OPTICAL DATA STORAGE MEDIUM FORMED OF UV-CURABLE RESIN AND PROCESS FOR THE PRODUCTION THEREOF

摘要

An erasable optical data storage medium and a process for preparation thereof. The medium comprises a substrate and a dual layer formed on the substrate, the dual layer having characteristic features that: (A) one layer of the dual layer is a first layer comprising a first resin which exhibits rubbery elasticity at 20.degree.C and a first dyestuff having absorption in a visible light or near infrared ray region; (B) the other layer of the dual layer is a second layer comprising a second resin which exhibits a glass state at 20.degree.C, exhibits a rubbery state at an elevated temperature and can be reversibly transformed between the glass state and the rubbery state and a second dyestuff having absorption in a visible light or near infrared ray region; and (C) one of the above first resin and the above second resin is a UV curable resin and the other of these two resins is a different UV curable resin or a thermosetting resin.