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    Polycarbonates suitable for use in optical article
    2.
    发明授权
    Polycarbonates suitable for use in optical article 失效
    聚碳酸酯适用于光学制品

    公开(公告)号：US06248859B1

    公开(公告)日：2001-06-19

    申请号：US09347559

    申请日：1999-07-06

    申请人： Andrew James Caruso ,  Gary Charles Davis ,  Marc Brian Wisnudel ,  Ramesh Hariharan

    发明人： Andrew James Caruso ,  Gary Charles Davis ,  Marc Brian Wisnudel ,  Ramesh Hariharan

    IPC分类号： C08G6400

    CPC分类号： C08G64/06 ,  G11B7/2534

    摘要： The invention relates to polycarbonates comprising: (a) carbonate structural units corresponding to structure (I) where R1, R2, R3, and R4 are independently selected from the group consisting of C1-C6 alkyl, R5 is C1-C3 alkyl and n is 0, 1 or 2, and (b) carbonate structural units corresponding to structure (II):  where R6, R7, R10 and R11 are independently C1-C6 alkyl, R8 and R9 are independently H or C1-C5 alkyl, R12 is H or C1-C3 alkyl and n is 0, 1 or 2; where the polycarbonate has a glass transition temperature of from about 120° C. to about 185° C. and a water absorption of less than about 0.33%. This invention further relates to method of making these polycarbonates, optical articles made from these polycarbonates, and methods of making optical articles from these polycarbonates.

    摘要翻译： 本发明涉及聚碳酸酯，其包含：（a）对应于结构（I）的碳酸酯结构单元，其中R 1，R 2，R 3和R 4独立地选自C 1 -C 6烷基，R 5是C 1 -C 3烷基，n是 0,1或2，和（b）对应于结构（II）的碳酸酯结构单元：其中R 6，R 7，R 10和R 11独立地是C 1 -C 6烷基，R 8和R 9独立地是H或C 1 -C 5烷基，R 12是H或 C1-C3烷基，n为0,1或2;其中聚碳酸酯的玻璃化转变温度为约120℃至约185℃，吸水率小于约0.33％。本发明还涉及 制造这些聚碳酸酯的方法，由这些聚碳酸酯制成的光学制品，以及由这些聚碳酸酯制造光学制品的方法。

    Copolycarbonate compositions, and related articles and processes
    9.
    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

    申请人： Gary Charles Davis ,  Rein Mollerus Faber ,  Jan-Pleun Lens ,  Kathryn Lynn Longley ,  Marc Brian Wisnudel

    发明人： Gary Charles Davis ,  Rein Mollerus Faber ,  Jan-Pleun Lens ,  Kathryn Lynn Longley ,  Marc Brian Wisnudel

    IPC分类号： C08G6400

    CPC分类号： C08G64/06 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21

    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。