Patent Number: 6,309,794

Title: Optical recording media comprising a resin film

Abstract: The present invention aims to provide a resin suitable for use as a protective layer or adhesive layer formed on the surface of a metal film. A liquid oligomer having a high specific gravity of 1.10 or more is contained in a photocurable resin involved in photopolymerization of a resin composition. Upon application on a metal film 12 and photopolymerization, bulky substituents owned by the high-specific gravity liquid oligomer prevent penetration of moisture to provide a protective film 13 with low water permeability. Said high-specific gravity liquid oligomer should desirably be contained in the photocurable resin within the range from 35% by weight to 78% by weight both inclusive.

Inventors: Hayashi; Kozaburo (Tochigi, JP), Kominami; Hiraku (Tochigi, JP), Tanaka; Mieko (Tochigi, JP), Konishi; Misao (Tochigi, JP)

Assignee: Sony Chemicals Corporation

International Classification: G11B 7/24 (20060101); G11B 7/25 (20060101); G11B 7/244 (20060101); G11B 7/258 (20060101); G11B 11/00 (20060101); G11B 11/105 (20060101); G11B 007/24 ()

Expiration Date: 10/30/2018