Poly(oxy-p-phenylenecarbonyl-p-phenylene)(8CI); 4,4'-Difluorobenzophenone-4,4'-dihydroxybenzophenone copolymer, SRU; 4,4'-Dihydroxybenzophenone-4,4'-difluorobenzophenonecopolymer, SRU; 4-Chloro-4'-hydroxybenzophenone homopolymer, SRU;4-Fluoro-4'-(trimethylsiloxy)benzophenone homopolymer, sru;4-Fluoro-4'-hydroxybenzophenone homopolymer, SRU; 4-Fluorophenyl 4-hydroxyphenylketone potassium salt polymer, SRU; 4-Phenoxybenzoic acid homopolymer, sru;4'-Fluoro-4-(trimethylsiloxy)benzophenone homopolymer, SRU; Bis(4-chlorophenyl)ketone-bis(4-hydroxyphenyl) ketone dipotassium salt polymer, SRU; Diphenylether-phosgene copolymer, SRU; PEK; PEK 220; PEK 22P; PEK-KT 5;Poly(oxy-1,4-phenylenecarbonyl-1,4-phenyleneoxy-1,4-phenylenecarbonyl-1,4-phenylene);Stilan; Victrex 220G; Victrex 220P; Victrex PEK; Victrex PEK 220; Victrex PEK220G; Victrex PEK 220P; Victrex PEK 22P; Victrex PEK-KT 5; p-phenoxybenzoylchloride homopolymer, SRU