| 摘要 |
PURPOSE:To improve reliability of sealing by incorporating a specific compd. into an adhesive agent to concentrically adhere a pair of disk substrates having an org. dye recording layer on the inside of at least one substrate to form a sealing construction via inside and outside circumferential spacers or without interposing said spacers therebetween. CONSTITUTION:The compds. expressed by the formula I (L1 is the group expressed by the formula IV; L2 denotes the group expressed by the formula V; m is 0, 1; n is 2-4, R1 is methyl or ethyl; k is 1-4) and the formula II or III (R2 is H, methyl; l is 3-15, l' is 4-6) are incorporated into the adhesive agent 7 used to concentrically adhere a pair of the disk substrates 1, 1 having the org. dye recording layer 3 on the inside of at least one substrate 1 to form the sealing structure via the inside and outside circumferential spacers 4, 5 or without interposing the spacers therebetween. The sufficient adhesive strength is obtd. by using such sealing adhesive agent 7, by which the deformation of the substrate 1, 1 is decreased and an excellent preservable property is obtd. The time for curing at the time of the sticking is reduced as well. |
