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    • 5. 发明专利
    • Method for producing aromatic polycarbonate
    • 生产芳族聚碳酸酯的方法
    • JP2012067312A
    • 2012-04-05
    • JP2011232961
    • 2011-10-24
    • Teijin Ltd帝人株式会社
    • FUNAKOSHI WATARUKANEKO HIROAKIKAGEYAMA YUICHISASAKI KATSUJI
    • C08G64/30C08G64/40
    • C08G64/403
    • PROBLEM TO BE SOLVED: To provide a method for producing aromatic polycarbonate, which can enhance mechanical properties of molded products to a ductile range, can reduce the number of internal stressed point of sheet, can prevent transparency from lowering, and can minimize the number of white points generated under high-temperature high-humidity conditions.SOLUTION: There is provided a method for producing aromatic polycarbonate by melting and polycondensing an aromatic dihydroxy compound and diester carbonate in the presence of a transesterification catalyst, outside the scope surrounded by a curve connecting respective (Tc, Mn) points: (220, 4,000), (234, 4,810), (244, 6,510), (245, 7,400), (244, 9,210), (236, 12,050) and (226, 17,000), and two straight lines: Tc=220 and Mn=18,000, in the coordinates of a viscosity-average molecular weight Mn of reaction products as abscissa axis and the lowest temperature Tc (°C) being a temperature at the lowest temperature part inside polymerization equipment prescribed by the Mn as ordinate axis.
    • 要解决的问题:为了提供可以将模塑产品的机械性能提高到延展范围的芳族聚碳酸酯的制造方法,可以减少片材的内应力点的数量,可以防止透明性降低,并且可以最小化 在高温高湿条件下产生的白点数。 解决方案:提供一种通过在酯交换催化剂存在下熔融和缩聚芳族二羟基化合物和二酯碳酸酯来制备芳族聚碳酸酯的方法,该方法在连接各自(Tc,Mn)点的曲线外围:( 220,4,000),(234,4,810),(244,6,510),(245,7,400),(244,9,210),(236,12,050)和(226,17,000)以及两条直线:Tc = 220和 Mn = 18,000,作为横轴的反应产物的粘均分子量Mn的坐标,作为纵轴的Mn所示的聚合设备内的最低温度部分的温度的最低温度Tc(℃)。 版权所有(C)2012,JPO&INPIT
    • 7. 发明专利
    • Polymer pellet transporting method and storing method
    • 聚合物浆料运输方法和储存方法
    • JP2008260636A
    • 2008-10-30
    • JP2008072526
    • 2008-03-19
    • Mitsubishi Chemicals Corp三菱化学株式会社
    • KUMAZAWA KATSUHISATAURA TAKAYUKIYAMAMOTO MASANORI
    • B65G53/04B65G65/30
    • C08G64/403C08G63/89
    • PROBLEM TO BE SOLVED: To provide a polymer pellet transporting method using a simple means for pneumatically transporting hydroscopic polymer pellets without increasing the water content of the polymer pellets, and to provide a polymer pellet storing method. SOLUTION: The polymer pellet pneumatically transporting method is provided for pneumatically transporting the polymer pellets via a transport pipe together with a pressure gas stream. It comprises a gas dehumidifying step of reducing the amount of moisture in gas used for pneumatically transporting the polymer pellets to adjust the dew point of the gas down to 0°C or lower, a gas compressing step of compressing the gas whose dew point is adjusted down to 0°C or lower in the gas dehumidifying step, a pressure gas supply step for supplying the pressure gas compressed in the gas compressing step into the transport pipe at 50-600 Nm 3 /time per ton of the polymer pellets, and a transporting step of pneumatically transporting the polymer pellets via the transport pipe together with the pressure gas stream supplied into the transport pipe in the pressure gas supply step. COPYRIGHT: (C)2009,JPO&INPIT
    • 待解决的问题:提供一种使用简单的装置,用于气动输送吸水性聚合物颗粒的聚合物颗粒输送方法,而不增加聚合物颗粒的含水量,并提供聚合物颗粒储存方法。 解决方案:聚合物颗粒气动输送方法用于通过输送管与压力气流一起气动输送聚合物颗粒。 其包括气体除湿步骤,其减少用于气动输送聚合物颗粒的气体中的水分量,以将气体的露点调节至0℃或更低;气体压缩步骤,其压缩露点调节的气体 在气体除湿步骤中低至0℃或更低的压力气体供给步骤,用于将气体压缩步骤中压缩的压力气体以50-600Nm 3 /秒/次/吨 的聚合物颗粒的输送步骤,以及在压力气体供给步骤中与供给到输送管中的压力气体流一起经由输送管气动输送聚合物粒料的输送工序。 版权所有(C)2009,JPO&INPIT