Patent ID: 8052900

Claim:
A reactive UV absorber comprising; in admixture, (I-a) a benzophenone derivative of formula (I) wherein A 10 is hydroxyl and (I-b) a benzophenone derivative of formula (I) wherein A 10 is a group of formula (b), wherein A 1 is any one of groups represented by A 2 to A 10 , A 2 to A 9 are hydrogen, hydroxyl, C 1 -C 5 alkyl, C 1 -C 5 alkoxy, or a group of formula (a): —O—(CH 2 ) m+2 —SiR 11 n (OR 12 ) 3−n (a) wherein R 11 and R 12 each are C 1 -C 5 alkyl, m is an integer of 1 to 5, and n is an integer of 0 to 2, provided that at least one of A 1 to A 9 is a group of formula (a), and A 10 is hydroxyl in formula (I-a) or a group of formula (b) in formula (I-b): —OSiR 11 n (OR 12 ) 3−n (b) wherein R 11 , R 12 and n are as defined above.