Abstract: The invention relates to a water based composition to be used for the preparation of anti-abrasion coatings on ophthalmic lenses. The composition comprises: the product of hydrolysis of an epoxyalkoxysilane SiXY3, wherein X represents a monovalent organic group linked to the silicon atom through a carbon atom and containing at least one epoxy function and Y represents an alkoxy group; cationic nanoparticles comprising silica, wherein a water sol of said cationic particles is stable at acidic pH; an inorganic non-hydrogen Lewis acid; a surfactant such that a water solution of 15 wt % of said surfactant exhibits a static surface tension below 25 mN/m at 20° C.; less than 0.5 wt % of a water miscible organic solvent less volatile than water. Moreover, the composition comprises no organic solvents other than said water miscible organic solvent less volatile than water and other than organic solvents that are a product of hydrolysis of the epoxyalkoxysilane.

Abstract: The invention relates to a mold (2) for manufacturing an ophthalmic lens or an ophthalmic lens blank called a puck (3), equipped with an insert (1), said mold comprising a first portion (2A) intended to mold the front face of the ophthalmic lens or puck, a second portion (2B) intended to mold the back face of the ophthalmic lens or puck and at least one third portion (2C) intended to mold a peripheral lateral face of the ophthalmic lens or puck. According to the invention, said mold (2) comprises at least one recess (2B1, 2B2, 2B3, 2B4) for positioning the insert (1), before and during the molding.

Abstract: The invention relates to a process for manufacturing an ophthalmic lens equipped with an insert (1), by means of a mold, comprising: —a step of molding a puck (3) comprising two faces (3A, 3B) and said insert (1) positioned between said faces; and —a step of machining at least one of said faces (3A, 3B) of said puck in order to form one of the front or back faces of said ophthalmic lens, the insert (1) being positioned relative to one portion of the mold before said molding step, According to the invention, an element associated with the insert or an imprint of this element left in the puck after the element has been removed comprises at least one of its portions providing a positional reference relative to said insert (1) in the machining step.

Abstract: The invention relates to a mould (2) for manufacturing an ophthalmic lens or an ophthalmic lens blank called a puck (3), equipped with an insert (1), said mould comprising a first portion (2A) intended to mould the front face of the ophthalmic lens or puck, a second portion (2B) intended to mould the back face of the ophthalmic lens or puck and at least one third portion (2C) intended to mould a peripheral lateral face of the ophthalmic lens or puck. According to the invention, said mould (2) comprises at least one recess (2B1, 2B2, 2B3, 2B4) for positioning the insert (1), before and during the moulding.

Abstract: The invention relates to a process for manufacturing an ophthalmic lens equipped with an insert (1), by means of a mold, comprising:—a step of molding a puck (3) comprising two faces (3A, 3B) and said insert (1) positioned between said faces; and—a step of machining at least one of said faces (3A, 3B) of said puck in order to form one of the front or back faces of said ophthalmic lens, the insert (1) being positioned relative to one portion of the mold before said molding step, According to the invention, an element associated with the insert or an imprint of this element left in the puck after the element has been removed comprises at least one of its portions providing a positional reference relative to said insert (1) in the machining step.

Abstract: Disclosed is an optical article comprising on at least one of its main surfaces an outer hydrophobic and/or oleophobic coating and in direct contact with the outer hydrophobic and/or oleophobic coating a dual-layer temporary coating, wherein the dual-layer temporary coating is removable and comprises: a first layer, in direct contact with the outer hydrophobic and/or oleophobic coating comprising halogenated olefin polymers or polyurethanes; and a water barrier second layer comprising a polymer or polymer mixture acting as a water barrier deposited on the first layer comprising at least one vinyl polymer, polyepoxide, polyepisulfide, polyester, polyether, polyester-ether, poly(meth)acrylate, polythio(meth)acrylate, styrene polymer, or cellulosic polymer.

Abstract: The invention relates to a method for treating an optical lens coated onto at least one of the main surfaces thereof with an outer hydrophobic and/or oleophobic coating, and for making it capable of undergoing an edging process, comprising a step of treating the peripheral area of said coated main surface which results in the removal of the hydrophobic and/or oleophobic coating and/or in the modification of said coating that lowers the hydrophobic character thereof, and a step of depositing a temporary polymeric coating onto said main surface of the lens so as to cover at least partially the hydrophobic and/or oleophobic coating and the peripheral area treated during the previous step, in order to provide an optical lens having onto at least one of the main surfaces thereof an outer hydrophobic and/or oleophobic coating and, in direct contact with said hydrophobic and/or oleophobic coating, a temporary polymeric coating adhering to the surface of the coated lens.

Abstract: A method for manufacturing an ophthalmic lens includes molding the lens (1) between a first mold portion (6A) and a second mold portion (6B) with the first entry surface (4A) formed by making in the lens a molded cavity by means of a stud (6C) secured to the second mold portion (6B), and that the light guide (4) is temporarily secured to the stud (6C) prior to molding. The second entry surface (4B) is formed by making in the lens a molded cavity by means of a mold insert (7) temporarily secured to the light guide (4) prior to molding, the first mold portion (6A) being placed above said insert (7).

Abstract: The present invention relates to a method for treating an optical lens coated on at least one of the main surfaces thereof with a hydrophobic and/or oleophobic external coating, to make it capable of undergoing an edging process, comprising a step of depositing onto at least one part of the hydrophobic and/or oleophobic external coating a temporary adhesive composite film, said adhesive composite film comprising a pre-formed film, one main surface of which is coated with a pressure-sensitive adhesive layer, said adhesive layer directly contacting the hydrophobic and/or oleophobic coating, the pre-formed film modulus of elasticity in tension E? being higher than or equal to 4200 MPa, and the rupture stress of the assembly composed of said adhesive film bonded to a polycarbonate specimen coated with a fluorinated silane layer, measured under tensile stress in accordance with the shear strength evaluation standard NF EN 1465, being higher than or equal to 0.05 MPa.

