Optical recording medium
AssigneeSumitomo Bakelite Co., Ltd.
InventorsSetsuo Suzuki, Morio Tsuge, Syoichi Nakayama
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Abstract
An optical recording medium comprising a transparent substrate of a synthetic resin and an information recording layer provided thereon, on which medium information can be optically written, read and erased by means of a laser light, wherein said transparent substrate consists essentially of a cast-cured product of an epoxy resin composition comprising an alicyclic epoxy resin, or a mixture of a major amount of an alicyclic epoxy resin and a minor amount of an aromatic epoxy resin, an organic polybasic acid anhydride, a curing-accelerator and an anti-discoloring agent.
Claims14
An optical recording medium comprising a transparent substrate of a synthetic resin and an information recording layer provided thereon, on which medium information can be optically written, read and erased by means of a laser light, said transparent substrate consisting essentially of a cast-cured product of an epoxy resin composition comprising an alicyclic epoxy resin, an organic polybasic acid anhydride, a curing-accelerator and an anti-discoloring agent.
An optical recording medium comprising a transparent substrate of a synthetic resin and an information-recording layer provided thereon, on which medium information can be optically written, read and erased by means of a laser light, said transparent substrate consisting essentially of a cast-cured product of an epoxy resin composition comprising a mixture of a major amount of an alicyclic epoxy resin and a minor amount of an aromatic epoxy resin, an organic polybasic acid anhydride, a curing accelerator and an anti-discoloring agent.
Dependencies are inferred from the claim text.