NAPHTHALENE TETRACARBOXYLIC ACID DIIMIDE-BASED POLYMER, AND ELECTROPHOTOGRAPHIC PHOTOSENSITIZER CAPABLE OF DECREASING IMAGE DEFECTS AND INHIBITING INCREASE IN EXPOSURE POTENTIAL, ELECTROPHOTOGRAPHIC CARTRIDGE, ELECTROPHOTOGRAPHIC DRUM AND ELECTROPHOTOGRAPHIC IMAGE FORMING DEVICE USING THE SAME

摘要

PURPOSE: Provided is a naphthalene tetracarboxylic acid diimide-based polymer useful for electrophotography, which inhibits introduction of holes from a conductive support to minimize image defects and to prevent an increase in exposure potential, and is not affected by humidity. CONSTITUTION: The naphthalene tetracarboxylic acid diimide-based polymer is represented by the following formula 1. In formula 1, R1 is H, a halogen atom, a C1-C20 substituted or non-substituted alkyl group, a C1-C20 substituted or non-substituted alkoxy group, a C6-C30 substituted or non-substituted aryl group or a C7-C30 aralkyl group; R2 is a C1-C20 substituted or non-substituted alkylene group, a C1-C20 substituted or non-substituted oxyalkylene group, a C6-C30 substituted or non-substituted arylene group or a C7-C30 aralkylene group; and n is an integer of 3-200.