Abstract: Disclosed is an optical lens including at least one continuous scattering area having a characteristic dimension d greater than or equal to 2 mm. Any sub-area of characteristic dimension dsub included in the at least one continuous scattering area, with dsub greater than or equal to 0.05 mm, verifies: |% Iscat_area?% Iscat_subarea|<0.2*% Iscat_area, where % Iscat_area is the average intensity ratio of light scattered by the continuous scattering area, and % Iscat_subarea is the average intensity ratio of light scattered by the sub-area.

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 present invention relates to a method for making an optical article with anti-reflection properties, comprising the steps of: a) forming on at least one main surface of a support, by applying a sol comprising at least one colloidal mineral oxide with a refractive index higher than or equal to 1.80 having an initial porosity; b) optionally, forming on the first lower layer by applying a sol comprising at least one colloidal mineral oxide with a refractive index lower than 1.65 a second lower layer having an initial porosity at least equal to the initial porosity of said first layer; c) applying onto the one or more lower layer(s) an upper layer composition of an optically transparent polymer material with a refractive index lower than or equal to 1.

Abstract: Abrasion resistant coating compositions based on silane hydrolyeates and aluminium compounds and corresponding abrasion and shock resistant coated articles The invention relates to a hardenable composition for an abrasion resistant coating comprising the following constituents: A—an epoxytrialkoxysilane hydrolysate, B—a hydrolysate of a silane having formula (I) where T1 and T2 each react to give a OH group on hydrolysis and Z1 and Z2 are unreactive organic groups, C—collcidal silica, D—a specific aluminium catalyst, E—optionally, an organic solvent with a boiling point between 70° C. and 140° C., and to corresponding coated articles, which can have nor-reflective treatments.

Abstract: Abrasion resistant coating compositions based on silane hydrolysates and aluminium compounds and corresponding abrasion and shock resistant coated articles

Abstract: A heat-settable composition for a coating which is hydrophobic, oleophobic and resistant to abrasion, wherein the coating contains a hydrolyzate obtained from a solution of: one or more epoxidized alkoxysilane having alkoxy groups which are directly linked to the silicon atom; a hydrolyzable, non-epoxidized silane; colloidal silica; a catalyst which promotes cleavage of an epoxy bond; and at least one fluorinated hydrolyzable alkylsilane; and the use of the heat-settable composition in the preparation of a coated substrate of organic glass or mineral glass material, coated with a coating obtained from the heat-settable composition, with the substrate preferably being a pane (comprised of glass or a polymeric material) or an ophthalmic lens.