| 摘要 |
PROBLEM TO BE SOLVED: To improve infrared ray absorption, wear resistance, scuffing resistance and surface strength of an infrared ray absorption hard coat film by including an infrared ray absorber and a vehicle. SOLUTION: A bar code paint is obtained by compounding per 100 pts.mass of at least one vehicle selected from an organosilicon compound represented by the formula: R1xR1ySi(R3)4-x-y, its hydrolyzate and its hydrolytic condensation product, and an infrared ray absorber of 0.1-50 pts.mass, preferably 1-30 pts.mass comprising a squaric acid (derivative) represented by the formula, (in the formulas, Ra and Rb are each an alkyl, alkenyl, aryl, epoxy, glycidoxy, amino, mercapto, methacryloyloxy, or a hydrocarbon group having cyano; R1 and R2 are each an alkyl, alkenyl, aryl, halogen, epoxy, glycidoxy, amino, mercapto, methacryloyloxy, or a hydrocarbon group having cyano; R3 is a hydrolyzable group; and x and y are each 0 or 1). The bar code paint is applied onto a transparent base so that it has a thickness of 0.1 μm-1 mm, thereby obtaining the bar code film. |
