| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an adhesive composition having high adhesivity to hardly adhesive substrates such as COP, PPS, LCP and a magnesium alloy, and an optical component excellent in durability obtained by applying the composition and curing it. Ž<P>SOLUTION: This active energy ray-curable adhesive composition has following characteristics (a), (b), (c), (d) and (e): (a) the viscosity before curing measured at 23°C by the method stipulated in JIS K 5600-2-3 is ≤50 Pa s; (b) the volume shrinkage rate between before and after curing is ≤3 vol.%; (c) the linear expansion coefficient after curing is ≤1,000 ppm; (d) the Duro D hardness after curing measured by the method stipulated in JIS K 7215 is 10-70; (e) the shear strength after curing by using a cycloolefin polymer-adhered body by the method stipulated in JIS K 6850 is ≥0.5 MPa. The adhesive contains the active energy ray-curable adhesive composition. The recording and reproducing apparatus for an optical disk is manufactured by using the adhesive. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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