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    • 32. 发明公开
    • PROCESS FOR PRODUCING POLYCARBONATE
    • 生产聚碳酸酯的方法
    • EP1081174A1
    • 2001-03-07
    • EP00906671.3
    • 2000-03-03
    • Ube Industries, Ltd.
    • NISHIHIRA, KeigoTANAKA, Shuji, Ube Production CenterYOSHIDA, Shinichi, Ube Production Center
    • C08G64/20C07C68/00C07C69/96
    • C08G64/307C07C68/00C07C69/96
    • A process for preparing polycarbonate is composed of the steps of transesterifying a dialkyl oxalate and a phenolic compound to give a diaryl oxalate; decarbonylating the diaryl oxalate to give a diaryl carbonate; reacting the diaryl carbonate with a polyvalent hydroxyl compound in the presence of a catalyst containing an amine compound or an ammonium compound to give the polycarbonate, removing a phenolic by-product/amine by-product mixture; collecting the mixture; purifying the mixture so that the amount of the amine by-product in the mixture is reduced to give a phenolic by-product mixture not containing the amine by-product in an amount of more than 600 ppm; and, utilizing thus purified phenolic mixture as a whole or a part of the phenolic compound in the first step.
    • 制备聚碳酸酯的方法由以下步骤组成:使草酸二烷基酯和酚类化合物酯交换,得到草酸二芳基酯; 使草酸二芳基酯脱羧得到碳酸二芳基酯; 在含有胺化合物或铵化合物的催化剂存在下使碳酸二芳基酯与多价羟基化合物反应以得到聚碳酸酯,除去酚类副产物/胺副产物混合物; 收集混合物; 纯化该混合物,使得混合物中胺副产物的量减少,得到不含胺含量超过600ppm的副产物的酚类副产物混合物; 并且在第一步中使用如此纯化的酚类混合物作为整体或部分酚类化合物。
    • 34. 发明公开
    • Process for production of aromatic polycarbonate resin and molded article of aromatic polycarbonate resin
    • 芳香族化合物聚碳酸酯和Geformstand Gegenstand aus aromatischem Polycarbonatharz
    • EP0995768A2
    • 2000-04-26
    • EP99308088.6
    • 1999-10-13
    • TEIJIN LIMITED
    • Matsumoto, Kyosuke, Teijin Ltd. Iwakuni Res. Ctr.Simonaru, Masasi, Teijin Ltd. Iwakuni Res. Ctr.Sawaki, Toru, Teijin Ltd. Iwakuni Res. Ctr.Sasaki, Katsushi, Teijin Ltd. Iwakuni Res. Ctr.Murakami, Masahiro, Teijin Ltd. Iwakuni Res. Ctr.Matsuoka, Yoshiki, Teijin Ltd. Iwakuni Res. Ctr.
    • C08G64/20
    • C08G64/307
    • An aromatic polycarbonate resin is produced under the conditions that the flow velocity of the reaction mixture in a pipe through which a molten reaction mixture passes is a specific value or over, the viscosity-average molecular weight of the reaction mixture is 1,000 or over, the sum of the average retention times of the reaction mixture is not longer than 3 hours, the wall temperature of the pipe through which a molten reaction mixture passes is set to be higher than the temperature of the reaction mixture in the pipe, the catalyst deactivation agent is added within 2 hours after the completion of the melt polycondensation reaction, the filtration is carried out by using a filter having a specific retained particle size under a specific pressure difference, specific treated amount of the aromatic polycarbonate resin per unit area of the filter and a ratio of W (flow quantity of filtered polymer) x 1,000/A (maximum area of the polymer path in the filtration vessel) falling within a specific range, etc.
      The present invention provides a process for producing an aromatic polycarbonate resin and its molded article having excellent color and transparency as well as excellent color stability and thermal stability in high efficiency while suppressing contamination with foreign matters and the discoloration and gel formation of the resin.
    • 在熔融反应混合物通过的管中的反应混合物的流速为特定值以上的条件下制造芳族聚碳酸酯树脂,反应混合物的粘均分子量为1000以上, 反应混合物的平均保留时间的总和不超过3小时,熔融反应混合物通过的管的壁温设定为高于管中的反应混合物的温度,催化剂失活剂 在熔融缩聚反应完成后2小时内加入,过滤通过使用具有特定保留粒径的特定压力差的过滤器,每单位面积过滤器的芳族聚碳酸酯树脂的特定处理量, 过滤聚合物的W(过滤聚合物的流量)×1,000 / A(过滤容器中的聚合物路径的最大面积)的比率落入 特定范围等。本发明提供一种芳香族聚碳酸酯树脂及其成型体的制造方法,其具有优异的颜色和透明性,并且在高效率下具有优异的颜色稳定性和热稳定性,同时抑制异物污染和变色和凝胶形成 的树脂。
    • 37. 发明公开
    • Method for preparing polycarbonate by solid state polymerization
    • Verfahren zur Herstellung von Polycarbonat durch Festphasenpolykendingensation
    • EP0849305A2
    • 1998-06-24
    • EP97302927.5
    • 1997-04-29
    • GENERAL ELECTRIC COMPANY
    • Varadarajan, Godavarthi S.Idage, BhaskarSivaram, SwaminathanKing, Joseph AnthonyHait, Sukhendu Bikash
    • C08G64/20C08G64/40C08G64/30
    • C08G64/42C08G64/14C08G64/20C08G64/307
    • Solid state polycarbonate formation comprises an initial step of converting a precursor polycarbonate to an enhanced crystallinity precursor polycarbonate and a second step of polymerizing said enhanced crystallinity precursor polycarbonate in the solid state. Several options are employed. These include modifying the precursor polycarbonate by contact with a dihydroxy compound or diaryl carbonate, conversion of the precursor polycarbonate to the enhanced crystallinity polymer by contact with at least one compound selected from the group consisting of alkali metal hydroxides, tetraalkylammonium hydroxides, tetraalkylammonium carboxylates, tetraalkylphosphonium hydroxides and tetraalkylphosphonium carboxylates, and conducting the solid state polymerization in the presence of a catalytic amount of at least one tetralkylammonium or tetraalkylphosphonium carboxylate. The preferred tetralkylammonium compounds are tetramethylammonium maleate and tetramethylammonium hydroxide. Polymerization may be conducted in the presence of a solvent resistance-imparting monomer such as hydroquinone or resorcinol or a branching agent such as 1,1,1-tris(4-hydroxyphenyl)ethane.
    • 固态聚碳酸酯形成包括将前体聚碳酸酯转化为增强的结晶性前体聚碳酸酯的初始步骤和将固体状态的所述增强的结晶度前体聚碳酸酯聚合的第二步骤。 采用了几个选项。 这些包括通过与二羟基化合物或碳酸二芳基酯接触来改性前体聚碳酸酯,通过与至少一种选自碱金属氢氧化物,四烷基铵氢氧化物,四烷基铵羧酸盐,四烷基鏻鎓盐的化合物接触,将前体聚碳酸酯转化为增强的结晶度聚合物 氢氧化物和四烷基鏻羧酸盐,并在催化量的至少一种四烷基铵或四烷基鏻羧酸盐的存在下进行固态聚合。 优选的四烷基铵化合物是马来酸四甲基铵和氢氧化四甲基铵。 聚合可以在赋予耐溶剂性的单体如氢醌或间苯二酚或支化剂如1,1,1-三(4-羟基苯基)乙烷的存在下进行。