CURABLE COMPOSITION

摘要

Photocurable composition curable by ultraviolet (UV) radiation comprising: A) at least one organosiloxane component A of the following formula (I) : whereby - Pa and Pb are each independently selected from a cationically polymerizable group, - x+y is an integer = 1, - Sp and Sp' are each independently selected from a cycloaliphatic hydrocarbon group and an aliphatic linear or branched hydrocarbon group, - R1 and R2 are each independently linear or branched aliphatic or cycloaliphatic, alkoxy, aromatic or hetero aromatic groups; B) at least one second organosiloxane component B of the following formula (II) : whereby - n is an integer ranging from 7 to 300, - x+y is an integer = 1, - Pa and Pb are each independently selected from a cationically polymerizable group, - Sp and Sp' are each independently selected from a cycloaliphatic hydrocarbon group and aliphatic linear or branched hydrocarbon group, - R1, R2, R3, R4 are each independently linear or branched aliphatic or cycloaliphatic, alkoxy, aromatic or hetero aromatic group; C) at least one epoxy and/or oxetane component C without siloxane groups; D) at least one cationic photoinitiator D.