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    Process for the production of copolycarbonates with reduced color
    1.
    发明申请
    Process for the production of copolycarbonates with reduced color 失效
    用于生产具有降低颜色的共聚碳酸酯的方法

    公开(公告)号：US20050171323A1

    公开(公告)日：2005-08-04

    申请号：US10925833

    申请日：2004-08-24

    申请人： Jan Kamps ,  Jan Lens

    发明人： Jan Kamps ,  Jan Lens

    IPC分类号： C08G64/30 ,  C08G64/00

    CPC分类号： C08G64/307

    摘要： A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps of mixing the precursors of monomer residues, a carbonate source and a polymerization catalyst into a reaction mixture. The method further includes the steps of introducing an antioxidant such as a hydroxycarboxylic acid to the reaction mixture in an amount sufficient to reduce color formation and introducing the reaction mixture to a series of process units wherein the reaction mixture polymerizes. The resulting copolycarbonate has improved color as compared to a copolycarbonate formed in a process without the step of introducing an antioxidant to the melt polymerization process.

    摘要翻译： 提供了一种减少在包括醌型残留物的共聚碳酸酯生产期间产生的颜色的方法。 该方法包括将单体残基前体，碳酸酯源和聚合催化剂混合到反应混合物中的步骤。 该方法还包括以下步骤：将足够减少颜色形成的量的羟基羧酸的抗氧化剂引入反应混合物中，并将反应混合物引入反应混合物聚合的一系列处理单元。 所得共聚碳酸酯与在不进行熔融聚合反应的抗氧化剂步骤的方法中形成的共聚碳酸酯相比具有改善的颜色。

    Polymers, polymer compositions and method of preparation
    2.
    发明申请
    Polymers, polymer compositions and method of preparation 有权
    聚合物，聚合物组合物和制备方法

    公开(公告)号：US20070123683A1

    公开(公告)日：2007-05-31

    申请号：US11289210

    申请日：2005-11-29

    申请人： Nagarajan Arumugam ,  Radhakrishna As ,  Jan Lens ,  Tilak Raj ,  Binod Sahoo ,  Subash Scindia

    发明人： Nagarajan Arumugam ,  Radhakrishna As ,  Jan Lens ,  Tilak Raj ,  Binod Sahoo ,  Subash Scindia

    IPC分类号： C08G18/00 ,  C08G64/00

    CPC分类号： C08G64/12 ,  C08G63/6856 ,  C08G64/14 ,  C08G71/04

    摘要： A polymer comprising at least one structural unit derived from a dihydroxy compound of Formula (I) wherein R1 is an aromatic divalent functionality having 6 to 60 carbons, R2 can be the same or different at each occurrence and is independently at each occurrence selected from the group consisting of a cyano functionality, a nitro functionality, a halogen, an aliphatic functionality having 1 to 10 carbons, a cycloaliphatic functionality having 3 to 10 carbons and an aromatic functionality having 6 to 10 carbons and “n” is an integer having a value 0 to 3.

    摘要翻译： 包含衍生自式（I）的二羟基化合物的至少一种结构单元的聚合物，其中R 1是具有6至60个碳的芳族二价官能团，R 2 2可以是 在每次出现时相同或不同，并且在每次出现时独立地选自氰基官能度，硝基官能度，卤素，具有1至10个碳的脂族官能团，具有3至10个碳的脂环族官能团和芳族 具有6至10个碳的官能团和“n”是0至3的整数。

    Process for the production of copolycarbonates with reduced color
    6.
    发明申请
    Process for the production of copolycarbonates with reduced color 有权
    用于生产具有降低颜色的共聚碳酸酯的方法

    公开(公告)号：US20050171322A1

    公开(公告)日：2005-08-04

    申请号：US10768575

    申请日：2004-01-29

    申请人： Jan Kamps ,  Jan Lens

    发明人： Jan Kamps ,  Jan Lens

    IPC分类号： C08G64/30 ,  C08G64/00

    CPC分类号： C08G64/307

    摘要： A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps preparing a reaction mixture containing precursors of monomer residues, selecting a catalyst introduction strategy and adding catalysts according to the strategy. The strategy is sufficient to result in a product copolycarbonate with improved color. The method further includes the steps of introducing the reaction mixture to a series of process units and allowing the reaction mixture to polymerize thereby forming a copolycarbonate. The resulting copolycarbonate has improved color as compared to a copolycarbonate formed in a process without the steps of selecting a catalyst introduction strategy and introducing catalysts according to the selected strategy.

    摘要翻译： 提供了一种减少在包括醌型残留物的共聚碳酸酯生产期间产生的颜色的方法。 该方法包括制备含有单体残余物的反应混合物的步骤，选择催化剂引入策略并根据该策略加入催化剂。 该策略足以产生具有改进颜色的产品共聚碳酸酯。 该方法还包括将反应混合物引入一系列处理单元并使反应混合物聚合从而形成共聚碳酸酯的步骤。 所得共聚碳酸酯与在不进行选择催化剂引入策略和引入催化剂的步骤的步骤中形成的方法相比，具有改进的颜色。