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    Optical recording medium and process for producing the same
    2.
    发明公开
    Optical recording medium and process for producing the same 失效
    Optisches Aufzeichnungsmedium und Verfahren zu dessen Herstellung。

    公开(公告)号：EP0144705A2

    公开(公告)日：1985-06-19

    申请号：EP84113028.9

    申请日：1984-10-29

    申请人： SUMITOMO BAKELITE COMPANY LIMITED

    发明人： Tsuge, Morio ,  Suzuki, Setsuo ,  Nakayama, Syoichi ,  Sakamoto, Yushi ,  Morishita, Koji

    IPC分类号： G11B7/24 ,  C08G59/42

    CPC分类号： C08G59/24 ,  C08G59/226 ,  C09D4/00 ,  G11B7/252 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2548 ,  G11B7/2578 ,  G11B23/0092 ,  G11B2007/24316 ,  G11B2007/24324 ,  G11B2007/24328 ,  C08F220/00

    摘要： In an optical recording medium (optical disk recording medium) on which information can be optically written, read and erased by use of a laser light and which comprises a transparent substrate of a synthetic resin and an information-recording layer provided on the surface of the substrate, said synthetic resin consists of an epoxy resin composition comprising an alicyclic epoxy resin or a mixture of an alicyclic epoxy resin and an aromatic epoxy resin; an organic polybasic acid anhydride; a curing accelerator; and an anti-discoloring (anti-oxidizing) agent, the above substrate is a cured product of a cast article of the epoxy resin composition and has a Si0 2 or SiO layer or a hard coat layer of a synthetic resin which may have a Si0 2 or SiO layer on its surface, whereby the substrate has thermal resistance and abrasion or scratch resistance, and on said layer there is provided an information-recording layer made of a low melting point metal such as Te, Se, Bi or the like or a complex material of said metal and an organic material or a rare earth metal and transition metal series magnetic alloy such as Td-Gd-Fe or the like. Said transparent substrate can easily be obtained by forming a thin film of MgF 2 , CaF 2 or SiC on the inner surface of a casting mold by an ion-plating method, a spattering method or the like in order to facilitate the release of the molded article of the epoxy resin composition from the casting mold, and casting the epoxy resin composition into the mold. The Si 2 0 or SiO layer or the hard coat of synthetic resin is applied on the thus obtained substrate and the information-recording layer is then applied thereto in a conventional manner. The hard coat of synthetic resin can easily be formed by first applying the hard coat layer on the inner surface of the casting mold, then casting the epoxy resin composition into the casting mold and curing the same to transfer the hard coat onto the cured molded article of the epoxy resin composition.

    摘要翻译： 在光学记录介质（光盘记录介质）中，可以通过使用激光光学写入，读取和擦除信息，并且包括合成树脂的透明基板和设置在该表面上的信息记录层 所述合成树脂由包含脂环族环氧树脂或脂环族环氧树脂和芳族环氧树脂的混合物的环氧树脂组合物组成; 有机多元酸酐; 固化促进剂; 和抗变色（抗氧化）剂，上述基材是环氧树脂组合物的铸造制品的固化产物，并且具有SiO 2或SiO层或合成树脂的硬涂层，其可以具有SiO 2或 SiO层，由此基板具有耐热性和耐擦伤性，并且在所述层上设置有由Te，Se，Bi等低熔点金属制成的信息记录层或复合物 所述金属的材料和有机材料或稀土金属和过渡金属系列磁性合金如Td-Gd-Fe等。 通过离子镀法，溅射法等在铸模的内表面上形成MgF 2，CaF 2或SiC的薄膜，可以容易地得到所述透明基板，以便于模塑制品的脱模 将环氧树脂组合物从铸模中浇铸，并将环氧树脂组合物浇注到模具中。 将Si 2 O或SiO层或合成树脂的硬质涂层涂布在如此获得的基板上，然后以常规方式将信息记录层施加到其上。 通过首先在铸模的内表面上涂覆硬涂层，然后将环氧树脂组合物浇注到铸模中并使其固化，将硬涂层转移到固化的模制品上，可以容易地形成硬质合成树脂 的环氧树脂组合物。

    Optical recording medium and process for producing the same
    3.
    发明公开
    Optical recording medium and process for producing the same 失效
    光学记录介质及其制造方法

    公开(公告)号：EP0144705A3

    公开(公告)日：1988-01-07

    申请号：EP84113028

    申请日：1984-10-29

    申请人： SUMITOMO BAKELITE COMPANY LIMITED

    发明人： Tsuge, Morio ,  Suzuki, Setsuo ,  Nakayama, Syoichi ,  Sakamoto, Yushi ,  Morishita, Koji

    IPC分类号： G11B07/24 ,  C08G59/42

    CPC分类号： C08G59/24 ,  C08G59/226 ,  C09D4/00 ,  G11B7/252 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2548 ,  G11B7/2578 ,  G11B23/0092 ,  G11B2007/24316 ,  G11B2007/24324 ,  G11B2007/24328 ,  C08F220/00

    摘要： In an optical recording medium (optical disk recording medium) on which information can be optically written, read and erased by use of a laser light and which comprises a transparent substrate of a synthetic resin and an information-recording layer provided on the surface of the substrate, said synthetic resin consists of an epoxy resin composition comprising an alicyclic epoxy resin or a mixture of an alicyclic epoxy resin and an aromatic epoxy resin; an organic polybasic acid anhydride; a curing accelerator; and an anti-discoloring (anti-oxidizing) agent, the above substrate is a cured product of a cast article of the epoxy resin composition and has a Si0 2 or SiO layer or a hard coat layer of a synthetic resin which may have a Si0 2 or SiO layer on its surface, whereby the substrate has thermal resistance and abrasion or scratch resistance, and on said layer there is provided an information-recording layer made of a low melting point metal such as Te, Se, Bi or the like or a complex material of said metal and an organic material or a rare earth metal and transition metal series magnetic alloy such as Td-Gd-Fe or the like. Said transparent substrate can easily be obtained by forming a thin film of MgF 2 , CaF 2 or SiC on the inner surface of a casting mold by an ion-plating method, a spattering method or the like in order to facilitate the release of the molded article of the epoxy resin composition from the casting mold, and casting the epoxy resin composition into the mold. The Si 2 0 or SiO layer or the hard coat of synthetic resin is applied on the thus obtained substrate and the information-recording layer is then applied thereto in a conventional manner. The hard coat of synthetic resin can easily be formed by first applying the hard coat layer on the inner surface of the casting mold, then casting the epoxy resin composition into the casting mold and curing the same to transfer the hard coat onto the cured molded article of the epoxy resin composition.