USE OF SULFONATED 2-(2'-HYDROXYARYL)-s-TRIAZINES AS PHOTOSTABILISING AGENTS FOR WOOL AND OTHER PROTEIN FIBRES

摘要

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 -SO¿3X; R?3 is aryl, substituted aryl or O-alkyl; and X is hydrogen, NH¿4? or alkali metal, or formula (II), wherein R?1¿ and R¿4? are hydrogen, alkyl, hydroxyl, O-alkyl, OOC-alkyl or OOCNH-alkyl; R?2 and R5¿ are hydrogen, alkyl or -SO¿3X; R?3 is hydrogen or -SO¿3X; R?6 is aryl, substituted aryl, O-alkyl or O-aryl; and X is hydrogen, NH¿4? 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.