| abstract |
A method for protecting proteinaceous fibres, either dyed or in their natural form, against photodegradation and thermal degradation. The method comprises treating the fibres with a sulfonated s-triazine derivative of formula (I), wherein R1 is hydrogen, alkyl, hydroxyl, O-alkyl, OOC-alkyl or OOCNH-alkyl; R2 is hydrogen, alkyl or -SO3X; R3 is aryl, substituted aryl or O-alkyl; and X is hydrogen, NH4 or alkali metal, or formula (II), wherein R1 and R4 are hydrogen, alkyl, hydroxyl, O-alkyl, OOC-alkyl or OOCNH-alkyl; R2 and R5 are hydrogen, alkyl or -SO3X; R3 is hydrogen or -SO3X; R6 is aryl, substituted aryl, O-alkyl or O-aryl; and X is hydrogen, NH4 or alkali metal; under acidic conditions. The method is particularly suitable for treating dyed and undyed wool, silk, mohair and cashmere fibres, including blends thereof. |