CURING COMPOSITION, OPTICAL INFORMATION MEDIUM AND MANUFACTURING METHOD OF THOSE

摘要

PROBLEM TO BE SOLVED: To provide a curing composition suitable for formation of a light transmission layer having excellent protection performance to a semi-transparent recording film and a semi-transparent reflection film of a multilayer recording type optical disk.

SOLUTION: The curing composition for an optical information medium contains a urethane (meth)acrylate (A) synthesized from an alicyclic diisocyanate (a1) having ≤10 ppm total chlorine content, a polyhydric alcohol (a2) and a hydroxy alkyl (meth)acrylate (a3) and a (meth)acrylate (B) other than (A). The alicyclic diisocyanate (a1) is preferably formed by thermally decomposing an alicyclic diurethane which is formed by reacting alicyclic diamine, urea and alcohol.

COPYRIGHT: (C)2008,JPO&INPIT