COATING COMPOSITION FOR HARD-COAT FORMATION ON POLYCARBONATE SUBSTRATE, POLYCARBONATE FILM WITH HARD COAT LAYER, AND POLYCARBONATE MOLDING WITH HARD COAT LAYER

摘要

A coating composition which gives on polycarbonate substrates a hard coat film excellent not only in surface hardness and marring resistance but in adhesion to the substrates. The coating composition comprises a material giving a hard coat and an organic solvent. The organic solvent comprises a solvent (S) which attacks the polycarbonate at 25 DEG C, in an amount of at least 70 wt.% based on the whole organic solvent. The solvent (S) comprises, based on the solvent (S), 10 to 50 wt.% high-boiling solvent having a boiling point of 100 DEG C or higher and 50 to 90 wt.% low-boiling solvent having a boiling point of 80 DEG C or lower. The high-boiling solvent is preferably toluene, while the low-boiling solvent is preferably ethyl acetate and/or methyl ethyl ketone. The material giving a hard coat is preferably an ultraviolet-curable acrylic one.