Abstract: A transparent electrochromic system includes a cellular structure, two power supply electrodes together supported on a single wall, and at least one additional electrode. The additional electrode can be used as a reference electrode or as a polarization electrode. The additional electrode can also form a condenser with a fourth electrode that is added to the system, in order to control a migration of certain electroactive substances responsible for coloring and decoloring the system. The operation of the system can thus be improved.

Abstract: A method for producing an article which is made of a transparent material and devoid of visible surfacing lines, comprising: obtaining a substrate which is made of a transparent material having a refractive index ns, at least one main face of which has been ground and polished in such a way that the Ra value thereof ranges from 0.001 to 0.1 ?m, but has visible surface defects in the form of thin individual scratches; depositing, a liquid polymerisable composition of a masking coating, the contact angle of which with said substrate main face being equal to or less than 30° and which forms upon polymerization a masking coating having a refractive index nc such that 0.01<|ns?nc|?0.15 and a thickness less than 10 micrometers, directly onto the ground and polished main face of the substrate, polymerizing the masking coating composition; and recovering the transparent article.

Abstract: The invention relates to polarized and abrasion-resistant article comprising: a) a polarized layer applied to a substrate, said polarized layer including an oriented liquid crystal polymer layer (LCP) including at least one dichroic dye, said liquid crystal layer being coated on a photo-orientation layer, and b) an abrasion-resistant coating applied to the polarized layer on said substrate. The invention also relates to a process for manufacturing said articles, and to the use of the above-mentioned article for the manufacturing of optic glasses or lenses.

Abstract: The invention relates to a transparent electroactive system that includes two electrodes (2, 3) juxtaposed on the same side of a closed space (12) containing electroactive substances. The two electrodes are separated by a distance of less than 250 ?m, and a barrier (1) extending towards the inside of the closed space is placed between the electrodes. The separation between the electrodes is thus not visible, and a mutual neutralization between the electroactive substances is prevented. Advantageously, the electroactive substances are contained in cells (5) separated from each other within the closed space. The barrier (1) can thus be distinct from separation walls (4) between the cells, or can be assimilated with some intercellular walls.

Abstract: The invention relates to a method for the non-electrolytic deposition of a compound, preferably an electrochromic compound, comprising the following successive steps: (a) an electroconductive layer is deposited on a non-conductive solid substrate; (b) a reducing agent or an oxidizing agent (=redox agent) is deposited on an area of said electroconductive layer, said area covering only a portion of the surface of said electroconductive layer; and (c) a solution of a precursor of the compound to be deposited is brought into contact both with the redox agent and with at least a portion of the area of said electroconductive layer not covered by the redox agent, said precursor being chosen from those having an oxidation-reduction potential higher or lower than the redox agent and forming, after an oxidation-reduction reaction, a compound insoluble in the solution of the precursor of the compound to be deposited.

Abstract: The invention relates to a photo-crosslinkable composition that can be obtained by a method including the following steps: (a) the hydrolysis and condensation reaction of a [(epoxycycloalkyl)alkyl]thalkoxysilane in solution in an organo-aqueous medium containing water in an initial water/monomer molar ratio of between 3 and 15, with at least one water-soluble solvent, at a pH of between 1.6 and 4.0, by heating the solution to a temperature of between 50 and 70° C. for a duration of between 180 and 350 minutes in order to obtain a solution of an organo-mineral hybrid prepolymer, in which the totality or quasi-totality of the alkoxysilane groups has been hydrolysed, and which comprises in average at least 4 (epoxycycloalkyl)alkyl groups; (b) cooling the polyepoxide prepolymer composition thus obtained down to a temperature of between 15 and 25° C.

Abstract: A method for preparing a colloidal solution of non-aggregated zirconia particles, comprising the following steps: a) providing a zirconium hydroxide sol, b) adding to said sol an inorganic acid according to an [inorganic acid]/[Zr] molar ratio of <0.5, c) performing the hydrothermal treatment of said sol, and d) recovering the colloidal solution of zirconia particles.

Abstract: A method for producing an article which is made of a transparent material and devoid of visible surface lines consists in producing a substrate which is made of a transparent material having a refractive index ns, whose at least main face is machined and polished in such a way that the Ra value thereof ranges from 0.001 to 0.1 ?m, but has visible surface defects in the form of thin individual scratches, in deposing, a liquid polymerisable composition of a masking coating, whose contact angle with said substrate main face is equal or less than 30° and which is formed by polymerising a masking coating having a refractive index nc such as 0.01<|ns?nc|=0.15 and a thickness less than 10 micrometers, directly on the machined and polished main face of the substrate, in polymerising the masking coating composition and in removing the transparent article.

