Essilor International (compagnie Generale D'optique)

Shanghai University

Essilor International

Stephanie Pega

Yves Leclaire

Shuai Yuan

Liyi Shi

Jian Zhao

Zhuyi Wang

Yin Zhao

Karin Scherer

Sébastien Chiarotto

Bruce Faure

Xavier Panchout

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&#x2014;X group, in which X is a hydroxy group or a hydrolysable group chosen from the H, halogen, alkoxy, aryloxy and acyloxy groups, &#x2014;NRRin which Rand Rseparately designate a hydrogen atom, an alkyl group or an aryl group, and &#x2014;N(R)&#x2014;Si in which Rdesignates 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.

Item coated with a silicon/organic layer improving the performances of an outer coating

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&#xb0; 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.

Method for producing zirconia colloids

A method for producing a colloidal alcoholic suspension of fluorine-doped SnOparticles. 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.

Fluorine-doped stannic oxide colloids and method for preparing same

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.

Coating composition for an optical article, comprising a colloidal suspension of zirconia particles

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Charenton-le-Pont, France

Stephanie Pega