Patent ID: 6582884
Filing Date: 2003-06-24
Classification: G11B,Y10S

Abstract:
An optical disc, comprising a substrate, a metallized layer and a coating, the coating being formed from a radiation-curable composition comprising from about 30 to about 70 weight percent of a first component selected from the group consisting of alkanediol diacrylates, alkanediol dimethacrylates, alkene glycol diacrylates, alkene glycol dimethacrylates, and mixtures thereof, from about 20 to about 70 weight percent of an acrylate- or methacrylate-containing alkoxylated bisphenol A compound as a second component, a photoinitiator and from about 0.01 to about 1 weight percent of an adhesion promoter for promoting adhesion of the coating to the disc, the adhesion promoter comprising acrylated sulfonic acid, methacrylated sulfonic acid, acrylated sulfonic acid anhydride, methacrylated sulfonic acid anhydride, acrylated carboxylic acid methacrylated carboxylic acid, acrylated carboxylic acid anhydride, methacrylated carboxylic acid anhydride, acrylated phosphoric acid, methacrylated phosphoric acid, or mixtures thereof.