| US 7,501,477 B2 | ||
| Perdeuterated polyimides, their process of preparation and their use as materials which are transparent within the region from 2500 to 3500 cm-1 | ||
| Elsa Anselmi, Garches (France); Jacques Raby, Grenoble (France); Alexia Balland-Longeau, Tours (France); and Marc Calonne, Drache (France) | ||
| Assigned to Commissariat A l'Energie Atomique, Paris (France) | ||
| Filed on Apr. 05, 2007, as Appl. No. 11/732,961. | ||
| Application 11/732961 is a division of application No. 10/527630, granted, now 7,211,632, previously published as PCT/FR2004/050145, filed on Apr. 06, 2004. | ||
| Claims priority of application No. 03 50090 (FR), filed on Apr. 08, 2003. | ||
| Prior Publication US 2007/0185282 A1, Aug. 09, 2007 | ||
| Int. Cl. C08G 73/12 (2006.01); C07D 209/48 (2006.01) | ||
| U.S. Cl. 525—420.5 [548/437; 548/473] | 9 Claims |
| 1. A deuterated polyimide, the backbone of which comprises an alternation between:
at least one repeat unit corresponding to the following formula (I):
 Y represents —C6D4-; and
at least one repeat unit corresponding to the following formula (II):
 A1 represents a perdeuterated aromatic group comprising from 6 to 10 carbon atoms; and
Z represents a single bond or a group chosen from —O—C6D4-, —CO—C6D4-, —C6D4-.
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