Abstract
The adsorption kinetics of the UV-absorber Tinuvin P, 2-(2-hydroxy-5 methyl-phenyl)-2H-benzotriazole on polyester (PET) fabrics have been studied. Polyester fabrics were dyed with CI Disperse Blue 85 and a new red monoazo disperse dye in different depths (0–5,1 and 2% o.w.f.) by application of the UV-absorber by different processes (pretreatment, simultaneous addition and af ter treatment ) and various UV-absorber/dye molar ratios (0.5–3.5). The application of the UV-absorber (0.1–2.5% o.w.f.) resulted in a slight decrease in dye uptake by the pretreatment and simultaneous addition processes, and in most cases in an improvement of light fastness (0–2 units of the Blue Standard scale) of the dyed fabrics. The light fastness improvement was generally higher for the aftertreatment process and for the blue dye.
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