Synonyms: 2,6-Dichlorobenzonitrile-resorcinolcopolymer SRU; 2,6-Difluorbenzonitrile-resorcinol copolymer, sru; 2,6-Difluorobenzonitrile-resorcinolcopolymer sru; ID 300; PEN-ID 300;Poly[oxy-1,3-phenyleneoxy(2-cyano-1,3-phenylene)];Resorcinol-2,6-difluorobenzonitrile copolymer, sru