The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 1997
Filed:
Oct. 16, 1996
Kazuhiro Kojima, Tokyo, JP;
Three Bond Co., Ltd., Tokyo, JP;
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.