C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 9/02 (2006.01) B60J 1/00 (2006.01) E06B 7/00 (2006.01) G02B 1/06 (2006.01) G02B 3/00 (2006.01) G02B 5/23 (2006.01) G02B 25/00 (2006.01) G02C 7/10 (2006.01)
Patent
CA 2717649
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.
La présente invention concerne une composition photochromique, liquide à 20 °C, comprenant (a) au moins un colorant photochromique, et (b) un solvant ionique choisi parmi (b)(i) les liquides ioniques liquides à température ambiante (RTIL), (b)(ii) les mélanges, liquides à température ambiante, de liquides ioniques. (b)(iii) les mélanges, liquides à température ambiante, d'au moins un liquide ionique et d'au moins un solvant organique miscible avec le(s) liquide(s) ionique(s). L'invention concerne également l'utilisation d'une telle composition photochromique dans des dispositifs optiques, tels que des lentilles ophtalmiques.
Archambeau Samuel
Cano Jean-Paul
Galley Corinne
Malbosc Francois
Essilor International (compagnie Generale D'optique)
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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