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    Processes for the preparation of titanyl phthalocyanines
    1.
    发明授权
    Processes for the preparation of titanyl phthalocyanines 失效
    制备钛酞菁的方法

    公开(公告)号：US5350844A

    公开(公告)日：1994-09-27

    申请号：US24145

    申请日：1993-03-01

    申请人： Trevor I. Martin ,  James D. Mayo ,  Nancy A. Listigovers ,  Cheng K. Hsiao ,  Terry L. Bluhm ,  Sharon E. Normandin ,  Kathleen M. Carmichael

    发明人： Trevor I. Martin ,  James D. Mayo ,  Nancy A. Listigovers ,  Cheng K. Hsiao ,  Terry L. Bluhm ,  Sharon E. Normandin ,  Kathleen M. Carmichael

    IPC分类号： C09B67/12 ,  C09B67/16 ,  C09B67/50

    CPC分类号： C09B67/0016 ,  C09B67/0019 ,  C09B67/0026

    摘要： A process for the preparation of a more perfect crystalline form of the Type I polymorph of titanyl phthalocyanine which comprises dissolving a precursor titanyl phthalocyanine Type I in a solution of trihaloacetic acid and alkylene chloride; adding the resultant solution to a solvent thereby enabling precipitation of Type X titanyl phthalocyanine; separating the titanyl phthalocyanine Type X from the solution; followed by a first washing with an organic solvent and a second washing with water; slurrying the resulting Type X titanyl phthalocyanine in an organic solvent enabling conversion of said Type X to Type IV titanyl phthalocyanine; and thereafter, subjecting the Type IV titanyl phthalocyanine obtained to treatment with an organic solvent to enable said crystalline form of titanyl phthalocyanine Type I.

    摘要翻译： 制备氧化钛酞菁的I型多晶型物的更完美结晶形式的方法，其包括将前体氧钛酞菁I溶解在三卤代乙酸和亚烷基氯的溶液中; 将所得溶液加入到溶剂中，从而使X型氧钛酞菁沉淀; 从溶液中分离X型氧钛酞菁; 然后用有机溶剂进行第一次洗涤，并用水洗涤第二次; 将得到的X型氧钛酞菁在有机溶剂中制浆，使所述X型转化为IV型氧钛酞菁; 然后，将得到的IV型钛酞菁用有机溶剂进行处理，得到所述晶型的钛氧酞菁I型。

    Control of the acid/base environment in photoconductive elements
    7.
    发明授权
    Control of the acid/base environment in photoconductive elements 失效
    光电导元件酸/碱环境的控制

    公开(公告)号：US5356741A

    公开(公告)日：1994-10-18

    申请号：US71360

    申请日：1993-06-03

    申请人： Kathleen M. Carmichael ,  Sharon E. Normandin ,  Donald P. Sullivan ,  Edward F. Grabowski ,  Emery G. Tokoli

    发明人： Kathleen M. Carmichael ,  Sharon E. Normandin ,  Donald P. Sullivan ,  Edward F. Grabowski ,  Emery G. Tokoli

    IPC分类号： G03G5/00 ,  G03G5/04 ,  G03G5/05

    CPC分类号： G03G5/0503

    摘要： A method of controlling variations in electrical characteristics in electrophotographic imaging devices by eliminating the effect of acidic or basic impurities in a photoconductive element. A solution of a weak acid or weak base and a conjugate salt of the weak acid and the weak base is incorporated into a layer of the photoconductive element. In a process for producing the photoconductive element, a substrate is coated with a first dispersion to form a charge generating layer, and then coated with a second dispersion to form a charge transporting layer, wherein there is incorporated in at least one of the first and second dispersions a solution of a weak acid or weak base and the conjugate salt of the weak acid and weak base in an amount effective to reduce variations in the dark development potential (V.sub.DDP) and background potential (V.sub.BG) characteristics of the imaging devices.

    摘要翻译： 通过消除光电导元件中的酸性或碱性杂质的影响来控制电子照相成像装置中电特性的变化的方法。 将弱酸或弱碱和弱酸和弱碱的共轭盐的溶液并入光电导元件的层中。 在制造光电导元件的方法中，用第一分散体涂覆基板以形成电荷产生层，然后用第二分散体涂覆以形成电荷输送层，其中，将至少一个第一和 第二分散弱酸或弱碱的溶液和弱酸和弱碱的共轭盐，其量可有效地减少成像装置的黑暗显现电位（VDDP）和背景电位（VBG）特性的变化。