Patent ID: 8809414

Claim:
A photocurable composition comprising: (A) a modified polyorganosiloxane compound having a photopolymerizable functional group and an SiH group; (B) a compound having a carbon-carbon double bond; and (C) a photopolymerization initiator, wherein the component (A) is a hydrosilylation reaction product of the following compounds (α) to (γ): (α) an organic compound having, in a molecule thereof, one or more carbon-carbon double bonds that have reactivity with SiH groups; (β) an organosiloxane compound having at least two SiH groups in a molecule thereof; and (γ) a compound having, in a molecule thereof, a photopolymerizable functional group and a carbon-carbon double bond that has reactivity with SiH groups, and wherein the compound (β) is at least one species selected from the group consisting of organopolysiloxanes having at least two SiH groups in a molecule thereof and having a T or Q structure in the molecule and represented by the following formulas: (wherein R 16 represents a C 1-6 organic group and n represents a number of 0 to 50) and organosiloxanes represented by the following general formula (III): wherein R 4 and R 5 each represents a C 1-6 organic group, and may be the same or different, n represents a number of 2 to 10, m represents a number of 0 to 10, and “n+m” represents a number of 3 or more.