Patent ID: 7388038

Claim:
A curable composition comprising the following two components: (A1) a vinyl polymer which has a main chain produced by living radical polymerization techniqiue, and has at least one crosslinking silyl group of the general formula (1) on the average per molecule: —[Si(R 1) 2-b (Y) b O] m —Si(R 2 ) 3-a (Y) a (1) wherein R 1 and R 2 may be the same or different and each represents an alkyl group containing 1 to 20 carbon atoms, an aryl group containing 6 to 20 carbon atoms, an aralkyl group containing 7 to 20 carbon atoms, or a triorganosiloxy group of the formula (R′) 3 SiO—, where R′ represents a univalent hydrocarbon group containing 1 to 20 carbon atoms and the plurality of R′ groups may be the same or different, and when two or more R 1 or R 2 groups are present, the plurality of groups may be the same or different; Y represents a hydroxyl group or a hydrolyzable group and, when two or more Y groups are present, they may be the same or different; a represents an integer of 0, 1, 2 or 3; b represents an integer of 0, 1 or 2; m is an integer of 0 to 19; with the condition that the relation of a+mb≧1 is satisfied and (B) a photocurable substance.