SYNTHESIS OF NEW POLYESTERS CONTAINING PHOSPHORUS-HETEROCYCLES AND HALOGEN

Two series of polyesters containing phenoxaphosphine rings and several halogens were synthesized by low-temperature solution polycondensatio n in the presence of triethylamine. One series, containing halogens on ly in the bisphenol moiety, was obtained from -dichloroformyl-10-pheny lphenoxaphosphine-10-oxide and chlorinated bisphenol. In the second se ries, halogens belonged both to bisphenol and diacid dichlorides. For the last series, formyl-10-(4-bromophenyl)phenoxaphosphine-10-oxide wa s prepared as a new monomer. All resulting polyesters were characteriz ed by elemental analysis, reduced viscosity, IR and H-1 NMR spectrosco py, and thermogravimetric analysis. These polymers began to lose weigh t at about 400 degrees C in air being seen as self-extinguishing ones.