PREPARATION OF PHOSPHORUS-CONTAINING POLYMERS .15. PREPARATION OF PHOSPHORUS-CONTAINING POLYAMIDE-IMIDES FROM N,N'-BIS(4-CARBOXYPHTHALIMIDO)-3,3'-DIPHENYLALKYLPHOSPHINE OXIDE AND AROMATIC DIACETAMIDES

Phosphorus-containing polyamide-imides were prepared from N,N′-bis(4-carboxyphthalimido)-3,3′-diphenylalkylphosphine oxide and aromatic diacetamido derivatives by acidolysis; the reaction conditions are discussed. The resulting polymers were fairly soluble in DMA, DMF and conc. H2SO4; the reduced viscosities of polymers in DMA or cone. H2SO4 (0.2 g/dl) at 30° were 0.19-0.32. The phosphorus-containing polymers have good thermal stability, and are self-extinguished immediately after the flame is removed. Most of the i.r. absorption bands of polymers vanished on heating at above 600°. © 1979.