| abstract |
A photocurable composition is provided that is curable by ultraviolet (UV), comprising: A) at least one organosiloxane component A of formula (I): In the formula, Pa and Pb are independently selected from cationic polymerizable groups, x + y is an integer ≥ 1, Sp and Sp 'are independently selected from cycloaliphatic or aliphatic linear or branched hydrocarbon groups, R 1 and R 2 are independently linear or branched aliphatic or cycloaliphatic, alkoxy, aromatic or heteroaromatic groups; B) at least one second organosiloxane component B of formula II: In the formula, n is an integer ranging from 7 to 300, x + y is an integer ≥ 1, Pa and Pb are independently selected from cationic polymerizable groups, Sp and Sp 'are independently selected from cycloaliphatic or aliphatic linear or branched hydrocarbon groups, R 1 , R 2 , R 3 and R 4 are independently linear or branched aliphatic or cycloaliphatic, alkoxy, aromatic or heteroaromatic groups; C) Epoxy and / or oxetane component C without at least one siloxane group: D) at least one cationic initiator D. |