Solid complexes of anionic organic dyes and quaternary ammonium compounds and methods of coloring utilizing such complexes

摘要

This invention relates to solid complexes of anionic organic dyes with quaternary ammonium compounds which have average molecular weights of below about 900 which are substantially free from unwanted salts. Of particular interest as quaternary ammonium compounds are those which comprise alkoxylated moieties. Such complexes are formed through ionic bonds formed between the two compounds. The complexes are then removed of substantially all resultant unwanted salt formed from the cations of the dye and the counter-ions of the quat so as to obtain a solid dyeing agent which easily disperses within different media and which possess extremely good non-migration and coloring characteristics. This invention also concerns methods of making the aforementioned salt-free solid anionic dye/quat complexes as well as methods of utilizing such complexes for dyeing thermoplastic, thermoset, and wax compositions.