Active energy ray-curable coating composition and method for forming protective coating film

Abstract

A coating composition curable by active energy rays which composition can form an transparent inorganic cured film having an excellent appearance, a mar resistance, and film adhesion properties is provided. The coating composition contains a siloxane compound (A) obtainable by the hydrolysis and condensation of an alkyl silicate expressed by the following general formula (1) wherein R1, R2, R3, and R4 represent an alkyl group having 1 to 5 carbon atoms or an acyl group having 2 to 4 carbon atoms, respectively, and n indicates an integer from 3 to 20, and a cation polymerization initiator (B) having a sensitivity to the active energy rays. A method for forming a protective film by applying the coating composition on the surface of a plastic substrate and then irradiating the composition with active energy rays to form the protective film is also provided.

Dependencies are inferred from the claim text.