Patent ID: 7935739

Claim:
A cationic curable composition, comprising components (A) to (D) in the following proportion: (A) 1 to 100 parts by weight of a phenol derivative having 3 or more aromatic rings per molecule, wherein the phenol derivative has a structure in which some or all hydrogen atoms of phenolic hydroxyl groups of the aromatic rings are substituted by polymerizable functional groups, and in which some or all of the positions para to the phenolic hydroxyl groups include substituents; (B) 1 to 500 parts by weight of a cationic polymerizable compound; (C) 0.05 to 20 parts by weight of a photo- and/or thermo-cationic initiator; and (D) 100 parts by weight of a reactive organosilicon compound represented by the formula (I): wherein n represents an integer of 1 or 2; and R 1 to R 4 each are an alkyl group having a carbon number of 1 to 4 and may be identical or different.