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    • 5. 发明申请
    • METHOD FOR MAKING COPOLYCARBONATES
    • 制备共聚碳酸酯的方法
    • WO2004041907A1
    • 2004-05-21
    • PCT/US2003/033716
    • 2003-10-24
    • GENERAL ELECTRIC COMPANYLENS, Jan, PleunKAMPS, Jan, Henk
    • LENS, Jan, PleunKAMPS, Jan, Henk
    • C08G64/30
    • C08G64/307C08G64/06
    • A melt polymerization method is presented which permits the efficient preparation of copolycarbonates in which one or more of the constituent dehydroxy aromatic compounds employed is relatively volatile, having a boiling point of less than about 340 °C. Relatively volatile dihydroxy aromatic compounds are illustrated by dihydroxybenzenes such as hydroquinone, methyl hydroquinone and resorcinol. Known methods for the preparation of members of this class of copolycarbonates, such as the melt reaction of bisphenol A and resorcinol diphenyl carbonate in the presence of sodium hydroxide and tetraalkylammonium salt catalyst systems, suffer losses in efficiency due to the resorcinol being entrained out of the polymerization mixture with by-product phenol. Catalyst systems including quaternary phosphonium salts are shown to have improved performance with respect to the amount of volatile dihydroxy aromatic compound actually incorporated into the product copolycarbonate.
    • 提出了熔融聚合方法,其可以有效地制备其中一种或多种所用的组分脱羟基芳族化合物相对挥发的共聚碳酸酯,其沸点低于约340℃。 相对挥发性的二羟基芳族化合物由二羟基苯如氢醌,甲基氢醌和间苯二酚表示。 用于制备这种类型的共聚碳酸酯的成员的已知方法,例如双酚A和间苯二酚碳酸二苯酯在氢氧化钠和四烷基铵盐催化剂体系的存在下的熔融反应,由于间苯二酚被夹带在 聚合混合物与副产物苯酚。 显示出包含季鏻盐的催化剂体系相对于实际掺入到产物共聚碳酸酯中的挥发性二羟基芳族化合物的量具有改进的性能。
    • 7. 发明申请
    • PROCESS FOR PRODUCTION OF COPOLYCARBONATES WITH REDUCED COLOR
    • 生产具有降低颜色的共聚碳酸酯的方法
    • WO2005073274A1
    • 2005-08-11
    • PCT/US2005/002186
    • 2005-01-20
    • GENERAL ELECTRIC COMPANY?KAMPS, Jan, HenkLENS, Jan, Pleun
    • KAMPS, Jan, HenkLENS, Jan, Pleun
    • C08G64/30
    • C08G64/307
    • 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.
    • 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基前体的反应混合物,选择催化剂,引入策略和根据该策略加入催化剂的步骤。 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。
    • 8. 发明申请
    • PROCESS FOR THE PRODUCTION OF COPOLYCARBONATES WITH REDUCED COLOR
    • 生产具有降低颜色的共聚碳酸酯的方法
    • WO2005073273A1
    • 2005-08-11
    • PCT/US2005/001628
    • 2005-01-20
    • GENERAL ELECTRIC COMPANYKAMPS, Jan, HenkLENS, Jan, Pleun
    • KAMPS, Jan, HenkLENS, Jan, Pleun
    • C08G64/30
    • C08G64/307
    • 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.
    • 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。