| The effect that incorporating a UV stabilizer moiety into the backbone of state-of-the-art disperse dye structures, including Disperse Yellow 42, Disperse Yellow 86, and Disperse Red 167, has on the lightfastness of these compounds was investigated. The novel dyes designed and synthesized were applied to polyester fabric and exposed to artificial light for comparison with the prototypes. The results of this study showed that the nature of the photostabilizer and the site at which this group was incorporated influenced the light stability of the molecule. In general, those dyes containing a benzophenone-type stabilizer were more lightfast than dyes containing a benzotriazole or hindered amine moiety. It was found that the lightfastness properties of Disperse Yellow 42 and Disperse Yellow 86 were especially improved by this approach. |