Abstract: The invention relates to an article having a nanotextured surface with superhydrophobic properties, comprising an array of vertical tabs, preferably regular, wherein the pillar array fulfils the following conditions: the surface fraction of the pillars Øs is such that 3%?Øs?13%, preferably 5%?Øs?12%, preferably 5%?Øs?13%, even better 5.5%?Øs?13%, even better 6%?Øs?13%, and better still 8%?Øs?13%; the pitch p of the array is such that 100 nm?p?250 nm; the height h of the pillars is such that 100 nm?h?400 nm, preferably 250?h?400 nm, even better 300?h?400 nm; and the lateral surface of the pillars is inclined at most by an angle of ±20°, preferably ±10° or even better ±5°, in relation to the vertical axis of the pillars.

Abstract: The present invention relates to an optical article comprising a substrate, and, from the substrate upward: an organic antistatic coating comprising at least one conductive polymer, an adhesive and/or impact-resistant primer coating deposited onto said antistatic coating, and an abrasion-resistant and/or scratch-resistant coating deposited onto said adhesive and/or impact-resistant primer coating. The optical article has very short static charge dissipation times and its antistatic properties are stable over time.

Abstract: The invention relates to a method for producing a polarising ophthalmic lens adapted to the eye/head behaviour of the wearer thereof and to said lens. The inventive ophthalmic lens comprises several areas associated to differently oriented polarising filters. The size and position of at least certain areas are determined according to the lens wearer's eye/head behaviour.

Abstract: A transparent and polarizing vision element (2) divided into several areas. At least two of said areas are associated with a luminous polarization filter. The light flowing through the element is allocated differently for two the areas according to a direction of polarization of the light. At least one polarization filter is oriented vertically, and at least one polarization filter is oriented horizontally in relation to the usual position of the element.

Abstract: An apparatus for dip coating lenses comprises a tank for containing a coating liquid, a coating chamber for receiving one or more ophthalmic lenses. The tank is in fluid communication with the coating chamber for permitting the flow of coating liquid between the tank and the coating chamber. The apparatus has a first position where the coating chamber is located above the tank and second position where the tank is located above the coating chamber.

Abstract: The invention relates to a method for producing a polarising ophthalmic lens adapted to the eye/head behaviour of the wearer thereof and to said lens. The inventive ophthalmic lens comprises several areas associated to differently oriented polarising filters. The size and position of at least certain areas are determined according to the lens wearer's eye/head behaviour.

Abstract: The invention relates to polarized and abrasion-resistant article comprising: a) a polarized layer applied to a substrate, said polarized layer including an oriented liquid crystal polymer layer (LCP) including at least one dichroic dye, said liquid crystal layer being coated on a photo-orientation layer, and b) an abrasion-resistant coating applied to the polarized layer on said substrate. The invention also relates to a process for manufacturing said articles, and to the use of the above-mentioned article for the manufacturing of optic glasses or lenses.

Abstract: A transparent and polarizing vision element (2) divided into several areas. At least two of said areas are associated with a luminous polarization filter. The light flowing through the element is allocated differently for two the areas according to a direction of notarization of the light. At least one polarization filter is oriented vertically, and at least one polarization filter is oriented horizontally in relation to the usual position of the element.

Abstract: An apparatus for dip coating lenses comprises a tank for containing a coating liquid, a coating chamber for receiving one or more ophthalmic lenses. The tank is in fluid communication with the coating chamber for permitting the flow of coating liquid between the tank and the coating chamber. The apparatus has a first position where the coating chamber is located above the tank and second position where the tank is located above the coating chamber.

Abstract: An apparatus for dip coating lenses comprises a tank for containing a coating liquid, a coating chamber for receiving one or more ophthalmic lenses. The tank is in fluid communication with the coating chamber for permitting the flow of coating liquid between the tank and the coating chamber. The apparatus has a first position where the coating chamber is located above the tank and second position where the tank is located above the coating chamber.

Abstract: An apparatus for dip coating lenses comprises a tank for containing a coating liquid, a coating chamber for receiving one or more ophthalmic lenses. The tank is in fluid communication with the coating chamber for permitting the flow of coating liquid between the tank and the coating chamber. The apparatus has a first position where the coating chamber is located above the tank and second position where the tank is located above the coating chamber.

Abstract: The invention concerns leather finish compositions containing at least an aqueous dispersion of film-forming polymer at room temperature without cosolvent, or plasticizing agent and optionally a cross-linking agent. Said dispersions free of organic solvent provide non-sticky and abrasion resistant coatings with good water resistance. Said dispersions consist of structured polymer particles having one or more soft phases (Tg<20° C.) and one or more hard phases (Tg>60° C.).