| abstract |
A reactive dye compound is presented comprising: (a) at least one chromophore entity; (b) at least one SO2C2H4 group that is attached to the chromophore entity, either directly through the sulfur atom of the SO2C2H4 group or through the L link group; characterized in that at least one SO2C2H4 group is substituted in its terminal carbon atom with at least one Y group, where Y is derived from a hydrated aldehyde, a hydrated ketone, a hydrated alpha hydroxy ketone or the hydrated form of formic acid and It is linked by means of one of its oxygen atoms with the terminal carbon atom of the SO2C2H4 group, thus forming a hemiacetal. The compounds herein have high depletion values (E). high fixation values (F), and high efficacy values (T) and show significant improvements in terms of reducing the dye used in the effluent, increasing the affinity of the dye for the substrate, increasing the covalent bond dye-substrate, increasing the ability to have substrates at room temperature, reducing the amount of dye that is removed during the post-staining "dewatering process" and thus simplifying the "post staining" dewatering process, traditionally associated with the staining of cotton with dyes that react with the fibers, as well as the reduction of staining of adjacent white fabrics. Additionally, the compounds prepared above provide more intense strains and require lower levels of salt for cotton substrates. |