UV-RAY SETTING RESIN AND A METHOD FOR MANUFACTURING A MAGNETO-OPTICAL DISK BY THE USE OF THE UV-RAY SETTING RESIN

摘要

A high quality magneto-optical disk which has the protective coating being excellent in the lubricity, the property of sliding and a long-term reliability includes a UV-ray resin composition comprising photo polymerizable prepolymer, photo polymerization initiator and organic compound having a side chain of fluoroalkyl group or unsaturated aliphatic alkyl group in the end of each molecule. The UV-ray setting resin comprising photo polymerization prepolymer at 30-80 parts by weight; photo polymerization initiator at 10-40 parts by weight; and organic polysiloxane at 0.1-10 parts by weight per 100 parts by weight of (meth-)acrylic ester is applied to approximately 10 mu m on the reflection layer 14 by the spincoat method and irradiating the UV-ray (illuminance: 600 mW/cm2, quantity of light: 800 mJ/cm2) at room temperature, thus forming the protective coating.