Patent ID: 9331280
Filing Date: 2016-05-03
CPC Classification: B32B,C09K,G02F,H01L

Claim Text:
1. A transparent electrochromic formed by polymerization of a diamine and a cycloaliphatic dianhydride, wherein the diamine comprises a diamino triphenylamine having the formula Wherein R1 consists of hydrogen, halogen, C and R2 consists of hydrogen, halogen, C 1-6 alkyl group, C 1-6 alkoxy group; and the cycloaliphatic dianhydride comprises wherein the resulting polymer is sufficiently soluble in an organic solvent having a boiling point of 150° C. to 220° C. to form a film, and wherein the resulting polymer is configured to, when placed into a film, transfer from colorless to color upon application of a voltage.