Patent ID: 7923482

Claim:
An ultraviolet-curable resin composition which comprises a composite resin (A) which has a polysiloxane segment (a1) having a silanol group and/or a hydrolytic silyl group, as well as a polymerizable double bond and a polymer segment (a2) other than the polysiloxane segment (a1); a photo initiator (B); and a polyfunctional (meta) acrylate, wherein the polysiloxane segment (a1) is a polysiloxane segment having a structural unit expressed by the following general formula (S-2) and (S-3), (in the general formulae (S-2) and (S-3), R 3 , R 4 and R 5 each independently denotes an alkyl group of 1 to 6 carbon atoms, a cycloalkyl group or an aryl group of 3 to 8 carbon atoms and an aralkyl group of 7 to 12 of carbon atoms), and wherein the composite resin (A) is a composite resin in which the polysiloxane segment (a1) is bonded to the polymer segment (a2) in a structure expressed by the formula (S-5) (in the formula, the carbon atom is a carbon atom constituting the polymer segment (a2), and two silicon atoms are silicon atoms constituting the polysiloxane segment (a1)).