| abstract |
PCT No. PCT/EP95/03836 Sec. 371 Date Mar. 28, 1997 Sec. 102(e) Date Mar. 28, 1997 PCT Filed Sep. 28, 1995 PCT Pub. No. WO96/10598 PCT Pub. Date Apr. 11, 1996The invention relates to nitrogen-containing polymers containing structural units of formula (I), <IMAGE> (I) where the symbols and indices have the following meanings: Ar1, Ar2, Ar3 are, identically or differently, mono- and/or polynuclear and/or condensed aryl and/or heteroaryl groups which may or may not be linked via one or more bridges carbon atoms, which may or may not be substituted; X is a single bond, -O-, -S-, -SO-, -SO2, NR3, -CR4R5-, -CO-, -CR6=CR7, CR8R9-CR10R11 or SiR12R13; R1-R13 are, identically or differently, H, a hydrocarbon radical having from 1 to 22 carbon atoms or Ar4, where Ar4, identical with or different from Ar1, has the same meanings as Ar1; n=1, 2 or 3. |