Volume hologram optical recording medium, composition for forming volume hologram recording layer, volume hologram recording material, and volume hologram optical recording method

Abstract

Disclosed is a volume hologram optical recording medium having a recording layer with low moisture absorption. Specifically disclosed is a volume hologram optical recording medium having a multi-layer structure including a transparent substrate and a recording layer. The recording layer contains a resin matrix (A) and/or a resin matrix (B) and a photosensitive compound (C). The resin matrix (A) is obtained by reacting a polyisocyanate (A1) and a polyol (A2) having a —(C═O)O— group and/or a —O(C═O)O— group, while the resin matrix (B) is obtained by reacting an epoxy compound (B1) having two or more epoxy groups in one molecule and a curing agent (B2). In addition, the recording layer has a moisture absorption rate of 1.5 wt % or less.

Dependencies are inferred from the claim text.