Abstract:
The present invention relates to an electrochromic composition comprising at least one reducing compound and at least two oxidizing compounds, said at least two oxidizing compounds having similar oxydo-reduction potentials. More specifically, said at least two oxidizing compounds are selected from viologen derivatives. Said composition can be used as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.
Abstract:
The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials based on either single or two-core viologen systems and the use of these viologen systems as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.
Abstract:
The present invention relates to an electrochromic composition comprising at least one reducing compound, at least one oxidizing compound which is selected from specific viologen derivatives, and at least one dye. Said composition can be used as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.
Abstract:
A photochromic composition that is liquid at 20 °C and includes (a) at least one photochromic dye and (b) an ionic solvent selected from (b)(i) room-temperature ionic liquids (RTIL), (b)(ii) ionic liquid mixtures that are liquid at room temperature, and (b)(iii) room-temperature liquid mixtures of at least one ionic liquid and at least one organic solvent that is miscible therewith. The use of said photochromic composition in optical devices such as ophthalmic lenses is also described.
Abstract:
composto de fórmula (i) e seu método de preparação, composição eletrocrômica e dispositivo eletrocrômico. a presente invenção refere-se a um grupo de novos materiais eletrocrômicos. mais especificamente, ela se refere a materiais eletrocrômicos que se baseiam em sistemas viologênicos de um ou dois núcleos, e à utilização destes sistemas viologênicos como meio de transmissão variável para a fabricação de um artigo ótico, tal como uma lente oftálmica.
Abstract:
L'invention concerne un dispositif ophtalmique (1) comportant une cellule électrochrome (3) comprenant au moins deux couches transparentes (4, 5) ayant des faces internes (4a, 5a) incurvées et délimitant entre elles une cavité (6) fermée remplie par une composition électrochrome (7), la cavité (6) étant délimitée en périphérie par un joint de scellement (11) formé à partir d'un matériau adhésif (20) le joint de scellement (11) étant adapté pour maintenir les deux couches transparentes (4, 5) assemblées l'une avec l'autre.