| 摘要 |
PURPOSE:To prevent flawing and staining from the outside and to decrease the pitting deterioration of a magneto-optical recording layer by using a UV curing type compsn. of a photocation polymn. type as a protective layer. CONSTITUTION:An epoxy resin compsn. of the photocation polymn. type which does not contain acrylic acid, etc., and does not generate org. acids in high- humidity atmosphere, i.e. the UV curing type epoxy resin compsn. contg. an epoxy resin, aluminum compd., org. silicon compd. having a peroxysilyl group, and a photosensitizer is used for the protective layer 5. The phenomenon that the transition metal of the magneto-optical recording layer 3 is ionized by the org. acids, etc., to dissolve all the components is, therefore, prevented. The flawing and staining from the outside are prevented in this way and the pitting deterioration of the magneto-optical recording layer is decreased. |
