| abstract |
Benzophenone derivatives of formula (I) in which X is O, S or NR 3 , and R 3 is H or linear or branched C 1 -C 10 alkyl; R 1 is H or methyl, R 2 is H, halogen, linear or branched C 1 -C 10 alkoxy, linear or branched C 1 -C 10 alkyl, linear or branched C 1 -C 10 alkylthio or a group NR 4 R 5 , wherein R 4 and R 5 are independently linear or branched C 1 -C 10 alkyl, can be used as copolymerizable photoinitiators and photocrosslinkers. |