Reactive xylylene diphosphonic acid dyes

摘要

P-Xylylenediphosphonic acid groups connected through the aromatic ring to a variety of chromophores provide a class of novel dyes of the general formula <IMAGE> wherein "Dye" represents the chromophore. These dyes may be covalently bonded to fibers and other substrates containing hydroxyl, amino, or thiol groups to form phosphonic acid esters or amides by reaction in the presence of a carbodiimide such as cyanamide or dicyandiamide.