pores, forming a matrix on the substrate, by: depositing at least one precursor in the pores of the matrix layer; and growing particles derived from the precursor with the spatial distribution and the dimensions being controlled by the structure of the pores of the matrix. Applications to materials for electronics, nonlinear optics and magnetism.

Abstract: The invention relates to a colloidal dispersion comprising rhabdophane-structured rare-earth phosphate particles (Ln) and a polyphosphate. Said dispersion is prepared by a method consisting in forming a medium comprising at least one type of rare-earth salt and a poly phosphate in such quantities that the P/Ln ratio is equal to or higher than 3, in heating the thus obtained medium and in removing residual salts, thereby obtaining said dispersion. Said invention also relates to a transparent luminescent material which is obtainable from said dispersion and based on the rare-earth phosphate particles and a polyphosphate and whose P/Ln ratio is higher than 1, to a luminescent system comprising said material and to an excitation source.

Abstract: The invention relates to a transparent substrate based on glass or one or more polymers, or a ceramic or glass substrate, or a substrate made of architectural material of the type comprising a wall render, a concrete slab or block, architectural concrete, roof tile, material of cementitious composition, terracotta, slate, stone, metal surface or a fibrous substrate, based on glass of the mineral insulation wool type, or glass reinforcement yams. This substrate is distinguished in that it is provided, on at least part of its surface, with a coating whose mesoporous structure exhibits photocatalytic properties and comprises at least partially crystallized titanium oxide. Process for manufacturing this substrate, its application in glazing, as architectural material or as mineral insulation wool is also described.

Abstract: This substrate is coated with a composite film based on a mesoporous mineral layer containing nanoparticles formed in situ inside the layer. The composite film has a periodic lattice structure over a major portion of the thickness in which the nanoparticles are present, in which structure the nanoparticles are arranged in a periodic manner on the scale of domains of at least 4 periods in the thickness of the film.