Dimensionally stable polycarbonate articles
    1.
    发明授权
    Dimensionally stable polycarbonate articles 失效
    尺寸稳定的聚碳酸酯制品

    公开(公告)号:US06552158B1

    公开(公告)日:2003-04-22

    申请号:US10064348

    申请日:2002-07-03

    IPC分类号: C08G6400

    CPC分类号: G11B7/2534 C08G64/06

    摘要: The disclosure relates to articles using polycarbonates produced by a melt transesterification polymerization method using bis(hydroxyaryl)cyclohexanes. Such polycarbonates have suitable glass transition temperatures and outstanding dimensional stabilities, thus making them particularly useful for making articles possessing high temperature stability, particularly for use in optical articles such as high density optical data storage and recordable media.

    摘要翻译: 本公开涉及使用通过使用双(羟基芳基)环己烷的熔融酯交换聚合方法制备的聚碳酸酯的制品。 这种聚碳酸酯具有合适的玻璃化转变温度和优异的尺寸稳定性,因此使其特别适用于具有高温稳定性的制品,特别适用于光学制品如高密度光学数据存储和可记录介质。

    ALIPHATIC DIOL-BASED POLYCARBONATES, METHOD OF MAKING, AND ARTICLES FORMED THEREFROM
    6.
    发明申请
    ALIPHATIC DIOL-BASED POLYCARBONATES, METHOD OF MAKING, AND ARTICLES FORMED THEREFROM 有权
    基于二氧化硅的聚碳酸酯,其制备方法和形成的制品

    公开(公告)号:US20090105444A1

    公开(公告)日:2009-04-23

    申请号:US11874871

    申请日:2007-10-18

    IPC分类号: C08G64/04

    摘要: The above-described and other deficiencies of the art are met by a method of making a polycarbonate polymer comprising isosorbide carbonate units, comprising melt reacting a dihydroxy compound comprising an isosorbide of the general formula (2a): and an activated carbonate, in the presence of a catalyst consisting essentially of a sodium salt capable of providing a hydroxide ion, wherein the polycarbonate polymer comprises greater than or equal to 50 mol % isosorbide carbonate units, and wherein the polycarbonate polymer has a Mw of greater than or equal to about 40,000 g/mol as determined by gel-permeation chromatography relative to polystyrene standards. Polycarbonates comprising the isosorbide carbonate unit, including isosorbide homopolycarbonate and an isosorbide-based polyester-polycarbonate, are also disclosed, as are a thermoplastic composition and an article including the isosorbide-based polycarbonate polymer.

    摘要翻译: 通过制备包含异山梨醇碳酸酯单元的聚碳酸酯聚合物的方法,包括使包含通式(2a)的异山梨醇的二羟基化合物与活化的碳酸酯在存在下熔融反应来实现本领域的上述和其它缺陷: 基本上由能够提供氢氧根离子的钠盐组成的催化剂,其中所述聚碳酸酯聚合物包含大于或等于50mol%的异山梨醇碳酸酯单元,并且其中所述聚碳酸酯聚合物具有大于或等于约40,000g / mol,通过凝胶渗透色谱法相对于聚苯乙烯标准物测定。 还公开了包含异山梨醇碳酸酯单元的聚碳酸酯,包括异山梨醇均聚碳酸酯和异山梨醇基聚酯 - 聚碳酸酯,热塑性组合物和包含异山梨醇基聚碳酸酯聚合物的制品也是如此。