PROTECTIVE COATING COMPOSITION, ADHESIVE COMPOSITION, CURED ARTICLE, OPTICAL DISK, AND BONDING METHOD

摘要

PROBLEM TO BE SOLVED: To obtain an adhesive compsn. for optical disks excellent in curing properties at normal temp. and a cured article excellent in adhesion and durability by combining a specific protective coating compsn. for optical disks with a specific adhesive compsn. for optical disks. SOLUTION: A protective coating compsn. for optical disks is prepd. by mixing 70-99wt.% unsatd. compd., 0.1-29wt.% photopolymn. initiator, and 0.5-10wt.% cure accelerator for an org. peroxide. The coating compsn. is applied to a recording layer on an optical disk and is cured by the exposure to an energy ray to form a protective layer. An adhesive compsn. for optical disks is prepd. by mixing 80-99.99wt.% ethylenically unsatd. compd., 0.01-10wt.% org. peroxide, and 0-10wt.% photopolymn. initiator. The adhesive compsn. is applied to a protective layer of an optical disk. Then, the surface coated with the adhesive compsn. is stuck to the protected surface of another optical disk having a protective layer and it left standing at room temp. Thus, the adhesive compsn. is cured to bond two optical disks.