Abstract: A method of manufacturing an ophthalmic lens is provided where a first entry surface (4A) is formed by making in the lens a molded cavity by means of a stud (6C) secured to the second mold portion (6B), and that the light guide (4) is temporarily secured to said stud (6C) prior to molding. The second entry surface (4B) is formed by making in the lens a molded cavity by means of a mold part (7A) comprised of a peripheral cylindrical element (7), the first mold portion (6A) being placed above this peripheral cylindrical element (7) and the space between the first mold portion 6A and the second mold portion (6B) being closed by this peripheral cylindrical element (7).

Abstract: A method for manufacturing an ophthalmic lens includes molding the lens (1) between a first mold portion (6A) and a second mold portion (6B) with the the first entry surface (4A) formed by making in the lens a molded cavity by means of a stud (6C) secured to the second mold portion (6B), and that the light guide (4) is temporarily secured to the stud (6C) prior to molding. The second entry surface (4B) is formed by making in the lens a molded cavity by means of a mold insert (7) temporarily secured to the light guide (4) prior to molding, the first mold portion (6A) being placed above said insert (7).

Abstract: The present invention relates to an optical article comprising on one of the main surfaces thereof an external water- and/or oil-repellent coating, characterized in that a temporary coat of a dried polyurethane latex-based composition is directly deposited onto the external water- and/or oil-repellent coating.

Abstract: The present invention relates to a method for treating an optical lens coated on at least one of the main surfaces thereof with a hydrophobic and/or oleophobic external coating, to make it capable of undergoing an edging process, comprising a step of depositing onto at least one part of the hydrophobic and/or oleophobic external coating a temporary adhesive composite film, said adhesive composite film comprising a pre-formed film, one main surface of which is coated with a pressure-sensitive adhesive layer, said adhesive layer directly contacting the hydrophobic and/or oleophobic coating, the pre-formed film modulus of elasticity in tension E? being higher than or equal to 4200 MPa, and the rupture stress of the assembly composed of said adhesive film bonded to a polycarbonate specimen coated with a fluorinated silane layer, measured under tensile stress in accordance with the shear strength evaluation standard NF EN 1465, being higher than or equal to 0.05 MPa.

Abstract: The optical article of the invention comprises on at least one of its main surfaces an outer hydrophobic and/or oleophobic coating and in direct contact with the outer hydrophobic and/or oleophobic coating a dual-layer temporary coating, characterized in that the dual-layer temporary coating comprises a first layer, in direct contact with the outer hydrophobic and/or oleophobic coating selected from halogenated olefin polymers and polyurethanes, and a second layer, deposited on the first layer, of a polymer or polymer mixture acting as a water barrier. Applies to ophthalmic lens edging.

Abstract: The optical article of the invention is characterized in that it comprises on one of the main surfaces thereof an external hydrophobic and/or oleophobic coating, a dried temporary coating of a composition comprising, preferably consisting in, one or more aliphatic thermoplastic polyurethane(s) having a polyether or polyester backbone directly deposited onto the external hydrophobic and/or oleophobic coating. Application to ophthalmic lenses.

Abstract: The invention relates to a method for treating an optical lens coated onto at least one of the main surfaces thereof with an outer hydrophobic and/or oleophobic coating, and for making it capable of undergoing an edging process, comprising a step of treating the peripheral area of said coated main surface which results in the removal of the hydrophobic and/or oleophobic coating and/or in the modification of said coating that lowers the hydrophobic character thereof, and a step of depositing a temporary polymeric coating onto said main surface of the lens so as to cover at least partially the hydrophobic and/or oleophobic coating and the peripheral area treated during the previous step, in order to provide an optical lens having onto at least one of the main surfaces thereof an outer hydrophobic and/or oleophobic coating and, in direct contact with said hydrophobic and/or oleophobic coating, a temporary polymeric coating adhering to the surface of the coated lens.

Abstract: Disclosed is a cleaning solution comprising, based on the total weight of the solution: (a) more than 50% by weight of at least one lactone (component A); (b) and 1 to 10% by weight of at least one surfactant compound (component B) having a HLB ranging from 8 to 15 and selected from the group consisting of compounds of formula wherein: R1 denotes a hydrocarbon group comprising from 1 to 20 carbon atoms; n? is an integer from 1 to 5, X denotes a valence link, —O—, —OCH2, C?O or (CH2)k, k being an integer varying from 1 to 2; Y denotes (RO)jH wherein j is an integer ranging from 2 to 40, and R is a divalent hydrocarbon group, and compounds of formula wherein l is an integer from 6 to 13 and m is an integer from 3 to 15.

Abstract: The invention relates to a composition comprising one or more polymerizable monomers, comprising at least one masking agent selected amongst cyclic ethers and at least one perfume selected amongst naturally occurring musks and extracts thereof, synthetic musks, and mixtures thereof.

Abstract: The present invention relates to an optical article comprising on one of the main surfaces thereof an external water- and/or oil-repellent coating, characterized in that a temporary coat of a dried polyurethane latex-based composition is directly deposited onto the external water- and/or oil-repellent coating.

Abstract: The invention relates to a composition comprising one or more polymerizable monomers, comprising at least one masking agent selected amongst cyclic ethers and at least one perfume selected amongst naturally occurring musks and extracts thereof, synthetic musks, and mixtures thereof.