Patent ID: 7595011
Filing Date: 2009-09-29
Classification: C08K,C09K,G02F

Abstract:
1. A composition which is suitable as a medium in an electrochromic device, which composition comprises a) one or more solvents suitable as a medium in an electrochromic device selected from the group consisting of ketones, cyclic esters, cyclic carbonates and glycidyl ether carbonates, and one or more materials which are a functional element of an electrochromic device, b) an effective amount of one or more ultraviolet light absorbers selected from the group consisting of hydroxyphenylbenzotriazoles and tris-aryl-s-triazines, and c) an effective amount of one or more N—H or N-alkyl hindered amine light stabilizers of formula A′ wherein E is hydrogen or C m is 1 to 4, when m is 1, R when m is 2, R when m is 3, R when m is 4, R