5-Aralkyl substituted 2h-benzotriazoles in stabilized compositions

Claim 1

A stabilized composition which comprises (a) an organic polymer substrate subject to light-induced deterioration, and (b) 0.1 to 5% by weight of the stabilized composition of the compound of formula I ##STR7## wherein R 1 and R 2 are independently hydrogen, halogen, alkyl of 1 to 18 carbon atoms or a group of formula II ##STR8## wherein E 1 and E 2 are independently hydrogen or alkyl of 1 to 4 carbon atoms and E 3 is hydrogen, halogen or alkyl of 1 to 4 carbon atoms, with the proviso that at least one of R 1 and R 2 must be a group of formula II; R 3 is hydrogen, hydroxyl, alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 4 carbon atoms, phenyl, phenyl substituted by one, two or three alkyl groups having 1 to 8 carbon atoms, cycloalkyl of 5 to 6 carbon atoms, carboalkoxy of 2 to 9 carbon atoms, chlorine, carboxyethyl or a group of formula II, R 4 is hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 12 carbon atoms, chlorine or hydroxyl, and R 5 is hydrogen, hydroxyl, alkyl of 1 to 12 carbon atoms, chlorine, cycloalkyl of 5 to 6 carbon atoms or a group of formula II, with the proviso that R 3 , R 4 and R 5 cannot each be hydrogen at the same time, and that only one of R 3 , R 4 and R 5 can be hydroxyl at the same time.