Perdeuterated polyimide, their process of preparation and their use as materials which are transparent within the region from 2500 to 3500 cm-1

Abstract

The present invention relates to a deuterated polyimide, the backbone of which comprises an alternation between: at least one repeat unit corresponding to the following formula (I): in which: Y represents a single bond or a spacer group; and at least one repeat unit corresponding to the following formula (II): -A1-Z-  (II) in which: A1 represents a perdeuterated aromatic group comprising from 6 to 10 carbon atoms; Z represents a single bond or a group chosen from —O—C6D4-, —CO—C6D4- and —C6D4-. These polyimides are used in particular as materials which are transparent within the region from 2500 to 3500 cm−1, for example in laser devices.

Dependencies are inferred from the claim text.