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    • 6. 发明申请
    • Method for Producing Polycarbonate Copolymer
    • 生产聚碳酸酯共聚物的方法
    • US20080221295A1
    • 2008-09-11
    • US10587974
    • 2005-02-17
    • Yasuhiro IshikawaKoichi SugaYoshio IkedaMasatoshi Saitou
    • Yasuhiro IshikawaKoichi SugaYoshio IkedaMasatoshi Saitou
    • C08G64/20C07C69/76C07C67/00
    • C08G64/183C08G63/64C08G64/24
    • The invention provides a method for producing a PC copolymer having a specific structure from a diester diol serving as a starting material, which method attains enhanced productivity.The method for producing a polycarbonate copolymer through interfacial polymerization, the copolymer having structural repeating units represented by formulas (I) and (II), wherein a phenol-modified diol having a hydroxybenzoic acid content of 500 ppm by mass or less is employed as a starting material. In formulas (I) and (II), each of R1 and R2 represents a C1 to C6 alkyl group; X represents a single bond, a C1 to C8 alkylene group, a C2 to C8 alkylidene group, a C5 to C15 cycloalkylene group, a C5 to C15 cycloalkylidene group, —S—, —SO—, —SO2—, —O—, —CO—, etc. Each of R3 and R4 represents a C1 to C3 alkyl group; Y represents a C2 to C15 linear-chain or branched alkylene group; a to d are integers of 0 to 4; and n is an integer of 2 to 450.
    • 本发明提供了从作为原料的二酯二醇制备具有特定结构的PC共聚物的方法,该方法提高了生产率。 通过界面聚合制备聚碳酸酯共聚物的方法,该共聚物具有由式(I)和(II)表示的结构重复单元,其中使用羟基苯甲酸含量为500质量ppm以下的苯酚改性二醇作为 起始材料 在式(I)和(II)中,R 1和R 2各自表示C 1至C 6烷基; X表示单键,C1至C8亚烷基,C2至C8亚烷基,C5至C15亚环烷基,C5至C15环烷叉基,-S-,-SO-,-SO2, R 3,O,-CO-等。R 3和R 4各自表示C 1至C 3烷基; Y表示C2〜C15直链或支链亚烷基; a至d为0至4的整数; n为2〜450的整数。
    • 10. 发明授权
    • Electrostatic copying apparatus
    • 静电复印机
    • US4110031A
    • 1978-08-29
    • US727501
    • 1976-09-28
    • Yutaka EbiMasatoshi Saitou
    • Yutaka EbiMasatoshi Saitou
    • G03G15/16G03G15/00
    • G03G15/1675
    • An electrostatic charge is applied to a dielectric peripheral surface of a transfer drum and a copy sheet is fed between the transfer drum and a photoconductive drum to transfer a toner image from the photoconductive drum to the copy sheet. The drums rotate at the same surface speed and in the same direction at adjacent portions thereof. The surface speed is maintained at a first value for a first toner transfer operation and then changed to a second value for a subsequent toner transfer operation. A voltage sensor in combination with a variable voltage source adjusts the value of the electrostatic charge on the transfer drum to a predetermined value at either surface speed.
    • 将静电电荷施加到转印鼓的介电外围表面,并且将复印纸馈送在转印鼓和感光鼓之间,以将调色剂图像从感光鼓转印到复印纸上。 鼓以相同的表面速度在相邻的部分处以相同的方向旋转。 表面速度保持在用于第一调色剂转印操作的第一值,然后变为第二值用于随后的调色剂转印操作。 与可变电压源组合的电压传感器将转印鼓上的静电电荷的值以任一表面速度调节到预定值。