Abstract:
The present invention relates to the use as antisoiling coating of a porous coating having a polysiloxane matrix and a pore volume such that the potential fill factor of the total volume of said coating by oleic acid is at least 25% by volume, having a pore content ranging from 25 to 70% by volume and not having 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 present invention relates to the use as antisoiling coating of a porous coating having a polysiloxane matrix and a pore volume such that the potential fill factor of the total volume of said coating by oleic acid is at least 25% by volume, having a pore content ranging from 25 to 70% by volume and not having 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 concerns an article comprising a substrate having a main surface covered with a coating part of which at least is mesoporous and has a refractive index profile with optical function, the variation of which is imposed by the mesopore content and/or the filling factor 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 perpendicular to the surface of the substrate underlying the mesoporous part of said coating and oriented away from the substrate. The invention also concerns methods for making said articles, which differ depending on the technique from which the refractive index profile is created. The invention is applicable to ophthalmological optics.
Abstract:
La présente invention concerne l'utilisation en tant que revêtement antisalissure d'un revêtement poreux possédant une matrice polysiloxane et un volume poreux tel que le taux de remplissage potentiel du volume total dudit revêtement par l'acide oléique est d'au moins 25 % en volume, présentant un taux de porosité allant de 25 à 70 % en volume et ne présentant pas de propriétés photocatalytiques. Le revêtement poreux antisalissure est auto-nettoyant, facile à nettoyer et régénérable par un simple lavage. Il est principalement destiné à une utilisation en optique ophtalmique, et s'avère très efficace contre le sébum. Dans le mode de réalisation préféré de l'invention, ce revêtement possède une structure mésoporeuse.
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.; and (ii) the method comprises a step involving the introduction of at least one reactive agent bearing at least one hydrophobic group, before the deposition step and/or after said step.
Abstract:
La présente invention concerne un procédé de fabrication d'un support revêtu d'un film photochrome mésoporeux, comprenant :a) la préparation d'un sol précurseur d'un film mésoporeux comprenant un agent précurseur inorganique, au moins un solvant organique, de l'eau, au moins un agent porogène et un agent précurseur hydrophobe porteur d'au moins un groupe hydrophobe ;b) le dépôt d'un film du sol précurseur sur une surface principale d'un support ;c) l'élimination de l'agent porogène du film résultant de l'étape précédente à une température
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.; and (ii) the method comprises a step involving the introduction of at least one reactive agent bearing at least one hydrophobic group, before the deposition step and/or after said step.
Abstract:
Le procédé comprend : la préparation d'un sol précurseur comprenant un agent précurseur choisi parmi les composés de formule : M(X)4 (I), dans laquelle, X est un groupe hydrolysable, et M représente le silicium ou un métal tétravalent, et leurs mélanges ; au moins un solvant organique ; au moins un agent porogène ; et de l'eau ; le dépôt d'un film du sol précurseur sur une surface principale du substrat ; optionnellement la consolidation de la structure mésoporeuse du film déposé ; l'élimination de l'agent porogène ; et la récupération du substrat revêtu de la couche mésoporeuse ; le procédé étant caractérisé en ce que : (i) l'élimination de l'agent porogène s'effectue à une température
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.; and (ii) the method comprises a step involving the introduction of at least one reactive agent bearing at least one hydrophobic group, before the deposition step and/or after said step.