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    • 4. 发明授权
    • Method for preparation of polycarbonates
    • 聚碳酸酯的制备方法
    • US06277946B1
    • 2001-08-21
    • US09567826
    • 2000-05-09
    • Johannes Jacobus van HeijkantChristopher PoirierTomoaki ShimodaAkio KanezawaCarlos Godinez Seoane
    • Johannes Jacobus van HeijkantChristopher PoirierTomoaki ShimodaAkio KanezawaCarlos Godinez Seoane
    • C08G6400
    • C08G64/307G11B7/253
    • A method is provided for the preparation of polycarbonates by the reaction of a diaryl carbonate, such as DPC and a dihydric phenol, such as BPA. The method utilizes the steps of successively processing the diaryl carbonate and the dihydric phenol in a melt in a first reaction stage, a second reaction stage and at least a first polymerization stage, and shifts the processing conditions such that the desired low viscosity/high end-cap product is obtained. This is achieved by having the ratio of diaryl carbonate to dihydric phenol in the melt prior to the first reaction stage greater than 1.08; and by controlling the temperature and residence time in the first polymerization stage to provide a polycarbonate product having a melt flow rate at 250° C. of greater than 10 g/min and an end-cap level of at least 90%. The method of the invention can be used in a linear manufacturing process, in which there is one product produced. The method of the invention can also be incorporated into a multi-line manufacturing process for the simultaneous production of more than one product. Thus, a stream of product produced from the first polymerization stage may be split into two or more lines which are further processed to produce, for example, a low viscosity, high end-cap product and a medium viscosity, moderate end-cap product.
    • 提供了通过碳酸二芳基酯如DPC和二元酚如BPA的反应来制备聚碳酸酯的方法。 该方法采用在第一反应阶段,第二反应阶段和至少第一聚合阶段中在熔体中连续加工碳酸二芳基酯和二元酚的步骤,并使加工条件转变为所需的低粘度/高端 -cap产品。 这通过在第一反应阶段之前使熔体中的碳酸二芳基酯与二元酚的比率大于1.08来实现; 并且通过控制在第一聚合阶段中的温度和停留时间被选择以提供熔体流动速率在250℃下大于10g / 10分钟且端帽水平至少为90%的聚碳酸酯产品。 本发明的方法可以用于生产一种产品的线性制造过程中。 本发明的方法还可以并入用于同时生产多于一种产品的多线制造工艺中。 因此,从第一聚合阶段生产的产品流可以分成两行或更多行,其进一步加工以产生例如低粘度,高端帽产品和中等粘度的适中的端帽产品。
    • 8. 发明授权
    • Method of manufacturing polycarbonate
    • 制造聚碳酸酯的方法
    • US5717057A
    • 1998-02-10
    • US581639
    • 1995-12-28
    • Takeshi SakashitaTomoaki ShimodaTakashi Nagai
    • Takeshi SakashitaTomoaki ShimodaTakashi Nagai
    • C08G64/30C08G64/40C08G64/00
    • C08G64/307
    • A method for manufacturing polycarbonate in which an aromatic dihydroxy compound and a carbonic acid diester can be effectively subjected to melt polycondensation using a small amount of a catalyst, making it possible to manufacture polycarbonate having outstanding color matching, outstanding thermal stability, color-matching stability, etc., during molding, and outstanding water resistance is characterized in that when an aromatic dihydroxy compound and a carbonic acid diester are subjected to melt polycondensation in the presence of a catalyst, the catalyst is dissolved or dispersed as a catalyst solution, this catalyst solution is added to the melt polycondensation reaction system, and the aromatic dihydroxy compound and carbonic acid diester are subjected to melt polycondensation.
    • 可以使用少量催化剂将芳族二羟基化合物和碳酸二酯有效地进行熔融缩聚的聚碳酸酯的制造方法,能够制造出色的匹配性,突出的热稳定性,色匹配稳定性的聚碳酸酯 等等,并且优异的耐水性的特征在于当芳族二羟基化合物和碳酸二酯在催化剂存在下进行熔融缩聚时,催化剂作为催化剂溶液溶解或分散,该催化剂 将溶液加入到熔融缩聚反应体系中,芳族二羟基化合物和碳酸二酯进行熔融缩聚反应。
    • 10. 发明授权
    • Preparation method of polycarbonate resin
    • 聚碳酸酯树脂的制备方法
    • US5606008A
    • 1997-02-25
    • US506280
    • 1995-07-21
    • Takeshi SakashitaTomoaki ShimodaTakashi Nagai
    • Takeshi SakashitaTomoaki ShimodaTakashi Nagai
    • C08G59/40C08G64/20C08G64/30C08G64/40C08G64/42C08G64/00B01J27/24B01J31/00
    • C08G64/307
    • The purpose of the present invention is to provide a method for manufacturing polycarbonate in which polycarbonate having outstanding color matching, outstanding thermal properties, particularly retention stability during molding, and outstanding water resistance can be effectively and easily manufactured.In the method for manufacturing polycarbonate of the present invention, an aromatic dihydroxy compound and a carbonic acid ester are subjected to melt condensation polymerization in the presence of a catalyst composed of(a) an aliphatic amine with 24-60 carbon atoms, and (b) an alkali metal compound and/or alkaline earth metal compound.The (a) aliphatic amine having 24-60 carbon atoms should preferably be an aliphatic tertiary amine and be used in the amount of 1.times.6.sup.-6 -1.times.10.sup.-1 moles for each mole of the aromatic dihydroxy compound, and the (b) alkali metal compound and/or alkaline earth metal compound should be used in an extremely minute specified amount.
    • 本发明的目的是提供一种制造聚碳酸酯的方法,其中可以有效且容易地制造其中具有优异的颜色匹配,优异的热性能,特别是成型时的保持稳定性和优异的耐水性的聚碳酸酯。 在本发明的聚碳酸酯的制造方法中,在(a)具有24-60个碳原子的脂族胺和(b)的催化剂的存在下,使芳族二羟基化合物和碳酸酯进行熔融缩聚 )碱金属化合物和/或碱土金属化合物。 (a)具有24-60个碳原子的脂族胺应优选为脂族叔胺,并且每摩尔芳族二羟基化合物的用量为1x6-6-1×10-1摩尔,而(b)碱金属 化合物和/或碱土金属化合物应以极微小的指定量使用。