RADIATION-CURABLE COMPOSITION AND THE RESULTANT CURED PRODUCT, AND LAMINATED FORM OF THE CURED PRODUCT

摘要

PROBLEM TO BE SOLVED: To provide a radiation-curable composition capable of giving high surface hardness, transparency, heat resistance and moisture-resistant deformability, to provide a cured product thereof, and to provide a laminated form having the cured product's layer and suitably usable for optical recording media, etc. SOLUTION: The radiation-curable composition is such that the cured product obtained by radiation irradiation at an intensity of 0.1-3 J/cm2has the physical properties (a) to (c) mentioned below. The cured product and the laminated form having the cured product's layer are also provided respectively. (a) The surface hardness of the laminated form with a cured product's layer of 100±5μm thickness on a polyethylene terephthalate film of 100μm thickness is 2B or greater, (b) the light transmittance of the above laminated form at 550 nm wavelength is 85% or greater, and (c) the warpage on the circumference of the laminated form is less than 1.0 mm after leaving it to stand for 100 h at 80°C and 85% RH, wherein the laminated form is such that a cured product's layer of 100±5μm thickness is formed on a polycarbonate disc of 130 mm diameter and 1.2±0.2 mm thickness. COPYRIGHT: (C)2006,JPO&NCIPI