Acrylamide-assisted Photografting of Bisacrylamide Dyes onto Cotton

A new way to improve the light-fastness of azo reactive dyes through the introduction of benzene sulfonamide derivatives into the triazine ring

“…Generally, there are two ways to improve the light-fastness of azo dyes: rst, the use of chromophores, such as anthraquinone and metal azo complexes, with high light-fastness, [13][14][15] and second, the incorporation of UV absorbers into the dye molecules or the treatment of textiles with UV absorbers before or aer dyeing. [16][17][18][19][20][21][22] UV absorbers are usually introduced into a dye molecule by linkage with cyanuric chloride, 17 and the latter also acts as a reactive group in a reactive dye.…”