Keil & Weinkauf
Branched, high molecular weight, thermoplastic polyarylene ethers containing nitrile groups, and their preparation
 Branched, high molecular weight, thermoplastic polyarylene ethers which contain nitrile groups and are composed of repeating units of the formula I EQU --E.sub.1 --O--E.sub.2 --O-- where E.sub.1 is a radical derived from a dihalobenzene compound and E.sub.2 is a radical derived from a bisphenol, and contain from 0.01 to 5 mol %, based on the radical E.sub.1, of one or more radicals derived from polyhalo compounds of the formulae ##STR1## where X is fluorine or chlorine, and their preparation. 
BASF Aktiengesellschaft
C C C C
C08G C08G C08G C08G
inventional inventional inventional inventional
Gerd Peter Herbert
Blinne Neumann Bender