| 摘要 |
PROBLEM TO BE SOLVED: To obtain a naphthalene tetracarboxylic acid diimide polymer, to provide an electrophotographic photosensitive body containing the same, an electrophotographic cartridge, an electrophotographic drum and an electrophotographic image-forming apparatus. SOLUTION: The naphthalene tetracarboxylic acid diimide polymer is represented by formula 1, wherein R<SB>1</SB>is hydrogen atom, a halogen atom, a 1-20C substituted or unsubstituted alkyl group, a 1-20C substituted or unsubstituted alkoxy group, a 6-30C substituted or unsubstituted aryl group, or a 7-30C substituted or unsubstituted aralkyl group; R<SB>2</SB>is a 1-20C substituted or unsubstituted alkylene group, a 1-20C substituted or unsubstituted oxyalkylene group, a 6-30C substituted or unsubstituted allylene group, or a 7-30C substituted or unsubstituted aralkylene group, in which the substituting group is a halogen, an alkyl group, a halogenated alkyl group, an oxyalkyl group or an aryl group; (n) is an integer of 3-200, preferably an integer of 5-50. COPYRIGHT: (C)2005,JPO&NCIPI
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