Disclosed is the use of silane and siloxane bis(biphenyl)triazine derivatives of formula (1), wherein n is a number from 1 to 4 if n=1, X is *-L-Sil or a radical of formula (11&prime), L is a linker selected from a radical of formula (2) R1, R2, R3 independently from each other are C1-C22alkyl C6-C20aryl C1-C22alkoxy or O&mdashC6-C20aryl R4, R5, R6 and R7 independently from each other are hydrogen C1-C22alkyl C6-C20aryl C1-C22alkoxy or O&mdashC6-C20aryl b is a number from 0 to 30 c is a number from 0 to 6 and d is a number from 0 to 1 p is a number from 1 to 250 q is a number from 0 to 250 and Sil, Sil1 and Sil2 independently from each other are a silane-, oligosiloxane or polysiloxane moiety if n=2, X is a bivalent radical of formula (1a) or (1b) x is a number from 2 to 250 y is a number from 0 to 250 and z is a number from 1 to 50 if n=3, X is a trivalent radical containing a silane-, oligosiloxane or polysiloxane moiety If n=4, X is a tetravalent radical of formula (1c) and A is a radical of formula (111&prime) as UV absorbers.
