Abstract: The invention concerns an item comprising a substrate having at least one main surface coated with a layer A in direct contact with a hydrophobic outer layer B, characterized in that said layer A has been obtained by depositing, under ion beam, activated species from at least one compound C, in gas form, containing, in the structure of same: at least one carbon atom, at least one hydrogen atom, at least one Si—X group, in which X is a hydroxy group or a hydrolysable group chosen from the H, halogen, alkoxy, aryloxy and acyloxy groups, —NR1R2 in which R1 and R2 separately designate a hydrogen atom, an alkyl group or an aryl group, and —N(R3)—Si in which R3 designates an alkyl group or an aryl group, said compound C being neither tetramethyldisiloxane nor tetraethoxysilane, nor vinylmethyldiethoxysilane, nor hexamethylcyclotrisilazane, said layer A not being formed from inorganic precursor compounds.

Abstract: A colloidal suspension of tungsten-doped SnO2 particles is provided. It also pertains to the method for preparing such colloidal suspension and to its uses, especially in the manufacture of an antistatic coating for an optical article, such as an ophthalmic lens.

Abstract: The present invention pertains to a method for producing a colloidal suspension of zirconia particles, comprising the following successive steps: a) subjecting a mixture of zirconium oxychloride and an alkali metal halide in an aqueous solvent to hydrothermal treatment at a temperature above 150° C., so as to obtain a suspension in the form of a two-phase mixture comprising a slurry and a supernatant, b) without first peptizing it, desalting said suspension so as to form a colloidal suspension of zirconia.

Abstract: A method for producing a colloidal alcoholic suspension of fluorine-doped SnO2 particles. It also pertains to the colloidal suspension thus obtained and to its uses, especially in the manufacture of an antistatic coating for an optical article, such as an ophthalmic lens.

Abstract: A coating composition includes a colloidal suspension of specific zirconia nano-particles, at least one epoxysilane and at least one catalyst. A method for preparing this composition, and its use for coating a transparent optical substrate, an optical article, such as an ophthalmic lens, including a transparent polymer substrate, especially an acrylic substrate, and a coating prepared from the composition, which is directly applied on the substrate, are also described.

Abstract: The invention concerns an item comprising a substrate having at least one main surface coated with a layer A in direct contact with a hydrophobic outer layer B, characterised in that said layer A has been obtained by depositing, under ion beam, activated species from at least one compound C, in gas form, containing, in the structure of same: at least one carbon atom, at least one hydrogen atom, at least one Si—X group, in which X is a hydroxy group or a hydrolysable group chosen from the H, halogen, alkoxy, aryloxy and acyloxy groups, —NR1R2 in which R1 and R2 separately designate a hydrogen atom, an alkyl group or an aryl group, and —N(R3)—Si in which R3 designates an alkyl group or an aryl group, said compound C being neither tetramethyldisiloxane nor tetraethoxysilane, nor vinylmethyldiethoxysilane, nor hexamethylcyclotrisilazane, said layer A not being formed from inorganic precursor compounds.

Abstract: A method for producing a colloidal alcoholic suspension of fluorine-doped SnO2 particles. It also pertains to the colloidal loidal suspension thus obtained and to its uses, especially in the manufacture of an antistatic coating for an optical article, such as an ophthalmic lens.

Abstract: The present invention pertains to a method for producing a colloidal suspension of zirconia particles, comprising the following successive steps: a) subjecting a mixture of zirconium oxychloride and an alkali metal halide in an aqueous solvent to hydrothermal treatment at a temperature above 150° C., so as to obtain a suspension in the form of a two-phase mixture comprising a slurry and a supernatant, b) without first peptizing it, desalting said suspension so as to form a colloidal suspension of zirconia.

Abstract: A coating composition includes a colloidal suspension of specific zirconia nano-particles, at least one epoxysilane and at least one catalyst. A method for preparing this composition, and its use for coating a transparent optical substrate, an optical article, such as an ophthalmic lens, including a transparent polymer substrate, especially an acrylic substrate, and a coating prepared from the composition, which is directly applied on the substrate, are also described.

Abstract: Material with hierarchical and organized porosity in the microporosity and mesoporosity domains, consisting of at least two elementary spherical particles, each one of said particles comprising a matrix based on silicon oxide, mesostructured, having a mesopore diameter ranging between 1.5 and 30 nm and exhibiting microporous and crystallized walls of thickness ranging between 1 and 60 nm, said elementary spherical particles having a maximum diameter of 200 microns. The preparation of said material is also described.

Abstract: Material with hierarchical porosity consisting of at least two elementary spherical particles, each one of said particles comprising a matrix based on silicon oxide, mesostructured, having a mesopore diameter ranging between 1.5 and 30 nm and exhibiting amorphous and microporous walls of thickness ranging between 1.5 and 50 nm, said elementary spherical particles having a maximum diameter of 200 microns. The matrix based on silicon oxide can contain aluminium. The preparation of said material is also described.

Abstract: Material with hierarchical and organized porosity in the microporosity and mesoporosity domains, consisting of at least two elementary spherical particles, each one of said particles comprising a matrix based on silicon oxide, mesostructured, having a mesopore diameter ranging between 1.5 and 30 nm and exhibiting microporous and crystallized walls of thickness ranging between 1 and 60 nm, said elementary spherical particles having a maximum diameter of 200 microns. The preparation of said material is also described.

Abstract: Material with hierarchical porosity consisting of at least two elementary spherical particles, each one of said particles comprising a matrix based on silicon oxide, mesostructured, having a mesopore diameter ranging between 1.5 and 30 nm and exhibiting amorphous and microporous walls of thickness ranging between 1.5 and 50 nm, said elementary spherical particles having a maximum diameter of 200 microns. The matrix based on silicon oxide can contain aluminium. The preparation of said material is also described.

Abstract: An organic/inorganic hybrid material (OIHM) that consists of elementary spherical particles is described, whereby each of said spherical particles consists of a mesostructured matrix that is based on silicon oxide and organic groups with reactive terminal groups that are linked covalently to the inorganic structure, whereby said mesostructured matrix has a pore size of between 1.5 and 30 nm and has amorphous walls with a thickness of between 1 and 20 nm. Said elementary spherical particles have a maximum diameter of 10 ?m. The matrix that is based on silicon oxide can contain aluminum, titanium, zirconium and cerium. Two methods for preparation of said material are also described.