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    PROCESS FOR PRODUCING POLYCARBONATE AND OPTICAL-DISK SUBSTRATE
    2.
    发明申请
    PROCESS FOR PRODUCING POLYCARBONATE AND OPTICAL-DISK SUBSTRATE 审中-公开
    生产聚碳酸酯和光盘基材的方法

    公开(公告)号：WO99036458A1

    公开(公告)日：1999-07-22

    申请号：PCT/JP1999/000037

    申请日：1999-01-08

    IPC: C08G64/14 ,  C08G64/30 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2536 ,  G11B7/24

    CPC classification number: C08G64/307 ,  C08G64/14 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2536

    Abstract: A process for producing a polycarbonate which comprises reacting a dihydroxy compound with a carbonic diester by transesterification, in which a specific branched compound such as 4-(1,1,3,3-tetramethylbutyl)phenol is added as a chain terminator; and an optical-disk substrate obtained by molding a polycarbonate obtained by the process. By the process, a polycarbonate having an excellent balance between flowability and impact resistance is produced without using phosgene, which is toxic, as a starting material. The optical-disk substrate is reduced in birefringence and has excellent suitability for transfer.

    Abstract translation: 一种制备聚碳酸酯的方法，其包括使二羟基化合物与碳酸二酯通过酯交换反应，其中加入特定的支化化合物如4-（1,1,3,3-四甲基丁基）苯酚作为链终止剂; 以及通过模制通过该方法得到的聚碳酸酯而获得的光盘基板。 通过该方法，不使用有毒的光气作为原料，可以制造流动性和耐冲击性之间的平衡优异的聚碳酸酯。 光盘基板的双折射率降低，转印性能优异。

    AROMATIC POLYCARBONATE, PROCESS FOR PRODUCING THE SAME, AND MOLDED ARTICLE
    3.
    发明申请
    AROMATIC POLYCARBONATE, PROCESS FOR PRODUCING THE SAME, AND MOLDED ARTICLE 审中-公开
    芳香族聚碳酸酯，其制造方法和成型品

    公开(公告)号：WO01040352A1

    公开(公告)日：2001-06-07

    申请号：PCT/JP2000/008415

    申请日：2000-11-29

    IPC: C08G63/06 ,  C08G64/14 ,  C08G64/30 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2535 ,  G11B7/2536 ,  C08G64/04 ,  C08G64/20 ,  G11B7/24

    CPC classification number: G11B7/2534 ,  C08G63/06 ,  C08G64/14 ,  C08G64/307 ,  G11B7/2533 ,  G11B7/2535 ,  G11B7/2536

    Abstract: An aromatic polycarbonate having high durability and excellent in color tone, transparency, and mechanical strength, especially one having high durability and stability in long-term use under high-temperature high-humidity conditions; a process for producing the polycarbonate; and a use thereof. The aromatic polycarbonate has a sodium content of 100 ppb or lower and nickel, lead, chromium, manganese, and iron contents of 70 ppb or lower each. The process for producing the aromatic polycarbonate comprises condensation-polymerizing an aromatic dihydroxy compound and a carbonic diester. The starting materials each has been regulated so that (1) the sodium content therein is 52 ppb or lower and (2) the concentrations of iron, chromium, manganese, nickel, and lead therein each is 40 ppb or lower. For the polymerization, (3) a specific catalyst is used in a specific amount based on the iron contained in the starting materials.

