FIELD: production of polymers with high thermal resistance. SUBSTANCE: method involves polycondensation of salt prepared of diamine and tetracarboxylic acid or of its dicarboxyl-containing derivative, the process takes place at 100-180 C in the medium of aromatic carboxylic acid or mixture thereof. Diesterdiacid or diamidodiacid is used as said dicarboxylic-containing derivative. EFFECT: improved efficiency.
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