N-alkylated epoxide-amine addition polymers as well as epoxide-amine addition polymers containing carboxylate groups are used for an ion exchange by various anionic dyes such as diamine green, crocein or cationic dyes, respectively like rodamine and malachite green. The polymer-dye salts 1 and 2 are soluble in DMF, DMF/2-methoxy ethanol and other solvents and can be cast into transparent coloured films from these solutions. The glass transition temperatures were found between 90 and 165-degrees-C (1) and between 85 and 112-degrees-C (2), respectively. The thermal decomposition of polymers 1 and 2 takes place at 300 - 370-degrees-C, Furthermore, non-linear optical properties (third harmonic generation) of the polymer-dye salts 1 and 2 were expected and calculated to be 10(-12) - 10(-13) esu.