Salts of metal-free anionic substituted-2-hydroxy-1-phenylazonaphthalene dyes having cations containing sterically hindered amine groups

摘要

Salts of the formula Fn.A,wherein F is an anion of a metal-free anionic dye having m acid groups wherein m is 1 to 4, inclusive, A is a cation of an amine containing 1 to 6 sterically hindered amine groups, and n is 1 or 2, with the proviso that the salt contains 1 to nxm groups selected from ammonium and immonium groups, useful as pigments, particularly for the coloring of solvent-free and solvent-containing plastic materials, lacquers and printing inks.