Copolycarbonate compositions, and related articles and processes
    1.
    发明授权
    Copolycarbonate compositions, and related articles and processes 失效
    共聚碳酸酯组合物,以及相关的制品和方法

    公开(公告)号:US06706847B2

    公开(公告)日:2004-03-16

    申请号:US10104629

    申请日:2002-03-22

    IPC分类号: C08G6400

    摘要: A thermoplastic composition is described, based on a copolycarbonate which includes at least two structural units. Structure I is usually a conventional carbonate based on bisphenol A, while structure II is a bisphenol carbonate which includes branched or linear groups extending from a bridging carbon atom or carbon group which connects two aromatic rings. The compositions exhibit very good melt flow, along with enhanced shear-thinning behavior. These characteristics are important for optical disc applications. Thus, related articles are described, along with processes for preparing such articles.

    摘要翻译: 基于包含至少两个结构单元的共聚碳酸酯描述热塑性组合物。 结构I通常是基于双酚A的常规碳酸酯,而结构II是双酚碳酸酯,其包括从连接两个芳环的桥连碳原子或碳基延伸的支链或直链基团。 组合物显示非常好的熔体流动,以及增强的剪切稀化行为。 这些特性对于光盘应用很重要。 因此,描述了相关的文章以及制备这些物品的过程。

    Limited play data storage media and method for limiting access to data thereon
    5.
    发明授权
    Limited play data storage media and method for limiting access to data thereon 失效
    有限播放数据存储介质和用于限制对其上的数据的访问的方法

    公开(公告)号:US06866909B2

    公开(公告)日:2005-03-15

    申请号:US10233854

    申请日:2002-09-04

    IPC分类号: G11B7/258 B32B3/02

    摘要: A limited play optical storage medium for data is provided in the present invention. The limited play optical storage medium for data comprises a first substrate; a reflective layer; a data layer disposed between said substrate and said reflective layer; a reactive layer comprising at least one carrier; and at least one reactive material; and an optically transparent second substrate with an oxygen permeability in a range between about 0.01 Barrers and about 1.35 Barrers at 25° C. wherein the second substrate is between the reactive layer and a laser incident surface.

    摘要翻译: 本发明提供了一种用于数据的有限播放光存储介质。 用于数据的有限播放光学存储介质包括第一衬底; 反射层; 设置在所述基板和所述反射层之间的数据层; 包含至少一个载体的反应层; 和至少一种反应性材料; 以及在25℃下氧透过率在约0.01巴和约1.35巴之间的范围内的光学透明的第二基底,其中第二基底在反应层和激光入射表面之间。