Adhesive for optical disk

Details Adhesive for optical disk Adhesive for optical disk

1996-10-16

1997-12-16

Lesmes, George F.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 644, 522 64, 522 18, 522 39, 522 33, 522167, B32B 306

Patent

active

056982852

ABSTRACT:
An adhesive for use in producing an optical disk comprising two transparent substrates bonded to each other with a photocurable adhesive at respective bonding surfaces thereof and having an information recording layer formed on one or both of the bonding surfaces is disclosed, which is a composition comprising ingredient (A) shown below and a photopolymerization initiator comprising ingredient (B) and/or ingredient (C) shown below:
(A) a radical-polymerizable vinyl compound,
(B) an acylphosphine oxide compound represented by the general formula ##STR1## and (C) an .alpha.-aminoacetophenone compound represented by the following formula. ##STR2## With this adhesive, optical disk substrates having an extremely low light transmittance can be easily bonded to each other in a short time period without impairing their appearance.

REFERENCES:
patent: 5128388 (1992-07-01), Komori et al.
patent: 5334456 (1994-08-01), Noren et al.
patent: 5554663 (1996-09-01), Desobry et al.

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