NEW PROCESSABLE POLYAROMATIC ETHER-KETO-SULFONES AS COLORLESS, CLEAR FILM-FORMING MATERIALS

In the reported experiments, new processable polyaromatic ether-keto-sulfones were prepared from 4,4 prime -diphenoxydiphenl sulfone, terephthaloyl chloride, isophthaloyl chloride, and bis-p-carboxyphenylacetylene dichloride (IV) in a Friedel-Crafts-type polymerization. The white polymers obtained form colorless, transparent, strong films and can be cast into a glass-fiber laminate. One polymer was prepared which incorporated biphenylene-2,6-dicarboxylic acid dichloride as crosslinking sites; this heat-cured polymer was completely insoluble in sulfuric acid.