There is described the use of indoline derivatives of formula
##STR1##
wherein
R.sub.1 is hydrogen; C.sub.1 -C.sub.5 alkyl; C.sub.1 -C.sub.18 alkoxy; or
halogen;
R.sub.2 is C.sub.1 -C.sub.8 alkyl; C.sub.5 -C.sub.7 cycloalkyl; C.sub.6
-C.sub.10 aryl;
R.sub.3 is C.sub.1 -C.sub.18 alkyl or a radical of formula
##STR2##
R.sub.4 is hydrogen; or a radical of formula
##STR3##
R.sub.5 is
##STR4##
C.sub.1 -C.sub.18 alkoxy; or a radical of formula
##STR5##
R.sub.6 and R.sub.7 are each independently of the other hydrogen; or
C.sub.1 -C.sub.5 alkyl;
R.sub.8 is hydrogen; C.sub.1 -C.sub.5 alkyl; C.sub.5 -C.sub.7 cycloalkyl;
phenyl; phenyl-C.sub.1 -C.sub.3 alkyl;
R.sub.9 is C.sub.1 -C.sub.18 alkyl;
X is halogen; a radical of formula
##STR6##
##STR7##
n is 0; or 1,
as light-protective agents.
Er beschreven het gebruik wordt van indolinederivaten van formule ## STR1 ## waarin R.sub.1 waterstof is; C.sub.1 - alkyl C.sub.5; C.sub.1 - alkoxy C.sub.18; of halogeen; R.sub.2 is C.sub.1 - alkyl C.sub.8; C.sub.5 - cycloalkyl C.sub.7; C.sub.6 - aryl C.sub.10; R.sub.3 is C.sub.1 - alkyl C.sub.18 of een basis van formule ## STR2 ## R.sub.4 zijn waterstof; of een basis van formule ## STR3 ## R.sub.5 is ## STR4 ## C.sub.1 - alkoxy C.sub.18; of een basis van formule ## STR5 ## R.sub.6 en R.sub.7 is elk onafhankelijk van de andere waterstof; of C.sub.1 - alkyl C.sub.5; R.sub.8 is waterstof; C.sub.1 - alkyl C.sub.5; C.sub.5 - cycloalkyl C.sub.7; phenyl; phenyl-c.sub.1 - alkyl C.sub.3; R.sub.9 is C.sub.1 - alkyl C.sub.18; X is halogeen; een basis van formule ## STR6 ## ## STR7 ## n is 0; of 1, als licht-beschermende agenten.
