Polymers from 4,4′-thiodiphenol

Polyesters were made with aromatic diacid chlorides and 4,4,-thiodiphenol. Isophthaloyl chloride and/or terephthaloyl chloride were used as acid chlorides alone or together with 5-cyanoisophthaloyl chloride or 2.2]p-cyclophane-3,9-dicarboxylic acid chloride. The latter components were incorporated in order to make the polymers useful for crosslinking. A polyether could be obtained by polycondensation of 2,4-dichloro-benzonitrile and 4,4′-thiodiphenol. The polycondensations were run in nitrobenzene as solvent.