| abstract |
A process for the production of specified hydrazinium group-containing basic dyes. Also claims the dyes. Also claims a dyeing process in which the basic dye as claimed is used to dye or to print synthetic polymers containing more than 80% acrylonitrile including copolymers composed of 80-95% acrylonitrile and 20.5% vinyl acetate, methyl acrylate or methyl methacrylate, to dye in the mass, oils, lacquers, plastics, cellulose acetate and polyacrylonitrile, when the dyes possess good solubility in organic solvents, and to pigment cellulose acetate and polyacrylonitrile fibres when the dyes are made sparingly soluble by conversion into lakes with inorganic complex acids, higher fatty acids or acid dyes as anions. |