Various triazine polymers containing sulfonate pendants were synthesized by melt polycondensation of 2, 6-diphenoxy-4- (4-sulfophenylamino)-s-triazine (sodium and ammonium salts) and diamines. Since these polymers had high melt viocosity due to the ionic aggregation, the molecular weight did not much increase even by the solid state polycondensation. During the reaction, no coloration was observed with little decomposition even in the air.
When these reactions were carried out in th e presence of ε-caprolactam, copolyamides involving the triazine polymer unit were obtained. The copolymer containing 10 mol% of the trizine polymer unit showed water absorption nearly equal to cotton. The ion exchange of the copolyamides was easily performed with aqueous magnesium chloride.