Patent ID: 6514431
Filing Date: 2003-02-04
Classification: G02F,H01B

Abstract:
An electrochromic device comprising:(a) a pair of electrically conductive substrates facing each other and having on their inner surfaces electrode layers; and (b) an ion conductive layer disposed between the substrates, wherein the ion conductive layer is formed from a solid ion conductive material having an ion conductivity of 1Ã—10âˆ’7 or greater at 25Â° C., obtained by solidifying a mixture comprising (i) a solvent, (ii) a supporting electrolyte, (iii) a polymerizable monomer selected from the group consisting of a polyurethane monomer and an acryloyl- or methacrylate-modified polyalkyleneoxide, and (iv) an ultraviolet absorber, by polymerizing the polymerizable monomer, wherein the ultraviolet absorber is present in amount such that a transmissivity of electromagnetic rays having a wavelength of 300 to 360 nm and transmitting through a 0.2 mm thick layer of the ion conductive material is maintained at 0.1% or less.