Лако-красочные материалы — производство

Notable advances have been made in recent years in triphenodioxazine dyes. Tri- phendioxazine direct dyes have been known for many years; C. I. DirectBlue 106, 51300 [6527-70-4] (13) is a typical dye. Resurgence of interest in triphendioxazine dyes arose through the successful modification of the intrinsically strong and bright triphendioxazine chromogen to produce blue reactive dyes for cotton [2]. These blue reactive dyes combine the advantages of azo dyes and anthraquinone dyes. Thus they are bright, strong dyes with good fastness properties. Structure (14) is typical of these reactive dyes, where R represents a reactive group.

Like phthalocyanine dyes, triphenodioxazine dyes are large molecules, and therefore their use is restricted to coloring the more open-structured substrates such as paper and cotton.