Patent ID: 6747780
Filing Date: 2004-06-08
Classification: C09K,G02F,H01L

Abstract:
A method for synthesizing an electrochromic polymer suitable for use as a cathodic layer within a laminated electrochromic device; comprising the steps of:(a) providing a first quantity of 3,4-dimethoxythiophene and a second quantity of 2,2-dimethyl-1,3-propanediol; (b) dissolving the first and second quantities in a sufficient quantity of toluene, such that substantially all of the first and second quantities dissolve in the toluene to form a solution; and (c) refluxing the solution for at least eight hours, such that: (i) the solution boils; (ii) the toluene vaporizes, condenses and returns to the solution; and (iii) the first and second quantities react to form [3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine].