| 摘要 |
Photoconductive imaging members comprise unsymmetrical dimeric perylene as a charge generator, where the perylene has the formula (I) (where R = H, alkyl, cycloalkyl, aryl or aralkyl; and X-Y = unsymmetrical bridging moiety of alkylene, arylene, or aralkylene). Also claimed is a photoconductive imaging member comprised of a supporting substrate, a photogenerator layer comprised of an unsymmetrical perylene bisimide photogenerator pigment as represented by formula (I). Also claimed is an imaging method which comprises the formation of a latent image on the photoconductive imaging member, developing the image with a toner composition comprised of resin and pigment, transferring the image to a substrate and fixing the image thereto. Preferably the supporting substrate is a metal (esp. aluminium), a conductive polymer composition, or an insulating polymer with a thickness of 30 - 300 microns optionally overcoated with an electrically conductive layer of thickness 0.01 - 1 micron. The unsymmetrical dimer photogenerator pigment is dispersed in a resinous binder (polyester, polyvinylcarbazole, polyvinylbutyral, polycarbonate, polyethercarbonate, aryl amine polymer, styrene copolymer or phenoxy resin ) in an amount of 5 - 95 wt.%. There is also a charge transport layer comprised of aryl amine molecules dispersed in a highly insulating polymer (polycarbonate, polyester, or vinyl polymer) at 20 - 60% (pref. 30 - 50 %), in which X is alkyl or halogen. The photogenerating layer is of thickness 0.2 - 10 microns, with a further charge transport layer of thickness 10 100 microns, with a supporting substrate overcoated with a polymeric adhesive layer of polyester of thickness 0.01 - 1 micron. |
