摘要 |
Salts of the formula FnxA, 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 4 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.
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