    Abstract translation: 具有高耐久性和色调，透明性和机械强度优异的芳族聚碳酸酯，特别是在高温高湿条件下长期使用具有高耐久性和稳定性的芳族聚碳酸酯; 聚碳酸酯的制造方法; 及其用途。 芳香族聚碳酸酯的钠含量为100ppb以下，镍，铅，铬，锰，铁的含量分别为70ppb以下。 芳族聚碳酸酯的制造方法包括使芳香族二羟基化合物和碳酸二酯缩聚。 起始材料各自被调节，使得（1）其中的钠含量为52ppb以下，（2）其中的铁，铬，锰，镍和铅的浓度为40ppb以下。 对于聚合，（3）以起始原料中所含的铁为特定量使用特定的催化剂。

    SUBSTRATES FOR OPTICAL STORAGE MEDIA
    4.
    发明申请
    SUBSTRATES FOR OPTICAL STORAGE MEDIA 审中-公开
    底物，光存储介质

    公开(公告)号：WO00070607A1

    公开(公告)日：2000-11-23

    申请号：PCT/EP2000/003925

    申请日：2000-05-02

    IPC: C08F297/04 ,  C08F8/04 ,  C08F10/14 ,  G11B7/2533 ,  G11B7/2536 ,  G11B7/24

    CPC classification number: G11B7/2533 ,  C08F8/04 ,  G11B7/2536

    Abstract: The invention relates to substrates based on vinylcyclohexane homopolymers, copolymers and blockpolymers, wherein comonomers are selected from the group consisting of olefins, acrylic acid derivatives, maleic acid derivatives, vinyl ether and vinyl ester or mixtures thereof and from at least two comonomers. The invention is characterized in that the moment of inertia of the substrate ranges from 280 to 50 g cm and specific density from 1 to 0.8 g/cm .

    Abstract translation: 基于均聚物，共聚物和/或乙烯基环己烷的嵌段聚合物底物，所述共聚单体选自烯烃，丙烯酸衍生物，马来酸衍生物，乙烯基醚和乙烯基酯或它们的混合物中选择的其至少两种共聚单体的，其特征在于的基片280的转动惯量 50 g.cm <2>和的1至0.8克/厘米<3>，分别比重。

    OPTICAL RECORDING MEDIUM AND SUBSTRATE FOR USE THEREIN
    8.
    发明申请
    OPTICAL RECORDING MEDIUM AND SUBSTRATE FOR USE THEREIN 审中-公开
    光记录介质及其使用的基板

    公开(公告)号：WO01082298A1

    公开(公告)日：2001-11-01

    申请号：PCT/JP2001/003523

    申请日：2001-04-24

    IPC: C08F8/04 ,  G11B7/24 ,  G11B7/243 ,  G11B7/2433 ,  G11B7/2533 ,  G11B7/2536 ,  G11B7/257 ,  G11B7/2578 ,  G11B7/258 ,  G11B7/2585

    CPC classification number: C08F8/04 ,  G11B7/24 ,  G11B7/2433 ,  G11B7/2533 ,  G11B7/2536 ,  G11B7/2578 ,  G11B7/2585 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  C08F12/08

    Abstract: An optical recording medium for recording and reproducing information utilizing the change of a physical property of a recording layer caused by the irradiation with light, which comprises a substrate, characterized in that the substrate comprises a hydrogenated styrene polymer having a content of nucleus-hydrogenated styrene units of 80 wt % or more, has a glass transition temperature of 110 DEG C or higher, has a light transmittance of 88 % or more at 400 nm, and exhibits an absolute value of retardation of 30 nm or less at 0 DEG and 30 DEG from the normal direction of the plane thereof. The optical recording medium suitable for use in the high density optical recording capable of responding to a greater number of openings and the use of a light having a shorter wave length in an optical head.

    Abstract translation: 一种光记录介质，用于利用由光照射而引起的记录层的物理特性的改变来记录和再现信息，该记录介质包括基板，其特征在于，所述基板包括具有核氢化苯乙烯含量的氢化苯乙烯聚合物 单位为80重量％以上的玻璃化转变温度为110℃以上，在400nm下的透光率为88％以上，在0°，30°时具有30nm以下的绝对值 DEG从其平面的法线方向。 适用于能够响应更多数量的开口的高密度光学记录的光学记录介质以及在光学头中具有较短波长的光的使用。

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