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:
Nov. 23, 1999
Filed:
Jun. 30, 1998
Shigeo Hozumi, Toyonaka, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A layer for protection coating and adhesion of DVD is formed by a photo-curing resin composition which comprises a photo-curing component which is cured by polymerization reaction of a unsaturated group, a photo-polymerization initiator and a phenol-based primary antioxidant, wherein this photo-curing component comprises a bi-functional urethane acrylate, an epoxy acrylate containing a bisphenol A skeleton, and a N-vinyl lactam compound, said polymerization initiator comprising a mono or di-benzoylphosphine oxide compound in an amount of 0.1% by weight or more to less than 5.0% by weight based on the total amount of said photo-curing components, and the viscosity of this resin composition at 25.degree. C. being in the range from 350 to 700 mPa.multidot.s.